RAD 1125 FOOT, ANKLE, CALCANEUS IMAGE EVALUATION Flashcards
What is the tube angulation for FOOT AP AXIAL?
10 degrees posteriorly towards the heel
What should be visualized in FOOT AP AXIAL?
Entire foot should be seen from distal phalanges to the distal talus and calcaneus
PROPER CENTERING AND COLLIMATION?
Both top to bottom and side to side
CR
3RD METATARSAL
ALIGNMENT OF FOOT AP AXIAL
FOOR DOWN ON LONG AXIS OF IR
How do you no there was no rotation of the foot in AP AXIAL X RAY?
- Equal spacing between the shafts of the 2nd through 4th metatarsals
- OVERLAP of the 2nd through fifth bases of the metatarsals
- Tube angles result in an improved demonstration of open joint spaces of phalanges (interphalnges), metatarsals and phalanges (metatarsophalngeal), tarsals and metatarsals (tarsometatarsal) JOINTS
What are proper rotation be seen with oblique foot?
- 3rd to the 5th metatarsal bases are free from superimposition
- Bases of the 1st and second metatarsals are superimposed on the intermediate and medial cuneiforms.
- If over-rotated, lateral cuneiform tends to be thrown over the other cuneiforms
- Tuberosity of the 5th metatarsal, sinus tarsi and intertarsal joints
Which metatarsal bases in the oblique foot are free from superimposition?
3rd to the 5th metatarsal bases are free from superimposition
What two metatarsal bases appear overlapped or superimposed on the intermediate and medial cuneiform in the image of the foot oblique projection?
Bases of the 1st and 2nd metatarsals are superimposed on the cuneiforms
What happens if there is over rotation?
The lateral cuneiform tends to be thrown over the other cuneiforms
Tuberosity is demonstrated at which metatasal?
5th metatarsal
What should be seen on the lateral foot?’
- ENTIRE FOOT AND DISTAL LEG
- Superimposed plantar surface of the metatarsal heads, meaning the metatarsal’s nearly superimposed
3.Fibula overlapping the posterior portion of the tibia - Tibiotalar joint be seen
What should be visualized in the Lateral foot?
The Entire foot to the distal leg
What are superimposed/nearly superimposed?
The superimposed plantar surface of the metatarsal heads or metatarsal heads are nearly superimposed.
What overlaps?
The Fibula overlaps the posterior portion of the tibia
What joint is seen?
The tibiotalar joint is seen
For the plantodorsal Calcaneus, what demonstrates no rotation?
The 1st and 5th metatarsal are not projected on either sides of foot
Which tarsal bone comprises the heel of the foot?
A) Talus
B) Calcaneus
C) Navicular
D) Cuboid
CALCANEUS
-Elongation of calcaneus can happen due to what?
Due to improper tube angulation
What can be seen AP ANKLE image evaluation?
- Ankle joint is centered to exposure area of the IR
- Medial and Lateral Malleoli
- Talus
If no rotation in AP ankle?
Overlap of the ankle is evidenced by?
1. Overlap of the tibiofibular joint with anterior tubercle slightly superimposed over the fibula
2. Talus slightly overlapping distal fibula
3. Tibiotalar joint spaces seen
In the Oblique Ankle: Mortise, what can be seen?
- Entire ankle mortise joint
- Distal Tibia, Fibula, Talus
In the Oblique Ankle: Mortise, what can be properly rotated?
The proper rotation of 15 to 20 degrees of the ankle is indicated by?
-Open Talofibular articulation
-Open Tibiotalar articulation
-No overlap of the anterior tubercle of the tibia and the talus with the fibula
What can be seen in the lateral ankle?
Distal tibia and fibula, talus calcaneus and adjacent tarsals
