Preliminary Results of Stereotactic Radiosurgery Using Stereotactic Body Frame

Ahn, Seung Do; Yi, Byong Yong; Choi, Eun Kyung; Kim, Jong Hoo; Nho, Young Ju; Shin, Kyung Hwan; Kim, Kyoung Ju; Chung, Won Kyun; Chang, Hyesook

Abstract

PURPOSE
To evaluate efficacy and complication of stereotactic radiosurgery using stereotactic body frame.
METHODS
AND MATERIALS: From December 1997 to June 1999, 11 patients with primary and metastatic tumors were treated with stereotactic radiosurgery using stereotactic body frame(Precision Therapy(TM)). Three patients were treated with primary hepatoma and seven with metastatic tumor from liver, lung, breast, trachea and one with arteriovenous malformation on neck. We used vacuum pillow for immobilization and made skin marker on sternum and tibia area with chest marker and leg marker. Diaphragm control was used for reducing movement by respiration. CT-simulation and treatment planning were performed. Set-up error was checked by CT-Simulator before each treatment. Dose were calculated on the 80~90% isodose of isocenter dose and given consecutive 3 fractions for total dose of 30 Gy (10 Gy/fraction).
RESULTS
Median follow-up was 12 months. One patient (9%) showed complete response and four patients (36%) showed partial response and others showed stable disease. Planning target volumes (PTV) ranged from 3 to 111 cc (mean 18.4 cc). Set-up error was within 5 mm in all directions (X, Y, Z axis). There was no complication in all patients.
CONCLUSION
In primary and metastatic tumors, stereotactic radiosurgery using stereotactic body frame is very safe, accurate and effective treatment modality.