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Performance evaluation of soft copy display systems according to AAPM TG18 protocol
1Department of Engineering Physics, Faculty of Engineering, Ankara University, 06100 Tandoğan, Ankara, Turkey. olgar@eng.ankara.edu.tr
Summary
New calibration significantly improved medical display performance, aligning liquid crystal display monitors with American Association of Physicists in Medicine (AAPM TG18) standards. Quantitative tests showed enhanced luminance and contrast response, crucial for accurate medical imaging.
Area of Science:
- Medical Physics
- Radiology
- Display Technology
Background:
- Medical displays are critical for accurate image interpretation in radiology.
- Adherence to established performance standards, such as AAPM TG18, is essential.
- Calibration ensures consistent and reliable display performance.
Purpose of the Study:
- To quantitatively evaluate the display performance of 33 medical liquid crystal display monitors.
- To assess performance before and after new calibration using the AAPM TG18 protocol.
- To determine compliance with the Digital Imaging and Communications in Medicine (DICOM) grayscale standard display function (GSDF).
Main Methods:
- Quantitative measurements of luminance, contrast, resolution, veiling glare, and chromaticity.
- Evaluation of luminance and contrast response against DICOM GSDF.
- Visual assessment of display noise.
- Testing conducted according to AAPM TG18 protocol.
Main Results:
- Post-calibration, mean deviations from expected DICOM GSDF response improved significantly (luminance: 9.76% to 1.23%, contrast: 2.35% to 0.26%).
- Most test results aligned with AAPM TG18 criteria.
- Calibration notably enhanced luminance and contrast response for some displays.
Conclusions:
- New calibration procedures substantially improve medical display performance.
- Calibration is vital for ensuring displays meet stringent AAPM TG18 and DICOM GSDF requirements.
- Optimized display performance supports enhanced diagnostic accuracy in medical imaging.
