KMID : 0357520180410050413
|
|
Journal of Radiological Science and Technology 2018 Volume.41 No. 5 p.413 ~ p.419
|
|
Evaluation of O-MAR XD Technique for Reduction of Magnetic Susceptibility Artifact of Knee Implant
|
|
Lee Jung-Hoon
|
|
Abstract
|
|
|
Magnetic Resonance Imaging for patients with metallic implant has poor image quality, and signal loss and artifacts including distortion can occur. The purpose of this study is to carry out a comparative evaluation on high receive bandwidth(hiBW), O-MAR, O-MAR XD to reduce artifacts in knee implant. To take MRI, 3.0T scanner and dual-source radiofrequency transmission were used. O-MAR XD technique¡¯s strong option showed a significant difference (p<0.001) with O-MAR XD technique¡¯s weak option, O-MAR and hiBW excluding the medium option. O-MAR XD¡¯s medium option had a significant difference (p<0.01) with O-MAR XD¡¯s weak, O-MAR and hiBW. O-MAR XD technique¡¯s weak option had a significant difference (p<0.01) with O-MAR XD¡¯s strong and medium options, O-MAR and hiBW. O-MAR technique had a significant difference (p<0.001) with strong, medium, weak options of O-MAR XD technique except for hiBW. HiBW had a significant difference (p<0.001) with strong, medium and weak options of O-MAR XD technique except for O-MAR. The results showed that O-MAR XD technique was more useful for MRI scan for patients with knee replacement surgery than traditional techniques such as hiBW or O-MAR, and susceptibility artifacts decreased more when O-MAR XD technique¡¯s strong or medium option was applied. Based on the results above, it is considered that it will be possible to acquire images whose susceptibility artifacts were highly decreased by using O-MAR XD technique¡¯s strong or medium option when conducting MRI for artificial knee joint and it will be helpful for checking and monitoring patients with knee joint replacement.
|
|
KEYWORD
|
|
Magnetic resonance imaging, Susceptibility artifact, View angle tilting, Orthopedic Metal Artifact Reduction, Slice encoding for metal artifact correction
|
|
FullTexts / Linksout information
|
|
|
|
Listed journal information
|
|
|
|