Chapter 6 1503 questions & answers graded A+ 2023/2024

Chapter 6 1503 A radiograph of a PA axial projection for the intercondylar fossa (Camp Coventry method) does not demonstrate the fossa well. It is foreshortened. The following positioning factors were used: patient prone, knee flexed 40 to 45 degrees, CR angled to be perpendicular to the femur, 40-inch (100-cm) SID, and no rotation of the lower limb. Based on the factors used, what changes need to be made to produce a more diagnostic image? A. Increase SID to at least 48 inches (120 cm). B. CR must be perpendicular to lower leg. C. Rotate lower extremity 10-degree medially. D. Reduce flexion of the knee to 20 to 30 degrees - correct answer B. CR must be perpendicular to lower leg. A radiograph of an AP mortise projection of the ankle reveals that the lateral malleolus is slightly superimposed over the talus and the lateral joint space is not open. What is the most likely cause for this radiographic outcome? A. Excessive medial rotation of the foot and ankle B. Insufficient medial rotation of the foot and ankle C. Excessive plantar flexion of the foot and ankle D. Excessive dorsiflexion of the foot and ankle - correct answer B. Insufficient medial rotation of the foot and ankle How much CR angulation to the long axis of the foot is required for the plantodorsal (axial) projection of the calcaneus? A. 45 to 50 degrees B. 15 to 20 degrees C. 30 to 35 degrees D. 40 degrees - correct answer D. 40 degrees Which cuneiform articulates with the first metatarsal? A. Medial cuneiform B. Intermediate cuneiform C. Lateral cuneiform D. None of the options - correct answer A. Medial cuneiform Which term describes the top or anterior surface of the foot? A. Palmar B. Dorsum C. Volar D. Plantar - correct answer B. Dorsum How much is the ankle rotated, and in which direction, for the AP mortise projection? A. 0 degree B. 15- to 20-degree medial C. 15- to 20-degree lateral D. 15-degree lateral - correct answer B. 15- to 20-degree medial To decrease the angle between the anterior surface of the foot and anterior surface of the lower leg is described as: A. plantar flexion. B. inversion. C. dorsiflexion. D. eversion. - correct answer C. dorsiflexion Which of the following routines should be performed for a study of the second toe? A. AP, AP oblique with lateral rotation, mediolateral projection B. AP, AP oblique with medial rotation, lateromedial projection C. AP, AP oblique with lateral rotation, lateromedial projection D. AP, AP oblique with medial rotation, mediolateral projection - correct answer B. AP, AP oblique with medial rotation, lateromedial projection