MDCTおよびFPD搭載型コーンビームCTを用いた3D画像の基礎的検討 : 特に腹部IVRでの描出について

概要

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Diagnosis by CTHA (CT during hepatic arteriography) and CTAP (CT during arterio-portography) is indispensable in the treatment of hepatocellular carcinoma (HCC). An IVR-CT system makes it possible to perform accurate diagnosis and treatment of HCC in a short period of time. In recent years, attention has been drawn to cone-beam CT (CBCT) using a flat panel detector (FPD) angio-system, and the application of CBCT for CTAP and CTHA has been reported. However, it is well known that CBCT easily generates artifacts on the images, so it is necessary to use CBCT according to the intended purpose. The purpose of this study was to evaluate 3-D images reconstructed by MDCT or CBCT, image noise, and low-contrast resolution in a phantom with a tumor mimic model. From our results, CBCT images showed distortion and blurring, and it was difficult to visualize a tumor model of 7 mm or less. In addition CBCT can create only a small area of 3-D vascular mapping. In conclusion, it is considered that CBCT cannot be used in place of conventional CTHA or CTA for the treatment of HCC.
2009-06-20