Display systems

On a display monitor, by zooming in repeatedly on a high resolution image, at some level of magnification it is certain that _______________ will occur.

aliasing artifacts

The dynamic range of the display system is usually _______ that of the computer image processing system.

Much less than

By far, the weakest link in the entire radiographic imaging chain is the:

display monitor

A digital to analog converter (DAC) is used between which two stages of the imaging chain?

Storage and display

The heart of the PAC system, which directs all data, is a.....

Server

A jukebox contains 100 or more:

discs

The standard high-level language used to interface between all different brands of medical imaging equipment is known as:

DICOM

The Digital Imaging and Communication in Medicine standard specifies the ________ of various devices

transmission behavior

All of the following are DICOM commands except:

a) query

b) retrieve

c) get work list

d) window level

e) DICOM print

d) window level

Key items of interest to caregivers are made easily accessible at the touch of a button while the image is displayed, as a DICOM:

Header

Each line of information in the metadata begins with a DICOM __________ number

tag ID

For internet access, confidentiality must be protected with __________ software:

Encryption

Lossless compression ratios used for medical diagnosis are defined as ratios:

less than 8:1

For CR, DR, CT, MRI, NM and US units, images are usually erased ______ after acquisition:

24 hours

Images are usually erased from storage after 5 days for:

radiologists' workstations

Within a PACS server, storage using jukeboxes in a separate location would be classified as _________ storage:

archive

The ability of a PAC system to automatically search the HIS and RIS for previous images and records for patients scheduled the following day is known as:

prefetching

To preserve image quality and manipulation features when images are sent to clinical sites, DICOM _______ should be included on CDs or DVDs:

viewers

The software standard for exchanging electronic text information between departments and institutions in a compatible format is:

HL7

A true DICOM header is displayed as a bar:

at the top of the displayed image

Which of the following is defined as the effective use of medical data and information to improve the management and integration of images, efficiency, accuracy, and real time interactive functionality of imaging services:

Medical imaging informatics

Standardization of the way health information is retrieved, exchanged, integrated and shared is achieved by:

The Health Level Seven standard

The electronic version of a patients chart, used by a particular healthcare provider, is the:

electronic medical record

All of the following are essential components of security for medical records and information except:

Internet Protocol (IP)

Health Insurance Portability and Accountability Act (HIPAA) holds all healthcare providers accountable to maintain each patient's________

Privacy

An institution's unique way of identifying a specific procedure or exam on a particular patient is the procedures ____________

Accession number

The "umbrella" computer system that integrates all information flow within a hospital or clinic is the:

HIS

The link that transfers patient information between image acquisition stations and the RIS or HIS is a:

DICOM modality worklist

The DICOM standard was developed to ensure:

compatibility between medical systems that store information