Exam 1: Digital Radiography: An Overview

An important element of image and data communications is that of ____________________.

A major drawback of CR systems is their limited ability to image detail, also known as ____________________.

Which of the following makes use of photostimulable or storage phosphors to produce digital images using existing X-ray imaging equipment?

The film contrast can be described by what is popularly known as the ____________________ or the Hurter-Driffield (H and D)curve.

The film gamma refers to the sensitivity of the film to radiation.

A major feature of workstations is that they allow users to perform digital post processing of images for the purpose of enhancing ____________________.

Which digital radiography modality requires a great deal of special technical considerations in order to detect breast cancer?

The conversion of analog signals into digital data is the function of the ____________________.

In the production of film-based radiographic images, X-rays pass through the patient and fall upon the film to form a(n)____________________.

The purpose of image compression is to increase storage space and decrease the image transmission time.

The detector in digital fluoroscopy is also the ____, since it captures the radiation passing through the patient.

The digital detectors used in CR and flat-panel digital radiography have a characteristic response to radiation exposure that is fundamentally different to the ____________________.

The application of digital fluoroscopy to angiography is referred to as ____________________.

Which of the following involves the use of computer technology coupled with communications technology to solve problems in society, including medical imaging and health care?

Digital radiography imaging modalities include communication radiography (CR), flat-panel digital radiography (DR), digital mammography (DM), and digital fluorescence (DF)and the laser film digitizer.

The application of information technology to medical imaging is referred to as ____________________.

If the radiation exposure is too ____, the film is overexposed and the processed image appears too ____ and the radiologist cannot make a diagnosis from such an image.

Since the PACS contains confidential patient data and information, it is essential that they be secured; hence, ____ is of central importance in a digital hospital as well as in a PACS environment.

A high-end computer is the heart of the PACS system.

Which of the following is one important objective descriptor of digital image quality?