Browse > Article
http://dx.doi.org/10.5392/JKCA.2011.11.12.814

Image Evaluation of Resolution Parameter and Reconstitution Filter in 256 Multi Detector Computed Tomography by Using Head Phantom  

Gu, Bon-Seung (분당서울대학교병원 영상의학과)
Seoung, Youl-Hun (청주대학교 방사선학과)
Publication Information
Abstract
The purpose of this study was to evaluate of resolution parameter and reconstitution filter in the 256 multi detector computed tomography(MDCT) by using the head phantom. We used 256 MDCT, and head phantom of philips system. We evaluated to image quality by using Extended Brilliance Workspace. The protocol were axial scan method with 120 kVp, 0.5 sec of rotation time, 5 mm of slice thickness and increment, 250 mm of field of view(FOV), $512{\times}512$ of matrix size, 1.0 of pitch, $128{\times}0.625$ mm of collimations. The resolution parameter was applied for 'Standard', 'High' and 'Ultrahigh'. The reconstitution filters were changed to seven type of 'A', 'B', 'C', 'D', 'UA', 'UB', 'UC'. The assesment factors of image quality were the uniformity, the noise, the linearity and 50% and 10% of the modulation transfer function(MTF). Finally The good image quality in 'High' resolution parameter showed at the uniformity, the linearity and 50% and 10% of MTF. The 'UA', 'UB' reconstitution filter showed at the good image quality of the uniformity and the noise and 'C' reconstitution filter showed at the same result of the linearity and 50% and 10% of MTF.
Keywords
256 Multi Detector Computed Tomography; Head Phantom; Resolution Parameter; Reconstitution Filter;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 이후민, 유병규, 권대철, "MDCT에서의 Convolution Kernel 종류에 따른 공간 영역 필터 링의 영상 평가", 방사선기술과학논문지, 제31권, 제1호, pp.71-81, 2008.
2 AAPM Report 1, Phantoms for performance evaluation and quality assurance of CT scanners American Association of Physicist in Medicine, Chicago, IL, USA, 1997.
3 E. Seeram, Computed Tomography : Physical Principles, Clinical Applications, and Quality Control. Saunders Book Company. British Columbia, pp.202-203, 2009.
4 S. Rathee, B. G. Fallone, and D. Robinson, "Modulation transfer function of digitally reconstructed radiographs using helical computed tomography," Med Phys, Vol.29, pp.110-113, 2002.
5 P. F. Judy, "The line spread function and modulation transfer function of a computed tomographic scanner," Med Phys, Vol.3, No.4, pp.233-236, 1976.   DOI   ScienceOn
6 R. T. Droege and R. L. Morin, "A practical method to measure the MTF of CT scanners," Med Phys, Vol.9, pp.758-760, 1982.   DOI   ScienceOn
7 G. Hounsfield, "Computerized transverse axial scanning (tomography) Part I. Description of system," Br J Radiol, Vol.46, pp.1016-1022, 1973.   DOI   ScienceOn
8 H. Hu, H. D. He, W. D. Foley, and S. H. Fox, "Four multidetector-row helical CT: image quality and volume coverage speed," Radiology, Vol.215, pp.55-62, 2000.   DOI   ScienceOn
9 S. Mori, "Comparison of patient doses in 256-slice CT and 16-slice CT scanner," Br J Radiol, Vol.79, pp.56-61, 2006.   DOI   ScienceOn
10 M. Mahesh, "Search for isotropic resolution in CT from conventional through multiple-row detector," Radiographics, Vol.22, pp.949-962, 2002.   DOI   ScienceOn
11 H. M. Pinsky, S. Dyda, R. W. Pinsky, K. A. Misch, and D. P. Sarment, "Accuracy of threedimensional measurements using cone-beam CT," Dentomaxillofac Radiol, Vol.35, pp.410-416, 2006.   DOI   ScienceOn
12 D. Cody and M. F. McNitt-Gray, CT image quality and patient dose. Definitions, methods and trade-offs. RSNA Categorical course in diagnostic radiology physics: from invisible to visible the science and practice of x-ray imaging and radiation dose optim-ization, 2006.
13 M. F. McNitt-Gray, "Radiation dose in CT," Radiographics, Vol.22, pp.1541-1553, 2002.   DOI   ScienceOn
14 보건복지부, 특수의료장비의 설치 및 품질관리에 관한 규칙, 보건복지부령 386호, 2007.
15 장근조, 권대철, "AAPM CT 성능 평가용 팬톰을 이용한 전산화단층촬영의 영상 평가를 위한 정도 관리 사례 연구", 한국콘텐츠학회논문지, 제7권, 제7호, pp.114-123, 2007.