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Zeng J, Badiyan SN, Garces YI, Wong T, Zhang X, Simone CB, Chang JY, Knopf AC, Mori S, Iwata H, Meijers A, Li H, Bues M, Liu W, Schild SE, Rengan R. Consensus Statement on Proton Therapy in Mesothelioma. Pract Radiat Oncol 2020; 11:119-133. [PMID: 32461036 DOI: 10.1016/j.prro.2020.05.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 04/26/2020] [Accepted: 05/13/2020] [Indexed: 12/11/2022]
Abstract
PURPOSE Radiation therapy for mesothelioma remains challenging, as normal tissue toxicity limits the amount of radiation that can be safely delivered to the pleural surfaces, especially radiation dose to the contralateral lung. The physical properties of proton therapy result in better sparing of normal tissues when treating the pleura, both in the postpneumonectomy setting and the lung-intact setting. Compared with photon radiation, there are dramatic reductions in dose to the contralateral lung, heart, liver, kidneys, and stomach. However, the tissue heterogeneity in the thorax, organ motion, and potential for changing anatomy during the treatment course all present challenges to optimal irradiation with protons. METHODS The clinical data underlying proton therapy in mesothelioma are reviewed here, including indications, advantages, and limitations. RESULTS The Particle Therapy Cooperative Group Thoracic Subcommittee task group provides specific guidelines for the use of proton therapy for mesothelioma. CONCLUSIONS This consensus report can be used to guide clinical practice, insurance approval, and future research.
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Affiliation(s)
- Jing Zeng
- Department of Radiation Oncology, University of Washington School of Medicine, Seattle, Washington.
| | - Shahed N Badiyan
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, Missouri
| | - Yolanda I Garces
- Department of Radiation Oncology, Mayo Clinic Rochester, Rochester, Minnesota
| | - Tony Wong
- Seattle Cancer Care Alliance Proton Therapy Center, Seattle, Washington
| | - Xiaodong Zhang
- Department of Radiation Physics, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | | | - Joe Y Chang
- Department of Radiation Oncology, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Antje C Knopf
- Division of Radiotherapy, University of Groningen, Groningen, Netherlands
| | - Shinichiro Mori
- Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Chiba, Japan
| | - Hiromitsu Iwata
- Department of Radiation Oncology, Nagoya Proton Therapy Center, Nagoya City West Medical Center, Nagoya, Japan
| | - Arturs Meijers
- Division of Radiotherapy, University of Groningen, Groningen, Netherlands
| | - Heng Li
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins Medicine, Baltimore, Maryland
| | - Martin Bues
- Department of Radiation Oncology, Mayo Clinic Arizona, Scottsdale, Arizona
| | - Wei Liu
- Department of Radiation Oncology, Mayo Clinic Arizona, Scottsdale, Arizona
| | - Steven E Schild
- Department of Radiation Oncology, Mayo Clinic Arizona, Scottsdale, Arizona
| | - Ramesh Rengan
- Department of Radiation Oncology, University of Washington School of Medicine, Seattle, Washington
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Kumawat N, Shrotriya AK, Heigrujam MS, Kumar S, Semwal MK, Bansal AK, Munjal RK, Mittal DK, Garg C, Anand AK. The Composite Planning Technique in Left Sided Breast Cancer Radiotherapy: A Dosimetric Study. Eur J Breast Health 2020; 16:137-145. [PMID: 32285036 DOI: 10.5152/ejbh.2020.5370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Accepted: 02/09/2020] [Indexed: 11/22/2022]
Abstract
Objective The aim of this retrospective study is to reduce the dose of heart, both lung and opposite breast and left anterior descending artery (LAD) and avoid long term complication and radiation induced secondary malignancies in radiotherapy left breast/chest wall without losing homogeneity and conformity of the Planning Target Volume (PTV), contoured using Radiotherapy Oncology Group (RTOG 1005) guideline. Materials and Methods The treatment plans were generated retrospectively by TFIF, VMAT and Composite techniques for 30 patients. Dose-Volume Histograms (DVHs) were evaluated for PTV and organs at risk (OAR's) and analyzed in two groups BCS and MRM using Wilcoxon signed rank test. Results The homogeneity index (HI) was improved in Composite technique by 32.72% and 21.81% of VMAT, 50.66% and 49.41% of TFIF in BCS and MRM group respectively. The Conformity Index (CI) for composite plan was statistically same as VMAT and superior by 27.94% and 41.37% of TFIF in BCS and MRM group respectively. The low dose volume V5Gy and V10Gy of the heart were improved in Composite plan by 47.9% and 26.1% of VMAT respectively in BCS group and in MRM group, improved by 21.2% and 45.6% of VMAT. The V5Gy and V10Gy of ipsilateral lung were improved in Composite plan by 16% and 13.7% of VMAT respectively in BCS and 8.4% and 3% of VMAT respectively in MRM group. Conclusion The Composite plan consisting of VMAT and TFIF plan with an optimum selection of fractions can achieve lower low dose exposure to the OAR's without compromising coverage compared to VMAT.
