ABOUT THIS COLLECTION

The Department of Radiation Oncology provides radiation medicine to the region's oncology patients and serves as the academic infrastructure for radiation science at UMass Chan Medical School. The Department is one of the largest in New England, providing state-of the-art clinical treatment service to cancer patients in Worcester County. This collection showcases journal articles and other publications produced by faculty and researchers of the Department of Radiation Oncology.

QUESTIONS?

Contact escholarship@umassmed.edu with your questions.

Recently Published

  • Practice patterns and recommendations for pediatric image-guided radiotherapy: A Children's Oncology Group report

    Hua, Chia-Ho; Ulin, Kenneth; Laurie, Frances; FitzGerald, Thomas J. (2020-10-01)
    This report by the Radiation Oncology Discipline of Children's Oncology Group (COG) describes the practice patterns of pediatric image-guided radiotherapy (IGRT) based on a member survey and provides practice recommendations accordingly. The survey comprised of 11 vignettes asking clinicians about their recommended treatment modalities, IGRT preferences, and frequency of in-room verification. Technical questions asked physicists about imaging protocols, dose reduction, setup correction, and adaptive therapy. In this report, the COG Radiation Oncology Discipline provides an IGRT modality/frequency decision tree and the expert guidelines for the practice of ionizing image guidance in pediatric radiotherapy patients.
  • The Effectiveness of Intraoperative Clip Placement in Improving Radiation Therapy Boost Targeting After Oncoplastic Surgery

    Riina, Matthew D.; Rashad, Ramy; Cohen, Stephanie; Brownlee, Zachary; Sioshansi, Shirin; Hepel, Jaroslaw; Chatterjee, Abhishek; Huber, Kathryn E. (2020-09-01)
    PURPOSE: The role of surgical clips as markers of the tumor bed cavity for radiation therapy boost targeting after oncoplastic surgery is not well understood. Therefore, we sought to evaluate whether the placement of surgical clips can reduce interobserver variability in the delineation of the tumor bed cavities of oncoplastic surgery patients and ultimately determine an optimal number of clips to place. METHODS AND MATERIALS: We reviewed records of 39 women with breast cancer who underwent oncoplastic breast surgery and adjuvant radiation therapy at our institution. Three radiation oncologists contoured tumor bed cavity volumes on planning computed tomography simulation images. Interobserver variability was measured both by a coefficient of variation of radiation oncologists contour volume and a concordance index defined as the quotient of the intersecting and aggregated volume of the contours. Patients were stratified by the number of surgical clips placed and compared by 1-way analysis of variance. Simple linear regression was used to evaluate the relationship of total excised volume and interobserver variability in patients with a sufficient quantity of surgical clips. RESULTS: Interobserver variability in the delineation of the tumor bed cavity as measured by concordance index was significantly reduced in patients who received intraoperative surgical clips (F = 5.755; P = .001). A similar trend was seen in contour volume (F = 2.616; P = .052). Results of 1-way analysis of variance and post hoc analysis showed that 4 clips are effective and sufficient for reproducible delineation of the tumor bed cavity for the radiation therapy boost. Increasing excision volume does not result in an increase in interobserver variability (r(2) = 0.00003). CONCLUSIONS: In oncoplastic surgery patients, intraoperative placement of surgical clips is beneficial and effective in improving the delineation of the tumor bed cavity for the radiation therapy boost. Four clips are necessary and sufficient for accurate boost targeting after lumpectomy with oncoplastic reconstruction.
  • Arvin S. Glicksman, MD 1924 to 2020

