Erschienen in:
01.03.2010 | Technical Innovation
Navigated abdominal T1-W MRI permits free-breathing image acquisition with less motion artifact
verfasst von:
Shreyas S. Vasanawala, Yuji Iwadate, Daniel G. Church, Robert J. Herfkens, Anja C. Brau
Erschienen in:
Pediatric Radiology
|
Ausgabe 3/2010
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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.