AC (Acromioclavicular) Joints

(T/F) Bilateral AP projections of the acromioclavicular (AC) joints should be exposed at the end of full inspiration.

False

(T/F) Gonadal shielding does not need to be used for radiographs of the acromioclavicular (AC) joints.

False

(T/F) The acromioclavicular (AC) joints are located at the same horizontal level as the jugular notch.

False

(T/F) When performing a bilateral AP projection of the acromioclavicular (AC) joints, the AP projection with weights is taken first.

False

The acromioclavicular (AC) joints are diarthrodial, synovial, spheroidal type joints.

False

The AP axial projection (Alexander Method) of the acromioclavicular joints requires the central ray to be angled -- degrees (caudad or cephalad) ------.

15 cephalad

Bilateral AP projections of the acromioclavicular joints are taken at a

72 inch (183 cm) SID

Which of following positioning maneuvers are performed when obtaining routine bilateral AP projections of the acromioclavicular joints on an ambulatory patient?

Place the shoulders on the same horizontal plane. For the projection with the weights, attach the weights to the patient's wrists. Align the midsagittal plane to the IR Instruct the patient to look straight ahead. Direct the central ray perpendicular to the image receptor. Take the AP projection without weights first. Place the patient in an erect position with the patient facing the x-ray tube. Use a 72 inch SID. Instruct the patient to stand with his/her weight equally distributed on both feet. Direct the central ray to about 1 inch above the jugular notch.

(T/F) A 72 inch SID is used for AP projections of the acromioclavicular (AC) joints to minimize magnification and increase the probability of including both joints on the same image receptor.

True

(T/F) AP projections of the acromioclavicular (AC) joints should be obtained in an upright position because a dislocation of the AC joint tends to reduce itself in the recumbent position.

True

(T/F) Both right and left anatomical markers should be placed on the image receptor when performing bilateral AP projections of the acromioclavicular joints.

True

(T/F) When obtaining the AP projection of the acromioclavicular (AC) joints with weights, the same amount of weight must be used on the injured and uninjured sides.

True

You have a requistion for radiographs of the right clavicle and bilateral acromioclavicular (AC) joints on a 23 year old male who was injured playing football. The radiographs of the AC joints should be taken (after or before) ----- the radiographs of the clavicle?

after

The acromioclavicluar (AC) joint is formed by the (lateral or medial) ---- end of the clavicle and the ---- of the scapula

lateral acromion

In order to include both the right and left acromioclavicular (AC) joints on the AP bilateral projection the ------- plane is centered to the image receptor.

midsagittal