Evaluation of four different optimized magnetic-resonance-imaging sequences for visualization of dental and maxillo-mandibular structures at 3 T

Assaf, Alexandre T; Zrnc, Tomislav; Remus, Chressen Catharina; Schönfeld, Michael; Habermann, Christian R.; Riecke, Björn; Friedrich, Reinhard E; Fiehler, Jens; Heiland, Max; Sedlacik, Jan

doi:10.1016/j.jcms.2014.03.026

Cited by 51 publications

(55 citation statements)

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“…We recently explored the capability of current clinical MRI machines for dental imaging. 2 We found excellent visualization of dental or maxillomandibular soft-tissue structures. However, dental MRI with satisfactory image quality and high patient comfort is challenging without specifically optimized equipment for dental MRI.…”

Section: Introductionmentioning

confidence: 74%

“…For example, the patient's head needs to be positioned with an extended neck to bring the jaw close to the elements of a standard head and neck coil. 2 Standard flexible coil arrays have no suitable openings for mouth, nose and eyes and may exert intolerable pressure to the patient's face because of the missing coil supporting structure.…”

Section: Discussionmentioning

confidence: 99%

“…It prevents the patient from unconsciously opening the mouth or constantly exerting the masseter in order to keep the mouth closed during the examination. This makes additional uncomfortable jaw fixations or restrains, such as a head-chin bandage 2 or a mouth piece, obsolete. The butterfly element can also be retracted to allow for open mouth temporomandibular joint imaging.…”

Section: Discussionmentioning

confidence: 99%

“…A scoring system with 1 (excellent), 2 (good), 3 (moderate), 4 (poor) and 5 (not visible) was applied according to our previous work. 2 The scores for the different coils and MRI sequences were statistically compared by twofactor ANOVA with the level of significance of p 5 0.05.…”

Section: Methodsmentioning

confidence: 99%

“…However, MRI is not common in dentistry or oral-maxillofacial surgery. Earlier studies on dental MRI investigated its diagnostic value 1,2 or focused only on high-resolution imaging of the teeth. 3 So far, no study focused on making dental MRI feasible for clinical routine by optimizing the MRI coils or developing comfortable positioning system and dental MRI sequences.…”

Section: Introductionmentioning

confidence: 99%

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Optimized 14 + 1 receive coil array and position system for 3D high-resolution MRI of dental and maxillomandibular structures

Sedlacik

Kutzner

Schulze

et al. 2016

Dentomaxillofacial Radiology

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Objectives: The purpose of this study was to design, build and test a multielement receive coil array and position system, which is optimized for three-dimensional (3D) high-resolution dental and maxillomandibular MRI with high patient comfort. Methods: A 14 1 1 coil array and positioning system, allowing easy handling by the technologists, reproducible positioning of the patients and high patient comfort, was tested with three healthy volunteers using a 3.0-T MRI machine (Siemens Skyra; Siemens Medical Solutions, Erlangen, Germany). High-resolution 3D T 1 weighted, water excitation T 1 weighted and fatsaturated T 2 weighted imaging sequences were scanned, and 3D image data were reformatted in different orientations and curvatures to aid diagnosis. Results: The high number of receiving coils and the comfortable positioning of the coil array close to the patient's face provided a high signal-to-noise ratio and allowed high quality, high resolution, 3D image data to be acquired within reasonable scan times owing to the possibility of parallel image acquisition acceleration. Reformatting the isotropic 3D image data in different views is helpful for diagnosis, e.g. panoramic reconstruction. The visibility of soft tissues such as the mandibular canal, nutritive canals and periodontal ligaments was exquisite. Conclusions: The optimized MRI receive coil array and positioning system for dental and oral-maxillofacial imaging provides a valuable tool for detecting and diagnosing pathologies in dental and oral-maxillofacial structures while avoiding radiation dose. The high patient comfort, as achieved by our design, is very crucial, since image artefacts due to movement or failing to complete the examination jeopardize the diagnostic value of MRI examinations.

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Section: Introductionmentioning

confidence: 74%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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