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boards part 4 > Lines Xray > Flashcards

Lines Xray Flashcards

1
Q

Basilar angle

A

Platybasia, basilar impression

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2
Q

McGregors line

A

> 8 males, >10 females, basilar impression

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3
Q

Chamberlain

A

Basilar impression

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4
Q

Macrae

A

Basilar impression

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5
Q

ADI

A

> 3mm adults, 5mm children, transverse lig rupture or instability due to trauma, downs, inflam arthritis

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6
Q

George’s

A

Discontinuation means anterolisthesis or retrolisthesis

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7
Q

Posterior cervical line, aka spinolaminar junction line

A

Antero/retrolisthesis

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8
Q

Stress lines cervical

A

Flx intersects c5/6

Ext intersects c4/5

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9
Q

Prevertebral soft tissue

A

Soft tissue mass:
Retropharyngeal: >7
Retrolaryngeal: >14
Retrotracheal: >22

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10
Q

Cobbs

A

Best for scoliosis

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11
Q

Risser-ferguson

A

Scoliosis, not as good as Cobb

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12
Q

Sacral inclination

A

Normal 30-72°

Average 46°

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13
Q

Lumbosacral angle

A

Normal 26-57°

Average 41°

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14
Q

Myerdings

A

Determines degree of anterolysthesis in a spondy

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15
Q

Ullman

A

L5 beyond perp line means spondy

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16
Q

Eisenstein , Sagittal canal

A

<15 mm means spinal canal stenosis

17
Q

Canal body ratio

A

The higher the ratio the smaller the canal, stenosis

18
Q

Lumbosacral disc angle

A

10-15° normal

19
Q

Lumbar gravity line

A

Ant to sacrum is hyperlordosis

Post to sacrum is hypolordosis

20
Q

Macnab

A

If one intersects the SAF of the vert below, ext malposition or facet imbrication

21
Q

Hadley s curve

A

If interrupted facet imbrication

22
Q

Kohler

A

Protrusion acetabuli

23
Q

Shenton

A

If interrupted: dislocation, neck fracture, slipped cap fem epiph

24
Q

Iliofemoral line

A

Bilateral asym: SFCE, disloc, frx, dysplasia

25
Q

Femoral angle

A

<120 coxa Vera

>130 coxa valga

26
Q

Skinner line

A

If fovea capitus falls below line, frx or coxa vara

27
Q

Klein

A

Failure of fem head to intersect is SCFE

28
Q

Patellar position

A

Patellar tendon and patella should be similar in length, or else patella alta

29
Q

Heel pad measurement

A

> 25mm male or >23 female, acromegaly

30
Q

Boehler angle

A

<28° calcaneal frx or dysplastic calcaneus

boards part 4 (15 decks)

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