Lower Extremities
8 Foot
Anatomy
Digits, Head, Base, Body or shaft of phalanx, or metatarsal.
Proximal Phalanges, Middle Phalanges, Distal Phalanges, Metatarsals, Tarsals, Calcaneous (os calcis), Talus, Cuboid, Navicular, 1st cuneiform, 2nd cuneiform, 3rd cuneiform, Proximal Interphalangeal joints, Distal Interphalangeal joints, Metatarsophalangeal joints, Tarsometatarsal joints
Projections
[Part], PA or AP
CR Location
[Part], PA or AP –
Evaluation Criteria
[Part], PA or AP –
.
Hows & Whys of Foot Radiography
- Why are toes obliqued to the side that allows the toe to be closest to the image?
- To prevent magnification. Image contact also reduces patient motion.
- How do you know that a AP toe was not rotated?
- The concavity of the shafts of the phalanges is equal.
- How can you tell that the lateral toe was parallel to the image?
- The joint spaces are open.
- How can you tell the tube was angled 15º on the AP toes?
- The interphalangeal joint spaces are open.
- How can you tell that a AP foot is not rotated?
- Equal concavity of the shafts of the phalanxes and metatarsals.
- Why should the toes be kept parallel to the image?
- To prevent foreshortening of the phalanges and to open the joint spaces.
- What type of joints are the interphalangeal joints?
- Diarthrotic, hinge type joint
- What type of joints are the metatarsophalangeal joints?
- Diarthrotic, hinge type joint
- What type of joints are the tarsometatarsal joints?
- Diarthrotic, gliding types.
- What distinguishing feature is unique to the first digit?
- The first di has only 2 phalanges.