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Vu N, Onishi H, Saito M, Kuriyama K, Komiyama T, Marino K, Araya M, Aoki S, Saito R, Nonaka H, Funayama S, Watanabe H, Sano N. Tumor volume shrinkage during stereotactic body radiotherapy is related to better prognoses in patients with stage I non-small-cell lung cancer. JOURNAL OF RADIATION RESEARCH 2020; 61:740-746. [PMID: 32657333 PMCID: PMC7482165 DOI: 10.1093/jrr/rraa040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 05/24/2020] [Indexed: 06/11/2023]
Abstract
The purpose of the study was to investigate the association between tumor volume changes during stereotactic body radiation therapy (SBRT) and prognoses in stage I non-small-cell lung cancer (NSCLC). This retrospective review included stage I NSCLC patients in whom SBRT was performed at a total dose of 48.0-50.5 Gy in four or five fractions. The tumor volumes observed on computed tomography (CT) simulation and on the CT performed at the last treatment session using a CT-on-rails system were measured and compared. Then, the tumor volume changes during the SBRT period were measured and assessed for their association with prognoses (overall survival, local control, lymph node metastases and distant metastases). A total of 98 patients with a mean age of 78.6 years were enrolled in the study. The T-stage was T1a in 42%, T1b in 32% and T2a in 26% of the cases. The gross tumor volume (GTV) shrank and increased ≥10% in 23 (23.5%) and 36 (36.7%) of the cases, respectively. The 5-year local control and overall survival rates in the groups with a tumor shrinkage of ≥10% vs the group with a shrinkage of <10% were 94.7 vs 70.8% and 85.4 vs 47.6%, respectively; these differences were significant, with a P-value < 0.05. During a short SBRT period, the tumor shrank or enlarged in a small number of cases. A decrease of ≥10% in the GTV during SBRT was significantly related to better overall survival and local control.
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Affiliation(s)
- Nam Vu
- Department of Radiology, University of Yamanashi, Yamanashi, Japan
- Department of Radiology, Hospital 175, Ho Chi Minh, Vietnam
| | - Hiroshi Onishi
- Department of Radiology, University of Yamanashi, Yamanashi, Japan
| | - Masahide Saito
- Department of Radiology, University of Yamanashi, Yamanashi, Japan
| | - Kengo Kuriyama
- Department of Radiology, University of Yamanashi, Yamanashi, Japan
| | | | - Kan Marino
- Department of Radiology, University of Yamanashi, Yamanashi, Japan
| | | | - Shinichi Aoki
- Department of Radiology, University of Yamanashi, Yamanashi, Japan
| | - Ryo Saito
- Department of Radiology, University of Yamanashi, Yamanashi, Japan
| | - Hotaka Nonaka
- Department of Radiology, University of Yamanashi, Yamanashi, Japan
| | - Satoshi Funayama
- Department of Radiology, University of Yamanashi, Yamanashi, Japan
| | - Hiroaki Watanabe
- Department of Radiology, University of Yamanashi, Yamanashi, Japan
| | - Naoki Sano
- Department of Radiology, University of Yamanashi, Yamanashi, Japan
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Price A, Chen J, Chao E, Schnarr E, Schreiber E, Lu L, Cox A, Chang S, Lian J. Compensation of intrafractional motion for lung stereotactic body radiotherapy (SBRT) on helical TomoTherapy. Biomed Phys Eng Express 2019. [DOI: 10.1088/2057-1976/ab059e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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