Not my specialty
This is not my specialty but here's the lay description (from Encoder Pro)
The physician provides concurrent supervision for processing of computerized tomography (CT), magnetic resonance imaging (MRI), ultrasound, or other tomographic modality with 3D manipulation of volumetric data sets and image rendering. The exact nature of the 3D manipulation is dependent upon the type of study being performed and the purpose of the diagnostic imaging. Image manipulation can include 3D image segmentation (i.e., removing skeletal structure to better visualize vascular structure followed by identifying and segmenting vessels for individual analysis and review), 3D volume and surface rendering, and 3D image restoration by deconvolution (i.e., unfolding the colon or straightening tortuous blood vessels). Work can include diagnostic imaging and surgical planning with 3D images, scientific modeling and simulation, and other work involving volumetric data. Report 76376 for 3D rendering not requiring image postprocessing on an independent workstation. Report 76377 when image postprocessing on an independent workstation is required.
You might want to post on the Interventional Radiology forum to get a more experienced coder to answer.
Hope that helps.
F Tessa Bartels, CPC, CEMC