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Rad Technique 2 > Detail > Flashcards

Detail Flashcards

1
Q

Number of bits per pixel affects

A

Contrast

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2
Q

How well one can see small structure in the radiograph

A

Detail /spatial resolution

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3
Q

Sharpness of the structural edges of the image on the radiograph

A

Detail/ spatial resolution

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4
Q

Structures have sharp borders and clearly defined

A

Geometry

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5
Q

Density is sufficient for the eye to distinguish one structure easily

A

Visibility

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6
Q

Factors affecting detail

A

Recorded

Visibility of detail

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7
Q

Defined in the terms of umbra and penumbra

A

Geometric factors

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8
Q

Edge gradient on the film

A

Umbra

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9
Q

Geometric unsharpness of the film

A

Penumbra

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10
Q

Focal “area of the target”

A

Actual focal spot

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11
Q

Smaller the focal spot ________ imag

A

Sharper the image

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12
Q

Determined by the size of filament

A

Focal spot size

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13
Q

Small focal spot measures

A

0.5 - 0.6 mm

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14
Q

Large focal spot measures

A

1mm to 1.2mm

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15
Q

Prvnt an exposure from being made if that exposure exceed the tube loading capacity for he focal spot selcted

A

Safety circuits

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16
Q

The closer the object to the IR

A

Sharper the image

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17
Q

Longer the SID

A

Sharper the image

18
Q

Use of intensifying screen results to

A

Poor detail image

19
Q

Hugher the speed of IS

A

The poorer the detail produced

20
Q

shape of the object affects the sharpness of the structural edge

A

absorption unsharpness

21
Q

greater degree of absorption unsharpness

A

circular objects

22
Q

motion caught on radiograph results to visible blurring of the image

A

motion unsharpness

23
Q

long exposure time greater probability that motion

A

time

24
Q

results when the patient moves during exposure

A

movement of patient

25
Q

there is malfunction in bucky tray that it moves with the movement of grid during exposure

A

movement of image receptor

26
Q

small pixel size produced

A

better spatial resolution

27
Q

number of pixel

A

matrix size

28
Q

field of view is decreased

A

good matrix

29
Q

long SID

A

less magnification

30
Q

short SID

A

great magnification

31
Q

how much size distortion or magnification is demostrated

A

magnification factor

32
Q

MF of 1 indicates

A

no magnification

33
Q

MF of 1.10 means

A

the image is 10% larger

34
Q

change in the shape of the object

A

shape distortion

35
Q

image is longer than the actual shape of the object

A

elongation

36
Q

shorter than the actual shape of the object

A

foreshortening

37
Q

change in size and shape of the object

A

distortion

38
Q

enlargement of the recorded image

A

size distortion or magnification

39
Q

short OID

A

less the magnification

40
Q

longer OID

A

greater the magnification

Rad Technique 2 (8 decks)

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