Radiation dose reduction with frame rate conversion in X-ray fluoroscopic imaging systems with flat panel detector:...

Area of Science:

• Medical Imaging and Radiation Oncology
• Image Processing and Analysis
• Radiological Sciences

Background:

• X-ray fluoroscopic techniques are essential in various clinical applications.
• Fluoroscopic examinations carry inherent risks associated with radiation exposure.
• Minimizing radiation dose while maintaining diagnostic image quality is a critical challenge in medical imaging.

Purpose of the Study:

• To evaluate the image quality of interpolation frames generated by frame rate conversion (FRC) compared to conventional fluoroscopic frames.
• To retrospectively compare radiation dose and fluoroscopy time in clinical examinations with and without FRC.
• To assess the efficacy of FRC as an image processing technique for radiation dose reduction in fluoroscopy.

Main Methods:

• A basic study involving dosimetry, visual assessment, and contrast-to-noise ratio measurements.
• Normalized cross-correlation was used to evaluate the similarity between FRC interpolation frames and conventional fluoroscopic frames.
• A retrospective clinical analysis of 270 fluoroscopic examinations comparing conventional (12.5 pulses/s) and FRC (6.25 pulses/s) groups.

Main Results:

• In the basic study, FRC approximately halved the radiation dose within the same fluoroscopy time (p = .031).
• FRC interpolation frames demonstrated similarity to conventional fluoroscopic frames.
• Clinical analysis revealed FRC reduced fluoroscopy dose by 48% and total dose by 31% (p < .001) without significant differences in other parameters.

Conclusions:

• Frame rate conversion (FRC) is an effective image processing technique for reducing radiation dose in X-ray fluoroscopy.
• FRC significantly lowers patient radiation exposure without compromising image quality or extending examination time.
• The findings support the clinical utility of FRC for safer fluoroscopic procedures.