Chapter 6: Toes/Foot/Ankle Flashcards
What anatomy is demonstrated on the AP axial projection of the toes?
(1) Phalanges
(2) Tarsals
(3) Open IP and MTP joint spaces
1 and 3
How can the positioning setup procedure be adjusted for an AP axial foot projection to demonstrate uniform image density throughout the toes and foot areas?
Place a compensating filter over the toes.
What type of CR angle is required for the AP axial projection of the foot?
10 degrees posteriorly (towards heel)
An optimal AP axial foot (non weight bearing) projection demonstrates all the following except
a. an open medial-intermediate cuneiform joint space.
b. uniform density across all metatarsals
c. the calcaneus without talar superimposition.
d. open TMT joint spaces.
C
With which projection are the cuboid and its articulations best demonstrated?
AP oblique foot in medial rotation position
On a lateral foot image with accurate positioning, the ___ and ___ are seen in profile
tuberosity; base of 5th MT
For a 15- to 20-degree internally rotated AP oblique ankle projection, the
leg is internally rotated until the ___ is ___ with the IR
intermalleolar line; parallel
A 15- to 20-degree internally rotated AP oblique ankle projection with accurate positioning demonstrates which of the following joints as open spaces?
- Tibiotalar
- Lateral mortise
-Medial mortise
-all of the above
All of the above
When positioning a non weight bearing lateral ankle projection, the
1. medial and lateral malleoli are positioned directly on top of each other.
2. lateral foot surface is aligned parallel with the IR.
3. lower leg is parallel with the imaging table (IR)
4. central ray is centered to the medial malleolus.
2, 3 and 4
A non weight bearing lateral ankle projection with accurate positioning demonstrates
1. an open tibiotalar joint.
2. domes aligned
3. 1 inch (2.5 cm) of the fifth metatarsal base.
4. posterior half of the tibia superimposes fibula
1, 2, 3 and 4
Which of the following is true with respect to axial calcaneal projections?
1. The image demonstrates an open talocalcaneal joint space.
2. The foot is flexed 90 degrees to the lower leg and rotated slightly laterally.
3. A 40-degree central ray is directed proximally.
4. The central ray is centered to the head of the fifth metatarsal.
1 and 3
An axial calcaneus projection with the patient’s foot in correct dorsal flexion and the central ray angled 40 degrees proximally demonstrates
1. an elongated calcaneal tuberosity.
2. a foreshortened calcaneal tuberosity.
3. an open talocalcaneal joint space.
4. sustentaculum tali in profile
3 and 4
An AP axial foot projection obtained with the foot laterally rotated demonstrates
1. an increase in metatarsal base superimposition
2. the calcaneus with decreased talar superimposition
3. the calcaneus with increased talar superimposition.
4. a decrease in metatarsal base superimposition.
1 and 3
An AP ankle image obtained with the patient’s leg in lateral rotation will demonstrate which of the following?
1.A closed medial mortise
2.tibia superimposing more than half of the fibula
3.An open medial mortise
4. tibia superimposing all of the fibula
1 and 2
A lateral foot image obtained in a patient whose leg was rotated externally (heel off IR) demonstrates:
anterior fibula is demonstrated posterior to mid tibia
A lateral ankle image in which the leg is internally rotated will demonstrate medial malar dome ___ to lateral talar dome
posterior
Which of the following positioning setup procedures must be completed to obtain open joint spaces on an AP Axial foot image?
-The patient’s foot is positioned flat against the IR.
-Long axis of foot aligned with long axis of IR.
-The central ray is angled 10 degrees posteriorly
-All of the above
All of the above
Which of the following pertains to a lateral non weight bearing ankle image that demonstrates the lateral talar dome distal to the medial talar dome?
- The patient was imaged with the distal lower leg elevated.
- The patient was imaged with the proximal lower leg elevated.
The patient was imaged with the distal lower leg elevated.
T/F: For the lateral foot, the plantar surface does not have to be perpendicular to the IR.
False
T/F: When the foot is rotated correctly for an AP oblique foot projection all of the metatarsals are superimposed .
False
Which tarsal bone articulates with the superior aspect of the calcaneus?
Talus
Which of the tarsal bones is most lateral?
Cuboid
The lateral cuneiform articulates with which of the following bones of the foot? 1. 3rd metatarsal
2. Cuboid
3. Navicular
1, 2, and 3
The cuboid articulates with the ___ and ___ metatarsal
calcaneus; fifth
The foot consists of ________ bones.
26
The heads of the metatarsals articulate with:
The phalanges
The medial malleolus is located at the:
distal aspect of the tibia
The process on the distal aspect of the fibula is termed the:
Lateral malleolus
The small foramen located between the talus and calcaneus is the:
Sinus tarsi
posterior surface of the foot is termed:
Dorsal
The talus articulates with the:
1. Calcaneus
2. Fibula
3. Tibia
1, 2 and 3
