16.There are three basical methods of DSA, which are respectively temporary subtraction ,energy subtraction and hybrid subtraction.
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8.Passing though human body ,it can carry important characteristic information of inner structure, due to different features among bone, tissue and muscle.
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29.After the scan is completed ,you can adjust the window center and width for optimal viewing of the image.
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14.Stable output with less noise and ripple can be obtained under all radiographic conditions because a high-frequency inverter is used .
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41.You need to remain perfectly still during the time the imaging take place.
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24.CT produces a volume of data which can be manipulated ,through a process known as “windowing” , in order to demonstrate warriors bodily structures based on their ability to block the
X-ray beam.
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13.The flat panel detects the X-rays that have passed through the patient’body, converts them into electrical signals using X-ray scintillation effects, and sends the signals (digital image signals )to the digital radiography system.
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52.DICOM differs from some, but not all, data formats in that it groups information into data sets. That means that a file of a chest X-ray image, for example, actually contains the patient ID within the file, so that the image can never be separated from this informatio by mistake.
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27.The stability of the patient table is not at risk when scanning very heavy patient,but the correct functioning of the table (lift,positioning,precision) cannot be guaranteed 100%.
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48.A full PACS should provide a single point of access for images and their associated data. That is, it should support all digital modalities, in all departments, throughout the enterprise.
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