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Affiliation(s)
- Naveen Kumawat
- Department of Radiation Oncology; Max Super Speciality Hospital, New Delhi, India
| | | | | | - Satendra Kumar
- Department of Radiation Oncology; Max Super Speciality Hospital, New Delhi, India
| | - Manoj Kumar Semwal
- Department of Radiotherapy, Radiotherapy Army Hospital (Research and Referral), New Delhi, India
| | - Anil Kumar Bansal
- Department of Radiation Oncology; Max Super Speciality Hospital, New Delhi, India
| | - Ram Kishan Munjal
- Department of Radiation Oncology; Max Super Speciality Hospital, New Delhi, India
| | - Deepak Kumar Mittal
- Department of Radiation Oncology; Max Super Speciality Hospital, New Delhi, India
| | - Charu Garg
- Department of Radiation Oncology; Max Super Speciality Hospital, New Delhi, India
| | - Anil Kumar Anand
- Department of Radiation Oncology; Max Super Speciality Hospital, New Delhi, India
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Gomez DR, Rimner A, Simone CB, Cho BCJ, de Perrot M, Adjei AA, Bueno R, Gill RR, Harpole DH, Hesdorffer M, Hirsch FR, Jackson AA, Pass HI, Rice DC, Rusch VW, Tsao AS, Yorke E, Rosenzweig K. The Use of Radiation Therapy for the Treatment of Malignant Pleural Mesothelioma: Expert Opinion from the National Cancer Institute Thoracic Malignancy Steering Committee, International Association for the Study of Lung Cancer, and Mesothelioma Applied Research Foundation. J Thorac Oncol 2019; 14:1172-1183. [PMID: 31125736 DOI: 10.1016/j.jtho.2019.03.030] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 03/28/2019] [Accepted: 03/28/2019] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Detailed guidelines regarding the use of radiation therapy for malignant pleural mesothelioma (MPM) are currently lacking because of the rarity of the disease, the wide spectrum of clinical presentations, and the paucity of high-level data on individual treatment approaches. METHODS In March 2017, a multidisciplinary meeting of mesothelioma experts was cosponsored by the U.S. National Cancer Institute, International Association for the Study of Lung Cancer Research, and Mesothelioma Applied Research Foundation. Among the outcomes of this conference was the foundation of detailed, multidisciplinary consensus guidelines. RESULTS Here we present consensus recommendations on the use of radiation therapy for MPM in three discrete scenarios: (1) hemithoracic radiation therapy to be used before or after extrapleural pneumonectomy; (2) hemithoracic radiation to be used as an adjuvant to lung-sparing procedures (i.e., without pneumonectomy); and (3) palliative radiation therapy for focal symptoms caused by the disease. We discuss appropriate simulation techniques, treatment volumes, dose fractionation regimens, and normal tissue constraints. We also assess the role of particle beam therapy, specifically, proton beam therapy, for MPM. CONCLUSION The recommendations provided in this consensus statement should serve as important guidelines for developing future clinical trials of treatment approaches for MPM.
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Affiliation(s)
- Daniel R Gomez
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, New York.
