Exam 21: Digital Radiographic Artifacts

Creating distinctly collimated margins on all four sides of a DR image is important in preventing ____________________ errors.

Lossless compression reduces data files ______.

The three classifications of digital imaging artifacts are _______________________.

Each anatomical part has an image histogram with a(n) _______________ shape.

__________________ is done during preprocessing to correct for an irregular pattern over the image.

A graph of the frequency of occurrence versus digital value intervals is called a(n) ________________.

The software correction that equalizes the response of each pixel to a uniform exposure of x-rays is called _______________.

The size and number of digital images has to be compressed to permit ___________.

Which is/are done to the image during preprocessing? I.Lossless compression II.Partitioning III.Flatfielding

Artifacts are an acceptable part of digital imaging.

A ghost image can occur in digital imaging because of ____________________.

Backscatter radiation artifacts can occur more readily in digital imaging because of the ____________________.

The largest standard size for a digital imaging plate is _____________.

Lossy compression reduces data files ______.

Object artifacts in digital imaging can occur from errors in ___________________. I. x-ray beam collimation II) histogram selection III) patient positioning

Computer aided diagnosis (CAD) requires the use of ______________________.

Histogram selection is done ____________________________.

Computed radiography cassettes can sit for ____________ between exposures.

What size is the average CR or DR image file?

Lossy compression can be used for ____________________.