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Image J 프로그램을 이용한 격자집속거리와 격자비에 따른 영상비교평가
서원주,서정범,이종웅,Seo, Won-Joo,Seo, Jeong-Beom,Lee, Jong-Woong 대한디지털의료영상학회 2012 대한디지털의료영상학회논문지 Vol.14 No.1
Pediatric head and neck phantom, using the rate by focusing distance and grid images, Image J using the Quality Assessment and Dose Area Product compared. X-ray laboratory equipment due to the Philips Digital DIAGNOST a 110 cm FFD set and using ACE Non-grid, focusing distance 110 cm (12 : 1), 140 cm (12 : 1), 180 cm (8 : 1) Focused grid, Acryl Phantom (Fluke Model 76-2 Series Phantom) 15.24 cm, by resolution chart image acquisition, image evaluation program (Image J Ver. 1.4.3.67, USA) imaging experiments were analyzed using. Dose Area Product in the Non Grid 0.028 $mGy{\cdot}cm^2$, focusing distance 110 cm (12 : 1), the 0.129 $mGy{\cdot}cm^2$, 140 cm (12 : 1), the 0.135 $mGy{\cdot}cm^2$, 180 cm (8 : 1) was measured with a 0.110 $mGy{\cdot}cm^2$ Non Grid, focusing distance 110 cm (12 : 1), 140 cm (12 : 1), 180 cm (8 : 1) Image obtained when grid using the image J program focusing distance 110 cm with grid based on the measured SNR and PSNR Non Grid if the SNR the 17.307 dB, PSNR of the 20.002 dB, if the SNR 28.755 dB, PSNR was measured by the 31.451 dB. Image J image analysis through the streets, rather than focusing on grid by the rate that could see an increase in dose. Select the grid by a small dose rate reduction is possible.
Epidural Injection시술시 투시율 변화에 따른 선량비교연구
서정범,오동훈,이정범,이종웅,Seo, Jeong-Beom,Oh, Dong-Hoon,Lee, Jeong-Beom,Lee, Jong-Woong 대한디지털의료영상학회 2013 대한디지털의료영상학회논문지 Vol.15 No.1
To be investigated and measures to reduce the medical exposure of patients to change the Epidural Injection time Fluoroscopy Pulse Rate in this study. Was conducted in 50 patients who underwent surgery Epidural Injection performed by interventional care of Konkuk University Hospital from January to April 2013. The treatment time with the change of Pulse rate, is measured in minutes fluoroscopy time, and measured the area dose (${\mu}Gym^2$) and depth dose (mGy). Using the Image J program, to measure the PSNR and SNR. The fluoroscopy time as a result surgery, there was no significance in the statistical analysis, and depth dose is 34.3 to 34.9%, was reduced from 35.8 to 38.7% the area dose. It is possible to reduce the appropriate Pulse rate, to reduce the dose without statistical analysis significance fluoroscopy time.
활성슬러지 공법의 생분해성 및 침강성에 미치는 염분 농도의 영향
서정범 ( Seo Jeong Beom ),황창민 ( Hwang Chang Min ) 한국물환경학회 2003 한국물환경학회지 Vol.19 No.6
This study was aimed at finding out the influence of salinity on the treatability and settleability in activated sludge process. For this, according to salinity, the distinctive feature of organic concentration such as TOC and BOD, sludge volume index(SVI) and observed yield coefficient were examined. The result of batch reactor test showed that the influence of salinity at the high concentration of MLSS was low on the removal efficiency of TOC. On the other hand, the result of continuous flow stirred tank reactor(CSTR) test showed that the TBOD removal efficient was higher the F/M ratio 0.4㎏BOD/㎏MLSS·day than the F/M ratio 0.2㎏BOD/㎏MLSS·day. The influence of salinity on the SVI was found higher the F/M ratio 0.4㎏BOD/㎏MLSS ·day than the F/M ratio 0.2㎏BOD/㎏MLSS·day to 10,000㎎/L of salinity. The test also showed that filamentous microorganism rapidly increased when salinity was l5,000㎎/L. SVI was stabilized in the reactor with F/M ratio 0.4㎏BOD/㎏MLSS·day causing activated sludge more viscous. On the other hand, when the F/M ratio kept at about 0.2㎏BOD/㎏MLSS·day, SVI increased rapidly due to a sludge bulking.