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¿µ³²ÀÇ´ëÇмúÁö Vol.24_No.2 Suppl. P.S591-597, Dec. 2007

Original Article

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

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Tel: (054) 840-0065, Fax: (054) 840-0115
E-mail: soshin@ynu.ac.kr

December 30, 2007

Abstract

Background£ºThis study was performed to test feasibility of CBCT(cone-beam computerized tomography) guided radiosurgery.
Materials and Methods£ºWe used CBCT which was mounted on a retractable arm at 90¡Æ 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£ºA 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£ºCBCT 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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