| | - Andreas Rimner
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Charles B Simone
- Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, Maryland
| | - B C John Cho
- Cancer Clinical Research Unit, Princess Margaret Cancer Centre, Toronto, Ontario, Canada
| | - Marc de Perrot
- Cancer Clinical Research Unit, Princess Margaret Cancer Centre, Toronto, Ontario, Canada
| | - Alex A Adjei
- Department of Oncology, Mayo Clinic, Rochester, Minnesota
| | - Raphael Bueno
- Division of Thoracic Surgery, Brigham and Women's Hospital, Boston, Massachusetts
| | - Ritu R Gill
- Department of Radiology, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - David H Harpole
- Department of Surgery, Duke University School of Medicine, Durham, North Carolina
| | | | - Fred R Hirsch
- Department of Medicine, University of Colorado, Denver, Colorado; Department of Pathology, University of Colorado, Denver, Colorado
| | | | - Harvey I Pass
- Department of Cardiothoracic Surgery, New York University School of Medicine, New York, New York
| | - David C Rice
- Department of Thoracic and Cardiovascular Surgery, The University of Texas M. D. Anderson Cancer Center, Houston, Texas
| | - Valerie W Rusch
- Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Anne S Tsao
- Department of Thoracic/Head and Neck Medical Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas
| | - Ellen Yorke
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Kenneth Rosenzweig
- Department of Radiation Oncology, Mount Sinai School of Medicine, New York, New York
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Gomez D, Tsao AS. Local and systemic therapies for malignant pleural mesothelioma. Curr Treat Options Oncol 2015; 15:683-99. [PMID: 25266654 DOI: 10.1007/s11864-014-0314-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OPINION STATEMENT Malignant pleural mesothelioma (MPM) is a challenging disease to treat with median overall survival times ranging between 9-17 months for all stages of disease. Recent clinical trials have improved our understanding of the biology of MPM. However, survival results are still not ideal. For early-stage MPM, patients should be evaluated for trimodality therapy in an experienced cancer center. If treating off-protocol, MPM patients should receive a surgical staging evaluation. The decision to proceed with surgical resection also should be considered after an extensive and thorough pulmonary and cardiac evaluation. If deemed a good surgical candidate, patients should receive surgical resection (pleurectomy/decortication or extrapleural pneumonectomy), adjuvant radiation therapy (hemithoracic external beam or intensity modulated radiation therapy), and either neoadjuvant or adjuvant chemotherapy (cisplatin-pemetrexed for 4 cycles). The optimal precise sequence of the trimodality is unclear and should be decided upon by a multidisciplinary consensus for each individual patient. In general, clinical trial participation should be encouraged. Several trials are currently underway to examine intraoperative therapies, vaccines, immunotherapy additions, and novel radiation therapy techniques. Advances in the field of MPM are reliant on participation in clinical trials and identifying biomarkers that are predictive for response to systemic therapies and prognostic for survival benefit.
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Affiliation(s)
- Daniel Gomez
- Department of Thoracic Radiation Oncology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX, 77030, USA
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Gomez DR, Hong DS, Allen PK, Welsh JS, Mehran RJ, Tsao AS, Liao Z, Bilton SD, Komaki R, Rice DC. Patterns of failure, toxicity, and survival after extrapleural pneumonectomy and hemithoracic intensity-modulated radiation therapy for malignant pleural mesothelioma. J Thorac Oncol 2013; 8:238-45. [PMID: 23247629 DOI: 10.1097/jto.0b013e31827740f0] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
INTRODUCTION We investigated safety, efficacy, and recurrence after postoperative hemithoracic intensity-modulated radiation therapy (IMRT) in patients with malignant pleural mesothelioma treated with extrapleural pneumonectomy (EPP), during the past decade at a single institution. METHODS In 2001-2011, 136 consecutive patients with malignant pleural mesothelioma underwent EPP with planned adjuvant IMRT. Eighty-six patients (64%) underwent hemithoracic IMRT; the rest were not eligible because of postoperative complications, disease progression, or poor performance status. We assessed toxicity, survival, and patterns of failure in these 86 patients. Toxicity was scored with the Common Terminology Criteria for Adverse Events version 4.0; survival outcomes were estimated with the Kaplan-Meier method; and locoregional patterns of failure were classified as in-field, marginal, or out-of-field. Risk factors related to survival were identified by univariate and multivariate Cox regression analysis. RESULTS Median overall survival time for all 86 patients receiving IMRT was 14.7 months. Toxicity rates of grade of 3 or more were: skin 17%, lung 12%, heart 2.3%, and gastrointestinal toxicity 16%. Five patients experienced grade 5 pulmonary toxicity. Rates of locoregional recurrence-free survival, distant metastasis-free survival, and overall survival (OS) were 88%, 55%, and 55% at 1 year and 71%, 40%, and 32% at 2 years. On multivariate analysis, pretreatment forced expiratory volume in 1 second, nonepithelioid histology, and nodal status were associated with distant metastasis-free survival and OS. CONCLUSION IMRT after EPP is associated with low rates of locoregional recurrence, though some patients experience life-threatening lung toxicity. Tumor histology and nodal status can be helpful in identifying patients for this aggressive treatment.
