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  4. The diagnostic value of computer-assisted post-processing technique of CT colonography for patients with colorectal cancer
 
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The diagnostic value of computer-assisted post-processing technique of CT colonography for patients with colorectal cancer

Journal
Chinese Journal of Radiology
Journal Volume
29
Journal Issue
2
Pages
53-60
Date Issued
2004
Author(s)
CHIH-WEI YU  
Ku Y.-K.
CHUNG-WEI LEE  
Tsang Y.-M.
Hsu J.C.-Y.
Wei T.-C.
Wang T.-H.
Weng C.-W.
URI
https://scholars.lib.ntu.edu.tw/handle/123456789/509449
Abstract
To evaluate the respective diagnostic value of computer-assisted post-processing applications in computed tomographic (CT) colonography for patients with colorectal cancer. Thirty four patients with colorectal cancer diagnosed by conventional colonoscopy and/or barium enema examination underwent CT colonography prior to operation. These data were all acquired from a spiral CT scanner and were sent to a separate workstation for further evaluation. Four post-processing applications of volume rendering techniques including Multi-planar Reconstruction (MPR), Quick_colon, CutPlane_colon, and Fly-through Navigation were evaluated. The diagnostic performance of each application in localization, extraserosal invasion, regional lymph node involvement, and surface characterization was analyzed by a subjective grading score. Each of the volume rendering techniques had respective value preoperatively in different ways: MPR application clearly demonstrated the whole extent of the lesion and it offered additional enhancement pattern and extraserosal information. Fly-through application offered an intraluminal visualization of the lesion simulating conventional colonoscopy. Surface unevenness, luminal constriction, and the fungating nature of the lesion were shown clearly. A colonic fold which could mimic a projecting lesion in axial images could easily be excluded by this technique. Quick_colon application demonstrated the exact spatial location and extent of the lesion from the whole segment of colon simulating conventional double contrast study. CutPlane_colon application slabed a 10 mm thick data into a composite image that offered both two-dimensional (2D) and three-dimensional (3D) information on asingle image. Finally, we found that MPR had the overall highest score in lesion detection and demonstration among these post-processing applications. Among the post-processing applications in CT colonography, MPR is the best in lesion localization and demonstration. Other three applications serve a supplementary role in diagnosis.
SDGs

[SDGs]SDG3

Other Subjects
contrast medium; iopromide; adult; aged; article; barium enema; cancer diagnosis; clinical article; colonoscopy; colorectal cancer; colorectal disease; computed tomographic colonography; computer assisted tomography; contrast enhancement; diagnostic imaging; diagnostic value; female; human; image processing; intermethod comparison; lymph node metastasis; male; preoperative evaluation
Type
journal article
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