Navigated abdominal T1-W MRI permits free-breathing image acquisition with less motion artifact |
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| Authors: | Shreyas S Vasanawala Yuji Iwadate Daniel G Church Robert J Herfkens Anja C Brau |
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| Institution: | (1) Department of Radiology, Lucile Packard Children’s Hospital, Stanford University, Stanford, CA, USA;(2) Applied Science Lab, GE Healthcare, Hino, Japan;(3) Department of Radiology, Stanford University Hospital & Clinics, Stanford University, Stanford, CA, USA;(4) Applied Science Lab, GE Healthcare, Menlo Park, CA, USA;(5) Stanford University School of Medicine, Lucile Packard Children’s Hospital, 725 Welch Road, Rm. 1679, Stanford, CA 94305-5913, USA |
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| Abstract: | T1-W imaging of the pediatric abdomen is often limited by respiratory motion artifacts. Although navigation has been commonly
employed for coronary MRA and T2-W imaging, navigation for T1-W imaging is less developed. Thus, we incorporated a navigator
pulse into a fat-suppressed T1-W SPGR sequence such that steady-state contrast was not disrupted. Ten children were scanned
after gadolinium administration three times in immediate succession: breath-hold with no navigation, free-breathing with navigation,
and free-breathing without navigation. Motion artifacts were scored for each sequence by two radiologists, showing fewer motion
artifacts with navigation compared to free-breathing and greater motion artifacts than with breath-holding. This work demonstrates
the feasibility and potential utility of navigation for pediatric abdominal T1-W imaging. |
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