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Shimohigashi Y, Toya R, Saito T, Kono Y, Doi Y, Fukugawa Y, Watakabe T, Matsumoto T, Kai Y, Maruyama M, Oya N. Impact of four-dimensional cone-beam computed tomography on target localization for gastric mucosa-associated lymphoid tissue lymphoma radiotherapy: reducing planning target volume. Radiat Oncol 2021; 16:14. [PMID: 33446225 PMCID: PMC7807891 DOI: 10.1186/s13014-020-01734-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Accepted: 12/17/2020] [Indexed: 12/27/2022] Open
Abstract
Background Radiotherapy of gastric mucosa-associated lymphoid tissue (MALT) lymphoma should be delivered to the entire stomach with planning target volume (PTV) that accounts for variations in stomach volume, respiratory movement, and patient set-up error. In this study, we evaluated whether the use of four-dimensional cone-beam computed tomography (4D-CBCT) reduces the PTV. Methods Eight patients underwent radiotherapy with 15 fractions of gastric MALT lymphoma using 4D-CBCT. PTV structures of 5–30 mm margins (5 mm intervals) from the clinical target volume (CTV) delineated based on the 4D-CT images (CTV-4D) were generated. For the target localization, we performed matching based on skin marking (skin matching), bone anatomy (bone matching), and stomach anatomy (4D soft-tissue matching) based on registration between planning CT and 4D-CBCT images from 10 phases. For each patient, we calculated the covering ratio (CR) of the stomach with variable PTV structures, based on the 4D-CBCT images, with a total of 150 phases [CR (%) = (number of covering phases/150 phases) × 100], for three target localization methods. We compared the CR values of the different target localization methods and defined the PTV with an average CR of ≥ 95% for all patients. Results The average CR for all patients increased from 17.9 to 100%, 19.6 to 99.8%, and 33.8 to 100%, in the skin, bone, and 4D soft-tissue matchings, respectively, as the PTV structures increased from 5 to 30 mm. The CR obtained by 4D soft-tissue matching was superior to that obtained by skin (P = 0.013) and bone matching (P = 0.008) for a PTV structure of 15 mm margin. The PTV required an additional margin of 20 mm (average CR: 95.2%), 25 mm (average CR: 99.1%), and 15 mm (average CR: 98.0%) to CTV-4D for the skin, bone, and 4D soft-tissue matchings, respectively. Conclusions This study demonstrates that the use of 4D-CBCT reduces the PTV when applying 4D soft-tissue matching, compared to skin and bone matchings. Additionally, bone matching does not reduce the PTV as compared with traditional skin matching.
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Affiliation(s)
- Yoshinobu Shimohigashi
- Department of Radiological Technology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan.
| | - Ryo Toya
- Department of Radiation Oncology, Kumamoto University Hospital, Kumamoto, Japan
| | - Tetsuo Saito
- Department of Radiation Oncology, Kumamoto University Hospital, Kumamoto, Japan
| | - Yumiko Kono
- Department of Radiological Technology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yasuhiro Doi
- Department of Radiological Technology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yoshiyuki Fukugawa
- Department of Radiation Oncology, Kumamoto University Hospital, Kumamoto, Japan
| | - Takahiro Watakabe
- Department of Radiation Oncology, Kumamoto University Hospital, Kumamoto, Japan
| | - Tadashi Matsumoto
- Department of Radiation Oncology, Kumamoto University Hospital, Kumamoto, Japan
| | - Yudai Kai
- Department of Radiological Technology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Masato Maruyama
- Department of Radiological Technology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Natsuo Oya
- Department of Radiation Oncology, Kumamoto University Hospital, Kumamoto, Japan
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Uchinami Y, Suzuki R, Katoh N, Taguchi H, Yasuda K, Miyamoto N, Ito YM, Shimizu S, Shirato H. Impact of organ motion on volumetric and dosimetric parameters in stomach lymphomas treated with intensity-modulated radiotherapy. J Appl Clin Med Phys 2019; 20:78-86. [PMID: 31400082 PMCID: PMC6698764 DOI: 10.1002/acm2.12681] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 04/30/2019] [Accepted: 06/20/2019] [Indexed: 12/31/2022] Open
Abstract
Purpose Interplay effects may influence dose distributions to a moving target when using dynamic delivery techniques such as intensity‐modulated radiotherapy (IMRT). The aim of this study was to evaluate the impact of organ motion on volumetric and dosimetric parameters in stomach lymphomas treated with IMRT. Methods Ten patients who had been treated with IMRT for stomach lymphomas were enrolled. The clinical target volume (CTV) was contoured as the whole stomach. Considering interfractional uncertainty, the internal target volume (ITV) margin was uniformly 1.5 cm to the CTV and then modified based on the 4DCT images in case of the large respiratory motion. The planning target volume (PTV) was created by adding 5 mm to the ITV. The impact of organ motion on the volumetric and dosimetric parameters was evaluated retrospectively (4D simulation). The organ motion was reproduced by shifting the isocenter on the radiation treatment planning system. Several simulation plans were created to test the influence of the beam‐on timing in the respiration cycle on the dose distribution. The homogeneity index (HI), volume percentage of stomach covered by the prescribed dose (Vp), and D99 of the CTV were