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Radiology 122 > L-Spine, SI Joints, Sacrum/Coccyx Projections > Flashcards

L-Spine, SI Joints, Sacrum/Coccyx Projections Flashcards

1
Q

For AP L-Spine (intervertebral Disk) what is the cassette size?

A

14x17

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2
Q

For AP L-Spine (intervertebral Disk) what is the SID?

A

48”

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3
Q

For AP L-Spine (intervertebral Disk) what is the IR?

A

lumbar/sacrum @level iliac crest

lumbar only @ 1.5” above iliac crest

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4
Q

For AP L-Spine (intervertebral Disk) what is the CR?

A

Perpendicular to IR
lumbar/sacrum @level iliac crest
lumbar only @ 1.5” above iliac crest
(Patient has elbows/hip/knees flexed)

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5
Q

For AP L-Spine (intervertebral Disk) what is the breathing instructions?

A

suspend at end of expiration (relaxes back)

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6
Q

For AP L-Spine (intervertebral Disk) what is the collimation?

A

lumbar/sacrum-8x17

lumbar only-8x14

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7
Q

For AP L-Spine (intervertebral Disk) what is the criteria?

A

symmetric vertebrae
spinous process centered
SI joints equidistant
open intervertebral disk spaces

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8
Q

For Lateral L-Spine (intervertebral foramen) what is the cassette size?

A

14x17

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9
Q

For Lateral L-Spine (intervertebral foramen) what is the SID?

A

40”

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10
Q

For Lateral L-Spine (intervertebral foramen) what is the IR?

A

lumbar/sacrum @level iliac crest

lumbar only @ 1.5” above iliac crest

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11
Q

For Lateral L-Spine (intervertebral foramen) what is the CR?

A

Perpendicular enters MCP
lumbar/sacrum @level iliac crest
lumbar only @ 1.5” above iliac crest

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12
Q

For Lateral L-Spine (intervertebral foramen) what is the breathing instructions?

A

suspend at end of expiration

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13
Q

For Lateral L-Spine (intervertebral foramen) what is the collimation?

A

lumbar/sacrum-8x17

lumbar only-8x14

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14
Q

For Lateral L-Spine (intervertebral foramen) what is the criteria to be met?

A

superimposed posterior margins of vertebral body
superimposed crest
spinous process in profile
open intervertebral disk spaces and foramen

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15
Q

For Lateral L5-S1 “Spot” (Lumbosacral Junction) what is the cassette size?

A

10x12

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16
Q

For Lateral L5-S1 “Spot” (Lumbosacral Junction) what is the SID?

A

40”

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17
Q

For Lateral L5-S1 “Spot” (Lumbosacral Junction) what is the IR?

A

Center to central Ray

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18
Q

For Lateral L5-S1 “Spot” (Lumbosacral Junction) what is the CR?

A 
center in coronal plane 
2"posterior to ASIS and 1.5" below iliac crest
if not horizontal angle CR 
male: 5 degrees caudal
female: 8 degrees caudal
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19
Q

For Lateral L5-S1 “Spot” (Lumbosacral Junction) what is the breathing instructions?

A

suspend

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20
Q

For Lateral L5-S1 “Spot” (Lumbosacral Junction) what is the collimation?

A

6x8

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21
Q

For Lateral L5-S1 “Spot” (Lumbosacral Junction) what is the criteria to be met?

A

lumbosacral joint in center
open intervertebral disk space
crest are superimposing

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22
Q

For AP Oblique RPO/LPO (Zygapopyseal Joints) what is the cassette size?

A

14x17

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23
Q

For AP Oblique RPO/LPO (Zygapopyseal Joints) what is the SID?

A

40”

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24
Q

For AP Oblique RPO/LPO (Zygapopyseal Joints) what is the IR?

A

center to central ray

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25
Q

For AP Oblique RPO/LPO (Zygapopyseal Joints) what is the CR?

A

Lumbar- 2” medial to ASIS and 1-1.5” above iliac crest
L5-SI- 2” medial to ASIS and midway between ASIS and iliac crest

Patient will be at 45 angle for joints closest to IR
60 angle for L5-S1 zygapopyseal joint

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26
Q

For AP Oblique RPO/LPO (Zygapopyseal Joints) what is the breathing instructions?

A

suspend at end of expiration

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27
Q

For AP Oblique RPO/LPO (Zygapopyseal Joints) what is the collimation?

A

9x14

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28
Q

For AP Oblique RPO/LPO (Zygapopyseal Joints) what is the criteria to be met?

A 
zygapopyseal joint CLOSEST to IR open 
joint not well seen
 Pedicle anterior= not rotated enough
pedicle posterior= rotated too much
vertebral column parallel
T12-L1 and L1-L2 intervertebral joint open
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29
Q

For PA Oblique RAO/LAO (Zygapopyseal Joint) what is the cassette size?

30
Q

For PA Oblique RAO/LAO (Zygapopyseal Joint) what is the SID?

31
Q

For PA Oblique RAO/LAO (Zygapopyseal Joint) what is the IR?

A

center to central ray

32
Q

For PA Oblique RAO/LAO (Zygapopyseal Joint) what is the CR?

