BACKGROUND: The objective of the current study was to investigate the effects and the morbidities of single-fraction stereotactic radiation therapy (SRT) for lung tumors. METHODS: A Microtron device was modified to deliver stereotactic irradiation under respiratory gating. Between August 1998 and December 2004, 59 malignant lung tumors (11 primary tumors, 48 metastases) that measured < 40 mm in greatest dimension were treated by single-fraction SRT. Nine tumors received a minimal dose of < 30 grays (Gy), and 50 tumors received a minimal dose of > or = 30 Gy. The macroscopic target volume ranged from 1 cc to 19 cc (mean, 5 cc). RESULTS: The 1-year and 2-year local progression-free rates (LPFRs) were 93% and 78%, respectively. The overall survival rate was 76.5% at 1 year and 41% at 2 years. Local regrowth of the irradiated tumor was a direct cause of death in two patients. Only the minimal radiation dose to the reference target volume tended to have an influence on the LPFR (P = 0.068). The 2-year LPFRs for patients who received irradiation doses of > or = 30 Gy and < 30 Gy were 83% and 52%, respectively. With regard to morbidities, Grade 3 respiratory symptoms (according to the Radiation Therapy Oncology Group/European Organization for Research and Treatment of Cancer late radiation morbidity scoring scheme) were noted in one patient. CONCLUSIONS: The results from the current study suggested that single-fraction SRT was tolerable and was capable of attaining excellent local control in patients who had malignant lung tumors that measured < 4 cm in greatest dimension. (c) 2006 American Cancer Society.
BACKGROUND: The objective of the current study was to investigate the effects and the morbidities of single-fraction stereotactic radiation therapy (SRT) for lung tumors. METHODS: A Microtron device was modified to deliver stereotactic irradiation under respiratory gating. Between August 1998 and December 2004, 59 malignant lung tumors (11 primary tumors, 48 metastases) that measured < 40 mm in greatest dimension were treated by single-fraction SRT. Nine tumors received a minimal dose of < 30 grays (Gy), and 50 tumors received a minimal dose of > or = 30 Gy. The macroscopic target volume ranged from 1 cc to 19 cc (mean, 5 cc). RESULTS: The 1-year and 2-year local progression-free rates (LPFRs) were 93% and 78%, respectively. The overall survival rate was 76.5% at 1 year and 41% at 2 years. Local regrowth of the irradiated tumor was a direct cause of death in two patients. Only the minimal radiation dose to the reference target volume tended to have an influence on the LPFR (P = 0.068). The 2-year LPFRs for patients who received irradiation doses of > or = 30 Gy and < 30 Gy were 83% and 52%, respectively. With regard to morbidities, Grade 3 respiratory symptoms (according to the Radiation Therapy Oncology Group/European Organization for Research and Treatment of Cancer late radiation morbidity scoring scheme) were noted in one patient. CONCLUSIONS: The results from the current study suggested that single-fraction SRT was tolerable and was capable of attaining excellent local control in patients who had malignant lung tumors that measured < 4 cm in greatest dimension. (c) 2006 American Cancer Society.
Authors: Anurag K Singh; Jorge A Gomez-Suescun; Kevin L Stephans; Jeffrey A Bogart; Gregory M Hermann; Lili Tian; Adrienne Groman; Gregory M Videtic Journal: Int J Radiat Oncol Biol Phys Date: 2019-08-22 Impact factor: 7.038
Authors: Hyejoo Kang; Ellen D Yorke; Jie Yang; Chen-Shou Chui; Kenneth E Rosenzweig; Howard I Amols Journal: J Appl Clin Med Phys Date: 2010-06-08 Impact factor: 2.102
Authors: Gregory M M Videtic; Chen Hu; Anurag K Singh; Joe Y Chang; William Parker; Kenneth R Olivier; Steven E Schild; Ritsuko Komaki; James J Urbanic; Robert D Timmerman; Hak Choy Journal: Int J Radiat Oncol Biol Phys Date: 2015-07-17 Impact factor: 7.038