differences between a primary “2D” and a primary “3D” read on CTC?
Differences Between Primary 2D and 3D Interpretation of CTC
| PRIMARY 2D | PRIMARY 3D | |
|---|---|---|
| Image visualization | Thin-section cross-sectional images. | Endoluminal volume-rendered (VR) images. |
| Technique | Visualization of the colon from rectum to cecum focusing on short segments in order to trace from the “floor” to the “ceiling.” In other words, every wall of the colon must be visualized for a given segment. | Fly-through visualization of the colon from rectum to cecum BOTH antegrade and retrograde. Retrograde views are necessary to view lesions on the back of a colonic fold. |
| Lesion characterization | Soft tissue windows on 2D images. | Soft tissue windows on 2D images. |
| Limitations | Usually takes a longer amount of time to perform than primary 3D review. | Nonvisualization of colonic walls submerged in fluid. Suboptimal visualization of poorly distended segments. |