evaluated. Results The organ motion was the largest in the superior‐inferior direction (10.1 ± 4.5 mm [average ± SD]). Stomach volume in each respiratory phase compared to the mean volume varied approximately within a ± 5% range in most of the patients. The PTV margin was sufficiently large to cover the CTV during the IMRT. There was a significant reduction in Vp and D99 but not in HI in the 4D simulation in free‐breathing and multiple fractions compared to the clinically‐used plan (P < 0.05) suggesting that interplay effects deteriorate the dose distribution. The absolute difference of D99 was less than 1% of the prescribed dose. Conclusions There were significant interplay effects affecting the dose distribution in stomach IMRT. The magnitude of the dose reduction was small when patients were treated on free‐breathing and multiple fractions.
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Affiliation(s)
- Yusuke Uchinami
- Department of Radiation Oncology, Hokkaido University Hospital, Sapporo, Japan
| | - Ryusuke Suzuki
- Department of Radiation Oncology, Hokkaido University Hospital, Sapporo, Japan
| | - Norio Katoh
- Global Station for Quantum Medical Science and Engineering, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Sapporo, Japan.,Department of Radiation Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Hiroshi Taguchi
- Department of Radiation Oncology, Hokkaido University Hospital, Sapporo, Japan.,Global Station for Quantum Medical Science and Engineering, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Sapporo, Japan
| | - Koichi Yasuda
- Department of Radiation Oncology, Hokkaido University Hospital, Sapporo, Japan.,Global Station for Quantum Medical Science and Engineering, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Sapporo, Japan
| | - Naoki Miyamoto
- Department of Radiation Oncology, Hokkaido University Hospital, Sapporo, Japan.,Global Station for Quantum Medical Science and Engineering, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Sapporo, Japan
| | - Yoichi M Ito
- Department of Statistical Data Science, The Institute of Statistical Mathematics, Tokyo, Japan
| | - Shinichi Shimizu
- Global Station for Quantum Medical Science and Engineering, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Sapporo, Japan.,Department of Radiation Medical Science and Engineering, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Hiroki Shirato
- Global Station for Quantum Medical Science and Engineering, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University, Sapporo, Japan.,Department of Radiation Medicine, Faculty of Medicine, Hokkaido University, Sapporo, Japan
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Choi SH, Park SH, Lee JJB, Baek JG, Kim JS, Yoon HI. Combining deep-inspiration breath hold and intensity-modulated radiotherapy for gastric mucosa-associated lymphoid tissue lymphoma: Dosimetric evaluation using comprehensive plan quality indices. Radiat Oncol 2019; 14:59. [PMID: 30961618 PMCID: PMC6454700 DOI: 10.1186/s13014-019-1263-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 03/27/2019] [Indexed: 12/16/2022] Open
Abstract
Background Although there have been many attempts to increase the therapeutic ratio of radiotherapy for gastric mucosa-associated lymphoid tissue lymphoma (MALToma), only a few planning studies have reported the efficacy of the modern radiotherapy technique till date. Therefore, we performed the dosimetric comparison among 3-dimensional conformal radiotherapy (3D-CRT) and intensity-modulated radiotherapy (IMRT) plans, using deep-inspiration breath hold (DIBH) or free-breathing (FB) techniques, to determine the most optimal plan for gastric MALToma. Methods We evaluated 9 patients with gastric MALToma for whom 3D-CRT, step-and-shoot IMRT (SIMRT), volumetric-modulated arc therapy (VMAT), and tomotherapy plans with identical prescribed doses were generated using DIBH or FB computed tomography (CT). Planning target volume (PTV) coverage and non-target doses were calculated for each plan and compared with plan quality metric (PQM) scores. Results All 72 plans of 9 patients satisfied our dosimetric goals, and the IMRT plans and 3D-CRT plans had similarly good conformity index values with no differences related to respiratory movement. IMRT plans yielded significantly better doses to the organs-at-risk, and DIBH plans yielded significantly lower liver, heart, and lung Dmean and spinal cord Dmax with smaller irradiated volumes compared to FB plans. For the mean PQM scores, VMAT-DIBH and SIMRT-DIBH yielded the best scores, whereas 3D plans provided reduced beam monitor unit values. Conclusion Our findings demonstrate that modern RT technologies (DIBH with VMAT or SIMRT) could potentially provide excellent target coverage for gastric MALToma while reducing doses to organs-at-risk. However, the relevance of the most optimal plan considering clinical outcomes should be confirmed further in a larger patient cohort. Electronic supplementary material The online version of this article (10.1186/s13014-019-1263-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Seo Hee Choi
- Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - So Hyun Park
- Department of Radiation Oncology, Jeju National University Hospital, Jeju University College of Medicine, Jeju, South Korea
| | - Jason Joon Bock Lee
- Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Jong Geol Baek
- Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Jin Sung Kim
- Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea.
