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2016 ; 6
(ä): 23301
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Dental MRI using wireless intraoral coils
#MMPMID27021387
Ludwig U
; Eisenbeiss AK
; Scheifele C
; Nelson K
; Bock M
; Hennig J
; von Elverfeldt D
; Herdt O
; Flügge T
; Hövener JB
Sci Rep
2016[Mar]; 6
(ä): 23301
PMID27021387
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Currently, the gold standard for dental imaging is projection radiography or
cone-beam computed tomography (CBCT). These methods are fast and cost-efficient,
but exhibit poor soft tissue contrast and expose the patient to ionizing
radiation (X-rays). The need for an alternative imaging modality e.g. for soft
tissue management has stimulated a rising interest in dental magnetic resonance
imaging (MRI) which provides superior soft tissue contrast. Compared to X-ray
imaging, however, so far the spatial resolution of MRI is lower and the scan time
is longer. In this contribution, we describe wireless, inductively-coupled
intraoral coils whose local sensitivity enables high resolution MRI of dental
soft tissue. In comparison to CBCT, a similar image quality with complementary
contrast was obtained ex vivo. In-vivo, a voxel size of the order of 250 ? 250 ?
500 ?m(3) was achieved in 4 min only. Compared to dental MRI acquired with
clinical equipment, the quality of the images was superior in the sensitive
volume of the coils and is expected to improve the planning of interventions and
monitoring thereafter. This method may enable a more accurate dental diagnosis
and avoid unnecessary interventions, improving patient welfare and bringing MRI a
step closer to becoming a radiation-free alternative for dental imaging.
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