| 摘要 |
An X-ray diagnostic system for angiographic X-ray examinations having an X-ray source for irradiating a patient, a television image intensification chain, a digital semiconductor memory for storing image data and an image subtraction device for producing images which are the result of the difference between images taken with the patients injected with an X-ray contrast medium and images taken without the X-ray contrast medium. The resulting subtraction image shows only the blood vessels important to the examination. A control device directs the storage of data in the digital semiconductor memories. The memories contain data for successive images and, when full, may be overwritten by subsequent image data.
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