Radiographic Angles Flashcards
Name the angular relationships found in the dorso-plantar projection.
- talocalcaneal angle (angle of Kite)
- cuboid abduction angle
- metatarsus adductus angle
- intermetatarsal angle
- tibial sesamoid position
- hallux abductus angle
- hallux interphalangeal angle
- proximal articular set angle (PASA)
- distal articular set angle (DASA)
- metatarsal protrusion distance
Name the angular relationships found on the lateral projection.
- calcaneal inclination angle
- talar declination angle
- cyma line
- Fowler-Phillip angle
- Bohler’s angle
- Talometatarsal angle (Meary’s angle)
- critical angle of Gissane
- 1st MPJ structure
what is the Talocalcaneal angle (angle of Kite)?
measure of the transverse plane angular relationship of the longitudinal bisectors fo the talus and calcaneus
what is the normal talocalcaneal angle (angle of kite)?
ages 0-5: (35-50 deg)
ages 5-adult: (15-35 deg)
how does talocalcaneal angle change in STJ pronation/ supination?
- increases in STJ pronation
- decreases in STJ supination
what is the talocalcaneal angle used to measure?
evaluate flatfoot deformity
what is the cuboid abduction angle?
a measure of the most lateral surface of the cuboid and calcaneus
what is the normal cuboid abduction angle?
0-5 deg
how does cuboid abduction angle change with pronation?
results in increased abduction
what is the metatarsus adductus angle?
bisection of lesser tarsus and bisection of 2nd met (or intermediate cuneiform)
*gives the relative position of the forefoot to the rearfoot
what is the normal metatarsus adductus angle?
0-15 deg
what is the metatarsus primus adductus angle?
represents a deviation of the 1st met relative to the 2nd
what is the normal metatarsus primus adductus angle?
8-12 deg
*w/ adductus, the normal decreases to 8-10 deg
what is the 1st intermetatarsal angle used to evaluate?
hallux abducto valgus deformity
-will determine the type of procedure you choose to do
what is the tibial sesamoid position?
change in sesamoid position that occurs relative to teh 1st met head
*there are 7 positions(gradually drifts laterally)
what are the normal tibial sesamoid position?
positions 1-3
what is the hallux abductus angle?
bisection of proximal phalanx and bisection of 1st met
*quantifies the lateral deviation of the hallux in HAV
what is the normal hallux abductus angle?
10-15 deg
what is the hallux interphalangeal angle?
bisection of distal phalanx and bisection of proximal phalanx
*represents the lateral hallux deviation at level of IPJ
what is the normal hallux Interphalangeal angle?
0-10 deg
what is PASA (proximal articular set angle)?
-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
what is normal PASA?
7.5 deg
what is DASA (distal articular set angle)?
bisect proximal phalanx. draw line perpendicular to it. Drw a line guesstimating distar articular surface
what is normal DASA?
7.5 deg
