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要旨 大腸癌の予後および治療法の選択は深達度と密接に関係している.CT colonographyでは,MDCTの技術革新に伴って,短時間で仮想内視鏡像や仮想注腸像,MPR像といった様々なpost processing imageの作成が可能となった.一方,大腸内視鏡や注腸造影検査においては,これまでに培われたそれぞれの診断基準が存在する.CT colonographyにおける大腸癌の深達度診断においては,得られた様々なpost processing imageに,従来のモダリティで培われた診断基準を用いて,総合的に診断することで的確な深達度診断が可能と考える.
The treatment strategy for CRC(colorectal cancer)depends on the preoperative assessment of disease extension, particularly T stage.
Improved MDCT(multi-detector CT)scanners now allow high-quality 3-D images to be obtained within several seconds, and various kinds of post processing techniques such as endoluminal view imaging,MPR(multi-planar reconstruction)and virtual enema image have become recently available for CTC(CT colonography). Theoretically, conventional diagnostic criteria of colonoscopy and barium enema, can be used to evaluate 3-D images of CTC and it is important to evaluate T staging of colorectal cancer using CTC. CTC can provide important information for the preoperative assessment of T stage in patients with CRC.
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