Virtual angiography (aka "Google Maps" for IR)

F. Edward Boas

I have developed a tool for virtual angiography from a CT scan. In the example shown to the right, the radiologist first marks the target lesions (hepatocellular carcinoma) on the CT scan in blue. The software then automatically traces the shortest vascular path (green) back to the aorta, and displays it in a simulated fluoroscopy view. A selective SMA angiogram (yellow) shows that the tumor is supplied by a replaced right hepatic artery off of the SMA. It also shows which side branches to avoid. You can rotate the image to match the current fluoro view. Essentially, this is Google Maps for interventional radiology. It shows you exactly how to get to your target lesion.

CT scan of hepatocellular carcinoma
virtual angiogram
Click to rotate

Related links:
CT metal streak artifact reduction
High dynamic range CT scans

Ed Boas' home page | Stanford radiology | CT metal artifact reduction