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http://dx.doi.org/10.7742/jksr.2019.13.7.1025

A Study on the Artifact Reduction Method of Magnetic Resonance Imaging in Dental Implants and Prostheses  

Shin, Woon-Jae (Department of Radiological Technology, Dong-Eui Institude of Technology)
Publication Information
Journal of the Korean Society of Radiology / v.13, no.7, 2019 , pp. 1025-1033 More about this Journal
Abstract
Although magnetic resonance imaging without linear hardening of CT is recognized as a method of obtaining high contrast of tissue and excellent resolution image in brain disease and head and neck examination, magnetic susceptibility artifact is generated in case of metal implants in the oral cavity, which is an obstacle to image diagnosis. Therefore, an effort was made in this thesis to find a method to reduce artifacts caused by dental implants and prosthesis in MRI. Implant-induced artifacts in magnetic resonance imaging showed that the signal size increased with shorter TE in GE technique and was inconsistent with water temperature change. In SE technique as well, the signal size of water was generally higher than that of air, but the signal to noise ratio (SNR) was not different by air and temperature. In EPI technique, images with fewer artifacts were obtained quantitatively and qualitatively when there was more water than air, and the signal to noise ratio was measured the highest, especially at water temperatures of 20° and 30°. In conclusion, when examining using the EPI technique rather than the SE or the GE technique, obtaining brain diffusion using a 20° and 30° water bag reduces the magnetic susceptibility artifacts caused by implants and prosthesis, suggesting that it may provide images with high diagnostic value.
Keywords
Magnetic Resonance Imaging; Susceptibility artifact; Implant; Prostheses; Echo planar imaging; EPIA Study on the Artifact Reduction Method of Magnetic;
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