Foot Projection Techniques Quiz
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Questions and Answers

The central ray is perpendicular to the base of the __________ metatarsal during the projection.

third

What is the optimal angle of rotation for demonstrating the plantar surface of the foot during a medially rotated view?

  • 20 degrees
  • 45 degrees
  • 30 degrees (correct)
  • 15 degrees

    • The cuboid should appear in profile in the resulting image of the foot's oblique projection.

    True

    What should be demonstrated clearly in the PA oblique projection of the foot?

    <p>Separate first and second metatarsal bases</p> Signup and view all the answers

    Match the following projection methods with their specific characteristics:

    <p>Medial Rotation = Shows cuboid in profile Lateral Rotation = Demonstrates first and second metatarsal separation Grashey Method = Involves positioning the patient prone Oblique Projection = Angle of 30 degrees to the IR</p> Signup and view all the answers

    Which structure is well demonstrated by using a greater rotation during the foot projection?

    <p>Interspaces of the foot</p> Signup and view all the answers

    In the PA oblique projection, there should be superimposition between the medial and intermediate cuneiforms.

    <p>False</p> Signup and view all the answers

    What is the degree of medial rotation required to demonstrate the interspace between the first and second metatarsals?

    <p>30 degrees</p> Signup and view all the answers

    The resulting PA oblique projection shows the metatarsals completely superimposed.

    <p>False</p> Signup and view all the answers

    What type of image receptor is used for capturing the foot projections?

    <p>11 x 12 inch (24 x 30 cm) crosswise</p> Signup and view all the answers

    To avoid superimposition of the first metatarsal, the heel should be rotated _____ degrees laterally.

    <p>20</p> Signup and view all the answers

    What is the primary structure shown in a lateral projection of the foot?

    <p>The entire foot in profile, the ankle joint, and the distal ends of the tibia and fibula.</p> Signup and view all the answers

    Match the following projections with their characteristics:

    <p>PA Oblique = Demonstrates the first and second metatarsals free of superimposition Mediolateral = Shows the entire foot in profile AP = Evaluates congenital clubfoot Kite Method = Used to assess Talipes equinovarus</p> Signup and view all the answers

    What degree of dorsi flexion is required for the mediolateral projection of the foot?

    <p>90 degrees</p> Signup and view all the answers

    The patient's foot should be in a neutral position when taking a lateral projection.

    <p>False</p> Signup and view all the answers

    Where should the central ray be directed for both the lateral and PA oblique projections?

    <p>To the base of the third metatarsal</p> Signup and view all the answers

    What is the angle of the central ray for the AP axial oblique projection using the Isherwood method?

    <p>10 degrees cephalad</p> Signup and view all the answers

    The Isherwood method includes a medial rotation foot position to demonstrate the posterior talar articular surface.

    <p>False</p> Signup and view all the answers

    What structures are shown in the lateral rotation foot position using the Isherwood method?

    <p>Posterior talar articular surface</p> Signup and view all the answers

    The image receptor size used in the Isherwood method is _____ x _____ inch.

    <p>8 x 10</p> Signup and view all the answers

    Match the Isherwood method projections with their corresponding structures demonstrated:

    <p>Medial rotation foot = Anterior talar articular surface Medial rotation ankle = Middle subtalar articulation Lateral rotation ankle = Posterior talar articular surface AP axial oblique = Open sinus tarsi</p> Signup and view all the answers

    What is the patient position required for the lateral rotation ankle projection using the Isherwood method?

    <p>Supine or seated position</p> Signup and view all the answers

    Feistl devised the Isherwood method for subtalar joint imaging.

    <p>False</p> Signup and view all the answers

    What is the position of the foot for the anterior talar articular surface demonstration?

    <p>Medial rotation foot position</p> Signup and view all the answers

    What is the position of the central ray for the true lateral projection of the ankle joint?

