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Effect of frame rate on image quality in cardiology evaluated using an indirect conversion dynamic flat-panel
1Department of Data Science, Faculty of Information Engineering, Toyama Prefectural University, 5180 Kurokawa, Imizu-shi, Toyama, 939-0398, Japan. a-hasegawa@pu-toyama.ac.jp.
Radiological Physics and Technology
|September 18, 2024
Summary
Frame rate impacts cardiology imaging quality. Higher frame rates with dynamic flat-panel detectors (FPDs) reduce noise but increase image lag, affecting diagnostic accuracy.
Area of Science:
- Medical Imaging
- Radiological Physics
Background:
- Dynamic flat-panel detectors (FPDs) are crucial for cardiovascular imaging.
- Optimizing frame rates is essential for balancing image quality and diagnostic information.
Purpose of the Study:
- To evaluate the influence of varying frame rates on the image quality of indirect conversion dynamic FPDs in cardiology.
- To quantify key image quality metrics at different frame rates.
Main Methods:
- Input-output characteristics, modulation transfer function (MTF), and normalized noise power spectrum (NNPS) were measured.
- Image lag correction factor (r) was determined for still images and videos across frame rates (7.5-30 fps).
Main Results:
- Input-output characteristics and MTF remained consistent across tested frame rates.
- NNPS decreased with increasing frame rates, indicating reduced noise.
- Image lag correction factor (r) decreased as frame rate increased, with the lowest value at 30 fps.
Conclusions:
- High-frame-rate imaging with indirect conversion dynamic FPDs in cardiology is susceptible to image lag.
- Image lag at higher frame rates may compromise diagnostic image quality.
