A Novel Marker Based Method to Teeth Alignment in MRI

Measurement Science Review

Malinen Jarmo¹  Ojalammi Antti¹  Parkkola Riitta²  Saunavaara Jani²  Niikuni Naoko³  Jääsaari Päivi³  Luukinen Jean-Marc³  Soukka Tero³  Happonen Risto-Pekka³  Aalto Daniel⁴ 

[1] Department of Mathematics and System Analysis, Aalto University, Otakaari 1 F, 00076, Espoo, Finland;Department of Medical Physics, Turku University Hospital, Kiinamyllynkatu 4-8, 20521, Turku, Finland;Department of Oral and Maxillofacial Surgery, University of Turku, Lemminkäisenkatu 2, 20520, Turku, Finland;Institute for Reconstructive Sciences in Medicine, Misericordia Hospital, 16940 87 Ave NW, Edmonton, AB, Canada;

关键词: Dental imaging;    Magnetic resonance imaging;    MRI markers;    teeth superposition;    vocal tract imaging;   

DOI  :  10.1515/msr-2018-0012

来源: DOAJ

【 摘 要 】

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 locations in vivo differed 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.

【 授权许可】

Unknown