A

Lumbar- enter elevated side 2” lateral to palpable spinous process and 1-1.5” above crest
L5-S1- 2” lateral spinous process and midpoint between iliac crest and ASIS

Patient in 45 degree angle to show zygapopyseal joint
or 60 degree angle for L5-S1

33
Q

For PA Oblique RAO/LAO (Zygapopyseal Joint) what is the breathing instructions?

A

suspend at end of expiration

34
Q

For PA Oblique RAO/LAO (Zygapopyseal Joint) what is the collimation?

35
Q

For PA Oblique RAO/LAO (Zygapopyseal Joint) what is the criteria to be met?

A 
zygapopyseal joints FARTHEST from IR
if joint not seen well
anterior=not rotated enough
posterior= rotated too much
intervertebral joint spaces open
36
Q

For AP/PA Axial “Ferguson” (SI/Lumbosacral junction) what is the cassette size?

37
Q

For AP/PA Axial “Ferguson” (SI/Lumbosacral junction) what is the SID?

38
Q

For AP/PA Axial “Ferguson” (SI/Lumbosacral junction) what is the IR position?

A

center to central ray

39
Q

For AP/PA Axial “Ferguson” (SI/Lumbosacral junction) what is the CR?

A

at 1.5” above pubic symphysis (greater trochanter) or 2-2.5 “ below ASIS
Angle cephalic
male: 30 degree
female 35 degree

40
Q

For AP/PA Axial “Ferguson” (SI/Lumbosacral junction) what is the breathing instructions?

41
Q

For AP/PA Axial “Ferguson” (SI/Lumbosacral junction) what is the collimation?

42
Q

For AP/PA Axial “Ferguson” (SI/Lumbosacral junction) what is the criteria to be met?

A

lumbosacral junction seen
open intervertebral disk spaces between L5-S1
Both SI joints

43
Q

For AP Oblique RPO/LPO (SI joints) what is the cassette size?

44
Q

For AP Oblique RPO/LPO (SI joints) what is the SID?

45
Q

For AP Oblique RPO/LPO (SI joints) what is the IR?

A

@ level of ASIS

46
Q

For AP Oblique RPO/LPO (SI joints) what is the CR?

A

center 1” medial to elevated ASIS

Patient in 25-30 degree rotation

47
Q

For AP Oblique RPO/LPO (SI joints) what is the breathing instructions?

48
Q

For AP Oblique RPO/LPO (SI joints) what is the collimation?

49
Q

For AP Oblique RPO/LPO (SI joints) what is the criteria to be met?

A

SI joint FARTHEST from the IR (elevated side demonstr)
Open SI joint
Joint centered

50
Q

For PA Oblique RAO/LAO (SI Joints) what is the cassette size?

51
Q

For PA Oblique RAO/LAO (SI Joints) what is the IR?

A

@ level of ASIS

52
Q

For PA Oblique RAO/LAO (SI Joints) what is the CR?

A

centered 1” medial to ASIS

Patient in a 25-30 angle

53
Q

For PA Oblique RAO/LAO (SI Joints) what is the breathing instructions?

54
Q

For PA Oblique RAO/LAO (SI Joints) what is the collimation?

55
Q

For PA Oblique RAO/LAO (SI Joints) what is the criteria met?

A

open SI joints CLOSEST to the IR

joint centered

56
Q

For PA Oblique RAO/LAO (SI Joints) what is the SID?

57
Q

For AP/PA Axial (Sacrum/Coccyx) what is the Cassette size?

58
Q

For AP/PA Axial (Sacrum/Coccyx) what is the SID?

59
Q

For AP/PA Axial (Sacrum/Coccyx) what is the IR?

A

center to CR

60
Q

For AP/PA Axial (Sacrum/Coccyx) what is the CR?

A

Supine Sacrum: 15 cephalic, 2”above pubic symphysis
Prone Sacrum: 15 caudal, center to sacral curve
Supine Coccyx: 10 caudal, 2”above pubic symphysis
Prone Coccyx: 10 cephalic, center to coccyx

61
Q

For AP/PA Axial (Sacrum/Coccyx) what is the breathing instructions?

62
Q

For AP/PA Axial (Sacrum/Coccyx) what is the collimation?

A

sacrum: 10x12
coccyx: 8x10

63
Q

For AP/PA Axial (Sacrum/Coccyx) what is the criteria met?

A

sacrum: centered free of foreshortening
pubic bone not overlapping
coccyx: centered
segments not superimposed no rotation

64
Q

For Lateral (Sacrum/Coccyx) what is the cassette size?

65
Q

For Lateral (Sacrum/Coccyx) what is the SID?

66
Q

For Lateral (Sacrum/Coccyx) what is the IR?

A

Center to CR

67
Q

For Lateral (Sacrum/Coccyx) what is the CR?

A

sacrum: level of ASIS and 3.5” posterior
coccyx: 3.5” posterior to ASIS and 2” below

68
Q

For Lateral (Sacrum/Coccyx) what is the breathing instructions?

69
Q

For Lateral (Sacrum/Coccyx) what is the collimation?

A

sacrum: 10x12
coccyx: 6x8

70
Q

For Lateral (Sacrum/Coccyx) what is the criteria?

A

sacrum and coccyx shown

superimposed ischia and ilia

Radiology 122 (18 decks)

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