Automation system of X-ray filter in digital subtraction angiography.
A newly developed automation system for making X-ray filter in DSA was applied to clinical study. A low-dose test exposure image of the patient was input to a computer as a template. The image was scaled down and used to engrave the X-ray filter shape on a polystyrene foam block with a modeling machine according to the image data. The carved part was filled with barium paste, and the block was placed on the tube as an X-ray filter. In this study, the system contributed to make a patient-specific filter of sufficient amount of attenuation in a short time. Also, it could avoid the unreasonable exposure of the patient during the preparation of the filter.
Akaishi
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Department of Medical Electronics, Suzuka University of Medical Science and Technology, Mie, Japan. takesh-a02@aix.or.jp
D015901:Angiography, Digital Subtraction / Q000379:methods*; D001331:Automation; D005069:Evaluation Studies as Topic; D005374:Filtration; D006801:Humans