Evaluation of the Relationship Between Respiratory Hepatic and Renal Motion Using Real-Time MRI

Aaryani Tipirneni^1,2, Ruitian Song¹, Ralf B. Loeffler¹, Claudia M. Hillenbrand¹

For navigated slice tracking of a specific organ an appropriate tracking factor TF describing the motion of the organ with respect to the superior-inferior diaphragm movement needs to be applied. Information about TF may improve the image quality, increase the window size, and reduce the total scan time. The effectiveness of the navigator approach can, however, be degraded by erroneous TF values. Hence, we investigate renal TFs in 3 directions (superior inferior, anterior-posterior, and medial-lateral) with respect to the liver/diaphragm motion. We present mean TF data derived from organ motion measurements in eight healthy volunteers.