    FitzGerald, Thomas J. (2020-09-01)
    Arvin S. Glicksman died January 3, 2020, at his home in Uxbridge, Massachusetts. He was born in Brooklyn, New York, where he attended high school. After graduating from the University of Chicago Medical School, he served a medical internship at Kings County Hospital in Brooklyn, New York. Awarded a postdoctoral research fellowship at the Atomic Energy Commission, Arvin was recruited by physicist Leo Szilard to work in radiation science at both Brookhaven National Laboratory and Duke University. Working on the Manhattan Project introduced him to the science of radiation medicine and its potential effect on cancer management and normal tissue tolerance. He joined the Memorial Hospital and Sloan Kettering Institute (now Memorial Sloan Kettering in New York), where he worked for 15 years. He received a Research Career Development Award by the National Institute of Health and continued his research at the Institute for Cancer Research at the Royal Marsden Hospital in London, England. He was on faculty at the Mount Sinai Medical School, Mount Sinai Hospital in New York before being recruited to begin the Radiation Medicine Program at Brown University in Providence, Rhode Island, where he remained active for the rest of his life.
  • Open access image repositories: high-quality data to enable machine learning research

    Prior, Fred; Almeida, J.; Kathiravelu, P.; Kurc, T.; Smith, K.; FitzGerald, Thomas J.; Saltz, J. (2020-01-01)
    Originally motivated by the need for research reproducibility and data reuse, large-scale, open access information repositories have become key resources for training and testing of advanced machine learning applications in biomedical and clinical research. To be of value, such repositories must provide large, high-quality data sets, where quality is defined as minimising variance due to data collection protocols and data misrepresentations. Curation is the key to quality. We have constructed a large public access image repository, The Cancer Imaging Archive, dedicated to the promotion of open science to advance the global effort to diagnose and treat cancer. Drawing on this experience and our experience in applying machine learning techniques to the analysis of radiology and pathology image data, we will review the requirements placed on such information repositories by state-of-the-art machine learning applications and how these requirements can be met.
  • Treatment Toxicity: Radiation

    FitzGerald, Thomas J.; Bishop-Jodoin, Maryann; Laurie, Frances; Lukez, Alexander; O'Loughlin, Lauren; Sacher, Allison (2019-10-01)
    Intentional and unintentional radiation exposures have a powerful impact on normal tissue function and can induce short-term and long-term injury to all cell systems. Radiation effects can lead to lifetime-defining health issues for a patient and can produce complications to all organ systems. Providers need to understand acute and late effects of radiation treatment and how the fingerprints of therapy can have an impact on health care in later life. This article reviews current knowledge concerning normal tissue tolerance with therapy.
  • The VEGF receptor neuropilin 2 promotes homologous recombination by stimulating YAP/TAZ-mediated Rad51 expression

    Elaimy, Ameer L.; Amante, John J.; Zhu, Lihua Julie; Wang, Mengdie; Walmsley, Charlotte; Fitzgerald, Thomas J.; Goel, Hira Lal; Mercurio, Arthur M. (2019-07-09)
    Vascular endothelial growth factor (VEGF) signaling in tumor cells mediated by neuropilins (NRPs) contributes to the aggressive nature of several cancers, including triple-negative breast cancer (TNBC), independently of its role in angiogenesis. Understanding the mechanisms by which VEGF-NRP signaling contributes to the phenotype of such cancers is a significant and timely problem. We report that VEGF-NRP2 promote homologous recombination (HR) in BRCA1 wild-type TNBC cells by contributing to the expression and function of Rad51, an essential enzyme in the HR pathway that mediates efficient DNA double-strand break repair. Mechanistically, we provide evidence that VEGF-NRP2 stimulates YAP/TAZ-dependent Rad51 expression and that Rad51 is a direct YAP/TAZ-TEAD transcriptional target. We also discovered that VEGF-NRP2-YAP/TAZ signaling contributes to the resistance of TNBC cells to cisplatin and that Rad51 rescues the defects in DNA repair upon inhibition of either VEGF-NRP2 or YAP/TAZ. These findings reveal roles for VEGF-NRP2 and YAP/TAZ in DNA repair, and they indicate a unified mechanism involving VEGF-NRP2, YAP/TAZ, and Rad51 that contributes to resistance to platinum chemotherapy.
  • alphavbeta3 Integrin Mediates Radioresistance of Prostate Cancer Cells Through Regulation of Survivin

