CAMRT Anatomy and Positioning Principles Questions and Answers 2 — Questions and Answers
Question 1: Which joint type is found at the knee and allows flexion and extension movements?
- Ball-and-socket joint
- Hinge joint (Correct answer)
- Pivot joint
- Gliding joint
Correct answer: Hinge joint
The knee is primarily a hinge joint (ginglymus), allowing flexion and extension in one primary plane of motion.
Question 2: The olecranon process is a landmark on which bone?
- Radius
- Humerus
- Ulna (Correct answer)
- Scapula
Correct answer: Ulna
The olecranon process is the bony prominence at the proximal end of the ulna, forming the point of the elbow.
Question 3: For an AP projection of the knee, how much is the central ray typically angled cephalad for a patient with average muscle development?
- 0 degrees (perpendicular)
- 3–5 degrees cephalad (Correct answer)
- 10–15 degrees cephalad
- 20 degrees cephalad
Correct answer: 3–5 degrees cephalad
A 3–5 degree cephalad angle is used for the AP knee to account for the normal divergence of the x-ray beam and open the joint space.
Question 4: Which positioning landmark is palpated to locate C7 for cervical spine radiography?
- Mastoid tip
- Gonion
- Vertebra prominens (Correct answer)
- Acromion
Correct answer: Vertebra prominens
The vertebra prominens (C7) has the most prominent spinous process in the cervical region and is easily palpated at the base of the neck.
Question 5: In a lateral hip radiograph using the Lauenstein method, the affected leg is placed in which position?
- Extended and internally rotated
- Flexed and abducted (frog-leg) (Correct answer)
- Extended and externally rotated
- Crossed over the unaffected leg
Correct answer: Flexed and abducted (frog-leg)
The Lauenstein (frog-leg lateral) method places the hip in flexion and abduction with the knee bent to demonstrate the femoral neck in a lateral projection.
Question 6: Which image receptor size is most commonly used for a standard PA chest radiograph on an adult patient?
- 24 × 30 cm
- 30 × 35 cm
- 35 × 43 cm (Correct answer)
- 18 × 24 cm
Correct answer: 35 × 43 cm
A 35 × 43 cm (14 × 17 inch) IR is the standard size for PA chest radiography in adults to include the full lung fields.
CAMRT Anatomy and Positioning Principles Questions and Answers 2
Which joint type is found at the knee and allows flexion and extension movements?