Central Rays
Positioning
Anatomy
Critique
100
This is the CR for an AP axial Coccyx exam.
What is 10° caudad, midsag, 2" above symph?
100
In a true AP sacrum these are equally demonstrated and aligned withe the pelvic brim.
What are the Ischial Spines?
100
The sacrum and the ilium make up this joint.
What is the SI joint?
100
This is the way to correct a AP sacrum exam shot at 65 kVp with symph superimposed in the middle of the the sacrum.
What is increase the kVp to 75-85 and angle cephalic?
200
This is the CR for AP axial sacrum.
What is 15° cephalic, midsag, 2" above symph?
200
These are in profile in a true lateral position of the Sacrum.
What are the sacral crests?
200
This is the name for the most distal point of the coccyx.
What is Apex?
200
This is the the correction needed in an AP axial coccyx exam if the 2nd and 3rd segment of the coccyx superimposed with symph.
What is put a 10° caudad angle on the tube?
300
This is the CR for lateral Coccyx.
What is 3-4" posterior & 2" distal to to ASIS?
300
This is all the anatomy and structures that must be included on a properly positioned AP sacrum radiograph.
What are L5, the entire sacrum, symph and the SI joints?
300
This is the number of segments that make up a normal sacrum.
What is 5?
300
This is the correction needed in a laterl sacrum exam when the femoral heads are superimposed with each other.
What is you done good kid?
400
This is the CR for a lateral sacrum.
What is 3-4" posterior to ASIS?
400
These are all the pieces of anatomy and structures that must be included on an AP coccyx exam.
What are 5th sacral segment, entire coccyx, symph, and the pelvic brim?
400
The sacral side of the SI joint is called this.
What is the articular surface?
400
This is the correction needed on an AP sacrum exam if symph is on the left and sacrum is on the right.
What is rotate the patient into a true AP? (bring the right side down against the IR)
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