지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 조평곤
- 발행연도
- 2015
- 저작권
- 대구가톨릭대학교 논문은 저작권에 의해 보호받습니다.
이용수8
이 논문의 연구 히스토리 (2)
- 이 논문의 후속연구가 궁금하신가요?
- 연관 학술논문 또는 학술발표를 통해 보다 발전된 연구결과를 확인하실 수 있습니다.
- 이 논문의 연구 히스토리 확인하기
초록· 키워드
오류제보하기
Purpose: To image diagnosis in neurovascular diseases using Multi-Detector Computed Tomography, injected the same contrast material when inspecting Brain Computed Tomography Angiography to examine radiation dose and Image quality on changing Cerebral Artery CT number by tube voltage.
Subject and Method: Executed an examination with same condition[Beam Collimation 128 * 0.6 mm, Pitch 0.6, Rotation Time 0.5s, Slice Thickness 5.0 mm, Increment 5.0 mm, Delay Time 3.0 sec, Care Dose 4D (Demension ; D)] except for tube voltage on 50 call patients for BCTA and divided them into two groups (25 people for a group, group A: 80, group B: 120 kVp). From all the acquired images, set a ROI(Region of Interest) on four spots such as left cerebral artery, right cerebral artery, posterior cerebral artery and cerebral parenchyma to compare quantitative evaluation, qualitative evaluation and effective dose after measuring CT number value from Picture Archiving Communications System.
Result: Evaluating images with CT number acquired from BCTA examination, images with 80 kVp was 18% higher in Signal to Noise Ratio and 19% in Contrast to Noise Ratio than those with 120 kVp. It was seen that expose dose was decreased by over 50% with tube voltage 80 kVp than with 120 kVp.
Conclusion: Group A (25 patients) was examination with tube voltage 80 kVp while group B with 120 kVp to examine radiation dose and Image quality. It is considered effective to inspect with lower tube voltage than with conventional high kVp, which can reduce radiation dose without any affect on diagnosis
Subject and Method: Executed an examination with same condition[Beam Collimation 128 * 0.6 mm, Pitch 0.6, Rotation Time 0.5s, Slice Thickness 5.0 mm, Increment 5.0 mm, Delay Time 3.0 sec, Care Dose 4D (Demension ; D)] except for tube voltage on 50 call patients for BCTA and divided them into two groups (25 people for a group, group A: 80, group B: 120 kVp). From all the acquired images, set a ROI(Region of Interest) on four spots such as left cerebral artery, right cerebral artery, posterior cerebral artery and cerebral parenchyma to compare quantitative evaluation, qualitative evaluation and effective dose after measuring CT number value from Picture Archiving Communications System.
Result: Evaluating images with CT number acquired from BCTA examination, images with 80 kVp was 18% higher in Signal to Noise Ratio and 19% in Contrast to Noise Ratio than those with 120 kVp. It was seen that expose dose was decreased by over 50% with tube voltage 80 kVp than with 120 kVp.
Conclusion: Group A (25 patients) was examination with tube voltage 80 kVp while group B with 120 kVp to examine radiation dose and Image quality. It is considered effective to inspect with lower tube voltage than with conventional high kVp, which can reduce radiation dose without any affect on diagnosis
목차
Ⅰ. 서 론 11. 연구배경 12. 연구의 목적 3Ⅱ. 이론 41. CT의 역사 42. MDCT의 이론 53. CT검사의 피폭 선량 74. CT검사의 피폭 선량 표시 방법 84.1 MSAD (Multiscan Scan Average Dose) 94.2 CTDI (CT Dose Index) 94.3 CTDIw (Weigh CT Dose Index) 104.4 CTDIvol (CT Dose Index Volume) 104.5 DLP (Dose Length Product) 104.6 ED (Effective Dose) 115. CT 3차원 영상 기법 125.1 Shaded Surface Display 125.2 Volume Rendering Technique 135.3 Maximum Intensity Projection, Minimum Intensity Projection 145.4 Multi Planar Reformation 155.5 Virtual Endoscopy 166. 영상의 질 176.1 공간 분해능 (Spatial resolution) 186.2 대조도 분해능 (Contrast resolution) 197. 뇌혈관 질환 (Cerebral artery disease) 19Ⅲ. 연구 대상과 방법 251. 연구 대상 252. 연구 방법 252.1 기기 252.2 조영제 (Contrast media) 272.3 영상 분석 (Image analysis) 272.3.1 정량적 분석 (Quantitative analysis) 272.3.2 정성적 분석 (Qualitative analysis) 282.3.3 방사선 피폭 선량 분석 (Radiation dose analysis) 28Ⅳ. 연구 결과 301. 영상 평가 301.1 정량적 평가 301.1.1 CT Number 및 noise 301.1.2 SNR (Signal to Noise Ratio) 301.1.3 CNR (Contrast to Noise Ratio) 301.2 정성적 평가 332. 선량 평가 34Ⅴ. 고찰 및 결론 35Reference 37
최근 본 자료
댓글(0)
0