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Temporal and Multiinstitutional Quality Assessment of CT Colonography

Robert L. Van Uitert1, Ronald M. Summers1, Jacob M. White1, Keshav K. Deshpande1, J. Richard Choi2,3 and Perry J. Pickhardt4

1 Radiology and Imaging Sciences, National Institutes of Health Clinical Center, Bldg. 10, Rm. 1C368X MSC 1182, Bethesda, MD 20892-1182.
2 Department of Radiology, Walter Reed Army Medical Center, Washington, DC.
3 Department of Radiology, Uniformed Services University of the Health Sciences, Bethesda, MD.
4 Department of Radiology, University of Wisconsin Medical School, Madison, WI.


Figure 1
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  		Fig. 1A —Anteroposterior surface reconstructed views of colon from CT colonography (CTC) show representative distention scores. Supine CTC image of 69-year-old woman shows poorly distended descending colon with distention score of 11.8%.

 

Figure 2
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  		Fig. 1B —Anteroposterior surface reconstructed views of colon from CT colonography (CTC) show representative distention scores. Prone CTC image of 52-year-old man shows well-distended descending colon with distention score of 95.7%.

 

Figure 3
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  		Fig. 2A —Lateral surface-rendered 3D reconstructions of colon from CT colonography (CTC) show representative fluid levels and automated measurements. Arrows indicate air–fluid boundary. CT scanner table (not shown) is at bottom of image so that fluid is dependent. Prone CTC image of ascending colon of 69-year-old man shows low surface area obscured by fluid, with fluid score of 1.2%.

 

Figure 4
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  		Fig. 2B —Lateral surface-rendered 3D reconstructions of colon from CT colonography (CTC) show representative fluid levels and automated measurements. Arrows indicate air–fluid boundary. CT scanner table (not shown) is at bottom of image so that fluid is dependent. Supine CTC image of ascending colon of 54-year-old man shows high surface area obscured by fluid, with fluid score of 83.1%.

 

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