9. Recorded Detail

Question 1

is one of the 2 geometric

properties of image quality.

Answer 1

Recorded detail

Question 2

is the degree of geometric
sharpness or accuracy of the structural lines
actually recorded in the image.

Answer 2

Recorded detail

Question 3

Recorded detail is also referred to as

Answer 3

definition, sharpness, spatial resolution or simply detail

Question 4

is usually quantified and even has derived

unit.

Answer 4

Detail

Question 5

The term _______ is applied to quantified discussions of recorded detail

Answer 5

spatial resolution

Question 6

a radiograph typically does not show soft tissue structures

Answer 6

Spatial Resolution

Question 7

Digital image shows not only the soft tissue but also the edge of the skin

Answer 7

Spatial Resolution

Question 8

Giving the appearance of more detail

Answer 8

Spatial Resolution

Question 9

The primary film/screen unit of resolution is

Answer 9

line pairs per millimeter (lp/mm) or cycles per mm

Question 10

is composed of

pairs of lines a set distance from one another

Answer 10

radiographic resolution tool

Question 11

Digital imaging recorded detail is more commonly called

Answer 11

spatial resolution

Question 12

is determined primarily by matrix size, pixel size,

and gray scale bit depth

Answer 12

Digital imaging recorded detail

Question 13

is usually discussed as high or low

Answer 13

Spatial frequency

Question 14

Shorter wavelength signal (with higher frequency) represents pairs of lines that can be visualized ______

Answer 14

very close together

Question 15

Low frequency spatial resolution as this signal has
longer wavelength (and lower frequency) representing pairs of lines that are \_\_\_\_\_\_

Answer 15

further apart

Question 16

____ radiographic images have less recorded detail

than the object itself

Answer 16

ALL

Question 17

Describes the ability of an imaging system to accurately

display objects in two dimensions.

Answer 17

Spatial Resolution

Question 18

Higher when 2 objects can be demonstrated to be smaller or closer together

Answer 18

Spatial Resolution

Question 19

Spatial resolution for digital images can be expressed in terms of _______ of the image

Answer 19

three dimensions

Question 20

Most medical images use a _______ region of interest in the human body BUT these images contain _______ of information.

Answer 20

two-dimensional,

three-dimensions

Question 21

high spatial resolution

represents a high-frequency signal that is capable of imaging _____ objects

Answer 21

smaller

Question 22

Low spatial resolution represents a lower

frequency signal that can only image _____ objects

Answer 22

large

Question 23

is simply background

information that the image receptor receives

Answer 23

Imaging noise

Question 24

refers to a lack of sufficient incoming data for processing

Answer 24

Quantum Noise

Question 25

the phenomena, Quantum Noise, is also called

Answer 25

Quantum Mottle

Question 26

The solution to the problem (Quantum Mottle/Noise) remains the same – increase the number of incoming signals, whether it requires increasing the _____ of an x-ray beam (the most common solution).

Answer 26

mAs

Question 27

affects the image appearance by demonstrating fine detail structures, often very close to the size limits of the naked eye

Answer 27

Resolution

Question 28

is often not perceived by the beginning student, partially because students must learn to critically examine each image in a methodical manner

Answer 28

Motion unsharpness

Question 29

the primary factors affecting the recorded detail of digital imaging systems are the

Answer 29

Detector geometric properties and | Image processing system

Question 30

detector geometric | properties and the image processing system

Answer 30

Digital Image Receptor Systems

Question 31

Photostimulable phosphor systems are often called

Answer 31

Computed Radiography (CR)

Question 32

have recorded detail limitations very similar to | film/screen intensifying screen phosphor systems.

Answer 32

Photostimulable phosphor systems

Question 33

The major factors that limit photostimulable phosphor systems are the

Answer 33

Intensifying screen and | Scanning system

Question 34

Affects recorded detail because it fails to permit | enough time for a well-defined image to form

Answer 34

Motion

Question 35

under the direct control of the patient.

Answer 35

Voluntary Motion

Question 36

For all patients (children and incognizant adults may be expected in some cases), _______ is the best method of controlling voluntary motion

Answer 36

communication

Question 37

is not under the control of | the patient

Answer 37

Involuntary Motion

Question 38

Difficult to detect

Answer 38

Equipment Motion

Question 39

best method of reducing motion is

Answer 39

Patient communication

Question 40

When the patient is unable to cooperate, the best method is a reduction in _____ with a corresponding increase in _____ to maintain sufficient mA and film density

Answer 40

exposure time, | mA

Question 41

Other methods of decreasing exposure time while maintaining exposure include:

Answer 41

using a higher speed film and screens, | decreasing SID and increasing kVp

Question 42

When communication and exposure time reduction are not sufficient to reduce motion

Answer 42

Immobilization

Question 43

Last resort, human immobilizers may be used to hold the patient in position

Answer 43

1. ) Male relatives 2. ) Female relatives 3. ) Nonradiology hospital personnel 4. ) Nonprofessional radiology personnel

Question 44

mA increase

Answer 44

Density, Contrast, Resolution, and Distortion- Maintains

Question 45

kVp increase

Answer 45

Contrast- Decreases | Density, Resolution, and Distortion- Maintains

Question 46

Film/Screen Speed Increase

Answer 46

Resolution- Decreases | Density, Contrast, and Distortion- Maintains

Question 47

SID decreases

Answer 47

Density and Contrast- Maintains Resolution- Decreases Distortion- Increases