    Wang, Tao; Huang, Jiayi; Vue, Mai; Alavian, Michael R.; Goel, Hira Lal; Altieri, Dario C.; Languino, Lucia R.; Fitzgerald, Thomas J. (2019-02-01)
    The alphavbeta3 integrin is involved in various physiologic and pathologic processes such as wound healing, angiogenesis, tumor growth, and metastasis. The impact of alphavbeta3 integrin on the radiosensitivity of prostate cancer cells and the molecular mechanism controlling cell survival in response to ionizing radiation (IR) was investigated. Both LNCaP cells stably transfected with alphavbeta3 integrin and PC-3 cells that contain endogenous beta3 integrin were used. This study demonstrated that alphavbeta3 integrin increases survival of alphavbeta3-LNCaP cells upon IR while small hairpin RNA (shRNA)-mediated knockdown of alphavbeta3 integrin in PC-3 cells sensitizes to radiation. Expression of alphavbeta3 integrin in LNCaP cells also enhances anchorage-independent cell growth while knockdown of alphavbeta3 integrin in PC-3 cells inhibits anchorage-independent cell growth. The alphavbeta3 antagonist, cRGD, significantly increases radiosensitivity in both alphavbeta3-LNCaP and PC-3 cells. Moreover, alphavbeta3 integrin prevents radiation-induced downregulation of survivin. Inhibition of survivin expression by siRNA or shRNA enhances IR-induced inhibition of anchorage-independent cell growth. Overexpression of wild-type survivin in PC-3 cells treated with alphavbeta3 integrin shRNA increases survival of cells upon IR. These findings reveal that alphavbeta3 integrin promotes radioresistance and regulates survivin levels in response to IR. Implications: Future translational research on targeting alphavbeta3 integrin and survivin may reveal novel approaches as an adjunct to radiotherapy for patients with prostate cancer.
  • Optimisation of adaptive therapy for advanced Hodgkin lymphoma

    FitzGerald, Thomas J. (2019-02-01)
    Comment on: PET-adapted treatment for newly diagnosed advanced Hodgkin lymphoma (AHL2011): a randomised, multicentre, non-inferiority, phase 3 study. Casasnovas RO, Bouabdallah R, Brice P, Lazarovici J, Ghesquieres H, Stamatoullas A, Dupuis J, Gac AC, Gastinne T, Joly B, Bouabdallah K, Nicolas-Virelizier E, Feugier P, Morschhauser F, Delarue R, Farhat H, Quittet P, Berriolo-Riedinger A, Tempescul A, Edeline V, Maisonneuve H, Fornecker LM, Lamy T, Delmer A, Dartigues P, Martin L, André M, Mounier N, Traverse-Glehen A, Meignan M.Lancet Oncol. 2019 Feb;20(2):202-215. doi: 10.1016/S1470-2045(18)30784-8. Epub 2019 Jan 15.PMID: 30658935 Clinical Trial.
  • Preoperative Intensity Modulated Radiation Therapy Compared to Three-Dimensional Conformal Radiation Therapy for High-Grade Extremity Sarcomas in Children: Analysis of the Children's Oncology Group Study ARST0332

