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Computer-Aided Detection (CAD) Using 360° Virtual Dissection: Can CAD in a First Reviewer Paradigm Be a Reliable Substitute for Primary 2D or 3D Search?

¹ Department of Radiology, Mayo Clinic, Rochester, MN 55905.
² Present address: Department of Radiology, Mayo Clinic, 13400 E Shea Blvd., Scottsdale, AZ 85259.

View larger version (109K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1A —47-year-old man with small tubular adenoma. Small polyp (arrow, B) was detected at computer-aided detection in 3D endoluminal (A), virtual dissection (B), and axial (C) views. Detected lesion (blue in B and multicolored areas in A and C) can be seen on all three views. Line drawn in C shows position and direction of endoluminal camera to create A.

View larger version (95K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1B —47-year-old man with small tubular adenoma. Small polyp (arrow, B) was detected at computer-aided detection in 3D endoluminal (A), virtual dissection (B), and axial (C) views. Detected lesion (blue in B and multicolored areas in A and C) can be seen on all three views. Line drawn in C shows position and direction of endoluminal camera to create A.

View larger version (97K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1C —47-year-old man with small tubular adenoma. Small polyp (arrow, B) was detected at computer-aided detection in 3D endoluminal (A), virtual dissection (B), and axial (C) views. Detected lesion (blue in B and multicolored areas in A and C) can be seen on all three views. Line drawn in C shows position and direction of endoluminal camera to create A.

View larger version (109K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2A —77-year-old man with large tubular adenoma. and Large polyp (arrow, A; multicolored area, B) was detected on both axial (A) and 3D endoluminal (B) views. Note that polyp is highlighted on both views.

View larger version (81K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2B —77-year-old man with large tubular adenoma. and Large polyp (arrow, A; multicolored area, B) was detected on both axial (A) and 3D endoluminal (B) views. Note that polyp is highlighted on both views.

View larger version (45K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3 —72-year-old woman with adenocarcinoma. This image shows cancer detected by computed-aided detection. Multiple detected lesions (blue) are visible.

View larger version (115K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 4A —49-year-old woman with large rectal tubular adenoma that was missed by radiologist (i.e., perceptive error). Tubular adenoma (arrow, A and C) that was not judged to be real polyp by single radiologist is shown on axial (A), 3D endoluminal (B), and virtual dissection (C) views. Note how polyp is not well seen on axial view (A). Polyp is elongated in virtual dissection (C) view. Line drawn in A shows position and direction of endoluminal camera.

View larger version (106K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 4B —49-year-old woman with large rectal tubular adenoma that was missed by radiologist (i.e., perceptive error). Tubular adenoma (arrow, A and C) that was not judged to be real polyp by single radiologist is shown on axial (A), 3D endoluminal (B), and virtual dissection (C) views. Note how polyp is not well seen on axial view (A). Polyp is elongated in virtual dissection (C) view. Line drawn in A shows position and direction of endoluminal camera.

View larger version (90K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 4C —49-year-old woman with large rectal tubular adenoma that was missed by radiologist (i.e., perceptive error). Tubular adenoma (arrow, A and C) that was not judged to be real polyp by single radiologist is shown on axial (A), 3D endoluminal (B), and virtual dissection (C) views. Note how polyp is not well seen on axial view (A). Polyp is elongated in virtual dissection (C) view. Line drawn in A shows position and direction of endoluminal camera.

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