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Xray positioning > Final > Flashcards

Final Flashcards

1
Q

every 5 degrees of tube tilt you have to move the tube

A

forward 1 inch

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2
Q

CR for AP thoracic is directed where

A

T6

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3
Q

“ten day rule”

A

during 10 after onset of menstration

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4
Q

CR for a vertex

A

film tilt 25-35*
C1
center

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5
Q

max energy of a photon in xray

A

kvp

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6
Q

most to least radioopaque

A

metal, bone, water, fat, air

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7
Q

maintain constant radiographic density on film with

A

inc 15% kvp

dec mAs 1/2

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8
Q

intensifying screen is in the

A

cassette

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9
Q

what does not protect against radiation

A

grid

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10
Q

scatter increases when what increases

A

kvp

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11
Q

function of filter

A

remove soft xray

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12
Q

radiographic contrast

A

tonal relationship between one density and another

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13
Q

type of radiation major constituent emitted from target

A

bremsstrahlung

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14
Q

sacrum and coccyx AP view different why

A

different angles

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15
Q

electrostatic law

A

electron repel another electron

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16
Q

OID decrease

A

image magnification directly decreases

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17
Q

interaction between xray photons and matter most significant to patient dose

A

photoelectric effect

18
Q

what kind of pelvic angle does and male have

A

acute

19
Q

thorasic vert on pt with sig scoliosis best seen how

A

convexity closest to the film

20
Q

collimnation is important to

A

increase contrast

decrease pt exposure

21
Q

CR L5/S1 sacrum coccyx AP projection

A

perpendicular to plane of object to be radiographed

22
Q

lat sacrum veiw tube tilt

A

zero*

23
Q

rule out spondlyo using what view

A

lat L5/S1 spot

24
Q

mAs control what in the beam

A

photon

25
Q

z joint on cervical spine best visualized on what view

A

lateral cervical

26
Q

angle of the jaw is at what level

A

C3

27
Q

vertebral prominence is at what level

A

C7

28
Q

episternal notch is at what level

A

T2-T3

29
Q

umbilicus is at what level

A

L3-L4

30
Q

thyroid cartilage is at what level

A

L5

31
Q

PSIS is at what level

A

S2

32
Q

inferior angle of the scapula is at what level

A

T6

33
Q

major advantage of the AP lumbopelvic view taken PA on large patient

A

more uniform rad density compensation

34
Q

swimmers view visualizes

A

C6-T2

35
Q

flex/ext projection same SID as lateral b/c

A

better comparison structure size from film to film

36
Q

principle factor control xray pnentration

A

kilovolts

37
Q

increse image quality decrease rad dose=

A

fixed kvp variable mAs and constant density

38
Q

lat cerv f/e view taken when

A

lig stability damage

39
Q

IVF of lumbar spine best seen how

A

lat view

40
Q

best tech factors for xray projection to avoid blur

A

high ma with shortest time

41
Q

CR lat cervical f/e

A

C4 72in SI

42
Q

pt exhale and hold why on lateral cerviacl

A

get the shoulder out of the way

Xray positioning (1 decks)

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