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Flashcards in General Structure Analysis Normals Deck (55)
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1
Q

sella turcica A-P range

A

5-16mm

2
Q

sella turcica A-P avg

A

11 mm

3
Q

sella turcica S-I range

A

4-12mm

4
Q

sella turcica S-I avg

A

8 mm

5
Q

sella turcica indicates

A

enlargement/ space occupying lesion of the pituitary

6
Q

ADI normal adult range

A

1-3 mm

7
Q

ADI normal child range

A

3-5 mm

8
Q

ADI measurement indicates

A

instability between atlas and axis b/c instability of transverse lig

9
Q

cause of enlarged ADI children

A

infection

10
Q

cause of enlarged ADI adults

A

RA

11
Q

where is George’s line drawn

A

along posterior aspect of vert bodies to observe the cervical curve

12
Q

where is the posterior cervical line drawn

A

on the most convex portion of the spinolaminar junction lines

13
Q

what is happening when you measure the sagittal dimensions of the spinal canal
what does it indicate

A

measure between george’s line and the posterior cervical line
space occupying lesion

14
Q

cervical levels of retropharyngeal interspace

A

C1-C3

15
Q

cervical levels of retrolaryngeal interspace

A

C4-C5

16
Q

cervical levels of retrotracheal interspace

A

C6-7

17
Q

measurements of retropharyngeal interspace

A

not > 7mm

18
Q

measurements of retrotracheal interspace

A

not > 22mm

19
Q

how is the basilar angle drawn

A

from frontal/nasal junction to center of sella turcica

from sella to anterior aspect of foramen magnum

20
Q

normal range for basilar angle

A

123-152 degrees

21
Q

> 152 indicates what for basilar angle

A

platybasia

22
Q

how is Mcgregor’s line drawn

A

draw from superior/posterior aspect of hard palate to inferior most aspect of the occiput. measure of dens above the line

23
Q

normals of McGregor’s line males

A

not > 8 mm if it is = platybasia

24
Q

normals of McGregor’s line females

A

not > 10mm if it is = platybasia

25
Q

how is chamberlains line drawn

A

from posterior aspect of the hard palate
to post aspect of foramen mag
measure amt DENS over the line

26
Q

normal for Chamberlain’s

A

not >3 mm anything greater is platybasia

27
Q

Macrae’s line drawn

A

ant aspect of foramen mag to post aspect foramen mag

perpendicular line from dens to the line drawn

28
Q

normal for Mac rae

A

occipital bone should extend below the line if not= platybasia.
apex of DENS ant 1/4 of foramen mag if not = fracture dens

29
Q

cobb/lipman normals 0-20 degrees

A

observe for progess

30
Q

cobb/lipman normals 20-40

A

bracing

31
Q

cobb/lipman normals >40

A

sx

32
Q

Cervical Lordosis normal

A

35-45 avg=40

33
Q

thoracic kyphosis

A

angles vary by age
angles increase with age
angles increase more rapidly in females

34
Q

lumbar lordosis

A

50-60 degrees avg=55

35
Q

sacral inclination is drawn

A

line tangent to post aspect of S1
line parallel to side of film at sup/post aspect of SI
mesasure angle

36
Q

sacral inclination normals

A

30-72 degrees avg=46

37
Q

lumbosacral angle is drawn

A

parallel line to sup vert endplate S1

parallel line to top of the film to ant sup aspect SI

38
Q

normal for lumbosacral angle

A

26-57 degrees avg=41

39
Q

lumbosacral disc angle normals

A

10-15

15 facet impaction

40
Q

Ullmann’s line drawn

A

parallel to sup vert endplate S1
perpendicular to 1st line at ant aspect of S1
check to see if lumbar crossed the line

41
Q

ullmann’s line normal

A

if crosses= spondylolisthesis

42
Q

Meyerding grading 1-4

A

spondylolisthesis

43
Q

Meyerding grading >4

A

spondyloptosis

44
Q

Meyerding grading L5 behind last line

A

retrolisthesis

45
Q

fergusons weight is drawn

A

X across vert body of L3

parallel to the side of the film at midpt of X

46
Q

fergusons weight normal

A

line should cross the ant 1/3 of sacral base

47
Q

tear drop distance

A

6-11 mm avg=9

48
Q

Hip joint width normal

A

sup and axial should be about 4mm or equal to ea other

medial= teardrop should be double

49
Q

shentons line

A

smooth arc

50
Q

femoral angle noraml

A

120-130

51
Q

coxa vara

A
52
Q

coxa valga

A

> 130 degrees

53
Q

iliofemoral line

A

bilateral sym

54
Q

skinners line

A

fovea cap should be above or level with line

55
Q

kleins line

A

bi lat sym