Visualization of dental crown shape in an MRI-based speech production study

Wakumoto, Masahiko; Shimono, Masayuki; Dang, J.; Honda, Kosuke; Shimada, Yasushi; Fujimoto, Ichiro; Nakamura, Yasuo

doi:10.1016/s0901-5027(97)81405-1

Cited by 10 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…First, a digital model of dentition can be aligned to the MRI by completely or partly covering the dentition with a contrast medium to provide data for alignment. [10], [12]- [18] In these methods, a digital dental model based on optical or conventional impressions is superimposed to the MR image. Second, the dentition can be directly measured by MRI.…”

Section: Introductionmentioning

confidence: 99%

A Novel Marker Based Method to Teeth Alignment in MRI

Luukinen

Aalto

Malinen

et al. 2018

Measurement Science Review

View full text Add to dashboard Cite

Magnetic resonance imaging (MRI) can precisely capture the anatomy of the vocal tract. However, the crowns of teeth are not visible in standard MRI scans. In this study, a marker-based teeth alignment method is presented and evaluated. Ten patients undergoing orthognathic surgery were enrolled. Supraglottal airways were imaged preoperatively using structural MRI. MRI visible markers were developed, and they were attached to maxillary teeth and corresponding locations on the dental casts. Repeated measurements of intermarker distances in MRI and in a replica model was compared using linear regression analysis. Dental cast MRI and corresponding caliper measurements did not differ significantly. In contrast, the marker locationsin vivodiffered somewhat from the dental cast measurements likely due to marker placement inaccuracies. The markers were clearly visible in MRI and allowed for dental models to be aligned to head and neck MRI scans.

show abstract

Section: Introductionmentioning

confidence: 99%

A Novel Marker Based Method to Teeth Alignment in MRI

Luukinen

Aalto

Malinen

et al. 2018

Measurement Science Review

View full text Add to dashboard Cite

show abstract

“…Wakumoto et al [8] developed a ''dental crown imaging plate'' comprising a dental crown plate enclosing a contrast medium. With this plate, the dental crown shape can be visualized in MR images.…”

Section: Introductionmentioning

confidence: 99%

Dental imaging using a magnetic resonance visible mouthpiece for measurement of vocal tract shape and dimensions

Kitamura

Nishimoto²,

Fujimoto³

et al. 2011

Acoust. Sci. & Tech.

View full text Add to dashboard Cite

“…Matsumura et al [14] and Niikawa et al [15,16] used a dental crown plate made of vegetable oil to directly image the dental boundaries. Wakumoto et al [17] used double plastic plates with an oil layer in between for the same purpose.…”

Section: Introductionmentioning

confidence: 99%

“…The methods using the dental cast [6][7][8][9][10][11] or dental crown plates [14][15][16][17] required imageby-image manual segmentation of the tooth boundaries, which takes time and effort. The methods using x-ray TECHNICAL REPORT [3,4,12,13] are of limited use.…”

Section: Introductionmentioning

confidence: 99%

A method of tooth superimposition on MRI data for accurate measurement of vocal tract shape and dimensions

Takemoto

Kitamura

Nishimoto

et al. 2004

Acoust. Sci. & Tech.

View full text Add to dashboard Cite

Measurement of vocal tract area functions from MRI data requires a technique for tooth visualization because the teeth are as transparent as air in the images. In this article, a new method is proposed to accurately superimpose the teeth onto MRI volume data. Upper and lower tooth images with the surrounding bony structure are obtained by scanning a subject holding a contrast medium in the oral cavity. They are superimposed onto the target volume data via a three-dimensional transformation using landmarks sampled from the tooth images and target MRI data. The accuracy of the dental image superimposition is ensured by the minimization of the error volume, which is the mismatch volume of the dental image overlapping the surrounding soft tissue. The method is evaluated using five operators sampling the landmarks. Results show that the error volume is significantly reduced to a nearly constant value regardless of the operator's skill.

show abstract

Visualization of dental crown shape in an MRI-based speech production study

Cited by 10 publications

References 0 publications

A Novel Marker Based Method to Teeth Alignment in MRI

A Novel Marker Based Method to Teeth Alignment in MRI

Dental imaging using a magnetic resonance visible mouthpiece for measurement of vocal tract shape and dimensions

A method of tooth superimposition on MRI data for accurate measurement of vocal tract shape and dimensions

Contact Info

Product

Resources

About