Performance of PROPELLER relative to standard FSE T2-weighted imaging in pediatric brain MRI
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T2-weighted fast spin-echo imaging (T2-W FSE) is frequently degraded by motion in pediatric patients. MR imaging with periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) employs alternate sampling of k-space to achieve motion reduction.
To compare T2-W PROPELLER FSE (T2-W PROP) with conventional T2-W FSE for: (1) image quality; (2) presence of artefacts; and (3) ability to detect lesions.
Materials and methods
Ninety-five pediatric patients undergoing brain MRI (1.5 T) were evaluated with T2-W FSE and T2-W PROP. Three independent radiologists rated T2-W FSE and T2-W PROP, assessing image quality, presence of artefacts, and diagnostic confidence. Chi-square analysis and Wilcoxon signed rank test were used to assess the radiologists’ responses.
Compared with T2-W FSE, T2-W PROP demonstrated better image quality and reduced motion artefacts, with the greatest benefit in children younger than 6 months. Although detection rates were comparable for the two sequences, blood products were more conspicuous on T2-W FSE. Diagnostic confidence was higher using T2-W PROP in children younger than 6 months. Average inter-rater agreement was 87%.
T2-W PROP showed reduced motion artefacts and improved diagnostic confidence in children younger than 6 months. Thus, use of T2-W PROP rather than T2-W FSE should be considered in routine imaging of this age group, with caution required in identifying blood products.
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- Performance of PROPELLER relative to standard FSE T2-weighted imaging in pediatric brain MRI
Volume 39, Issue 10 , pp 1038-1047
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- Author Affiliations
- 1. Department of Radiology, Vancouver General Hospital, 899 W. 12th Ave., Vancouver, Canada, V5Z 1M9
- 2. Department of Radiology, University of British Columbia, Vancouver, Canada
- 3. Lucile Salter Packard Children’s Hospital, Stanford University Medical Center, Palo Alto, CA, USA
- 4. Department of Radiology, Madigan Army Medical Center, Tacoma, WA, USA
- 5. Department of Radiology, Uniformed Services University of Health Sciences, Bethesda, MD, USA
- 6. Department of Radiology, Lucas Center, Stanford University, Palo Alto, CA, USA