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KMID : 1164220100220010019
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Journal of Korean Society for Radiotherapeutic Technology
2010 Volume.22 No. 1 p.19 ~ p.24
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Usability of 2D/2D Match for Image Guided Radiotherapy (IGRT) of Prostate Cancer with Fiducial Markers
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Bae Sun-Myeong
Yang Oh-Nam
Song Heung-Kwon
Back Geum-Mun
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Abstract
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Purpose: To study the efficacy of marker match with using kilovoltage (KV) X-ray among multiple image guidance that referring tree fiducial marker in radiation therapy for prostate cancer patients.
Materials and Methods: KV two-dimantional images (anterior-posterior, right-left) and cone-beam CT volumetric images were acquired after setup for patients with three fiducial markers. Compare the position of the fiducial marker of reference plan computed tomography (CT) and of KV, CBCT images; then decide the shift score of X, Y, and Z. This study executed 5 times on 10 patients and analyzed the shift value.
Results: In the radiation therapy using fiducial marker, The function of marker match showed the same direction tendency as the CBCT, and showed X, Y, Z difference of about 0.6, 0.7, and 0.8 (unit: mm).
Conclusion: Comparing to this, the result of shift value using 2D marker match showed less than 1.0 mm difference. The function of marker match is considered more useful in time-wise and effective dose rather than CBCT. Therefore, Both methods are used to treat patients for prostate cancer.
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KEYWORD
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image guided radiation therapy, marker match, fiducial marker
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