Efficacy of periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) for shoulder magnetic resonance (MR) imaging

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• 作者：Kazuya Nagatomo ; BSc ; RT^a ; ^{nkgzmyn.1103@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Hidetake Yabuuchi ; MD ; PhD^a ; ^{h-yabu@med.kyushu-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Yuzo Yamasaki ; MD ; PhD^b ; ^{yyama@radiol.med.kyushu-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Hiroshi Narita ; MSc ; RT^c ; ^{hiroshi.narita.ty@hitachi.com" class="auth_mail" title="E-mail the corresponding author} ; Seiji Kumazawa ; PhD ; RT^a ; ^{s_kmzw@hs.med.kyushu-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Tsukasa Kojima ; MSc ; RT^a ; ^{k.tsukasa.0910@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Noriyuki Sakai ; BSc ; RT^a ; ^{noriyuki.sakai0602@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Masahumi Masaki ; RT^d ; ^{m-masaki@kimura-hosp.or.jp" class="auth_mail" title="E-mail the corresponding author} ; Hiroshi Kimura ; MD ; PhD^e ; ^{h-kimura@kimura-hosp.or.jp" class="auth_mail" title="E-mail the corresponding author}
• 关键词：MRI ; magnetic resonance imaging ; PROPELLER ; periodically rotated overlapping parallel lines with enhanced reconstruction ; T2-FSE ; T2 fast spin echo ; PD-FSE ; proton density fast spin echo ; FOV ; field of view ; TR ; repetition time ; TE ; time echo ; RAPID ; rapid acquisition through a parallel imaging design ; NSA ; number of sample averaged ; BW ; bandwidth
• 刊名：European Journal of Radiology
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：85
• 期：10
• 页码：1735-1743
• 全文大小：2768 K

文摘

To elucidate the utility of PROPELLER for motion artefact reduction on shoulder MRI and to examine the influence of streak artefacts on diagnosis of clinical images.

Methods

15 healthy volunteers and 48 patients underwent shoulder MRI with/without PROPELLER (coronal oblique proton density-fast spin echo [PD-FSE], sagittal oblique T2-FSE). In a volunteer study, all sequences were performed in both static and exercise-loaded conditions. Two radiologists graded artefacts and delineation of various anatomical structures in the volunteer study and motion and streak artefacts in the clinical study. Mean scores were compared between sequences with/without PROPELLER. In the clinical study, mean scores of motion artefacts were compared with mean scores of streak artefacts. Wilcoxon signed-rank test was used for all comparisons.

Results

In both studies, PROPELLER significantly reduced motion artefacts (P < 0.05). In the volunteer study, it significantly improved delineations in sagittal oblique images in the exercise-loaded condition (P < 0.05). In the clinical study, streak artefacts appeared dominantly on images with PROPELLER (P < 0.05), but influenced diagnosis to a lesser extent than motion artefacts.

Conclusion

PROPELLER can reduce motion artefacts in shoulder MRI. While it does cause streak artefacts, it affects diagnosis to a lesser extent.