Title :
Theoretical study of evaluation method for MRI metal artifact
Author :
Sasaki, Yutaka ; Akutagawa, Masatake ; Emoto, Takahiro ; Tegawa, Yoshinori ; Kinouchi, Yohsuke
Author_Institution :
Grad. Sch. of Adv. Technol. & Sci., Univ. of Tokushima, Tokushima, Japan
Abstract :
In dental field, the effect of the Magnetic Resonance Imaging (MRI) artifact generated by the magnetic metal is a significant problem. The MRI metal artifact occurs when using magnetic attachment and the keeper of the ferromagnetic substance remains implanted in the mouth as the MR image is taken. In this study, we theoretically evaluated and analyzed the artifact of MR images caused by the keeper based on the actual principle of MRI by means of simulation. As a result we were able to recognize the changes and distortion in the signal strength of the output image. We found that our results of output images and previously reported results of actual measurement are very similar. MRI artifact caused by dental magnetic metal showed that it can be reported by theoretical simulation.
Keywords :
biomedical MRI; dentistry; ferromagnetic materials; image recognition; medical image processing; MR image; MRI metal artifact; Magnetic Resonance Imaging artifact; actual measurement; dental field; dental magnetic metal; evaluation method; ferromagnetic substance; image recognition; magnetic attachment; output image; signal strength distortion; theoretical simulation; Dentistry; Encoding; Image reconstruction; Magnetic fields; Magnetic resonance imaging; Metals; Artifacts; Evaluation Studies as Topic; Imaging, Three-Dimensional; Magnetic Resonance Imaging; Metals; Models, Theoretical; Phantoms, Imaging; Spin Labels;
Conference_Titel :
Engineering in Medicine and Biology Society (EMBC), 2013 35th Annual International Conference of the IEEE
Conference_Location :
Osaka
DOI :
10.1109/EMBC.2013.6609690
