Analysis of Some Factors Affecting Radiographic Density Flashcards

1
Q

Radiographic film OD

A

0-4 OD (clear to black)

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2
Q

Factors affecting OD

A

mAs
kVp
OID
SID
Generator waveform
Part thickness
IR speed
Mass density
Devt time
Collimation
Grid ratio

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3
Q

OD can be controlled by two majot factors:

A

mAs and SID

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4
Q

Lung Mass Density

A

320

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5
Q

Fat Mass Density

A

910

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6
Q

Soft tissue, muscle mass density

A

1,000

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7
Q

Bone mass density

A

1,850

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8
Q

Air mass density

A

1.3

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9
Q

Barium mass density

A

3,500

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10
Q

Iodine mass density

A

4,930

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11
Q

Calcium mass density

A

1,550

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12
Q

Concrete mass density

A

2,350

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13
Q

Mo mass density

A

10 200

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14
Q

Pb mass density

A

11 350

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15
Q

Re mass density

A

12 500

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16
Q

Tungstate

A

19 300

17
Q

Classifying Pathology

Radiolucent (Desctructive)

A

Active TB
Atrophy
Bowel obstruction
Cancer
Degenerative arthritis
Emphysema
Osteoporosis
Pneumothorax

18
Q

Classifying Pathology

Radiopaque (Constructive)

A

Aortic aneurysm
Ascites
Atelectasis
Cirrhosis
Hypertrophy
Metastases
Pleural effusion
Pneumonia
Sclerosis

19
Q

Fat Z

A

6.3

20
Q

Soft Tissue Z

A

7.4

21
Q

Lung Z

A

7.4

22
Q

Bone Z

A

13.8

23
Q

Air Z

A

7.6

24
Q

Iodine Z

A

53

25
Q

Barium Z

A

56

26
Q

Concrete Z

A

17

27
Q

Mo Z

A

42

28
Q

W Z

A

74

29
Q

Pb Z

A

82

30
Q

Ultra high or-hi plus screen relative speed value

A

300

31
Q

High or fast screen relative speed value

A

200

32
Q

Medium, par or standard screen relative speed value

A

100

33
Q

Detail, slow or high resolution screen relative speed value

A

50

34
Q

Ultra-detail screen relative speed value

A

25