LRA 220 WEEK 1 QUESTIONS AND ANSWERS | LATEST UPDATE | 2024/2025 | GRADED A+

LRA 220 WEEK 1 QUESTIONS AND ANSWERS | LATEST UPDATE | 2024/2025 | GRADED A+ A correctly positioned AP 45° medial oblique ankle projection frequently may also demonstrate a fracture of the base of the fifth metatarsal if present. TRUE or FALSE TRUE A correctly positioned lateral ankle will demonstrate the lateral malleolus superimposed over the posterior half of the tibia. TRUE or FALSE TRUE A radiograph of a 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 most likely the cause for this radiographic outcome Over-rotation of foot (toward the medial direction A radiograph of an AP ankle projection reveals that the lateral joint space is not open (lateral malleolus is partially superimposed by the talus). The superior and medial joint spaces are open. What should the technologist do to correct this problem and improve the image? Nothing; this is an acceptable image A radiograph of an AP medial oblique projection of the foot, if positioned correctly, should demonstrate third through fifth metatarsals How much central ray (CR) angulation (if any) should be used for an AP projection of the toes? 10 TO 15 DEGREE TOWORD CALCANEOUS How much CR angulation to the long axis of the foot is required for the plantodorsal (axial) projection of the calcaneus? 40 DEGREE CEPHALAD How much is the foot dorsiflexed with the tangential projection for the sesamoid bones if the CR remains perpendicular to the image receptor? 15 TO 20 DEGREES FROM VERTICAL How much rotation from an AP position of the ankle will typically produce an AP mortise projection? 15-20 DEGREE The foot must be force dorsiflexed so that the long axis of the foot is perpendicular to the image receptor for AP and mortise projections of the ankle.