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RISS 인기검색어
- 검색키워드
- 저자 : 성경정 ( Kyeong Jeong Seong ) (검색결과 2 건)
- 무료
- 기관 내 무료
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3.0T MRI 척추 검사 시 Single-Source 고주파 전송 기법과 Dual-Source 고주파 병렬 전송 기법의 비교 분석
김현수 ( Hyun Soo Kim ),동경래 ( Kyung Rae Dong ),최성현 ( Sung Hyun Choi ),성경정 ( Kyeong Jeong Seong ) 조선대학교 공학기술연구원 2013 공학기술논문지 Vol.6 No.3
We desire to know that the comparison of single source RF transmission (ST) with dual source parallel RF transmission (DT) for clinical MR imaging of the spine and usefulness of dual source parallel RF transmission. 24 patients who took parts of spine examination became an object of the experiment. The result of Single-source RF transmission and dual-source parallel RF transmission scanning, T1 or T2 weighted DT technique are higher signal to noise ratio (SNR) than ST technique. In C-Spine (Cord&Body), T-Spine (Cord&Body) and L-Spine (Cord&Body), T1 or T2 weighted DT technique are higher SNR than ST technique. In quantitative analysis, SNR of DT technique is 2.5 times higher than SNR of ST technique. In qualitative analysis, T-Spine of C, T, L spine is the highest. Dual-source parallel RF transmission conducts RF pulse in parallel and don``t conduct a high electronic energy. Therefore, Electromagnetic absorption rate is decreased. shortening length of high frequency wave, Dual source parallel RF transmission makes Non-uniform signal strength uniform and improves an image quality. Furthermore, as decreasing local SAR from uniform image, TR value is reduced. Also, the examination time is reduced. In conclusion, during reading an image, an accurate information is offered. In spine MR examination, especially 3.0T, dual-source parallel RF transmission conducts an important role.
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김현수 ( Hyun Soo Kim ),동경래 ( Kyung Rae Dong ),최성현 ( Sung Hyun Choi ),성경정 ( Kyeong Jeong Seong ) 조선대학교 공학기술연구원 2013 공학기술논문지 Vol.6 No.3
In this research, we have investigated the composition of the gel which is actually used in clinical terms and discovered the viscosity and the differences in images due to the changes of composition. When evaluating the viscosity, we applied the existing gel and the made up gel on the acrylic panel board, then measured time of trickling gel by making the acrylic panel board stand vertically. In the case of the evaluation for images, we gained 3 images of gray scale each from the range of 0.5 dB in the phantom, and then calculated the RGB (Red, Green, Blue, RGB) code value of the pixels at the same spot for evaluation using Adobe Photoshop (Ver. 7.0). Furthermore, we have evaluated the utility of the made up gel by comparing the price of the existing gel to the price of the made up gel. Then we have surveyed 30 patients in their twenties who have ordinarily no skin ailments for skin reactions through questionnaires. As a result of the research, the made up gel is not so different from the existing gel. The viscosity of the made up gel is similar to that of the existing one the most when it is composed of 492 g of water, 3 g of Carbomer and 5 g of Triethanolamine. And through the investigation we have found that the gel is harmless if it is applied on the skin of human bodies. In addition, the cost of the made up gel is 10 times cheaper than purchasing the existing gel, which means the made up gel is financially beneficial. In conclusion, we are expecting that researches on ultrasound gel would be invigorated and the developed product would be introduced to our thesis.
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