    Rao, Avani D.; Chen, Qinyu; Million, Lynn; Spunt, Sheri L.; Fitzgerald, Thomas J.; Hu, Chen; Rao, Sandesh S.; Laurie, Fran; Kessel, Sandy; Morano, Karen; et al. (2019-01-01)
    PURPOSE: For pediatric patients with large, high-grade, extremity nonrhabdomyosarcoma soft-tissue sarcomas, preoperative radiation therapy (RT) provides the opportunity for smaller radiation fields and tumor shrinkage resulting in less extensive surgery. The potential disadvantage is an increased risk of wound complications after surgery compared with rates after postoperative chemoradiation. We assessed the impact of preoperative RT technique on target coverage in relationship to dose to skin and adjacent joints to determine whether acute wound complications and late musculoskeletal injury might be influenced by treatment technique. METHODS AND MATERIALS: Of 550 eligible patients < 30 years of age, 200 were enrolled in arm D of ARST0332 and received neoadjuvant ifosfamide/doxorubicin, then chemoradiotherapy (45 Gy and ifosfamide) and surgery followed by postoperative RT if gross or microscopic positive surgical margins. One-hundred thirteen patients had extremity nonrhabdomyosarcoma soft-tissue sarcomas, of which 56 patients had preoperative RT plans for digital review. The doses to the target volume, skin (surface to 5 mm depth), adjacent joint, and extremity diameter were analyzed with respect to RT technique. RESULTS: Thirty-eight patients (65%) received 3-dimensional conformal RT (3D-CRT) and 18 (32%) received intensity modulated RT (IMRT). There was no difference in clinical target volume (CTV) size between groups (P = .920); however, IMRT plans had improved CTV coverage to 100% of the prescription dose compared with 3D-CRT plans (median CTV coverage, 92.7% vs 98.6%; P = .011). In patients without target overlap with the skin, IMRT use was associated with reduced percent volume of skin receiving 45 Gy or more (V45Gy) compared with 3D-CRT (median, 1.6% vs 6.3%, respectively; P = .005). IMRT was also associated with reduced V45Gy to the adjacent joint compared with 3D-CRT (median, 1.1% vs 13.2%; P = .018). CONCLUSIONS: Preoperative IMRT may improve CTV coverage and reduce the volume of skin and adjacent joint treated to high doses. Future studies should assess whether these dosimetric findings produce differences in clinical and toxicity outcomes.
  • Feasibility and accuracy of UF/NCI phantoms and Monte Carlo retrospective dosimetry in children treated on National Wilms Tumor Study protocols

    Kalapurakal, John A.; Gopalakrishnan, Mahesh; Mille, Matthew; Helenowski, Irene; Peterson, Susan; Rigsby, Cynthia; Laurie, Fran; Jung, Jae Won; Fitzgerald, Thomas J.; Lee, Choonsik (2018-12-01)
    PURPOSE: This pilot study was done to determine the feasibility and accuracy of University of Florida/National Cancer Institute (UF/NCI) phantoms and Monte Carlo (MC) retrospective dosimetry and had two aims: (1) to determine the anatomic accuracy of UF/NCI phantoms by comparing 3D organ doses in National Wilms Tumor Study (NWTS) patient-matched UF/NCI phantoms to organ doses in corresponding patient-matched CT scans and (2) to compare infield and out-of-field organ dosimetry using two dosimetry methods-standard radiation therapy (RT) treatment planning systems (TPS) and MC dosimetry in these two anatomic models. METHODS: Twenty NWTS patient-matched Digital Imaging and Communications in Medicine (DICOM) files of UF/NCI phantoms and CT scans were imported into the Pinnacle RT TPS. The NWTS RT fields (whole abdomen, flank, whole lung, or a combination) and RT doses (10-45 Gy) were reconstructed in both models. Both TPS and MC dose calculations were performed. For aim 1, the mean doses to the heart, kidney, thyroid gland, testes, and ovaries using TPS and MC in both models were statistically compared. For aim 2, the TPS and MC dosimetry for these organs in both models were statistically compared. RESULTS: For aim 1, there was no significant difference between phantom and CT scan dosimetry for any of the organs using either TPS or MC dosimetry. For aim 2, there was a significant difference between TPS and MC dosimetry for both CT scan and phantoms for all organs. Although the doses for infield organs were similar for both TPS and MC, the doses for near-field and out-of-field organs were consistently higher for 90% to 100% of MC doses; however, the absolute dose difference was small (Gy). CONCLUSIONS: This pilot study has demonstrated that the patient-matched UF/NCI phantoms together with MC dosimetry is an accurate model for performing retrospective 3D dosimetry in large-scale epidemiology studies such as the NWTS.
  • The Influence of Imaging in the Modern Practice of Radiation Oncology

