Radiographic Positioning and Related
Anatomy
Comprehensive Educator Guide & Integrated Evaluation Matrix (100 Questions & Answers)
Part 1: Upper and Lower Extremities (Questions 1 - 20)
Question 1: Which projection of the wrist best demonstrates the scaphoid bone free of
superimposition?
Correct Answer: PA projection with ulnar deviation.
Clinical Rationale: Ulnar deviation opens up the joint spaces on the lateral side of the wrist and elongates the
scaphoid, clearing bone foreshortening.
Question 2: For a true lateral projection of the elbow, how many degrees should the joint be flexed?
Correct Answer: 90 degrees.
Clinical Rationale: 90-degree flexion keeps the olecranon process in profile and places the epicondyles
perpendicular to the image receptor.
Question 3: What specialized projection is used to demonstrate the carpal tunnel canal?
Correct Answer: Gaynor-Hart method (Tangential projection).
Clinical Rationale: This method uses a 20-30 degree angle to the long axis of the hand to profile the palmar
aspect of the wrist canal.
Question 4: Where should the central ray enter for an AP projection of the thumb?
Correct Answer: First metacarpophalangeal (MCP) joint.
Clinical Rationale: Centering at the first MCP joint ensures the entire length of the first digit and its
capitate/trapezium articulations are visualized.
Question 5: Which oblique position of the shoulder demonstrates the glenoid cavity in profile?
Correct Answer: Grashey method (AP oblique position).
Clinical Rationale: Rotating the patient 35 to 45 degrees toward the affected side places the glenoid cavity
scapulohumeral joint space parallel to the CR.
Question 6: For an axial projection of the clavicle, what is the standard central ray angulation?
Correct Answer: 15 to 30 degrees cephalad.
Clinical Rationale: The cephalic angle projects the clavicle superiorly above the scapula and first ribs, reducing
structural overlap.
, Question 7: To demonstrate the acromioclavicular (AC) joints for structural separation, how should the
exam be conducted?
Correct Answer: Erect position, with and without weights.
Clinical Rationale: The erect position coupled with equal bilateral weights pulls down the arms to stress and
measure AC joint widening or subluxation.
Question 8: Which routine projection of the foot requires the central ray to be angled 10 degrees
posteriorly?
Correct Answer: AP axial projection.
Clinical Rationale: A 10-degree cephalad/posterior angle aligns the central ray perpendicular to the sloping
structural plane of the tarsals and metatarsals.
Question 9: To accurately profile the ankle mortise joint space, how many degrees must the leg be
rotated?
Correct Answer: 15 to 20 degrees medially.
Clinical Rationale: An intermalleolar line parallel to the IR requires a 15-20 degree internal rotation to completely
clear the talofibular joint space.
Question 10: What projection of the knee best evaluates the intercondylar fossa free of patellar
superimposition?
Correct Answer: Holmblad or Camp-Coventry method (PA axial tunnel views).
Clinical Rationale: Axial tunnel views project the patella superiorly and open up the deep notch between the
femoral condyles.
Question 11: For a lateral projection of the calcaneus, where should the central ray be directed?
Correct Answer: 1 inch distal to the medial malleolus.
Clinical Rationale: This centering point positions the central ray directly over the center of the large calcaneus
body and subtalar joint.
Question 12: Which projection of the knee demonstrates the proximal fibular neck free of tibial
superimposition?
Correct Answer: AP oblique with medial (internal) rotation.
Clinical Rationale: Internal rotation moves the fibular head and neck out from behind the heavy lateral condyle of
the tibia.
Question 13: Where does the central ray exit for the Prone tangential projection (Settegast method) of
the patella?
Correct Answer: The patellofemoral joint space.
Clinical Rationale: The Settegast method uses acute knee flexion to profile the vertical joint space and assess
vertical subluxations.
Question 14: For an AP projection of the pelvis, how should the patient's lower extremities be adjusted?
Correct Answer: Rotated 15 to 20 degrees medially.
Clinical Rationale: Internal rotation places the femoral necks parallel to the IR, elongating them and hiding the
lesser trochanters from view.
