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영남의대학술지 Vol.24_No.2 Suppl. P.S591-597, Dec. 2007

Original Article

콘빔 CT를 이용한 전이성 뇌암의 영상 유도 방사선수술

Cone-Beam CT Image-Guided Radiosurgery of Brain Metastasis: Technical Note and Clinical Application

신세원, 윤상모*
안동병원 암센터,
영남대학교 의과대학 방사선종양학교실*
책임저자:신세원, 경북 안동시 수상동 574-2, 안동병원암센터
Tel: (054) 840-0065, Fax: (054) 840-0115
E-mail: soshin@ynu.ac.kr

December 30, 2007

Abstract

Background:This study was performed to test feasibility of CBCT(cone-beam computerized tomography) guided radiosurgery.
Materials and Methods:We used CBCT which was mounted on a retractable arm at 90° to the treatment source. CBCT images were overlapped on the digitally reconstructed images from simulation CT scan. Then, 3 dimensional volumetric CT image matching was performed. If there were any positioning errors, automated patient re-positioning was done.
Results:A radiosurgery treatment plan was carried out with a set of specially designed multiple non-coplanar arcs. The goal of plan was to deliver single session 18 Gy at periphery of the target. We treated a patient with a solitary brain metastasis from left upper lung cancer. Serial imaging study for treatment response revealed a satisfactory result with no remarkable treatment related side effects.
Conclusion:CBCT image guided radiosurgery system is very simple and could be a convenient image guiding modality for stereotactic radiosurgery or fractionated radiotherapy with an acceptable geometric accuracy and radiation exposure.

Key Words: Cone-beam computerized tomography, Stereotactic radiosurgery, Brain metastasis

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