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Affiliation(s)
- Daniel R Gomez
- Department of Radiation Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas 77054, USA.
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Ebara T, Kawamura H, Kaminuma T, Okamoto M, Yoshida D, Okubo Y, Takahashi T, Kobayashi K, Sakaguchi H, Ando Y, Nakano T. Hemithoracic intensity-modulated radiotherapy using helical tomotherapy for patients after extrapleural pneumonectomy for malignant pleural mesothelioma. JOURNAL OF RADIATION RESEARCH 2012; 53:288-294. [PMID: 22374401 DOI: 10.1269/jrr.11130] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Postoperative hemithoracic irradiation is regarded as an important part of the curative treatment for resectable malignant pleural mesothelioma (MPM). Because the clinical target volume in postoperative MPM is irregular and surrounded by dose-limiting critical structures, intensity-modulated radiation therapy (IMRT) is thought to be suitable. However, postoperative hemithoracic IMRT remains experimental due to a high incidence of fatal pneumonitis. Therefore, a Phase I dose escalation study for hemithoracic IMRT using helical tomotherapy was planned, and the results of the first three patients are herein reported because this technique may provide benefits to such patients. For 3 patients with postoperative MPM, who were treated by extrapleural pneumonectomy (EPP), a radiation dose of 45.0 Gy in 25 fractions was given to cover 95% of the PTV. The lung V5s of the three patients were 14.3%, 10.0%, and 31.3%, respectively. The V5s of the present plans was smaller than that of the recent IMRT planning studies. The lung V20s of these patients were 2.4%, 2.2%, and 4.3%, respectively. Their MLDs were 4.3 Gy, 3.4 Gy, and 5.8 Gy, respectively. The follow-up periods of the patients were 26, 14 and 9 months from initiation of IMRT, respectively. All patients were alive, although local and contralateral recurrences had developed in 1 patient. Only 1 patient had Grade 2 acute esophagitis and nausea. There was no treatment-related pneumonitis. Hemithoracic IMRT using helical tomotherapy may play a crucial role in adjuvant treatment for MPM after EPP.
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Affiliation(s)
- Takeshi Ebara
- Department of Radiation Oncology, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan.
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Intensity-modulated radiotherapy after extrapleural pneumonectomy in the combined-modality treatment of malignant pleural mesothelioma. J Thorac Oncol 2011; 6:1132-41. [PMID: 21532502 DOI: 10.1097/jto.0b013e3182199819] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
INTRODUCTION Local therapy is becoming increasingly important as a part of the definitive treatment for malignant pleural mesothelioma after extrapleural pneumonectomy (EPP) because of the emergence of trimodality therapy consisted of chemotherapy, EPP, and adjuvant radiotherapy. Herein, we explore the current evidence and indications for adjuvant intensity-modulated radiotherapy (IMRT), as well as how to further improve this technique and adapt new technology in the delivering adjuvant radiotherapy in the setting of trimodality therapy. METHODS A systematic review of relevant studies identified through PubMed, ISI Web of Knowledge (Web of Science), the Cochrane Library, and the National Guideline Clearinghouse search engines was performed. RESULTS Local control remains poor despite the inclusion of conventional adjuvant radiation therapy in trimodality therapy. This can be improved by the delivery of adjuvant IMRT. However, IMRT can be associated with severe pulmonary toxicity if the radiation dose to the remaining lung is not kept to a very low level. This is especially true when patients are receiving chemotherapy. New advances in technology can allow for lower doses to the contralateral lung, decreased treatment delivery time, and improved target dose coverage. CONCLUSION Excellent local control can be achieved through adjuvant IMRT after EPP for malignant pleural mesothelioma. Severe pulmonary toxicity may be avoided by setting stringent dose constraints for the contralateral lung. This can be aided by the advances in technology. Post-treatment surveillance may be reliably conducted by periodical [18F]-fluorodeoxyglucose-positron emission tomography imaging.
