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Clinical Pod Med Exam 3 > Radiographic Angles > Flashcards

Radiographic Angles Flashcards

1
Q

Name the angular relationships found in the dorso-plantar projection.

A
  1. talocalcaneal angle (angle of Kite)
  2. cuboid abduction angle
  3. metatarsus adductus angle
  4. intermetatarsal angle
  5. tibial sesamoid position
  6. hallux abductus angle
  7. hallux interphalangeal angle
  8. proximal articular set angle (PASA)
  9. distal articular set angle (DASA)
  10. metatarsal protrusion distance
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2
Q

Name the angular relationships found on the lateral projection.

A
  1. calcaneal inclination angle
  2. talar declination angle
  3. cyma line
  4. Fowler-Phillip angle
  5. Bohler’s angle
  6. Talometatarsal angle (Meary’s angle)
  7. critical angle of Gissane
  8. 1st MPJ structure
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3
Q

what is the Talocalcaneal angle (angle of Kite)?

A

measure of the transverse plane angular relationship of the longitudinal bisectors fo the talus and calcaneus

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4
Q

what is the normal talocalcaneal angle (angle of kite)?

A

ages 0-5: (35-50 deg)

ages 5-adult: (15-35 deg)

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5
Q

how does talocalcaneal angle change in STJ pronation/ supination?

A
  • increases in STJ pronation

- decreases in STJ supination

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6
Q

what is the talocalcaneal angle used to measure?

A

evaluate flatfoot deformity

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7
Q

what is the cuboid abduction angle?

A

a measure of the most lateral surface of the cuboid and calcaneus

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8
Q

what is the normal cuboid abduction angle?

A

0-5 deg

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9
Q

how does cuboid abduction angle change with pronation?

A

results in increased abduction

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10
Q

what is the metatarsus adductus angle?

A

bisection of lesser tarsus and bisection of 2nd met (or intermediate cuneiform)
*gives the relative position of the forefoot to the rearfoot

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11
Q

what is the normal metatarsus adductus angle?

A

0-15 deg

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12
Q

what is the metatarsus primus adductus angle?

A

represents a deviation of the 1st met relative to the 2nd

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13
Q

what is the normal metatarsus primus adductus angle?

A

8-12 deg

*w/ adductus, the normal decreases to 8-10 deg

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14
Q

what is the 1st intermetatarsal angle used to evaluate?

A

hallux abducto valgus deformity

-will determine the type of procedure you choose to do

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15
Q

what is the tibial sesamoid position?

A

change in sesamoid position that occurs relative to teh 1st met head
*there are 7 positions(gradually drifts laterally)

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16
Q

what are the normal tibial sesamoid position?

A

positions 1-3

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17
Q

what is the hallux abductus angle?

A

bisection of proximal phalanx and bisection of 1st met

*quantifies the lateral deviation of the hallux in HAV

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18
Q

what is the normal hallux abductus angle?

A

10-15 deg

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19
Q

what is the hallux interphalangeal angle?

A

bisection of distal phalanx and bisection of proximal phalanx
*represents the lateral hallux deviation at level of IPJ

20
Q

what is the normal hallux Interphalangeal angle?

A

0-10 deg

21
Q

what is PASA (proximal articular set angle)?

A

-bisection of 1st met, draw line that guesstimates effective articular surface at the head of 1st met, and a line perpendicular to the 1st met bisection

22
Q

what is normal PASA?

A

7.5 deg

23
Q

what is DASA (distal articular set angle)?

A

bisect proximal phalanx. draw line perpendicular to it. Drw a line guesstimating distar articular surface

24
Q

what is normal DASA?

A

7.5 deg

25
Q

what is metatarsal protrusion distance?

A

measurement difference in length btwn the 1st and 2nd mets

26
Q

what is the normal metatarsal protrusion distance?

A

+/- 2mm

27
Q

what is the calcaneal inclination angle?

A

angle representing inferior surface of calcaneus and weight supporting surface

28
Q

what is normal calcaneal inclination angle?

A

18-21 deg

29
Q

how does calcaneal inclination angle change with different foot types?

A
  • decreased w/ pes planus

- increased w/ pes cavus

30
Q

what is the normal talar declination angle?

A

21 deg

31
Q

what is the cyma line formed by?

A

talonavicular joint + calcaneocuboid joint

32
Q

anterior displacement of cyma line indicates what?

A

pronation

33
Q

posterior displacement of cyma line indicates what?

A

supination

34
Q

what is the fowler-phillip angle?

A

angle formed by the lines of the inferior surface of calcaneus and the posterosupero tuberosity of calcaneus

35
Q

what is the normal fowler-phillip angle?

A

44-69 deg

36
Q

what is the fowler-phillip angle used to evaluate for?

A

haglund’s deformity

37
Q

what is bohler’s angle?

A
  • one line is formed by postero-superior surface of calcaneus
  • the other is formed by anterior process
38
Q

what is the normal bohler’s angle?

A

25-40 deg

39
Q

how does bohler’s angle change with a calcaneal fracture?

A

decreases

40
Q

what is the talometatarsal angle (Meary’s angle)?

A

angle formed by teh bisection of the talus and 1st met

41
Q

what is the normal talometatarsal angle?

A

0-10 deg

42
Q

what is the critical angle of Gissane?

A
  • draw a line thru posterior and middle facet of calcaneus

* draw another line thru the middle and anterior facet of calcaneus

43
Q

what is the normal critical angle of Gissane?

A

120-145 deg

44
Q

how does critical angle of Gissane chaange with fracture?

A

increases

45
Q

what is a deviated joint?

A

when lines cross OUTSIDE the joint

46
Q

what is a subluxed joint?

A

when lines cross INSIDE the joint

47
Q

what is a dislocated joint?

A

no relationships between the lines

Clinical Pod Med Exam 3 (7 decks)

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