Exam 1: Digital Radiography: An Overview

Two standards that are currently used in a PACS environment are the DICOM and ____________________.

The major components of PACS include image acquisition devices, a PACS computer, devices called interfaces, and display workstations, all of which are connected and linked to the HIS and RIS through digital communication networks.

The output of computer processing, or the ____, must first be converted into an analog signal before it can be displayed on a monitor for viewing by the observer.

One of the major problems with the ____________________ process is poor image quality if the initial radiation exposure has not been accurately determined.

While DICOM is concerned primarily with images from the digital image acquisition modalities, HL-7 is concerned mainly with textual information from the ____ and ____.

____ is used to describe the degree of film blackening as a result of radiation exposure, and it can be measured by a densitometer.

Quality assurance and ____ procedures are effective strategies to ensure continuous quality improvement of a product.

In order to change a(n)____ (optical range and contrast), an additional set of exposure technique factors must be used, thus increasing the dose to the patient from repeated exposures.

Film-based imaging is limited in its ____________________.

One of the significant differences between CR and film-screen radiography is that the exposure latitude of CR is about 104 times wider than that of the widest range of ____________________.

A digital fluoroscopy system consists of very few of the imaging components found in a conventional fluoroscopic imaging system.

While radiography produces static images, fluoroscopy produces dynamic images acquired in real time to allow for the study of motion of organ systems and ____________________.

Which of the following serve to display images on a monitor for the purpose of image interpretation?

As a radiation detector, film-screen cannot show differences in tissue contrast less than ____.

The digital detector output signal is linear with the input radiation exposure.

Which major technical component of a digital radiography system refers to the collection of X-rays transmitted through the patient?

As a display medium, the optical range and contrast for film are ____________________ and limited.

The term ____, as used in this book, refers to projection radiography, whereby computers process data collected from patients using special electronic detectors that have replaced the X-ray film cassette.

For digital radiography, special electronic (digital)detectors are used that replace the X-ray film cassette used in film-based radiography.

Film-screen radiography has been the workhorse of radiology ever since the discovery of X-ray by W.C.Roentgen in 1895.