    Fitzgerald, Thomas J.; Rosen, Mark A.; Bishop-Jodoin, Maryann (2018-11-15)
    The current practice of radiation oncology now requires a strong relationship with all radiology subspecialists and is embedded with a variety of imaging modalities and formats for both treatment planning and treatment execution. Unlike technology in the past, modern treatment technology delivery systems include kilovoltage imaging and cone beam computed tomography–guided treatment systems for daily patient treatment reproducibility. Today's radiation planning tools include 4-dimensional motion management and fusion software that can routinely blend anatomic and metabolic imaging for target volume definition. Imaging tools are used daily for each patient by all members of a modern radiation oncology department. As imaging tools improve and can be successfully registered with radiation planning imaging, targets will be further refined and patient-specific treatment planning optimized with confidence that the target is reproduced correctly every treatment day. Imaging has become symbiotic with all elements of daily practice, and application of emerging imaging tools will be an essential component of modern radiation oncology clinical translational research for the next generation of clinical trial investigators.
  • The Importance of Imaging in Radiation Oncology for National Clinical Trials Network Protocols

    Fitzgerald, Thomas J.; Bishop-Jodoin, Maryann; Laurie, Fran; Ulin, Kenneth; Moni, Janaki; Cicchetti, Maria Giulia (2018-11-15)
    Imaging is essential in successfully executing radiation therapy (RT) in oncology clinical trials. As technically sophisticated diagnostic imaging and RT were incorporated into trials, quality assurance in the National Clinical Trials Network groups entered a new era promoting image acquisition and review. Most trials involving RT require pre- and post-therapy imaging for target validation and outcome assessment. The increasing real-time (before and during therapy) imaging and RT object reviews are to ensure compliance with trial objectives. Objects easily transmit digitally for review from anywhere in the world. Physician interpretation of imaging and image application to RT treatment plans is essential for optimal trial execution. Imaging and RT data sets are used to credential RT sites to confirm investigator and institutional ability to meet trial target volume delineation and delivery requirements. Real-time imaging and RT object reviews can be performed multiple times during a trial to assess response to therapy and application of RT objects. This process has matured into an effective data management mechanism. When necessary, site and study investigators review objects together through web media technologies to ensure the patient is enrolled on the appropriate trial and the intended RT is planned and executed in a trial-compliant manner. Real-time imaging review makes sure: (1) the patient is entered and eligible for the trial, (2) the patient meets trial-specific adaptive therapy requirements, if applicable, and (3) the intended RT is according to trial guidelines. This review ensures the study population is uniform and the results are believable and can be applied to clinical practice.
  • Report from the SWOG Radiation Oncology Committee: Research Objectives Workshop 2017

    Okunieff, Paul; Fitzgerald, Thomas J.; Laurie, Fran (2018-08-01)
    The Radiation Therapy Committee of SWOG periodically evaluates its strategic plan in an effort to maintain a current and relevant scientific focus, and to provide a standard platform for future development of protocol concepts. Participants in the 2017 Strategic Planning Workshop included leaders in cancer basic sciences, molecular theragnostics, pharmaceutical and technology industries, clinical trial design, oncology practice, and statistical analysis. The committee discussed high-priority research areas, such as optimization of combined modality therapy, radiation oncology-specific drug design, identification of molecular profiles predictive of radiation-induced local or distant tumor responses, and methods for normal tissue-specific mitigation of radiation toxicity. The following concepts emerged as dominant questions ready for national testing: (i) what is the role of radiotherapy in the treatment of oligometastatic, oligorecurrent, and oligoprogressive disease? (ii) How can combined modality therapy be used to enhance systemic and local response? (iii) Can we validate and optimize liquid biopsy and other biomarkers (such as novel imaging) to supplement current response criteria to guide therapy and clinical trial design endpoints? (iv) How can we overcome deficiencies of randomized survival endpoint trials in an era of increasing molecular stratification factors? And (v) how can we mitigate treatment-related side effects and maximize quality of life in cancer survivors? The committee concluded that many aspects of these questions are ready for clinical evaluation and example protocol concepts are provided that could improve rates of cancer cure and quality of survival.
  • The Children's Oncology Group Radiation Oncology Discipline: 15 Years of Contributions to the Treatment of Childhood Cancer

