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[MR defecography at 1.5 Tesla with radial real-time imaging and reduced image field]
J Tacke1, C Nolte-Ernsting, A Glowinski
1Klinik für Radiologische Diagnostik, Universitätskliniken der RWTH Aachen. tacke@rad.rwth-aachen.de
Purpose:
To evaluate a new technique for MR defecography with real-time imaging using radial k-space profiles.
Materials And Methods:
A catheter-mounted condom was inserted into the rectum of 16 patients and filled in situ by a mixture of Nestargel and Gadolinium. After multiplanar imaging of the pelvis by high resolution T2-weighted turbo-spin echo sequences, defecation was imaged by a gradient echo sequence with radial k-space filling using a reduced field of view (rFOV) in real-time. The documentation was performed on an S-VHS recorder.
Results:
At a constant background signal, radial k-space filling yields a real-time impression. An interactive software allowed the operator to modify the slice thickness, slice plane, flip angle and slice angulation during scanning, resulting in an optimum imaging quality of the defecation.
Conclusions:
This new imaging technique allows real-time MR defecography in a high-field scanner and provides all anatomical und functional information of the defecation.