Test 2 (Bush) C17-22

Question 1

A digital display monitor is best viewed ______________.

Answer 1

straight on

Question 2

Almost all digital images in medical imaging are viewed and interpreted on a __________________.

Answer 2

digital display device

Question 3

The ambient light at a digital image workstation should be ______________.

Answer 3

near darkness

Question 4

T or F: The purpose of image subtraction is to enhance contrast.

Answer 4

true

Question 5

T or F: Spatial resolution improves with the use of higher megapixel digital display devices.

Answer 5

true

Question 6

PACS stands for _______________________________________.

Answer 6

Picture Archiving and Communication Systems

Question 7

Which is not a part of PACS?

Answer 7

Electronic medical record

Question 8

Radiology Information Systems (RIS) is used for which of the following?

Answer 8

Schedules, protocol descriptors, and diagnostic conclusions

Question 9

Within a PACS network the secretarial workstation and the viewing workstation would both be called ________________.

Answer 9

clients

Question 10

The process of remote transmission and viewing of medical images is known as ________________.

Answer 10

teleradiology

Question 11

The national standard for image transmission in teleradiology is the ____________ format.

Answer 11

DICOM

Question 12

The term network is used to describe the _____________.

Answer 12

manner many computers can be connected

Question 13

What does DICOM stand for?

Answer 13

Digital Imaging and Communications in Medicine

Question 14

T or F: Teleradiology allows for intercontinental image interpretation.

Answer 14

true

Question 15

T or F: The Current Procedural Terminology (CPT codes), developed by the American Medical Association (AMA), created codes for a specific clinical situation.

Answer 15

true

Question 16

Accession Numbers are specific numbers that are assigned to a patients exam they are attached to each ___________ in that exam which in turn attaches a ___________ to that specific patients exam after a radiologist has performed their dictated interpretation.

Answer 16

image , report

Question 17

Image perception is a scientific term for what we call visual ______________.

Answer 17

sensitivity

Question 18

The decreasing luminous intensity with increasing distance from the source of light follows _____________________.

Answer 18

the inverse square law

Question 19

A principal advantage of digital imaging over analog imaging is ____________________.

Answer 19

image brightness

Question 20

Light incident on the eye must first pass through the _________________.

Answer 20

cornea

Question 21

The interpretation of a digital medical image by a radiologist is a two-step process; _________________ followed by ______________.

Answer 21

global impression; visual search

Question 22

The process of matching any worker to the work environment to maximize efficiency is ______.

Answer 22

ergonomics

Question 23

Digital radiography is superior to analog radiography because of __________________.

Answer 23

image brightness

Question 24

SMPTE stands for the _____________________________________.

Answer 24

Society of Motion Picture and Television Engineers

Question 25

A standard pattern made to measure the resolution of digital display systems is called the _______________________.

Answer 25

SMPTE pattern

Question 26

The standard for Digital Imaging and Communication was developed by a committee of the ______________.

Answer 26

ACR and NEMA

Question 27

There are _______ types of photometers commonly used.

Answer 27

two

Question 28

A photometer is a _____________________.

Answer 28

luminescence meter

Question 29

A high-quality medical image should always demonstrate ____________.

Answer 29

structures and tissues

Question 30

Spatial resolution improves with decreased

Answer 30

focal spot size, motion and pixel size.

Question 31

_________ is defined as the ability to distinguish anatomical structures of similar subject contrast and visually detect one from the other.

Answer 31

Contrast resolution

Question 32

Radiographic __________ is random fluctuation of x-ray interaction on the image receptor.

Answer 32

noise

Question 33

Which of the following is the principal contributor to image noise in radiographic and fluoroscopic imaging procedures?

Answer 33

Quantum mottle

Question 34

Which of the following will reduce quantum mottle?

Answer 34

High mAs, low kVp, and slower image receptors

Question 35

Higher speed image receptors generally produce images with ____________________.

Answer 35

increased noise

Question 36

The three primary geometric factors affecting image quality are ________________________.

Answer 36

magnification, distortion, and focal spot blur

Question 37

What is the formula for the magnification factor?

Answer 37

MF = SID/SOD

Question 38

The best way to minimize magnification is to use a __________.

Answer 38

long SID and small OID

Question 39

Focal spot blur can be reduced by using __________.

Answer 39

a small focal spot

Question 40

Subject contrast is affected by ___________.

Answer 40

patient thickness

Question 41

Distortion can be reduced by ____________________________.

Answer 41

placing the object plane perpendicular to the image plane

Question 42

Focal-spot blur is small on ______________ side and large on the ___________ side of the image receptor.

Answer 42

anode; cathode

Question 43

Image-forming x-rays include those which have been _________________.

Answer 43

transmitted without interaction and scattered through Compton interaction

Question 44

Which kVp selection would result in the most scattered x-rays in the image-forming beam?

Answer 44

90 kVp

Question 45

Compton scatter contributes to _____________.

Answer 45

image noise

Question 46

The three primary factors influencing the intensity of scatter in the image-forming beam are ___________________.

Answer 46

kVp, field size, and patient thickness

Question 47

Decreasing the kVp will increase ___________.

Answer 47

patient dose

Question 48

The x-rays that are transmitted through the patient without interaction contribute to ______________.

Answer 48

useful information

Question 49

Contrast resolution is improved by _____________.

Answer 49

tight collimation, lowering kVp and patient compression

Question 50

The most commonly used beam restricting device is the ____________.

Answer 50

variable collimator

Question 51

Lowering kVp ________ patient dose and _________ image contrast.

Answer 51

increases; increases

Question 52

The use of __________ improves contrast and reduces patient dose.

Answer 52

collimation

Question 53

How can you improve image contrast with a heavy patient without increasing patient dose?

Answer 53

Use tight collimation.

Question 54

Scatter radiation increases as ___________________ increases.

Answer 54

field size

Question 55

The use of a compression device will increase __________.

Answer 55

image contrast