    Breneman, John C.; Ulin, Kenneth (2018-07-15)
    PURPOSE: Our aim was to review the advances in radiation therapy for the management of pediatric cancers made by the Children's Oncology Group (COG) radiation oncology discipline since its inception in 2000. METHODS AND MATERIALS: The various radiation oncology disease site leaders reviewed the contributions and advances in pediatric oncology made through the work of the COG. They have presented outcomes of relevant studies and summarized current treatment policies developed by consensus from experts in the field. RESULTS: The indications and techniques for pediatric radiation therapy have evolved considerably over the years for virtually all pediatric tumor types, resulting in improved cure rates together with the potential for decreased treatment-related morbidity and mortality. CONCLUSIONS: The COG radiation oncology discipline has made significant contributions toward the treatment of childhood cancer. Our discipline is committed to continuing research to refine and modernize the use of radiation therapy in current and future protocols with the goal of further improving the cure rates and quality of life of children with cancer.
  • National Cancer Institute Workshop on Proton Therapy for Children: Considerations Regarding Brainstem Injury

    Haas-Kogan, Daphne; Fitzgerald, Thomas J.; Kun, Larry (2018-05-01)
    PURPOSE: Proton therapy can allow for superior avoidance of normal tissues. A widespread consensus has been reached that proton therapy should be used for patients with curable pediatric brain tumor to avoid critical central nervous system structures. Brainstem necrosis is a potentially devastating, but rare, complication of radiation. Recent reports of brainstem necrosis after proton therapy have raised concerns over the potential biological differences among radiation modalities. We have summarized findings from the National Cancer Institute Workshop on Proton Therapy for Children convened in May 2016 to examine brainstem injury. METHODS AND MATERIALS: Twenty-seven physicians, physicists, and researchers from 17 institutions with expertise met to discuss this issue. The definition of brainstem injury, imaging of this entity, clinical experience with photons and photons, and potential biological differences among these radiation modalities were thoroughly discussed and reviewed. The 3 largest US pediatric proton therapy centers collectively summarized the incidence of symptomatic brainstem injury and physics details (planning, dosimetry, delivery) for 671 children with focal posterior fossa tumors treated with protons from 2006 to 2016. RESULTS: The average rate of symptomatic brainstem toxicity from the 3 largest US pediatric proton centers was 2.38%. The actuarial rate of grade > /=2 brainstem toxicity was successfully reduced from 12.7% to 0% at 1 center after adopting modified radiation guidelines. Guidelines for treatment planning and current consensus brainstem constraints for proton therapy are presented. The current knowledge regarding linear energy transfer (LET) and its relationship to relative biological effectiveness (RBE) are defined. We review the current state of LET-based planning. CONCLUSIONS: Brainstem injury is a rare complication of radiation therapy for both photons and protons. Substantial dosimetric data have been collected for brainstem injury after proton therapy, and established guidelines to allow for safe delivery of proton radiation have been defined. Increased capability exists to incorporate LET optimization; however, further research is needed to fully explore the capabilities of LET- and RBE-based planning.
  • Patterns of Involved-Field Radiation Therapy Protocol Deviations in Pediatric Versus Adolescent and Young Adults With Hodgkin Lymphoma: A Report From the Children's Oncology Group AHOD0031

    Parzuchowski, Aaron; Fitzgerald, Thomas J.; Laurie, Fran; Terezakis, Stephanie A. (2018-04-01)
    PURPOSE: The presented protocol for pediatric intermediate-risk Hodgkin lymphoma evaluated the use of a dose-intensive chemotherapy regimen (ABVE-PC [doxorubicin, bleomycin, vincristine, etoposide, cyclophosphamide, prednisone]) with response-based therapy augmentation (addition of DECA [dexamethasone, etoposide, cisplatin, cytarabine]) or therapy reduction (elimination of radiation). METHODS AND MATERIALS: A central review of the radiation therapy data for quality assurance was performed, and the association between radiation protocol deviation (RPD) and relapse was assessed in the pediatric group (ageyears) and adolescent and young adult (AYA) group (age > /=15-21 years). Involved-field radiation therapy (IFRT) planning was reviewed before the start of treatment and at treatment completion. The records were reviewed through the Quality Assurance Review Center's central review to identify RPD, classified according to dose deviation (DD), volume deviation (VD), undertreatment (UT), and overtreatment (OT). DDs and VDs were further classified as major or minor. RESULTS: Of the 1712 patients enrolled, 1155 received IFRT, of whom, 216 (18.7%) had RPDs. The DD and VD patterns were similar between the pediatric and AYA groups. Minor VDs were most common. UT RPDs accounted for 69% in the pediatric group and 75% in the AYA group. Of the 35 patients with relapse and a RPD, 29 had an undertreatment RPD. Among the patients who received IFRT, a significant difference was found in the cumulative incidence rates of relapse between the pediatric and AYA groups (P = .03); however, no significant difference was found between patients with and without RPD (P = .2). CONCLUSIONS: Most RPDs were minor and consisted of UT in the AYA and pediatric populations both. No difference was observed in RPDs between the pediatric and AYA patients. Thus, in a well-defined and standardized protocol, the RPD distributions for AYA patients will be similar to those for pediatric population. However, the increased cumulative incidence of relapse in the AYA patients who had received IFRT compared with the pediatric population requires further exploration, given the potential differences in clinical outcomes in the AYA population.
  • American Association of Physicists in Medicine Task Group 263: Standardizing Nomenclatures in Radiation Oncology

