Abstract
Although clinical images provide the ultimate test of diagnostic performance for a film digitizer, such images are not generally suitable for daily quality control (QC) purposes. However, a well-designed test pattern will provide a rapid, comprehensive, objective and reproducible assessment of image quality. This pattern should evaluate various parameters of image quality, including high contrast resolution, low contrast discrimination, linearity of gray scale, geometric distortion, and noise. Furthermore, the pattern should detect light leak and film slippage, two problems commonly associated with film digitizers. The test pattern described in this manuscript was designed to provide quantitative measures of performance for a film digitizer. As part of a regular QC routine for a laser scanner or charge-coupled device digitizer, this pattern provides a simple method to identify and quantify changes in digital image quality.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Gray JE, Kiks KG, Haddick DH, et al: Test pattern for video displays and hard copy cameras. Radiology 154:519–527, 1985
Roehrig H, Blume H, Ji TL, et al: Performance tests and quality control of cathode ray tube displays. J Digit Imaging 3:134–145, 1990
Halpern EJ, Esser PD: An improved phantom for quality control of laser scanner digitizers in picture archival and communications systems. J Digit Imaging 4:241–247; 1991
Huda W, Jing Z, Hoyle BA: Film density calibration for computed radiography systems: Is the standard three-point procedure accurate? Radiology 188:875–877, 1993
Siegel EL, Templeton AW, Cook LT, et al: Image calibration of laser digitizers, printers and gray scale displays. Radiographics 12:329–335, 1992
Ackerman SJ, Gitlin JN, Gaylor RW, et al: Receiver operating characteristic analysis of fracture and pneumonia detection: Comparison of laser-digitized workstation images and conventional analog radiographs. Radiology 186: 263–268, 1993
Slasky SB, Gur D, Good WF, et al: Receiver operating characteristic analysis of chest image interpretation with conventional, laser printer and high resolution workstation images. Radiology 174:775–780, 1990
Sajardo LL, Hillman BJ, Pond GD, et al: Detection of pneumothorax: Comparison of digital and conventional chest imaging. AJR 152:475–480, 1989
Halpern EJ, Newhouse JH, Amis ES, et al: Evaluation of teleradiology for interpretation of intravenous urograms. J Digit Imaging 5:101–106, 1992
Good WF, Gur D, Feist JH, et al: Subjective and objective assessment of image quality—a comparison. J Digit Imaging 7:77–78, 1994
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Halpern, E.J. A test pattern for quality control of laser scanner and charge-coupled device film digitizers. J Digit Imaging 8, 3–9 (1995). https://doi.org/10.1007/BF03168050
Issue Date:
DOI: https://doi.org/10.1007/BF03168050