Ankle and Lower Leg Flashcards
In order to place the ankle in a “true” AP, it should be –1–.
Rolled medially
The CR should be directed to the –1– for the lower leg.
mid-shaft
Which type of joint is the ankle joint?
Hinge
Where is the lateral malleolus located on the leg?
distal fibula
What other projection term refers to the AP projection of the foot?
Dorsoplantar
Where should the CR be directed for the AP oblique projection of the foot?
To the base of the 3rd metatarsal
Where should the CR be directed for the lateral ankle?
medial malleolus
Which projection of the ankle should be performed to best demonstrate a ligamentous tear?
AP projection with inversion
Which projection if the ankle best demonstrates the tibiofibular joint space free from superimposition?
AP oblique projection (medial rotation)
With reference to the mortise joint, how many degrees should the ankle be rotated for the best demonstration of this joint?
20 degrees from the CR
In order to adequately open the tibiotalar joint space for the ankle radiographs the foot should be placed in this position,
Dorsiflexion
All of the following are criteria for the radiograph of the lateral lower leg EXCEPT:
Malleoli without superimposition
The standard AP projection (medial rotaion) of the ankle will require –1– degrees of rotation.
45 degrees
All radiographs of the ankle performed require the __1– included on the finished radiograph.
tuberosity of the 5th metatarsal
State the 2 stress ankle positions.
- Inversion
2. Eversion
What will happen to the tibia and fibula when the lower leg is positioned in an AP with internal rotation of 45 degrees.?
Maximum interasseous space between the tibia ad fibula
shown without superimposition
What will happen to the tibia and fibula when the lower leg is positioned in an AP with external rotation of 45 degrees?
Fibula superimposed by lateral portion of tibia
they will superimpose
What femoral structures must be included on the lower leg radiographs?
femoral condyles
What ankle structures must be included on the lower leg radiograph?
Talus, medial and lateral malleolus
The mortise joint is defined as –1–.
joint space between the talus, tibia, and fibula
The AP projection ankle should have the foot in –1– degrees of dorsiflexion.
90 degrees
What 3 bones actually make up the ankle joint?
- Talus
- Tibia
- Fibula
What can you do as the student tech to even out the densities on a lower leg radiograph?
Thick part of the filter over ankle
An imaginary line going through the malleoli in a mortise view/ position ankle should be –1– to the IR.
Parallel
What is the correct SID used for an ankle exam?
40 SID
What is done to the SID for a lower leg exam?
It should be increased to 48 SID
If the CR is angled for an exam, how can we maintain the correct SID?
Lower 1 inch for every 5 degrees of CR angle
Identify the following radiographs position and projection.
Position: lateral foot
Projection: mediolateral
Identify the following radiographs position and projection.
Position: axial os calsis
Porjection: dorsoplantar
B. Position: Inversion stress of ankle
Projection: AP projection
Label.
A. Fibula B. Lateral Malleolus C. Tibia D. Medial Malleolus E. Martise joint F. Talus
What is the posterior surface of the knee called?
Popliteal
What is the method name used to achieve a lordotic chest radiograph?
Lindblom Method
How many degrees should the knee be flexed for a routine lateral lower leg position?
20-30 degrees
