Harmeet Kaur MD, Presenter: Nothing to Disclose

Randy Devereux Ernst MD, Abstract Co-Author: Nothing to Disclose

Tara Lynn Sagebiel MD, Abstract Co-Author: Nothing to Disclose

Y. Nancy You MD, Abstract Co-Author: Nothing to Disclose

Ping Hou PhD, Abstract Co-Author: Nothing to Disclose

Haesun Choi MD, Abstract Co-Author: Nothing to Disclose

Accurate T and N staging of primary rectal cancer is a determinant of treatment approach in patients with rectal cancer. In this exhibit we present the technical strength and limitations of three MR imaging techniques in staging rectal cancer. We propose modifications to improve image quality and review clinical utility of each technique.

The three techniques are reviewed for relative technical strengths, limitations and clinical applications.Thin section T2 FSE is widely used, but staging accuracy varies. Modifications such as use of rectal gel and multiplanar high resolution imaging to improve accuracy are evaluated. The optimization of technical parameters and clinical utility of 3D CUBE and diffusion weighted imaging in staging rectal cancer are evaluated.   

MR imaging of rectal cancer with thin section T2 weighted images has been shown to have a high accuracy in the staging of rectal cancer. The results outside the MERCURY trial have been variable. We evaluate the most commonly encountered problems in staging with this technique and propose simple modifications to improve image quality. In addition the newer techniques of diffusion weighted imaging and 3D CUBE along with technical limitations and clinical utility are reviewed.

Kaur, H, Ernst, R, Sagebiel, T, You, Y, Hou, P, Choi, H, Preoperative Staging of Primary Rectal Tumors: Role of Thin Section Multiplanar 2 D T2 FSE Imaging, 3D Cube, and Diffusion-weighted Imaging.  Radiological Society of North America 2010 Scientific Assembly and Annual Meeting, November 28 - December 3, 2010 ,Chicago IL. http://archive.rsna.org/2010/9015406.html