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Rad positioning extremities > Lower Extremity 1 > Flashcards

Lower Extremity 1 Flashcards

1
Q

how big must the body part be to use the bucky?

A

11 cm or more

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2
Q

breathing instructions for lower extremity

A

don’t breathe, don’t move

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3
Q

true AP position for femur, knee, leg and ankle

A

knee extended
foot dorsi-flexed
leg internally rotated 5 degrees (2nd toe pointed up)

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4
Q

positioning for pelvis and AP hip. why?

A

legs internally rotated 15 degrees
prevents femoral neck foreshortening
places greater trochanter in profile

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5
Q

AP pelvis CR

A

1 1/2” above the crest for the top of the film

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6
Q

AP pelvis cassette size and orientation

A

14x17

upright or table bucky (vertical)

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7
Q

collimation AP pelvis

A

film size

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8
Q

ID blocker AP pelvis

A

toward feet

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9
Q

labels for AP pelvis

A 
iliac crest
sacro iliac joint
acetabulum
femoral head
greater trochanter
femoral neck
symphysis pubis
obturator foramen
superior pubic ramus
coccyx
sacrum
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10
Q

measurement for AP sacrum

A

A-P at mid-pelvis (between ASIS and PS)

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11
Q

CR for AP sacrum

A

perpendicular to sacrum

15 degree cephalic tube tilt

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12
Q

film size and orientation

A

10x12

vertical

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13
Q

shield for AP sacrum?

A

no

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14
Q

breathin instructions for AP sacrum

A

don’t breathe

don’t move

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15
Q

labels for AP sacrum

A

sacral foramina
sacroiliac joint
symphysis pubis

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16
Q

lateral sacrum film size and orientation

A

10x12

vertical

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17
Q

CR for lateral sacrum

A

3: below crest and 1” posterior to midaxillary line

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18
Q

shield for lateral sacrum?

A

no

19
Q

measurement for AP coccyx

A

AP at mid pelvis

20
Q

collimation for AP coccyx

A

4x4

21
Q

film size and orientation for AP coccyx

A

10x12

vertical

22
Q

tube tilt for AP coccyx

A

10 degree caudal tube tilt

23
Q

labels on an AP coccyx

A

ischial spine
coccyx
symphysis pubis

24
Q

measurement for lateral coccyx

A

same as lateral sacrum

25
Q

CR for lateral coccyx

A

2” posteiror to greater trochanter

26
Q

sacrum/coccyx combo series

A

AP sacrum
AP coccyx
lateral sacrum and coccyx combo

27
Q

how do you measure for a sacrum/coccyx combo?

A

measure as for lateral sacrum

28
Q

film size and orientation for sacrum/coccyx combo

A

10x12

vertical

29
Q

what is the special thing you have to do for the sacrum/coccyx combo?

A

load cassette with 2 films or
filter coccyx or
adjust image digitally

30
Q

CR location for AP hip

A

hip joint
medial from top of greater trochanter
on inguinal crease
align entire leg along center of table

31
Q

patient positioning for AP hip

A

leg internally rotated 15 degrees

32
Q

cassette size and orientation for AP hip

A

10x12

lengthwise

33
Q

frogleg lateral hip labels

A

crest
femoral head
greater trochanter
lesser trochanter

34
Q

film size and orientation for frog leg lateral hip

A

10x12

lengthwise

35
Q

patient orientation for frog leg lateral hip

A

flex affected knee, abduct thigh

36
Q

femur xrays must include what?

A

knee

37
Q

true AP position for lower extremity

A

knee extended
foot dorsiflexed
leg internally rotated 5 degrees
cassette goes in the table of the bucky

38
Q

AP femur label

A 
femur
patella
medial condyle
lateral condyle
tibia
39
Q

cassette size and orientation for AP femur

A

14x17

lengthwise

40
Q

patient orientation blockers in general

A

ankle and up- toward ankle

foot- toward knee

41
Q

CR for AP femur

A

bottom of film 1/2” below apex of patella

CR to mid film

42
Q

lateral femur labels

A

femur
condyles
patella
tibia

43
Q

film size and orientation for lateral femur

A

14x17

lengthwise

44
Q

patient orientation for lateral femur

A

roll patient onto affected femur and flex knee (femur in lateral position)

Rad positioning extremities (8 decks)

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