    <p>Perpendicular to the medial malleolus</p> Signup and view all the answers

    The entire ankle mortise joint should overlap with the anterior tubercle of the tibia in a medial rotation.

    <p>False</p> Signup and view all the answers

    What should be visualized clearly in the evaluation criteria for the true lateral projection of the ankle?

    <p>Tibiotalar joint with medial and lateral talar domes superimposed.</p> Signup and view all the answers

    The image receptor size used for the ankle AP oblique projection is _____ inches.

    <p>8 x 10</p> Signup and view all the answers

    Match the projection with its corresponding evaluation criteria.

    <p>True Lateral = Ankle joint centered to exposure area Ankle AP Oblique = Entire ankle mortise joint demonstrated Leg AP = Ankle and knee joints without rotation Leg Lateral = Trabecular detail and soft tissue for the entire leg</p> Signup and view all the answers

    Which part should be centered to the image receptor in the leg AP projection?

    <p>Center of the leg</p> Signup and view all the answers

    The patient should be positioned prone for the leg lateral projection.

    <p>False</p> Signup and view all the answers

    What is the purpose of grasping the distal femur area while positioning for the ankle AP oblique projection?

    <p>To assist in rotating the leg and foot together.</p> Signup and view all the answers

    Which structure is NOT clearly demonstrated in the intercondylar fossa AP axial projection?

    <p>Apex of the patella superimposing the fossa</p> Signup and view all the answers

    In the lateral projection, the patient should be positioned in a prone position.

    <p>False</p> Signup and view all the answers

    What angle should the long axis of the femur make with the long axis of the tibia for the intercondylar fossa view?

    <p>60 degrees</p> Signup and view all the answers

    The central ray for the intercondylar fossa projection enters the knee joint ______ inch below the patellar apex.

    <p>1/2</p> Signup and view all the answers

    Match the projections with their primary focus:

    <p>Intercondylar Fossa AP Axial = Open fossa and knee joint space Patella PA = Patella detail through superimposing femur Lateral Projection = Mediolateral view of the knee joint Intercondylar Fossa Oblique = Soft tissue in fossa and interspaces</p> Signup and view all the answers

    Which of the following is a criterion for the patella PA projection?

    <p>Adequate penetration for visualization of patella</p> Signup and view all the answers

    Tibiofibular overlap is an indicator of correct rotation in the intercondylar fossa projection.

    <p>True</p> Signup and view all the answers

    What is the recommended image receptor size for both the intercondylar fossa and patella PA projections?

    <p>8 x 10 inch (18 x 24 cm)</p> Signup and view all the answers

    Study Notes

    Foot AP Oblique Projection

    • Rotate the patient's leg medially to form a 30-degree angle between the plantar surface of the foot and the IR.
    • Central ray: Perpendicular to the base of the third metatarsal.
    • This projection visualizes interspaces between the cuboid and calcaneus, cuboid and fourth and fifth metatarsals, cuboid and lateral cuneiform, and talus and navicular bone.
    • The cuboid is shown in profile.
    • Sinus tarsi is well demonstrated.

    Foot AP Oblique Projection - Lateral Rotation

    • Rotate the patient's leg laterally until the angle between the plantar surface of the foot and the IR is 30 degrees.
    • Central ray: Perpendicular to the base of the third metatarsal.
    • This projection visualizes interspaces between the first and second metatarsals as well as the medial and intermediate cuneiforms.

    Foot PA Oblique Projection - Grashey Method

    • Place the patient prone with the affected foot elevated on a sandbag and a folded towel under the knee, if desired.
    • Rotate the heel medially approximately 30 degrees to demonstrate interspace between the first and second metatarsals.
    • Rotate the heel laterally approximately 20 degrees to demonstrate the interspaces of the metatarsals from the second to the fifth.
    • Central ray: Perpendicular to the base of the third metatarsal.
    • Visualizes a PA oblique projection of the foot bones and interspaces of the proximal metatarsals.

