Exam 10: Quality Control for Digital Radiography

____ analysis is a time-honored method for assessing and improving quality of imaging operations.

When an exam is scheduled for a particular imaging resource, the RIS makes a list of patients available to the DR ____________________ station.

One of the tasks of the technologist after the DR image is acquired determining whether the image is underexposed or ____________________.

The clinical ____________________ is responsible for equipment life cycle management and is therefore intimately involved in calibrations and service.

A simple ____________________ error in selecting the wrong patient or wrong examination from the worklist creates a condition that may be more difficult to detect than a typographical error.

The DICOM modality worklist (MWL) is a feature designed specifically to take advantage of information that already exists in ____.

Acquiring a ____ image according to the specific conditions of the manufacturer makes it possible to verify uniformity, absence of receptor defects, gain, and the value of the DR exposure indicator.

Because DR receptors are reused, ____________________ arising from receptor defects, dust and debris that interfere with the collection of light for CR and indirect DR systems, and contaminants such as barium contrast will show up on all subsequent images from that receptor until the problem is corrected.

The period of ____________________ is important in deciding upon which indicators of changes in performance we are going to monitor routinely.

If erasure is inadequate, the previous exposure is superimposed as ____.

When the technologist employs nonparallel ____________________, multiple exposure fields on a single cassette-based receptor, or poor centering of the anatomy on the receptor, the algorithm that detects the edges of the radiation field is confounded.

____ arise from interference with the projected x-ray beam, image receptor defects, and interference with conversion of the captured projection into a digital image.

____ includes all those activities undertaken to get an indication of how well the imaging operation is working.

Because verifying every performance parameter before each exam would interfere with clinical operations, periodic measurements assure that the system is properly configured and calibrated and that performance has not ____________________.

____ is reduced by the range of radiation levels that are produced by the range of tissue densities and thicknesses of the anatomy included in the radiographic projection.

Human errors tend to be systematic and predictable.

____________________ in DR causes an increase in quantum mottle and a loss of contrast in dense features.

Radiographic images do not include the patient's name and date of birth; instead, a unique patient identification number is used as the file header.

Automatic rescaling contributes to a common misconception that in DR exposure ____________________ selection is irrelevant to the appearance of the image.

With screen-film radiography, which part of the developed film indicates how much radiation has been used in the examination?