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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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