Are Respiratory Triggered Diffusion Weighted Acquisitions of the Liver Effective at Eliminating Respiratory Motion?
Naama Lev-Cohain 1 , Qing Yuan 1 , Daniella Pinho 1 , Yin Xi 1 , and Ivan M. Pedrosa 1
Radiology, UT Southwestern Medical Center,
Dallas, TX, United States
Diffusion weighted imaging (DWI) acquisitions of the
liver are performed for lesion detection and
characterization. Respiratory triggered acquisitions
(RT) are used to eliminate anatomic misregistration
caused by respiratory motion. To our knowledge, the
effectiveness of RT strategies has not been explored. We
analyzed the effect of respiratory motion on slice
misregistration in DWI acquisitions. 74% of the DWI
acquisitions in our study had at least misregistration
in one of the 4 anatomic locations analyzed. Our results
indicate that the utility RT DWI for lesion
characterization in the liver may lack the robustness
needed for broad applicability in clinical practice.
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