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Portable Abdominal CT: Analysis of Quality and Clinical Impact in More Than 100 Consecutive Cases

Michael M. Maher1, Peter F. Hahn1, Debra A. Gervais1, Brid Seoighe1,2, James B. Ravenscroft1 and Peter R. Mueller1

1 Department of Radiology, Division of Abdominal Imaging and Intervention, Massachusetts General Hospital, 55 Fruit St., White 270, Boston, MA 02114.
2 Present address: Faculty of Health Sciences, University of Dublin, Trinity College, Dublin 2, Ireland.



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  		Fig. 1. —Photograph of portable CT scanner (Tomoscan M, Philips Medical Systems).

 


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  		Fig. 2. —Portable CT scan of 44-year-old man with fever shows normal lobulations of pancreas (P). Only 49% of portable CT scans delineated this feature.

 


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  		Fig. 3. —Contrast-enhanced portable CT scan of 50-year-old man shows pancolitis, with heterogeneously enhancing colonic wall surrounding narrowed lumen (arrows). Patient was successfully treated for pseudomembranous colitis.

 


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  		Fig. 4A. —65-year-old man with intraabdominal abscesses after breakdown of enteric anastomosis. Portable CT scan shows large extraluminal pelvic collection (E) containing leaking gastrointestinal contrast material. This collection was drained surgically.

 


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  		Fig. 4B. —65-year-old man with intraabdominal abscesses after breakdown of enteric anastomosis. Repeat portable CT scan shows interloop abscess (I) from peritoneal contamination.

 


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  		Fig. 4C. —65-year-old man with intraabdominal abscesses after breakdown of enteric anastomosis. Stationary (nonportable) CT scan obtained during percutaneous drainage shows deployment of drainage catheter. Note that stationary CT scan exhibits better image quality.

 


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  		Fig. 5. —Portable CT scan obtained in 83-year-old woman with coagulopathy shows large pelvic hematoma (H) of distinctly higher density than adjacent uterus (U).

 


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  		Fig. 6. —Portable CT scan of 64-year-old woman shows extensive perihepatic hematoma (arrows), incompletely evacuated during trauma surgery 1 day before.

 


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  		Fig. 7A. —Comparison of stationary and portable CT scans in 47-year-old man with acute pancreatitis. Contrast-enhanced stationary CT scan shows peripancreatic fluid (arrow) but homogeneous pancreatic enhancement.

 


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  		Fig. 7B. —Comparison of stationary and portable CT scans in 47-year-old man with acute pancreatitis. Although features of acute pancreatitis, including peripancreatic fluid (arrow), are visible on portable CT scan, they are better seen on stationary CT scan (A).

 


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  		Fig. 8A. —Comparison of portable and stationary CT scans in 80-year-old woman with pseudomembranous colitis. Portable CT scan shows early sigmoid colon thickening (arrows). High-density ascites partially obscures colon wall.

 


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  		Fig. 8B. —Comparison of portable and stationary CT scans in 80-year-old woman with pseudomembranous colitis. Stationary CT scan obtained 4 days after portable CT scan (A) shows layering hematocrit (open arrow) and marked progression of mural abnormality (solid arrows). Patient underwent colectomy for toxic megacolon.

 


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  		Fig. 9A. —73-year-old man with fever and sepsis. Contrast-enhanced portable CT scans show portal vein gas (arrows, A) and pneumatosis coli (arrows, B). Edematous but nonnecrotic bowel was found at laparotomy.

 


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  		Fig. 9B. —73-year-old man with fever and sepsis. Contrast-enhanced portable CT scans show portal vein gas (arrows, A) and pneumatosis coli (arrows, B). Edematous but nonnecrotic bowel was found at laparotomy.

 


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  		Fig. 10. —Portable CT scan obtained without IV contrast material in 50-year-old man with cardiac failure shows intraaortic balloon pump in lumen of aorta (straight arrow). Note typical fan-shaped artifact from intraaortic balloon pump (curved arrows). Gas bubble in ascites, anterior to liver, was introduced during recent paracentesis.

 

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