    Foot Lateral Projection

    • Position the patient so their affected leg and foot are lateral.
    • Central ray: Perpendicular to the base of the third metatarsal.
    • This projection visualizes the entire foot in profile, the ankle joint, and the distal ends of the tibia and fibula.

    Foot AP Projection - Congenital Clubfoot - Kite Method

    • Place the infant supine with the hip and knee flexed so the foot rests flat on the IR.

    Lateromedial Oblique Projection - Isherwood Method

    • Place the patient semi-supine or seated, turned away from the side being examined.
    • Medial border of the foot rests on the IR with a 45-degree foam wedge under the elevated leg.
    • Central ray: Perpendicular to a point 1 inch distal and 1 inch anterior to the lateral malleolus.
    • This projection visualizes the anterior subtalar articular surface and an oblique projection of the tarsals.

    AP Axial Oblique Projection - Isherwood Method - Medial Rotation Foot

    • Seated position, body weight on the flexed hip and thigh of the unaffected side.
    • Rotate the leg and foot medially to rest the side of the foot and ankle on a 30-degree foam wedge.
    • Central ray: Directed 1 inch distal and 1 inch anterior to the lateral malleolus at a 10-degree cephalad angle.
    • This projection visualizes the middle articulation of the subtalar joint and an "end-on" projection of the sinus tarsi.

    AP Axial Oblique Projection - Isherwood Method - Lateral Rotation Foot

    • Supine or seated position.
    • Rotate the leg and foot laterally to rest the side of the foot and ankle against a foam wedge.
    • Central ray: Perpendicular to the ankle joint, entering the medial malleolus.
    • This projection visualizes a lateral projection of the lower third of the tibia and fibula, the ankle joint, and the tarsals.

    Ankle AP Oblique Projection - Mortise Joint Medial Rotation

    • Supine position.
    • Center the patient's ankle joint to the IR.
    • Internally rotate the leg and foot 15-20 degrees until the intermalleolar plane is parallel with the IR.
    • Central ray: Perpendicular, entering the ankle joint midway between the malleoli.
    • This projection visualizes the ankle mortise joint in profile, showcasing all three sides of the joint.

    Leg AP Projection

    • Supine position.
    • Adjust the patient's body so the pelvis is not rotated and the femoral condyles are parallel to the IR.
    • Central ray: Perpendicular to the center of the leg.
    • This projection visualizes the tibia, fibula, and adjacent joints.

    Leg Lateral Projection - Mediolateral

    • Supine position.
    • Central ray: Perpendicular to the center of the leg, entering slightly posterior to the lateral epicondyle of the femur.
    • This projection visualizes the tibia, fibula, and adjacent structures.

    Intercondylar Fossa AP Axial Projection - Beclere Method

    • Supine position.
    • Flex the affected knee to form a 60-degree angle between the long axis of the femur and the tibia.
    • Central ray: Perpendicular to the long axis of the tibia, entering the knee joint 1/2 inch below the patellar apex.
    • This projection визуализирует intercondylar fossa, intercondylar eminence, and knee joint.

    Patella PA Projection

    • Prone position.
    • Central ray: Perpendicular to the midpopliteal area, exiting the patella.
    • This projection provides sharper recorded detail than the AP projection due to a closer object-to-IR distance.

    Lateral Projection - Mediolateral

    • Lateral recumbent position.
    • Central ray: Perpendicular to the center of the patella, entering 1 to 1.5 inches posterior to the lateral epicondyle of the femur.
    • This projection visualizes the patella in profile, allowing for visualization of the articular surfaces, edges, and surrounding soft tissues.

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    Description

    Test your knowledge on various foot projection techniques, including the AP Oblique, lateral rotation, and Grashey method. This quiz will cover essential angles, central ray positioning, and the anatomical structures visualized in each projection. Perfect for radiography students and professionals looking to refresh their skills.

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