LRA 225 WEEK 3 ACTUAL ASSESSMENT
QUESTIONS AND ACCURATE ANSWERS
COMPLETE REVIEW SHEET
●● What are the clinical indications for AP knee?
Answer: Fractures, lesions, degenerative joint disease
●● What is the minimum SID?
Answer: 40 inches (100 cm)
●● What IR size is used?
Answer: 10 x 12 inches
●● When is a grid required?
Answer: When part is greater than 10 cm
●● When is nongrid used?
Answer: When part is less than 10 cm
●● What is the kVp range?
Answer: 65-80 kVp
,●● What is the patient position?
Answer: Supine, no pelvic rotation, leg extended
●● How much internal rotation is required?
Answer: 3-5 degrees
●● Why is internal rotation needed?
Answer: To align interepicondylar line parallel to IR
●● What happens without internal rotation?
Answer: External rotation of knee
●● Where is CR directed?
Answer: 1/2 inch distal to apex of patella
●● What must CR be parallel to?
Answer: Tibial plateau
●● What is CR angle for average patient?
Answer: 0 degrees
, ●● What angle for thin patient?
Answer: 5 degrees caudad
●● What angle for thick patient?
Answer: 5 degrees cephalad
●● Why adjust CR angle?
Answer: To open joint space
●● What anatomy must be demonstrated?
Answer: Distal femur, proximal tibia and fibula
●● What indicates open joint space?
Answer: Femorotibial joint open
●● What does tibial plateau on end mean?
Answer: Minimal surface visible
●● What indicates no rotation?
Answer: Symmetric condyles
●● What is fibular head position on AP knee?
QUESTIONS AND ACCURATE ANSWERS
COMPLETE REVIEW SHEET
●● What are the clinical indications for AP knee?
Answer: Fractures, lesions, degenerative joint disease
●● What is the minimum SID?
Answer: 40 inches (100 cm)
●● What IR size is used?
Answer: 10 x 12 inches
●● When is a grid required?
Answer: When part is greater than 10 cm
●● When is nongrid used?
Answer: When part is less than 10 cm
●● What is the kVp range?
Answer: 65-80 kVp
,●● What is the patient position?
Answer: Supine, no pelvic rotation, leg extended
●● How much internal rotation is required?
Answer: 3-5 degrees
●● Why is internal rotation needed?
Answer: To align interepicondylar line parallel to IR
●● What happens without internal rotation?
Answer: External rotation of knee
●● Where is CR directed?
Answer: 1/2 inch distal to apex of patella
●● What must CR be parallel to?
Answer: Tibial plateau
●● What is CR angle for average patient?
Answer: 0 degrees
, ●● What angle for thin patient?
Answer: 5 degrees caudad
●● What angle for thick patient?
Answer: 5 degrees cephalad
●● Why adjust CR angle?
Answer: To open joint space
●● What anatomy must be demonstrated?
Answer: Distal femur, proximal tibia and fibula
●● What indicates open joint space?
Answer: Femorotibial joint open
●● What does tibial plateau on end mean?
Answer: Minimal surface visible
●● What indicates no rotation?
Answer: Symmetric condyles
●● What is fibular head position on AP knee?
