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PubMed · 15480041

Periodically rotated overlapping parallel lines with enhanced reconstruction-based diffusion tensor imaging. Comparison with echo planar imaging-based diffusion tensor imaging.

Osamu Abe·Harushi Mori·Shigeki Aoki·Akira Kunimatsu·Naoto Hayashi·Tomohiko Masumoto·Haruyasu Yamada·Yoshitaka Masutani·Hiroyuki Kabasawa·Kuni Ohtomo
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Abstract

OBJECTIVE: To evaluate diffusion tensor imaging (DTI) based on periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) compared with DTI based on single-shot echo planar imaging (EPI). METHODS: Diffusion tensor data were acquired with PROPELLER (PROPELLER-DTI, 3 NEX), EPI (EPI-DTI2, 16 NEX) with the same acquisition time (11.4 minutes) and with EPI (EPI-DTI1, number of excitations = 4) with a shorter acquisition time (2.8 minutes). Regions of interest were set in the genu and splenium of the corpus callosum, as determined on T2-weighted fast spin echo images and fractional anisotropy (FA) maps, separately. Two neuroradiologists visually evaluated image distortion and quality in the supra- and infratentorial structures. RESULTS: In the genu, standard deviation determined by respective FA maps was decreased in order of PROPELLER-DTI, EPI-DTI1, and EPI-DTI2. Both EPI-DTI sequences were quantitatively superior in the splenium, but PROPELLER-DTI was less distorted. CONCLUSION: Periodically rotated overlapping parallel lines with enhanced reconstruction-DTI could become a complementary tool when qualitatively evaluating seriously distorted structures.

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AdultBrainCorpus CallosumDiffusion Magnetic Resonance ImagingEcho-Planar ImagingHumansImage EnhancementImage Processing, Computer-AssistedMalePeriodicityPhantoms, ImagingRadiographyReference ValuesRotationUltrasonographyComparative StudyEvaluation StudyJournal ArticleResearch Support, Non-U.S. Gov't

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Osamu Abe, Harushi Mori, Shigeki Aoki, Akira Kunimatsu, Naoto Hayashi, Tomohiko Masumoto, Haruyasu Yamada, Yoshitaka Masutani, Hiroyuki Kabasawa, Kuni Ohtomo. Periodically rotated overlapping parallel lines with enhanced reconstruction-based diffusion tensor imaging. Comparison with echo planar imaging-based diffusion tensor imaging.. https://doi.org/10.1097/01.rct.0000138008.85349.28

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