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RISS 인기검색어
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- 저자 : 김선기(Seun Ki Kim) (검색결과 2 건)
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CT검사로 인한 방사선 피폭이 혈액에 미치는 생물학적 변화에 관한 연구
권성옥(Seong Ohk Kwon),김선기(Seun Ki Kim),김강환(Kang Hwan Kim),하동윤(Dong Yoon Ha) 대한CT영상기술학회 2009 대한CT영상기술학회지 Vol.11 No.1
Purpose For this study we collected patients blood with performing CT exam before and after at our hospital and to research about radiation dose influence of blood cell count. Materials and methods The research object was implemented dynamic liver scan patient and blood analysis was performed with blood collected at CT exam before and after. In total 46 people(35 M, 11 Fe, mean age 57; range 30~77 years), weight ranged from 45kg to 112kg; mean 64kg, radiation dose ranged from 685mGy to 2,548mGy; mean 1,615mGy. The scan were performed with GE LightSpeed Ultra 16 Plus, Siemens Somatom Sensation 16, and blood analysis equipment using coulter counter theory, and sampling were used as EDTA tube. Blood examination value was compared with WBC, RBC, Hb, platelet, neutrophil, lymphocyte etc. Results WBC was decreased up to 46% compared to other cell. RBC cell was increased in 5 people and decreased in 41 people. Hb was increased up to 23% in 39 people and decreased in 7 people. Platelet was increased up to 13% in 35 people and decreased in 40 people. Neutrophil was increased up to 18.9% in 35 people and decreased in 40 people. Finally, lymphocyte was increased up to 6.6% but decreased 10.8% in 34 people. Conclusion Althougt we did not know the decrement or increase of the blood corpuscles whether radiation dose or not patient condition, but blood corpuscles count has varied in human body after CT examination. Further validation study is needed to know effect of radiation exposure to human body, because blood corpuscles is destroyed and newly born successively, and to understand about the precise process after radiation energy absorption.
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간공여자의 Hepatic Vascular 3D-CT Post processing의 유용성과 혈관변이의 분석
장진규(Jin Kyoo Jang),박상협(Sang Hyub Park),나사라(Sa ra Na),김선기(Seun Ki Kim) 대한CT영상기술학회 2013 대한CT영상기술학회지 Vol.15 No.1
목적: 생체간이식에서 간 공여자가 수술 전에 검사하는 MDCT angiography후 간 혈관의 영상처리의 기법과 다양한 혈관형태를 분석하고 유용성을 알아보고자한다. 대상 및 방법: 본원에서 2012년 1월부터 4월까지 간 공여자로 총206명의 환자로 남자:142명 여자 64명이었고 나이는17세에서 58세로 평균 나이는 32세이고, 영상은 MDCT angiography 동맥상, 간 문맥상으로 0.7㎜ Thin Slice Axial 영상을 얻었다. 장비는 GE Workstation (AW4.6)에서 3D기법 중 MIP로 재구성했으며, Axial image에서 혈관에 평행하게 Slabs와 Angle주어 Oblique Coronal로 재구성한 후, Oblique coronal image plane에서 Double Angle을 주었다. 이것은 영상 처리는 방사선사 1명에 의해서 진행되었으며, 방사선과 전문의 2명이 해부학적 구조를 판독했다. 결과: 다양한 slabs 두께로 coronal oblique MIP image 에서 Double angle주면 모든 혈관은 찾을 수 있었다. 간 동맥은 12가지 Type이었고 그중 classic Type 94건 46%, MHA origin from RHA 74건 36%였다. 간 정맥의 RIHV의 Accessory Vein은 206건중 163명 79% 이었고, 총 10가지 Type이었다. 간 문맥은 classic Type 179건 93%였고, 총 4 가지였다. 결론: 간 공여자의 간 동맥과 간정맥에 Accessory Vein Type은 다양하고 복잡하기 때문에 영상처리 시 주의가 필요하다. 간 실질, 간 문맥, 간 동맥의 CT값의 차이가 적은 것과 MHA와 같이 가는 혈관, RIHV는 기시부가 되는 혈관을 재구성하려면 Axial 영상을 참고하여 영상처리를 해야 보다 쉽게 혈관들을 표현할 수 있다. 또한 혈관의 구조, 길이, 굵기 및 영상의 대조도 분해능에 따라 적당한 Slabs를 적용하여 Double Angle기법을 사용해야 한다. 3D영상은 수술을 계획하는 외과의에게 정확한 정보를 제공할 수 있고, 수술시간 단축에 기여할 수 있으므로 큰 수술을 하는 간 공여자에게도 유용하리라고 사료된다. Purpose: To analyze various hepatic vascular structures and to evaluate usefulness of hepatic vascular 3D-CT post processing in liver donors who underwent preoperative MDCT angiography. Materials and method: From January 2012 to April 2012, 206 healthy volunteers (male : female; 142 : 64, mean age 32 years) underwent MDCT angiography. 0.7mm thin slice axial images of arterial phase and portal phase were acquired. Under GE workstation (AW 4.6) Maximum Intensity Projection (MIP) was applied through the images. Oblique coronal plane were reconstructed parallel to the axis of vessel and double angle technique was applied. A radiotechnologist reconstructed the images and two radiologists read the anatomical structures. Result: Every vessels can be found through double angle technique in coronal MIP images with various slab thickness. Hepatic arteries consisted of twelve types. Among them classic type accounted for 46% (ninety four cases),MHA origin from RHA accounted for 36%(seventy four cases). Hepatic vein had ten types. Accessory Vein of RIHV accounted for 79% (one hundred sixty three out of two hundred six cases). Portal vein had four cases and the classic type occupied 93% (one hundred seventy nine cases). Conclusion: In living donors liver transplantation, 3D MIP reconstruction of MDCT angiography should be performed with oblique coronal images and double angle technique according to the vascular sturctures, thickness and contrast resolution while the direction and thickness of vessels should be considered with raw data axial images. Especially when the structures whose CT numbers have small differences like liver tissues, portal veins and hepatic arteries or when MHA and RIHV are reconstructed axial images are essential. Considering hepatic arteries and accessory vein types of liver donors are complex, this reconstruction technique can be useful for the safety of liver donors producing accurate information to surgeons.
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