| | - Hong In Yoon
- Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea.
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Reinartz G, Pyra RP, Lenz G, Liersch R, Stüben G, Micke O, Willborn K, Hess CF, Probst A, Fietkau R, Jany R, Schultze J, Rübe C, Hirt C, Fischbach W, Bentz M, Daum S, Pott C, Tiemann M, Möller P, Neubauer A, Wilhelm M, Willich N, Berdel WE, Eich HT. Favorable radiation field decrease in gastric marginal zone lymphoma : Experience of the German Study Group on Gastrointestinal Lymphoma (DSGL). Strahlenther Onkol 2019; 195:544-557. [PMID: 30859254 DOI: 10.1007/s00066-019-01446-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 02/15/2019] [Indexed: 12/12/2022]
Abstract
PURPOSE Long-term impact of stage-adapted field reduction in a large cohort of gastric marginal zone lymphoma (gMZL) patients treated conservatively with curative radiation therapy (RT). PATIENTS AND METHODS Prospective analysis of paper records of 290 patients with stage IE-IIE gMZL, treated in 78 radiotherapeutic institutions in Germany from 1992-2013. Stage-adapted radiation fields decreased from extended field (EF) to involved field (IF) over the course of three consecutive prospective trials of the German Study Group on Gastrointestinal Lymphoma (DSGL). Treatment results were compared between the three cohorts. RESULTS Overall collective with median age of 60 years, slight male predominance (m:f = 1.1:1) and ratio of disease stage I:stage II = 2.1:1. Median follow-up 6.4 years in total: 13.0 years in the first gastrointestinal study (GIT 1992), 8.2 years in the second (GIT 1996) and 4.7 years in the third study (DSGL 01/2003). Stage-adapted radiation field decrease together with further technological development led to reduced relative frequencies of acute/chronic adverse effects and until now was accompanied by lower disease recurrence. The third study design with smallest field size (IF in stage I, locoregional EF in stage II) achieved the best survival outcome at the 5‑year follow-up (overall survival 92.7%, event-free survival 89.5% and lymphoma-specific survival 100.0%). Disease relapse observed in 10 patients. Cumulative incidence of disease-specific death was 1.7% of the followed patients. Primary disease stage associated with lymphoma-specific survival. CONCLUSION Stage-adapted reduction towards IF in gMZL resulted in favorable adverse effects, local control and survival rates. These results support further decreases in modern RT of gMZL.
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Affiliation(s)
- Gabriele Reinartz
- Department of Radiation Oncology, University Hospital of Münster, Building A1, Albert Schweitzer Campus 1, 48149, Münster, Germany.
