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JYMS : Journal of Yeungnam Medical Science

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Sei-One Shin 1 Article
Cone-Beam CT Image-Guided Radiosurgery of Brain Metastasis : Technical Note and Clinical Application
Sei-One Shin, Sang Mo Yun
Yeungnam Univ J Med. 2007;24(2 Suppl):S591-597.   Published online December 31, 2007
DOI: https://doi.org/10.12701/yujm.2007.24.2S.S591
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AbstractAbstract PDF
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.

JYMS : Journal of Yeungnam Medical Science