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Radiology > Semester 2 Imaging Quality Exam 1 > Flashcards

Semester 2 Imaging Quality Exam 1 Flashcards

1
Q

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

A

Digital imaging

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2
Q

A square arrangement of numbers / boxes in columns and rows

A

Matrix

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3
Q

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

A

Spatial resolution

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4
Q

Anything that interferes with the formation of the image

A

Noise

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5
Q

The amount of error that still results in a quality image

A

Latitude

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6
Q

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

A

Look up table

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7
Q

Cassette based digital uses storage phosphor plates to produce projection images

A

Computed radiography

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8
Q

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

A

Digital radiography

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9
Q

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

A

DICOM

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10
Q

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

A

Imaging plate

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11
Q

Rigid plastic housing for the imaging plate

A

Casette

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12
Q

Produces light when stimulated by light or X-ray photons

A

Photostimulable phosphor PSP

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13
Q

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

A

Photostimulable luminesence

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14
Q

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

A

Speed

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15
Q

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

A

Moire pattern

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16
Q

Amount of exposure received by the image receptor

A

Exposure index

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17
Q

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

A

Shuttering

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18
Q

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

A

Histogram

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19
Q

Grid ratio

A

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

20
Q

Number of grid lines per inch

A

Grid frequency

21
Q

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

A

Quantum mottle

22
Q

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

A

Charge couple device

23
Q

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

A

Thin film transistor

24
Q

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

A

Detective quantum efficiency

25
Q

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

A

Dynamic range

26
Q

Temporary cessation of breathing especially during sleep

A

apnea

27
Q

Complete or partial collapse of lung or section of lung

A

Atelectasis

28
Q

A condition caused by excess fluid in the lungs

A

Pulmonary edema

29
Q

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

A

Pulmonary embolus

30
Q

Surgical removal of lung or part of a lung

A

Pneumoectomy

31
Q

Invasive procedure to remove fluid or air from the pleural space

A

Thoracentesis

32
Q

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

A

Cardio myopathy

33
Q

Blockage or closing of a blood vessel or hollow organ

A

Occlusion

34
Q

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

A

CAD coronary artery disease

35
Q

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

A

Myocardial infarction MI

36
Q

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

A

Aneurysm

37
Q

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

A

Pneumonia

38
Q

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

A

Hemothorax

39
Q

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

A

Pneumothorax

40
Q

Difficult or labored breathing

A

Dysapnea

41
Q

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

A

PACS

42
Q

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

A

S number

43
Q

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

A

Edge enhancement

44
Q

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

A

Pixel size

45
Q

How bright or dark the screen image is

A

Window level

Radiology (13 decks)

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