RAD 111 unit 5 shoulder girdle

what is the purpose of performing the lawrence method with exaggerated external rotation?

• detecting hill-sachs

• detecting bankart

scapula relationship to IR for grashey

parallel

coracoid and acromion line relationship to IR for grashey

perpendicular

midcoronal relationship to IR for AC joints

parallel

line from superior angle of scapula to humeral head for Y scapula

perpendicular

scapula body relationship to IR for neer

perpendicular

condylar line for lateral humerus

perpendicular

coracoid and acromion line relationship to IR for Y shoulder

parallel

condyle relationship to IR for external rotation shoulder

parallel

where is the proper centering for a left transthoracic humerus?

exits at the level of mid-shaft of left humerus

where is the centering for a grashey?

2” below humeral head and 2” medial

what is the correct obliquity for lateral scapula?

45-60

what SID is used for unilateral AC joints?

40

what is the proper arm position for detecting a bankart lesion with the lawrence method?

exaggerated external rotation to have condyles at 45 degrees to floor

what is a likely radiographic sign for “impingement syndrome” of the shoulder during an outlet view?

bone spurring in acromiohumeral space

where is the centering point for an AP scapula?

2” below coracoid

for a hypersthenic football player, how many images would be required for AC joints?

4

what is the correct obliquity for PA oblique shoulder view?

45-60

how many images should be taken for a complete right clavicle series?

2

what is the correct angle for an AP axial clavicle on a hypersthenic patient?

15

what projection should not be performed for a possible shoulder dislocation?

inferosuperior axial

what is the weight of sandbags for AC joints?

8-10 pounds

what view best demonstrates the supraspinatus muscle location?

outlet

to image hill-sachs, what is the proper arm movement with the lawrence method?

exaggerated external rotation to have condyles 45 degrees to the floor

what projections use orthostatic breathing?

• transthoracic shoulder

• AP scapula

• transthoracic humerus

what projections use end of inspiration breathing?

• AP clavicle

• AP axial clavicle

for the SOV exam, how is the arm positioned?

slightly abducted

what is the initial collimation for a transthoracic shoulder?

10×12 lengthwise

what is the average patient angle for an AP axial clavicle?

20

which view best demonstrates the coracoracromial arch?

neer

as the angle increases for the neer, what happens to the arch?

elongates for better visualization

what angulation is used for the neer method?

10-15 degrees caudal

what size sponge should be used for the lawrence method?

3”

what scapular border separates from the ribs during a proper AP scapula?

lateral

what SID is used for bilateral AC joints?

72

where is the CR location for the neer method?

2” below the top of shoulder/humeral head

where is the CR location for a PA oblique shoulder?

2” below top of shoulder

what is the use of the boomerang filter for AP projections of the shoulder/scapula?

to help compensate for various tissue thicknesses to have a uniform density

what view best demonstrates the subacromial space?

SOV/neer/outlet

a radiograph of an AP oblique projection for the glenoid cavity reveals the anterior/posterior rims of the glenoid process are not superimposed. what modification will produce a more acceptable image?

increase rotation of body toward the IR

how is the arm positioned for a grashey?

neutral

what is the range of pivot for a lawrence view?

25-30

4 different ways to describe CR entrance for neer and PA oblique shoulder

• 2” below acromioclavicular joint

• passes through GH joint

• 2” below top of shoulder

• enter/passes through proximal humerus

where does the CR exit for a transthoracic shoulder?

surgical neck of humerus

where is the CR centered for an inferior superior shoulder?

through the GH joint

a radiograph of a PA oblique (scapular Y) reveals the scapula is slightly rotated. the axillary border of the scapula is determined to be more lateral with the vertebral border. what modification will be made for the repeat exposure?

increase rotation of thorax toward the IR

what is the patient obliquity for the outlet view?

45-60

a referring physician suspects that a subacromial spur may be causing a patient’s impingement syndrome. what position would be best for viewing possible spurs in the supraspinatus outlet?

neer method with 10-15 degrees caudal angle

what is the optimal arm placement for the AP scapula?

affected arm abducted past 90 degrees and with arm resting on top of head

how can you tell if the proper angulation was used for inferiosuperior shoulder?

all borders of the glenoid cavity should be superimposed

bankart lesion

• scapula

• anterior injury of labrum

• demonstrated on grashey

hill-sachs lesion

• posterolateral side of humeral head

• damage to cartilage and bone

where is the CR centered for an AP clavicle?

midclavicle

if the patient cannot abduct their arm 90 degrees for the inferiosuperior, how should the tube be modified?

less pivot angle

how is the arm positioned for routine lawrence view?

• abducted 90 degrees

• supinated

• externally rotated

• extended

what projection would have OID of the coracoacromial arch?

AP trauma Y shoulder

where is the CR centered for the lateral scapula?

mid-vertebral border

what type of joints are in the shoulder girdle?

diarthrodial

what is the correct angle for an AP axial clavicle on a hyposthenic patient?

30

where is the CR centered for bilateral AC joints?

1” above jugular notch

what term describes the medial end of the clavicle?

sternal extremity

what term describes the lateral end of the clavicle?

acromial extremity

what is the correct centering for unilateral AC joints?

1” below affected joint

what is the tube angle for a superioinferior shoulder view?

5-15