Anatomy
Comprehensive Educator Guide & Integrated Evaluation Matrix (100 Questions & Answers)
Part 1: Upper and Lower Extremities (Questions 1 - 20)
Question 1: Which projection of the wrist best demonstrates the scaphoid bone free of
superimposition?
Correct Answer: PA projection with ulnar deviation.
Clinical Rationale: Ulnar deviation opens up the joint spaces on the lateral side of the wrist and elongates the
scaphoid, clearing bone foreshortening.
Question 2: For a true lateral projection of the elbow, how many degrees should the joint be flexed?
Correct Answer: 90 degrees.
Clinical Rationale: 90-degree flexion keeps the olecranon process in profile and places the epicondyles
perpendicular to the image receptor.
Question 3: What specialized projection is used to demonstrate the carpal tunnel canal?
Correct Answer: Gaynor-Hart method (Tangential projection).
Clinical Rationale: This method uses a 20-30 degree angle to the long axis of the hand to profile the palmar
aspect of the wrist canal.
Question 4: Where should the central ray enter for an AP projection of the thumb?
Correct Answer: First metacarpophalangeal (MCP) joint.
Clinical Rationale: Centering at the first MCP joint ensures the entire length of the first digit and its
capitate/trapezium articulations are visualized.
Question 5: Which oblique position of the shoulder demonstrates the glenoid cavity in profile?
Correct Answer: Grashey method (AP oblique position).
Clinical Rationale: Rotating the patient 35 to 45 degrees toward the affected side places the glenoid cavity
scapulohumeral joint space parallel to the CR.
Question 6: For an axial projection of the clavicle, what is the standard central ray angulation?
Correct Answer: 15 to 30 degrees cephalad.
Clinical Rationale: The cephalic angle projects the clavicle superiorly above the scapula and first ribs, reducing
structural overlap.
, Question 7: To demonstrate the acromioclavicular (AC) joints for structural separation, how should the
exam be conducted?
Correct Answer: Erect position, with and without weights.
Clinical Rationale: The erect position coupled with equal bilateral weights pulls down the arms to stress and
measure AC joint widening or subluxation.
Question 8: Which routine projection of the foot requires the central ray to be angled 10 degrees
posteriorly?
Correct Answer: AP axial projection.
Clinical Rationale: A 10-degree cephalad/posterior angle aligns the central ray perpendicular to the sloping
structural plane of the tarsals and metatarsals.
Question 9: To accurately profile the ankle mortise joint space, how many degrees must the leg be
rotated?
Correct Answer: 15 to 20 degrees medially.
Clinical Rationale: An intermalleolar line parallel to the IR requires a 15-20 degree internal rotation to completely
clear the talofibular joint space.
Question 10: What projection of the knee best evaluates the intercondylar fossa free of patellar
superimposition?
Correct Answer: Holmblad or Camp-Coventry method (PA axial tunnel views).
Clinical Rationale: Axial tunnel views project the patella superiorly and open up the deep notch between the
femoral condyles.
Question 11: For a lateral projection of the calcaneus, where should the central ray be directed?
Correct Answer: 1 inch distal to the medial malleolus.
Clinical Rationale: This centering point positions the central ray directly over the center of the large calcaneus
body and subtalar joint.
Question 12: Which projection of the knee demonstrates the proximal fibular neck free of tibial
superimposition?
Correct Answer: AP oblique with medial (internal) rotation.
Clinical Rationale: Internal rotation moves the fibular head and neck out from behind the heavy lateral condyle of
the tibia.
Question 13: Where does the central ray exit for the Prone tangential projection (Settegast method) of
the patella?
Correct Answer: The patellofemoral joint space.
Clinical Rationale: The Settegast method uses acute knee flexion to profile the vertical joint space and assess
vertical subluxations.
Question 14: For an AP projection of the pelvis, how should the patient's lower extremities be adjusted?
Correct Answer: Rotated 15 to 20 degrees medially.
Clinical Rationale: Internal rotation places the femoral necks parallel to the IR, elongating them and hiding the
lesser trochanters from view.
