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Hilgenfeld, Tim; Saleem, Muhammad Abdullah; Schwindling, Franz Sebastian; Ludwig, Ute; Hövener, Jan-Bernd; Bock, Michael; Flügge, Tabea; Eisenbeiss, Anne-Katrin; Nittka, Mathias; Mente, Johannes; Jende, Johann Malte Enno; Heiland, Sabine; Bendszus, Martin; Juerchott, Alexander

High-Resolution Single Tooth MRI With an Inductively Coupled Intraoral Coil—Can MRI Compete With CBCT?

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  • Medientyp: E-Artikel
  • Titel: High-Resolution Single Tooth MRI With an Inductively Coupled Intraoral Coil—Can MRI Compete With CBCT?
  • Beteiligte: Hilgenfeld, Tim; Saleem, Muhammad Abdullah; Schwindling, Franz Sebastian; Ludwig, Ute; Hövener, Jan-Bernd; Bock, Michael; Flügge, Tabea; Eisenbeiss, Anne-Katrin; Nittka, Mathias; Mente, Johannes; Jende, Johann Malte Enno; Heiland, Sabine; Bendszus, Martin; Juerchott, Alexander
  • Erschienen: Ovid Technologies (Wolters Kluwer Health), 2022
  • Erschienen in: Investigative Radiology
  • Sprache: Englisch
  • DOI: 10.1097/rli.0000000000000890
  • ISSN: 1536-0210; 0020-9996
  • Schlagwörter: Radiology, Nuclear Medicine and imaging ; General Medicine
  • Entstehung:
  • Anmerkungen:
  • Beschreibung: <jats:sec> <jats:title>Objectives</jats:title> <jats:p>The aims of this study were to quantify T1/T2-relaxation times of the dental pulp, develop a realistic tooth model, and compare image quality between cone-beam computed tomography (CBCT) and high-resolution magnetic resonance imaging (MRI) of single teeth using a wireless inductively coupled intraoral coil.</jats:p> </jats:sec> <jats:sec> <jats:title>Methods</jats:title> <jats:p>T1/T2-relaxometry was performed at 3 T in 10 healthy volunteers (283 teeth) to determine relaxation times of healthy dental pulp and develop a realistic tooth model using extracted human teeth. Eight MRI sequences (DESS, CISS, TrueFISP, FLASH, SPACE, TSE, MSVAT-SPACE, and UTE) were optimized for clinically applicable high-resolution imaging of the dental pulp. In model, image quality of all sequences was assessed quantitatively (contrast-to-noise ratio) and qualitatively (visibility of anatomical structures and extent of susceptibility artifacts using a 5-point scoring scale). Cone-beam computed tomography served as the reference modality for qualitative assessment. Statistical analysis was performed using 2-way analysis of variance, Fisher exact test, and Cohen κ.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>In vivo, relaxometry of dental pulps revealed T1/T2 relaxation times at 3 T of 738 ± 100/171 ± 36 milliseconds. For all sequences, an isotropic resolution of (0.21 mm)<jats:sup>3</jats:sup> was achieved, with acquisition times ranging from 6:19 to 8:02 minutes. In model, the highest contrast-to-noise ratio values were observed for UTE, followed by TSE and CISS. The best image/artifact quality, however, was found for DESS (mean ± SD: 1.3 ± 0.3/2.2 ± 0.0), FLASH (1.5 ± 0.3/2.4 ± 0.1), and CISS (1.5 ± 0.4/2.5 ± 0.1), at a level comparable to CBCT (1.2 ± 0.3/2.1 ± 0.1).</jats:p> </jats:sec> <jats:sec> <jats:title>Conclusions</jats:title> <jats:p>Optimized MRI protocols using an intraoral coil at 3 T can achieve an image quality comparable to reference modality CBCT within clinically applicable acquisition times. Overall, DESS revealed the best results, followed by FLASH and CISS.</jats:p> </jats:sec>