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Congress: ECR25
Poster Number: C-15843
Type: Poster: EPOS Radiographer (scientific)
Authorblock: K. Gun Young; Seoul/KR
Disclosures:
Kim Gun Young: Nothing to disclose
Keywords: MR physics, MR, MR-Angiography, MR-Functional imaging, CAD, Experimental investigations, Technical aspects, Artifacts, Image verification, Quality assurance
Purpose Aliasing Artifact occurs when signal collection is insufficient or the bandwidth of signal collection is narrow, and can appear in both frequency encoding and phase encoding directions, but it mainly occurs in phase encoding directions. It usually occurs when a field of view(FOV) is smaller than the size of an object is selected[1]. In foot and ankle MRI scan[fig]1, a phenomenon in which the opposite anatomical structure appears inside the field of view(FOV) and such artifacts can cause impairment in...
Read more Methods and materials 1. Scan Equipments and Parameters The Scan was used Skyra Elf 3.0T (Magnetom Skyra Elf, Siemens Healthcare, Erlangen, Germany) and 16 channel Foot and Ankle Coil(Foot and Ankle 16A 3T Tim Coil, Siemens Healthcare Gmbh, Germany) and the detailed MR scan parameter is summarized in [table]1.2. Phantom and Self-made Carbon Fabric Fiber Tool1) PhantomThe phantom uses the Foot and Ankle Phantom(3300ml) provided by SIEMENS[fig]2. The phantom solution is a phantom in which NiSO4, Nacl, and H20 are properly distributed to prevent...
Read more Results 1.Image Analysis and Comparison(SNR)  In Phantom images, SNR of each ROI on T2 axial(Inphase, Water) according to whether or not the self-made carbon fabric fiber tool was 154.42±3.05 and 115.50±8.34, 31.53±1.08 and 21.24±2.27 and showed significant differences (p<0.05). SNR of ROI on T1 axial was 120.93±24.81 and 103.25±8.53 and significant differences(p<0.05)[table]2.In Chicken leg images, SNR of all ROIs also showed significant differences (p<0.05) [table]3. 2. RF Heating Test of Carbon Fabric Fiber ToolThe temperature change measurement of the Carbon Fabric Fiber according...
Read more Conclusion This study started by thinking about how to solve the aliasing artifact, which occurs frequently during the foot and ankle MRI scan. Therefore, we conducted this study with the aim of finding out how effective it is to reduce the aliasing artifact through RF shielding performance of carbon fabric fiber and RF heating experiments and how it affects the safety of patients against thermal injury. According to the results derived in this study, it was confirmed that the carbon fabric...
Read more References 1. Kang Hae-jin, MRI artifact and reducing technique, Korean Journal of Magnetic Resonance, 19992. Park Dong-woo, Lee Seung-rok, Ham Chang-gok et al. Artificial shading in 3DTOF and PC magnetic resonance angiography of intracranial blood vessels. Journal of Korean Radiology, 1997;36:553-5603. Young-Jun Lee, Magnetic Resonance Imaging of Spine: Normal Variations, Traps and Artifacts, Journal of the Korean Academy of Magnetic Resonance, 2001, 5(1):1-174. Olaf dietrich, Jose G. Raya MSc, Scott B. Reeder, et al. Measurement of signal to noise ratios in...
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