| | - Regina P Pyra
- Department of Radiation Oncology, University Hospital of Münster, Building A1, Albert Schweitzer Campus 1, 48149, Münster, Germany
| | - Georg Lenz
- Department of Medicine A, Hematology, Oncology and Pneumology, University Hospital of Münster, Münster, Germany
| | - Rüdiger Liersch
- Department of Medicine A, Hematology, Oncology and Pneumology, University Hospital of Münster, Münster, Germany
| | - Georg Stüben
- Department of Radiation Oncology, Hospital Augsburg, Augsburg, Germany
| | - Oliver Micke
- Department of Radiotherapy and Radiation Oncology, Franziskus Hospital Bielefeld, Bielefeld, Germany
| | - Kay Willborn
- Department of Radiotherapy and Radiation Oncology, Pius Hospital Oldenburg, Oldenburg, Germany
| | - Clemens F Hess
- Department of Radiation Oncology, University Hospital of Göttingen, Göttingen, Germany
| | - Andreas Probst
- Department of Gastroenterology, Central Hospital, Augsburg, Germany
| | - Rainer Fietkau
- Department of Radiation Oncology, University of Erlangen, Erlangen, Germany
| | - Ralf Jany
- Department of Radiation Oncology, Saint Marien Hospital, Hamm, Germany
| | - Jürgen Schultze
- Department of Radiation Oncology, University of Schleswig-Holstein, Kiel, Germany
| | - Christian Rübe
- Department of Radiation Oncology, University of Saarland, Homburg, Germany
| | - Carsten Hirt
- Department of Medical Oncology, University of Greifswald, Greifswald, Germany
| | - Wolfgang Fischbach
- Department of Gastroenterology and Oncology, Hospital of Aschaffenburg, Aschaffenburg, Germany
| | - Martin Bentz
- Department of Medical Oncology, Municipal Hospital of Karlsruhe, Karlsruhe, Germany
| | - Severin Daum
- Department of Gastroenterology, University Charité, Berlin, Germany
| | - Christiane Pott
- Department of Medical Oncology, University of Schleswig-Holstein, Kiel, Germany
| | | | - Peter Möller
- Department of Pathology, University of Ulm, Ulm, Germany
| | - Andreas Neubauer
- Department of Medical Oncology, University of Marburg, Marburg, Germany
| | - Martin Wilhelm
- Department of Medical Oncology, Klinikum Nürnberg, Paracelsus Medical University, Nürnberg, Germany
| | - Normann Willich
- Department of Radiation Oncology, University Hospital of Münster, Building A1, Albert Schweitzer Campus 1, 48149, Münster, Germany
| | - Wolfgang E Berdel
- Department of Medicine A, Hematology, Oncology and Pneumology, University Hospital of Münster, Münster, Germany
| | - Hans T Eich
- Department of Radiation Oncology, University Hospital of Münster, Building A1, Albert Schweitzer Campus 1, 48149, Münster, Germany
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Chung JH, Na K, Kim IH. Benefit of volumetric-modulated arc therapy over three-dimensional conformal radiotherapy for stage I-II extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue in the stomach: a dosimetric comparison. Radiat Oncol J 2018; 36:332-340. [PMID: 30630272 PMCID: PMC6361246 DOI: 10.3857/roj.2018.00402] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 11/27/2018] [Indexed: 12/12/2022] Open
Abstract
Purpose To retrospectively analyze dosimetric parameters of volumetric-modulated arc therapy (VMAT) and three-dimensional conformal radiotherapy (3D-CRT) delivered to extranodal marginal zone B-cell lymphomas of mucosa-associated lymphoid tissue in the stomach (gastric MALT lymphoma) to find out advantages of VMAT and conditions for definite benefits of VMAT. Materials and Methods Fifty patients with stage I-II gastric MALT lymphoma received VMAT (n = 14) or 3D-CRT (n = 36) between December 2005 and April 2018. Twenty-seven patients were categorized according to whether the planning target volume (PTV) overlaps kidney(s). Dosimetric parameters were analyzed by dose-volume histogram. Results Radiation dose to the liver was definitely lower with VMAT in terms of mean dose (p = 0.026) and V15 (p = 0.008). The V15 of the left kidney was lower with VMAT (p = 0.065). For those with PTV overlapping kidney(s), the left kidney V15 was significantly lower with VMAT. Furthermore, the closer the distance between the PTV and kidneys, the less the left kidney V15 with VMAT (p = 0.037). Delineation of kidney(s) by integrating all respiratory phases had no additional benefit. conclusions VMAT significantly increased monitor units, reduced treatment time and radiation dose to the liver and kidneys. The benefit of VMAT was definite in reducing the left kidney V15, especially in geometrically challenging conditions of overlap or close separation between PTV and kidney(s).