    Mayo, Charles S.; Fitzgerald, Thomas J.; Hong, Theodore; Ulin, Kenneth (2018-03-15)
    A substantial barrier to the single- and multi-institutional aggregation of data to supporting clinical trials, practice quality improvement efforts, and development of big data analytics resource systems is the lack of standardized nomenclatures for expressing dosimetric data. To address this issue, the American Association of Physicists in Medicine (AAPM) Task Group 263 was charged with providing nomenclature guidelines and values in radiation oncology for use in clinical trials, data-pooling initiatives, population-based studies, and routine clinical care by standardizing: (1) structure names across image processing and treatment planning system platforms; (2) nomenclature for dosimetric data (eg, dose-volume histogram [DVH]-based metrics); (3) templates for clinical trial groups and users of an initial subset of software platforms to facilitate adoption of the standards; (4) formalism for nomenclature schema, which can accommodate the addition of other structures defined in the future. A multisociety, multidisciplinary, multinational group of 57 members representing stake holders ranging from large academic centers to community clinics and vendors was assembled, including physicists, physicians, dosimetrists, and vendors. The stakeholder groups represented in the membership included the AAPM, American Society for Radiation Oncology (ASTRO), NRG Oncology, European Society for Radiation Oncology (ESTRO), Radiation Therapy Oncology Group (RTOG), Children's Oncology Group (COG), Integrating Healthcare Enterprise in Radiation Oncology (IHE-RO), and Digital Imaging and Communications in Medicine working group (DICOM WG); A nomenclature system for target and organ at risk volumes and DVH nomenclature was developed and piloted to demonstrate viability across a range of clinics and within the framework of clinical trials. The final report was approved by AAPM in October 2017. The approval process included review by 8 AAPM committees, with additional review by ASTRO, European Society for Radiation Oncology (ESTRO), and American Association of Medical Dosimetrists (AAMD). This Executive Summary of the report highlights the key recommendations for clinical practice, research, and trials.
  • Potential Role of the Quality Assurance Review Center Platform in Global Radiation Oncology

    Ngwa, Wilfred; Irabor, Omoruyi Credit; Laurie, Fran; Moni, Janaki; Fitzgerald, Thomas J. (2017-11-15)
    The 2014 World Health Organization (WHO) Cancer Report describes an alarming growth in the cancer burden worldwide and underscores that, of the 14 million new cases of cancer and 8.2 million cancer-related deaths per year, 60% and 70%, respectively, occur in low-income and middle-income countries (LMICs). These countries are the least capable of dealing with cancer without some form of collaboration. The disparities in cancer-related deaths in part reflect poignant underlying inequalities in access to radiation oncology services; also, a majority of the population groups that experience disparities is significantly underrepresented in cancer clinical trials. One way to narrow this divide in cancer-related services is by including minorities, or populations from diverse backgrounds and resource-poor settings, in clinical trials. In recent publications, we have highlighted the enormous potential of information and communication technologies (ICTs)—technologies used in the transmission, manipulation, and storage of data by electronic means, including the internet, mobile phone systems, broadcast radio, and TV systems—in catalyzing high-impact international collaborations in global radiation oncology. Here, we describe the role of the ICT-powered Quality Assurance Review Center (QARC) platform in global radiation oncology care, research, and education, with the perspective of radiation oncologists at 8 institutions in East and West Africa.
  • Repeat Stereotactic Radiosurgery for Locally Recurrent Brain Metastases

