Threshold contrast detail detectability curves for fluoroscopy and digital acquisition using modern image intensifier systems.

Threshold contrast detail detectability (TCDD) test objects are a commonly used tool to assess image quality of imaging systems. FAXIL (The Facility for the Assessment of X-ray imaging, Leeds) produced updated standard TCDD curves, for fluoroscopy systems in good adjustment, in 1992. Fluoroscopy curves can be corrected to account for the effect of image intensifier input air kerma rate and field size. This paper presents updated TCDD curves for fluoroscopy and new curves for digital acquisition. The results for digital acquisition suggest that the TCDD curves should not be corrected for input air kerma, as the quantum noise is not dominant and system noise is significant. These curves will prove useful for accepting new equipment, to give an indication of the expected image quality for a new image intensifier system.

[1]  C J Kotre,et al.  Receptor dose in digital fluorography: a comparison between theory and practice. , 2001, Physics in medicine and biology.

[2]  E Grabbe,et al.  Storage phosphor direct magnification mammography in comparison with conventional screen-film mammography--a phantom study. , 1998, The British journal of radiology.

[3]  D J Gallacher,et al.  Use of a quality index in threshold contrast detail detection measurements in television fluoroscopy. , 2003, The British journal of radiology.

[4]  A set of X-ray test objects for quality control in television fluoroscopy. , 1985, The British journal of radiology.

[5]  L. Wagner,et al.  Evaluation of a digital subtraction angiography unit. , 1982, Radiology.

[6]  Arnold R. Cowen,et al.  Signal, noise and SNR transfer properties of computed radiography , 1993 .

[7]  S. Evans,et al.  Recommended Standards For The Routine Performance Testing of Diagnostic X-Ray Imaging Systems , 1998 .

[8]  C J Kotre,et al.  An alternative approach to contrast-detail testing of X-ray image intensifier systems. , 1992, The British journal of radiology.

[9]  C. J. Kotre.  Measurement of the Performance Characteristics of Diagnostic X-Ray Systems used in Medicine: X-ray Image Intensifier Television Systems. (IPEMB Report 32) , 1996 .

[10]  John Wilson,et al.  Evaluation of a Digital Spot Mammographic Unit Using a Contrast Detail Phantom , 1998, Digital Mammography / IWDM.

[11]  A R Cowen,et al.  Update on the recommended viewing protocol for FAXIL threshold contrast detail detectability test objects used in television fluoroscopy. , 1995, The British journal of radiology.

[12]  C. J. Kotre,et al.  Measurement and correction of the effects of lag on contrast-detail test results in fluoroscopy. , 2002, Physics in medicine and biology.