Can we shorten the q-space imaging to make it clinically feasible?
Purpose: Q-space imaging (QSI) is a novel magnetic resonance imaging (MRI) technique that enables assessment of micro-structural changes of white matter. The acquisition time, however, is comparatively long to use for routine clinical assessment. Therefore, the present study investigated the clinica...
| Publicado en: | Japanese Journal of Radiology Vol. 35; no. 1; pp. 16 - 25 |
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| Autores principales: | , , , , , , , |
| Formato: | diagnostic images equations & formulas research tables/charts Journal Article |
| Publicado: |
Springer Nature
Jan2017
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=120630932&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 120630932 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 18671071 AUCM jtl: Japanese Journal of Radiology issn: 18671071 maglogo: N pubinfo: dt: Jan2017 vid: 35 iid: 1 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 120630932 120630932 144048383 NLM27807795 120630932 10.1007/s11604-016-0593-8 NLM27807795 120630932 ppf: 16 ppct: 9 formats: fmt: @attributes: type: P tig: atl: Can we shorten the q-space imaging to make it clinically feasible? aug: au: Sakai, Koji Yamada, Kei Akazawa, Kentaro Tazoe, Jun Yasuike, Masashi Nagano, Hitomi Ikeno, Hiroyasu Nakagawa, Toshiaki affil: Department of Radiology, Graduate School of Medical Science , Kyoto Prefectural University of Medicine , Kajii-cho, Kawaramachi Hirokoji Agaru, Kamigyo-ku Kyoto 602-8566 Japan sug: subj: Image Processing, Computer Assisted Methods Magnetic Resonance Imaging Methods Brain Female Pilot Studies Adult Reference Values Male Middle Age Scales Human Adult: 19-44 years Middle Aged: 45-64 years Female Male ab: Purpose: Q-space imaging (QSI) is a novel magnetic resonance imaging (MRI) technique that enables assessment of micro-structural changes of white matter. The acquisition time, however, is comparatively long to use for routine clinical assessment. Therefore, the present study investigated the clinically feasible b value combinations to measure the water molecular displacement probability density function (PDF) in healthy subjects.Methods: The subjects consisted of five healthy volunteers (1 female and 4 male; 40.8 ± 13.2 years). All MRIs were examined at 1.5 T. The QSI was acquired using a single-shot echo-planar imaging and Δ/δ = 142/17 ms. The magnitude of the gradients was incremented in nine steps to reach a maximal b = 10,000 s/mm2. The total acquisition time of this original QSI was 17.4 min. The feasibility of ten alternative b value combinations with the zero-filling or curve fitting technique was assessed. The mean diffusivities (MDs), kurtosis, and zero displacement probability (ZDP) were obtained, and these results were compared in manually segmented regions of interest.Results: There were alternative b value combinations with a 7.5-min acquisition time and with almost the same PDF.Conclusion: A few alternative b value combinations with the curve fitting technique were found to be able to shorten the QSI acquisition for its clinical feasibility of MD and ZDP. pubtype: Academic Journal doctype: diagnostic images equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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