Optimization of Look-Locker Turbo-Field Echo-Planar Imaging and Evaluation of Its Accuracy in Head and Neck 3D T1 Mapping
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Le résumé fourni par la source
PURPOSE: We present a sequence for T1 relaxation-time mapping that enables a rapid and accurate measuring. The sequence is based on the Look-Locker method by employing turbo-field echo-planar imaging (TFEPI) acquisitions and time to free relaxation after constant application of the radiofrequency (RF) pulses. We optimized the sequence, and then evaluated the accuracy of the method in imaging of head and neck. MATERIALS AND METHODS: The method was implemented on a standard clinical scanner, and the accuracy of the T1 value was evaluated against that with the two-dimensional (2D) inversion recovery method. RESULTS: The percentage errors of the T1 value, as validated by phantom imaging measurements, were 3.1% for slow-relaxing compartments (T1 = 2736 msec) and 1.1% for fast-relaxing compartments (T1 = 264.2 msec). CONCLUSION: We demonstrated a fast 3D sequence to obtain multiple slices, based on the Look-Locker method for T1 measurement, which provided a rapid and accurate way of measuring the spin-lattice relaxation time. An acquisition time of approximately 5 min was achieved for T1 mapping; in principle, this can provide head and neck coverage with 15 slices.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- Optimization of Look-Locker Turbo-Field Echo-Planar Imaging and Evaluation of Its Accuracy in Head and Neck 3D T<sub>1</sub> Mapping
- Date Crossref
- 01/01/2016
- Éditeur
- Japanese Society for Magnetic Resonance in Medicine
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Nihon University Department of Radiology pays non établi dans la noticeUniversité ou école supérieure
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Ibaraki Prefectural University of Health Sciences Department of Radiological Sciences pays non établi dans la noticeUniversité ou école supérieure
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Philips Japan pays non établi dans la noticeEntreprise
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Philips Electronics Japan Ltd pays non établi dans la noticeEntreprise
Department of Radiology — Nihon University, Department of Radiological Sciences — Ibaraki Prefectural University of Health Sciences et Philips Japan, avec 1 autre affiliation.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.