Image Production- Lange

Front 1

Misalignment of the tube-part-IR relationship results in

Back 1

Shape distortion

Front 2

In digital imaging, brightness is controlled by:

-IR exposure

-monitor functions

-post processing functions

Back 2

Monitor functions and post processing functions

Front 3

An electronic Imaging, as Digital Image Matrix size increases:

-Pixel size decreases

-resolution decreases

-pixel depth decreases

Back 3

Pixel size decreases

Front 4

An algorithm, as used in x-ray Imaging is a

Back 4

Series of variable instructions

Front 5

The chest radiograph shown in figure 4-1 demonstrates

Back 5

Aliasing artifact

Front 6

The intensity of ionizing radiation decreases as

Back 6

Distance from the source of radiation increases

Front 7

Grid interspace material can be made of

-carbon fiber

-aluminum

-plastic fiber

Back 7

-Aluminum

-plastic fiber

Front 8

The reduction in x-ray Photon intensity as the photon passes through material is termed

Back 8

Attenuation

Front 9

Which of the lines indicated represents the dynamic range offered by computed radiography / digital radiography?

Back 9

Line A is representative of CR /DR

Front 10

An increase in kilovoltage will have which of the following effects and digital imaging?

-More scattered radiation will be produced

-the exposure rate will increase

-radiographic contrast will increase

Back 10

-More scattered radiation will be produced

-the exposure rate will increase

Front 11

The X-ray tube used in CT must be capable of

-high-speed rotation

-short pulsed exposures

-withstanding millions of heat units

Back 11

All

Front 12

What is the correct critique of the CR image shown

Back 12

Double exposure

Front 13

If a lateral projection of the chest is being performed on an aesthetic patients and outer photocells are selected, what is likely to be the outcome?

Back 13

Decreased IR exposure

Front 14

Which of the following groups of exposure factors will produce the greatest receptor exposure?

Back 14

400 mA, 70 ms

Front 15

The component of a CR image plate (IP) that records the radiologic image is the

Back 15

Photostimulable phosphor

Front 16

An x-ray image of the ankle was made at 40 SID, 200 mA, 50 ms, 70 kV, 0.6 mm focal spot, and minimal OID. Which of the following modifications would result in greatest increase in magnification?

Back 16

4-in OID

Front 17

The radiation dose received by the digital detector for each image is indicated by the

Back 17

Exposure indicator

Front 18

HVL is affected by the amount of

-kVp

-Beam filtration

-tissue density

Back 18

Kvp

beam filtration

Front 19

The luminescent light emitted by the PSP is transformed into the image seen on the CRT by the

Back 19

ADC

Front 20

The lateral coccyx image shown was made using AEC but is over exposed. This is most likely a result of

Back 20

Incorrect centering of the part

Front 21

Which of the following units is used to express resolution?

-Line spread function

-line pairs per millimeter

-line Focus principle

Back 21

Line spread function

line pairs per millimeter

Front 22

The term windowing describes the practice of

Back 22

Changing the image brightness and/or contrast scale

Front 23

Foreshortening can be caused by

Back 23

The radiographic object being placed at an angle to the IR

Front 24

Acceptable method(s) of minimizing motion unsharpness is (are)

-suspended respiration

-short exposure time

-patient instruction

Back 24

All

Front 25

Using fixed milliampere seconds and variable kilovoltage technical factors, each centimeter increase and patient thickness requires what adjustment in kilovoltage?

Back 25

Increase 2 kV

Front 26

Unopened boxes of radiographic film should be stored away from radiation and

Back 26

In the vertical position

Front 27

Potential Digital Image post-processing tasks include

-PACS

-annotation

-inversion/reversal

Back 27

Annotation

inversion/reversal

Front 28

Factors that contribute to film fog include

-the age of the film

-excessive exposure to safelite

-processor chemistry

Back 28

All

Front 29

X-ray Photon energy is inversely related to

-photo wavelength

-applied milliamperes

-applied kilovoltage

Back 29

Photon wavelength

Front 30

Which of the radiographs is shown most likely required the greater exposure?

Back 30

Image b

Front 31

Characteristics of DR imaging include:

-solid-state detector receptor plates

-a direct-capture imaging system

-immediate image display

Back 31

All

Front 32

Compared with a low-ratio grid, a high-ratio grid will

-allow more centering latitude

-absorb more scattered radiation

-absorb more primary radiation

Back 32

-absorb more scattered radiation

-absorb more primary radiation

Front 33

A decrease in kilovoltage will result in:

-a decrease in image resolution

-a decrease in photon energy

-a decrease in receptor exposure

Back 33

-a decrease in photon energy

-a decrease in receptor exposure

Front 34

What is the correct critique of the CR image shown

Back 34

inverted IP

Front 35

To be suitable for use in an image intensifiers input screen, a phosphor should have which of the following characteristics?

-high conversion efficiency

-high x-ray absorption

-high atomic number

Back 35

all

Front 36

Resolution in CR increases as:

-laser beam size decreases

-monitor matrix size decreases

-PSP crystal size decreases

Back 36

-laser beam size decreases

-PSP crystal size decreases

Front 37

What pixel size has a 512 x 512 matrix with a 20-cm field of view (FOV)?

Back 37

0.40 mm/pixel

Front 38

In radiography of a large abdomen, which of the following is (are) effective way(s) to minimize the amount of scattered radiation reaching the image receptor (IR)?

-use of close collimation

-use of low mAs

-use of a low-ratio grid

Back 38

use of a close collimation