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Affiliation(s)
- Joo-Hyun Chung
- Department of Radiation Oncology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Kyoungsu Na
- Department of Radiation Oncology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Il Han Kim
- Department of Radiation Oncology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.,Cancer Research Institute, Seoul National University, Seoul, Korea
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Avilés A, Nambo MJ, Neri N. Primary gastric diffuse large B-cell lymphoma: The role of dose-dense chemotherapy. J Oncol Pharm Pract 2018; 25:1682-1686. [PMID: 30370804 DOI: 10.1177/1078155218809458] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To assess if the use of a dose-dense regimen of chemotherapy can improve the prognosis in patients with primary gastric diffuse large B-cell lymphoma in early stages (I-II) but associated with worse prognostic factors. METHODS One hundred and eight consecutive patients with primary gastric diffuse large B-cell lymphoma in early stages (I-II) with high serum levels of lactic dehydrogenase and beta 2 microglobulin (more than >2 of normal levels), which were associated with a worse prognostic outcome, were treated with a dose-dense chemotherapy: CHOP with increased doses of cyclophosphamide and doxorubicin, was administered every 14 days (instead of 21 days). The end points of this study were to improve outcome measured from progression-free survival and overall survival and to evaluate acute toxicities. RESULTS Complete response was achieved in 85 patients (78%). Actuarial curves at five years show that progression-free survival was 82% and overall survival was 85%. Hematological toxicities were severe, but no death-related treatment was observed. CONCLUSIONS We considered that in this setting of patients, the use of a dose-dense regimen could be of benefit because it improves outcome and toxicities were well controlled.
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Affiliation(s)
- Agustin Avilés
- 1 Oncology Research Unit, National Medical Center, México D.F., Mexico
| | - Maria-Jesus Nambo
- 2 Department of Hematology, National Medical Center, México D.F., Mexico
| | - Natividad Neri
- 2 Department of Hematology, National Medical Center, México D.F., Mexico
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Toya R, Saito T, Shimohigashi Y, Yotsuji Y, Matsuyama T, Watakabe T, Kai Y, Yamashita Y, Oya N. Four-dimensional cone-beam computed tomography-guided radiotherapy for gastric lymphoma. Jpn J Radiol 2017; 36:159-163. [PMID: 29086348 DOI: 10.1007/s11604-017-0698-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 10/20/2017] [Indexed: 12/11/2022]
Abstract
PURPOSE We describe a treatment method with four-dimensional cone-beam computed tomography (4D-CBCT)-guided radiotherapy for gastric lymphoma. MATERIALS AND METHODS We performed image-guided radiotherapy (IGRT) with 15 fractions for a gastric mucosa-associated lymphoid tissue lymphoma patient, using 4D-CBCT. The stomach was delineated based on 4D-CT images. For image guidance, an automatic registration between planning CT and 4D-CBCT images was performed based on the bony anatomy (bone matching), followed by manual registration based on the stomach in 4D-CBCT images of all 10 phases (4D matching). We calculated the covering ratio (CR) with variable stomach-to-planning target volume (PTV) margins, based on the images of all phases [CR (%) = the number of covering phases/all 150 phases × 100]. RESULTS The patient underwent radiotherapy (RT) as scheduled, without any significant adverse effects. The appropriate PTV margins (CR ≥ 95%) were 25 mm (CR 99.3%) and 15 mm (CR 98.7%) for bone and 4D matching, respectively. CONCLUSION 4D matching using 4D-CBCT is appropriate for IGRT of gastric lymphomas.
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Affiliation(s)
- Ryo Toya
- Department of Radiation Oncology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan.
| | - Tetsuo Saito
- Department of Radiation Oncology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | | | - Yohei Yotsuji
- Department of Radiological Technology, Kumamoto University Hospital, Kumamoto, Japan
| | - Tomohiko Matsuyama
- Department of Radiation Oncology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Takahiro Watakabe
- Department of Radiation Oncology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yudai Kai
- Department of Radiological Technology, Kumamoto University Hospital, Kumamoto, Japan
| | - Yasuyuki Yamashita
- Department of Diagnostic Radiology, Kumamoto University Hospital, Kumamoto, Japan
| | - Natsuo Oya
- Department of Radiation Oncology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
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8
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Liu X, Fang H, Tian Y, Wang WH, Song YW, Wang SL, Liu YP, He XH, Dong M, Ren H, Jin J, Li YX. Intensity Modulated Radiation Therapy for Early-Stage Primary Gastric Diffuse Large B-Cell Lymphoma: Dosimetric Analysis, Clinical Outcome, and Quality of Life. Int J Radiat Oncol Biol Phys 2016; 95:712-20. [DOI: 10.1016/j.ijrobp.2016.01.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 01/12/2016] [Accepted: 01/18/2016] [Indexed: 11/29/2022]
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