Semester 2 Imaging Quality Exam 1

Question 1

Any image acquisition process that produces an electronic image that can be viewed and manipulated on a computer

Answer 1

Digital imaging

Question 2

A square arrangement of numbers / boxes in columns and rows

Answer 2

Matrix

Question 3

Ability of an imaging system to demonstrate small details of an object

Answer 3

Spatial resolution

Question 4

Anything that interferes with the formation of the image

Answer 4

Noise

Question 5

The amount of error that still results in a quality image

Answer 5

Latitude

Question 6

used as a cross reference to transform raw information used to correct values

Answer 6

Look up table

Question 7

Cassette based digital uses storage phosphor plates to produce projection images

Answer 7

Computed radiography

Question 8

Casetteless system uses X-ray absorber material coupled to a flat panel detector or a charge coupled device to form the image

Answer 8

Digital radiography

Question 9

Digital imaging and communications in medicine standard that allows network communication between modality and PACS

Answer 9

DICOM

Question 10

Thin piece of plastic with several layers of material that capture and store image date

Answer 10

Imaging plate

Question 11

Rigid plastic housing for the imaging plate

Answer 11

Casette

Question 12

Produces light when stimulated by light or X-ray photons

Answer 12

Photostimulable phosphor PSP

Question 13

Light produced by a phosphor when stimulated by light or X-ray photons

Answer 13

Photostimulable luminesence

Question 14

Determined by the size and layers of crystals in the film and screen computer radiography system speeds are a reflection of the photo stimulable luminescence given off at the imaging plate while being scanned by laser

Answer 14

Speed

Question 15

Grid line or image noise pattern occurs either when the alignment of the grid to the laser scan direction is incorrect or when spatial frequency is greater than NyQuil frequency wraparound image will result

Answer 15

Moire pattern

Question 16

Amount of exposure received by the image receptor

Answer 16

Exposure index

Question 17

Used to blacking out white collimation borders in a digital image effectively eliminating Veil glare

Answer 17

Shuttering

Question 18

Graphic representation of all of the digitally recorded signals of a digital x-ray exposure

Answer 18

Histogram

Question 19

Grid ratio

Answer 19

Ratio of the height of the Gridline used to the width of the interspace material

Question 20

Number of grid lines per inch

Answer 20

Grid frequency

Question 21

Failure of an imaging system to record densities usually caused by lack of x-ray photons

Answer 21

Quantum mottle

Question 22

Photosensitive receptor and electronics in bedded into a substrate material in a silicone chip act as cameras

Answer 22

Charge couple device

Question 23

Photosensitive array made up of small pixels converts light into electrical charges

Answer 23

Thin film transistor

Question 24

Measurement of how efficiently a system converts an x-ray input signal into useful output image

Answer 24

Detective quantum efficiency

Question 25

The ability of an imaging system to respond to varying levels of exposure

Answer 25

Dynamic range

Question 26

Temporary cessation of breathing especially during sleep

Answer 26

apnea

Question 27

Complete or partial collapse of lung or section of lung

Answer 27

Atelectasis

Question 28

A condition caused by excess fluid in the lungs

Answer 28

Pulmonary edema

Question 29

One or more arteries in the lungs becomes blocked by a blood clot

Answer 29

Pulmonary embolus

Question 30

Surgical removal of lung or part of a lung

Answer 30

Pneumoectomy

Question 31

Invasive procedure to remove fluid or air from the pleural space

Answer 31

Thoracentesis

Question 32

Acquired or hereditary disease of the heart muscle this condition makes it hard for the heart to deliver blood to the body and can lead to heart failure

Answer 32

Cardio myopathy

Question 33

Blockage or closing of a blood vessel or hollow organ

Answer 33

Occlusion

Question 34

Independence or blockage of one or more arteries that supply blood to the heart usually due to atherosclerosis

Answer 34

CAD coronary artery disease

Question 35

A.k.a. heart attack occurs when blood flow to the heart is cut off causing tissue damage

Answer 35

Myocardial infarction MI

Question 36

Excessive localized enlargement of an artery caused by a weakening of the artery wall

Answer 36

Aneurysm

Question 37

Infection that inflamed air sacs in one or both lungs which may fill with fluid

Answer 37

Pneumonia

Question 38

Collection of blood in the space between the chest wall and the lung

Answer 38

Hemothorax

Question 39

Condition occurs when air leaks into the space between the lungs and chest wall

Answer 39

Pneumothorax

Question 40

Difficult or labored breathing

Answer 40

Dysapnea

Question 41

Picture archiving and communication system consists of digital acquisition display workstations and storage devices interconnected through a network

Answer 41

PACS

Question 42

numeric value of exposure received by the receptors in the digital system key value in monitoring a quality radiograph obtained with least amount of those to the patient

Answer 42

S number

Question 43

Occurs when fewer pixels in the neighborhood are included in the signal average the smaller the neighborhood the greater the enhancement

Answer 43

Edge enhancement

Question 44

Directly related to the amount of spatial resolution or detail in the image. Smaller pixel greater the detail

Answer 44

Pixel size

Question 45

How bright or dark the screen image is

Answer 45

Window level