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MR Colonography Using Colonic Distention with Air as the Contrast Material

Work in Progress

Martina M. Morrin1, Mary G. Hochman1, Richard J. Farrell2, Helene Marquesuzaa2, Stanley Rosenberg2 and Robert R. Edelman1

1 Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Ave., Boston MA 02215.
2 Department of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston MA 02215.



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  		Fig. 1A. —59-year-old man who presented with rectal bleeding. Axial MR image of air-distended ascending colon acquired using short TE multislice half-Fourier acquisition single-shot turbo spin-echo technique shows 1.5-cm polyp (arrow).

 


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  		Fig. 1B. —59-year-old man who presented with rectal bleeding. Axial MR image viewed with inverted windows reveals polyp (arrow) seen in A.

 


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  		Fig. 1C. —59-year-old man who presented with rectal bleeding. Axial inverted MR image one slice above A reveals small diverticulum (arrow).

 


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  		Fig. 1D. —59-year-old man who presented with rectal bleeding. Endoluminal MR image shows flat 1.5-cm polyp (arrow) adjacent to small diverticulum (arrowhead).

 


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  		Fig. 2A. —55-year-old man who presented with abdominal pain. Coronal MR image of air-distended colon shows excellent image quality, bowel-wall conspicuity, and bowel distention and minimal air-related susceptibility artifact.

 


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  		Fig. 2B. —55-year-old man who presented with abdominal pain. Coronal inverted MR image shows bowel wall conspicuity better than that seen in A.

 

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