    Koffer, Paul; Chan, Jason; Rava, Paul; Gorovets, Daniel; Ebner, Daniel; Savir, Guy; Kinsella, Timothy; Cielo, Deus; Hepel, Jaroslaw T. (2017-08-01)
    PURPOSE/OBJECTIVES: The outcomes of repeat stereotactic radiosurgery (SRS) after failure of previous SRS are not well established. We report our overall experience using SRS for the retreatment of locally recurrent brain metastases. METHODS: Patients with brain metastases diagnosed between 2003 and 2015 who underwent repeat SRS for local tumor progression following prior SRS were identified. Rates of local control, radiation necrosis, and overall survival were analyzed. Factors affecting local failure and radiation necrosis were assessed by chi-square test. RESULTS: Twenty-four lesions in 22 patients underwent repeat SRS in a single fraction. Median age was 59 years. The median SRS-1 dose was 18 Gy, and the median SRS-2 dose was 15.5 Gy. The median SRS-1 target volume was 2.25 cm(3), and the median SRS-2 target volume was 3.30 cm(3). The median follow-up from SRS-2 was 8.8 months. The actuarial local controls for SRS-2 were 94.1% and 61.1% at 6 and 12 months, respectively. The incidences of actuarial radiation necrosis were 9.2% and 9.2% at 6 and 12 months, respectively. Volume of tumor > 4 cm(3) correlated with increased risk of local failure (P = 0.006) with no local failures recorded with volumes < /=4 cm(3). SRS-2 dose, cumulative SRS dose, receipt of whole brain radiotherapy, and use of SRS-2 as boost after surgery did not correlate with local failure or radiation necrosis. Median overall survival after SRS-2 was 8.78 months. CONCLUSION: Repeat SRS is feasible for select patients, particularly for those with tumor volume < /=4 cm(3). Further evaluation is needed to establish the most appropriate treatment doses and volumes for this approach.
  • Association between cumulative radiation dose, adverse skin reactions, and changes in surface hemoglobin among women undergoing breast conserving therapy

    Chin, Michael S.; Siegel-Reamer, Leah; FitzGerald, Gordon A.; Wyman, Allison; Connor, Nikole M.; Lo, Yuan-Chyuan; Sioshansi, Shirin; Moni, Janaki; Cicchetti, Maria Giulia; Lalikos, Janice F.; et al. (2017-05-18)
    Introduction: Radiation therapy is crucial to effective cancer treatment. Modern treatment strategies have reduced possible skin injury, but few clinical studies have addressed the dose relationship between radiation exposure and skin reaction. This prospective clinical study analyzes skin oxygenation/perfusion in patients undergoing fractionated breast conserving therapy via hyperspectral imaging (HSI). Methods: Forty-three women undergoing breast conserving therapy were enrolled in this study. Optically stimulated luminescent dosimeters (OSLDs) measured radiation exposure in four sites: treatment breast, lumpectomy scar, medial tattoo and the control breast. The oxygenation/perfusion states of these sites were prospectively imaged before and after each treatment fraction with HSI. Visual skin reactions were classified according to the RTOG system. Results: 2753 observations were obtained and indicated a dose-response relationship between radiation exposure and oxygenated hemoglobin (OxyHb) after a 600 cGy cumulative dose threshold. There was a relatively weak association between DeoxyHb and radiation exposure. Results suggest strong correlations between changes in mean OxyHb and skin reaction as well as between radiation exposure and changes in skin reaction. Conclusion: HSI demonstrates promise in the assessment of skin dose as well as an objective measure of skin reaction. The ability to easily identify adverse skin reactions and to modify the treatment plan may circumvent the need for detrimental treatment breaks.

View more