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A method of digital image subtraction in which the frame that contains the greatest amount of contrast material in vessels is identified and is then subtracted from all subsequent images.  Live fluoroscopic images of the catheter moving through the vasculature can then be seen even after the vessels contain less contrast defines _____.

Calculate the size of geometric unsharpness for an image taken with a 2.0-mm focal spot, at a 72 inch SID and an OID of 6 inches.

Match each description with the corresponding image intensifier component.  Each response may be used more than once.

Which of the following are true regarding fluoroscopic units? The cumulative timer is audible and will active after 5 minutes of fluoroscopic time The control switch must be of the dead-man type The primary protective barrier of 1.5 mm lead equivalent is required

Which of the following materials may be used as the interspace material for radiographic grids? Plastic fiber Aluminum Lead

Which of the following is not a component of a light-localizing variable-aperature collimator?

Which of the following accurately describes a trough filter?It is also called a ferlic filterIt is used in some dedicated chest unitsIt is thick in the center and thinnest laterally

The light radiation field congruence is required to be _____ of the SID.

Which type of digital imaging artifact is demonstrated below? Moire effect 3.jpg

Which of the following are true in regards to ABC? ABC stands for Actual Brightness Calculation The ABC increases or decreases mA to compensate for various body thickness The purpose of ABC is to maintain image density and contrast at a constant brightness Rapid changes in body thickness can cause the ABC to lag behind