Exam 4: Effective Use of Computed Radiography

Because of their wide dynamic range, PSP plates are much more susceptible to ____________________ than are conventional film-screen systems.

The accuracy of the exposure indicators depends on accurate reader calibration and appropriate exposure field recognition.

____ are much more susceptible to fogging than are conventional film-screen systems.

If there is any question about how long it has been since the plate has been though the read/erase cycle, one should erase the plate, especially if ____________________ images are being performed.

With CR, grid cutoff does not result in a light image, due to the automatic ____________________ of the image.

Many of the factors that cause low contrast in film-screen systems also cause low contrast in CR images.

Since the grid strips are oriented in the direction of grid tilt, grid cutoff is more likely to occur.

With screen/film imaging, the ____________________ of the effect of technical factors is normally based on the image appearance rather that on the physics behind the appearance.

If the exposure is >100% above the optimal signal level, the ALARA principle is violated, and the extra scatter generated will degrade the ____________________.

____ occurs when a large number of the pixels will be at the maximum digital value (black) so that there is no signal difference in the very high exposure areas, resulting in a loss of anatomical structures in that region.