These tests are invasive and can actually cause a stroke
a
What technique creates a three dimensional dynamic image of blood vessels
In digital subtraction angiography (DSA), an image is obtained prior to the introduction of the radio-opaque contrast medium. This image is then digitally "subtracted" by turning it into a "negative" and then superimposing the image onto images acquired after the injection of contrast. This theoretically results in everything but the image of contrast within the vessel being subtracted, or removed, leaving a clearer picture. Often due to patient movement, breathing etc, the two images do not exactly superimpose and some residual shadow of the surrounding structures may be visible.
substraction
Angiography is an x-ray imaging technique usually used to image hearts and vessels. New imaging techniques are also available for the same purpose, for example, CT angiography and MR angiography.
what are the chief limitations to the use of digital techniques
The operation of subtraction is just the inverse of addition, if you can do one you can do the other. BTW, are you thinking analog or digital IC? If digital there are ALU IC chips that do both, depending ..
An angiographic record is a visual or digital documentation of blood vessels or organs taken during an angiography procedure. It helps doctors diagnose conditions like blockages or abnormalities in the blood vessels.
A form of digital radiography that delineates blood vessels by subtracting a digitized tissue background image from an image of tissue injected with an intravascular contrast material with a high content of iodine that attenuates x-rays. Abbreviated DSA.
Absence of clear strategy. Shifting customer expectations. Emerging digital skill shortage. Financial limitations and concerns Poor data handling.
because it might output the wrong answer if not used in the right range/may be faulty/basically knowing its limitations
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