High-resolution imaging of coronary calcifications by intense low-energy fluoroscopic X-ray obtained from synchrotron radiation

Purpose. To obtain an intense monochromatic low-energy X-ray from synchrotr on radiation (SR) and apply it to detect coronary calcifications. Methods and Results: The SR beam was reflected with a silicon crystal to be expanded (150 mm in height and 80 mm in width) and to be monochromatized a t an energy level of 37 keV. The X-ray was intermittently irradiated to obt ain dynamic imaging of 30 images/s. Images were recorded by a digital fluor ography system. The low-energy X-ray from SR sharply visualized calcificati on of coronary arteries, while conventional X-ray could not visualize coron ary calcification. Conclusion: The intense monochromatic low-energy X-ray from SR is sensitive , has high-resolution for imaging coronary calcification and may serve as a screening method for coronary artery disease.