Exam 3: Computed Radiography: Physics and Technology

Which of the following deals specifically with quality assessment, continuing education, the usefulness of quality control procedures, and the assessment of outcomes?

A(n)____________________ can be defined as a distortion or error in an image that is unrelated to the subject being studied.

Which cycle basically consists of at least three steps: X-ray exposure of the IP, readout of the exposed IP, and erasure of the IP?

Which of the following refers to the use of several digital operations for pre-processing and post-processing of the CR image data?

Which tool provides visual evaluation of high contrast resolution, low contrast resolution, and artifacts, using appropriate QC software?

Which of the following CR systems incorporates a single fixed IP encased in a special housing that forms a stationary part of the unit?

Which image quality descriptor of a digital image is related to the size of the pixels in the image matrix?

Laser scanning produces a luminescence (light)that is proportional to the stored ____________________.

What leads to image artifacts?

In general, the greater the bit ____________________, the better the density resolution of the image.

X-ray exposure of the IP causes it to fluoresce (emit light when it is exposed to X-rays)for an extended duration.

The ____ descriptor takes into consideration not only the signal-to-noise ratio (SNR)but also the system noise, and therefore includes a measure of the amount of noise added.

The fundamental problem with high exposures is that of increased ____________________ dose to the patient.

Post-processing deals with shading corrections, pattern recognition, and exposure field recognition.

Which CR QC test is used to assess the uniformity of the recorded signal from a uniformly exposed imaging plate?

To render the latent image visible, the PSP must be scanned by a laser beam of a specific wavelength.

Quality control (QC)is a component of QA and refers specifically to the ___________________ of important variables that affect image quality and radiation dose.

It was in 1983 that commercialization of CR imaging systems for use in diagnostic radiology began, when ____________________ introduced their FCR-101 unit.

When the radiation exposure is high, film is underexposed and the image is light and is not acceptable.

The ____________________ allows the technologist to do any post-processing on images before they are communicated to the PACS for storage.