Abstract
To provide an objective way of measuring image quality, a computer program was designed that automatically analyzes the test images of a contrast-detail (CD) phantom. The program gives a quantified measurement of image quality by calculating an Image Quality Figure (IQF). The aim of this work was to evaluate the program and adjust it to clinical situations in order to find the detectable level where the program gives a reliable figure of the contrast resolution. The program was applied on a large variety of images with lumbar spine and urographic parameters, from very low to very high image qualities. It was shown that the computer program produces IQFs with small variations and there were a strong linear statistical relation between the computerized evaluation and the evaluation performed by human observers (R2 = 0.98). This method offers a fast and easy way of conducting image quality evaluations.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A Tingberg (2000) Quantifying the quality of medical x-ray images Department of Radiation Physics Lund University Malmö 54
CE Metz RF Wagner K Doi DG Brown RM Nishikawa KJ Myers (1995) ArticleTitleToward consensus on quantitative assessment of medical imaging systems Med Phys 22 IssueID7 1057–1061 Occurrence Handle10.1118/1.597511 Occurrence Handle1:STN:280:BymD2Mjnt1c%3D Occurrence Handle7565380
S Kheddache LG Mansson JE Angelhed L Denbratt B Gottfridsson D Schlossman (1991) ArticleTitleEffects of optimization and image processing in digital chest radiography: an ROC study with an anthropomorphic phantom Eur J Radiol 13 IssueID2 143–150 Occurrence Handle10.1016/0720-048X(91)90097-F Occurrence Handle1:STN:280:By2D2sjgtFM%3D Occurrence Handle1743193
P Sund M Bath S Kheddache LG Mansson (2004) ArticleTitleComparison of visual grading analysis and determination of detective quantum efficiency for evaluating system performance in digital chest radiography Eur Radiol 14 IssueID1 48–58 Occurrence Handle10.1007/s00330-003-1971-z Occurrence Handle14564469
MAO Thijssen THOM JL Merx JM Lindeijer KR Bijkerk (1989) ArticleTitleA definition of image quality: the image quality figure BIR Rep 20 29–34
H Geijer KW Beckman T Andersson J Persliden (2001) ArticleTitleImage quality vs. radiation dose for a flat-panel amorphous silicon detector: a phantom study Eur Radiol 11 IssueID9 1704–1709 Occurrence Handle1:STN:280:DC%2BD3Mvms1Crtg%3D%3D Occurrence Handle11511892
XJ Rong CC Shaw X Liu MR Lemacks SK Thompson (2001) ArticleTitleComparison of an amorphous silicon/cesium iodide flat-panel digital chest radiography system with screen/film and computed radiography systems—a contrast-detail phantom study Med Phys 28 2328–2335 Occurrence Handle10.1118/1.1408620 Occurrence Handle1:STN:280:DC%2BD38%2FjsF2ltA%3D%3D Occurrence Handle11764040
AD Castellano Smith IA Castellano Smith DR Dance (1998) ArticleTitleObjective assessment of phantom image quality in mammography: a feasibility study Br J Radiol 71 IssueID841 48–58 Occurrence Handle1:STN:280:DyaK1c7ps1Wqug%3D%3D Occurrence Handle9534699
JT Jansen J Zoetelief (2000) ArticleTitleComputer aided assessment of image quality for mammography using a contrast detail phantom Radiat Prot Dosim 90 181–184
Norrman E, Gårdestig M, Geijer H, Persliden J: A clinical evaluation of the image quality computer program, CCIF (abstract). In: 21st Meeting of the Society for Computer Applications in Radiology. Vancouver Convention and Exhibition Centre, Vancouver, Canada, 2004
Thijssen MAO, Bijerk KR, van der Burght RJM: Manual CDRAD phantom type 2.0. Project Quality Assurance in Radiology. Section Clinical Physics, Dept. of Radiology. St. Radboud, The Netherlands: University Hospital Nijmegen, 1998
Geijer H, Persliden J: Effects of varying the tube potential with constant effective dose at lumbar spine radiography using a flat-panel digital detector—lower kV is better (abstract). In: Second Malmö Conference on Medical X-ray Imaging. Optimisation Strategies in Medical X-ray Imaging. Malmö, Sweden, April 2004, pp 23–25
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Norrman, E., Gårdestig, M., Persliden, J. et al. A Clinical Evaluation of the Image Quality Computer Program, CoCIQ. J Digit Imaging 18, 138–144 (2005). https://doi.org/10.1007/s10278-004-1036-0
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10278-004-1036-0