Week 6 - Bumped up shoulder

Flashcards covering key concepts from the lecture on the Bumped Up shoulder projection.

What is the Bumped Up (BU) shoulder projection used for?

For patients who cannot fully abduct their arm for an inferosuperior axial projection.

What joint does the BU shoulder demonstrate?

The glenohumeral (GH) joint.

What is the aim of the BU shoulder projection?

To superimpose the superior and inferior glenoid edges.

How can you find the superior glenoid edge?

Locate the coracoid process—it’s attached to the superior glenoid.

What is the recommended kVp for this projection?

75 kVp.

What IR size and grid use is typical for thin patients?

18×24 cm, no grid.

What IR size is used for thicker patients?

24×30 cm, with a grid.

What breathing instruction should be given?

Suspend respiration.

Where should the tube head be positioned?

Rotated beside the table, near the patient’s shoulder.

Should the patient be centered on the table?

No, position them near the edge for beam access.

Can the patient be angled on the table?

Yes, slightly if needed for optimal beam path.

What replaces the pillow under the patient?

A positioning sponge.

How should the patient position their arm?

Bring the affected arm across the chest.

What two movements help position the humerus?

Lift anteriorly, then move the elbow laterally.

What tool helps support the patient’s position?

Sponges.

What might asthenic patients need additionally?

Shoulder elevation.

What must be avoided during setup?

Torso rotation.

How should the head be positioned?

Turned away from the affected side.

What marker is required?

Horizontal beam or cross-table marker.

What determines grid use?

Arm height and part thickness.

What CR angle is used?

15–20° toward the MSP.

Where should the CR exit?

At the acromioclavicular joint (ACJ).

What is the central point (CP)?

Mid-axilla.

Where should the image plate (IP) be positioned?

Below the mattress or under the shoulder.

Which structures must be visible?

Entire shoulder joint and coracoid process.

What indicates good image quality?

Open GH joint and visible trabecular detail.

What alignment shows correct angulation?

Inferior glenoid margin aligned with lateral coracoid base.

What error occurs if the inferior glenoid appears medial?

Excess angle (beam too steep).

What error occurs if the inferior glenoid appears lateral?

Insufficient angle (beam too shallow).

Which structure is projected first by the beam?

The structure hit first by the X-ray beam appears projected in that direction.