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Kristensen CA, Nøttrup TJ, Berthelsen AK, Kjaer-Kristoffersen F, Ravn J, Sørensen JB, Engelholm SA. Pulmonary toxicity following IMRT after extrapleural pneumonectomy for malignant pleural mesothelioma. Radiother Oncol 2009; 92:96-9. [PMID: 19364621 DOI: 10.1016/j.radonc.2009.03.011] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2008] [Revised: 03/08/2009] [Accepted: 03/08/2009] [Indexed: 11/17/2022]
Abstract
BACKGROUND AND PURPOSE The combination of chemotherapy, surgery, and radiotherapy has improved the prognosis for patients with malignant pleural mesothelioma (MPM). Intensity-modulated radiotherapy (IMRT) has allowed for an increase in dose to the pleural cavity and a reduction in radiation doses to organs at risk. The present study reports and analyses the incidence of fatal pulmonary toxicity in patients treated at Rigshospitalet, Copenhagen. MATERIALS AND METHODS Twenty-six patients were treated with induction chemotherapy followed by extrapleural pneumonectomy and IMRT between April 2003 and April 2006. The entire preoperative pleural surface area was treated to 50 Gy and areas with residual disease or close surgical margins were treated to 60 Gy in 30 fractions. RESULTS The main toxicities were nausea, vomiting, esophagitis, dyspnea, and thrombocytopenia. One patient died from an intracranial hemorrhage during severe thrombocytopenia. Four patients (15%) experienced grade 5 lung toxicity, i.e. pneumonitis 19-40 days after the completion of radiotherapy. Patients with pneumonitis had a significantly larger lung volume fraction receiving 10 Gy or more (V10) (median: 60.3%, range 56.4-83.2%) compared to patients without pneumonitis (median: 52.6%, range: 25.6-80.3%) (p=0.02). Mean lung dose (MLD) was also significantly higher in patients who developed pneumonitis (median 13.9 Gy, range: 13.6-14.2 Gy) than in patients who did not (median=12.4 Gy, range: 8.4-15.4 Gy) (p=0.04). CONCLUSIONS Significant differences in MLD and V10 for patients with fatal pulmonary toxicity compared to patients without fatal lung toxicity have been demonstrated. Based on the presented data local lung dose constraints have been modified in order to avoid unacceptable toxicity.
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Jang SY, Liu HH, Mohan R. Underestimation of Low-Dose Radiation in Treatment Planning of Intensity-Modulated Radiotherapy. Int J Radiat Oncol Biol Phys 2008; 71:1537-46. [PMID: 18513883 DOI: 10.1016/j.ijrobp.2008.04.014] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2007] [Revised: 03/26/2008] [Accepted: 04/07/2008] [Indexed: 11/18/2022]
Affiliation(s)
- Si Young Jang
- Department of Radiation Physics, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
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Allen AM, Schofield D, Hacker F, Court LE, Czerminska M. Restricted Field IMRT Dramatically Enhances IMRT Planning for Mesothelioma. Int J Radiat Oncol Biol Phys 2007; 69:1587-92. [PMID: 17892915 DOI: 10.1016/j.ijrobp.2007.06.075] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2007] [Revised: 06/26/2007] [Accepted: 06/29/2007] [Indexed: 11/18/2022]
Abstract
PURPOSE To improve the target coverage and normal tissue sparing of intensity-modulated radiotherapy (IMRT) for mesothelioma after extrapleural pneumonectomy. METHODS AND MATERIALS Thirteen plans from patients previously treated with IMRT for mesothelioma were replanned using a restricted field technique. This technique was novel in two ways. It limited the entrance beams to 200 degrees around the target and three to four beams per case had their field apertures restricted down to the level of the heart or liver to further limit the contralateral lung dose. New constraints were added that included a mean lung dose of <9.5 Gy and volume receiving >or=5 Gy of <55%. RESULTS In all cases, the planning target volume coverage was excellent, with an average of 97% coverage of the planning target volume by the target dose. No change was seen in the target coverage with the new technique. The heart, kidneys, and esophagus were all kept under tolerance in all cases. The average mean lung dose, volume receiving >or=20 Gy, and volume receiving >or=5 Gy with the new technique was 6.6 Gy, 3.0%, and 50.8%, respectively, compared with 13.8 Gy, 15%, and 90% with the previous technique (p < 0.0001 for all three comparisons). The maximal value for any case in the cohort was 8.0 Gy, 7.3%, and 57.5% for the mean lung dose, volume receiving >or=20 Gy, and volume receiving >or=5 Gy, respectively. CONCLUSION Restricted field IMRT provides an improved method to deliver IMRT to a complex target after extrapleural pneumonectomy. An upcoming Phase I trial will provide validation of these results.
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Affiliation(s)
- Aaron M Allen
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
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