Significant dose reduction using synchrotron radiation computed tomography: first clinical case and application to...

Area of Science:

• Medical Imaging
• Radiological Physics
• Biomedical Engineering

Background:

• Computed Tomography (CT) has seen advancements in image sensitivity and resolution.
• No new X-ray source types have been introduced for clinical CT since its invention.
• Synchrotron radiation offers a unique coherent monochromatic X-ray source.

Purpose of the Study:

• To evaluate the clinical potential of Synchrotron Radiation CT (SRCT).
• To assess the image quality and radiation dose of SRCT compared to clinical CT.
• To demonstrate the feasibility of SRCT for patient imaging.

Main Methods:

• Acquisition of 3D CTs using coherent monochromatic X-rays from a synchrotron source.
• Quantitative image quality comparison on phantoms between SRCT and clinical CT.
• Development of iterative algorithms to optimize image quality and reduce radiation dose.
• Acquisition of SRCT images from a patient undergoing Synchrotron Radiotherapy.

Main Results:

• SRCT images were acquired using monochromatic X-rays at 80 keV with a voxel size of 0.350 × 0.350 × 2 mm³.
• Developed iterative algorithms improved image quality and reduced radiation dose by a factor of 12 compared to clinical CT.
• SRCT demonstrated superior image quality compared to a state-of-the-art clinical CT scanner.
• The study presents the first SRCT results from a patient in a clinical trial.

Conclusions:

• Synchrotron Radiation CT shows significant potential for clinical applications.
• SRCT offers improved image quality at a reduced radiation dose.
• The technique is particularly promising for inner ear visualization.