CT SHOULDER ARTHROGRAM

INDICATIONS: Rotator cuff tear, labral tear, shoulder pain

PATIENT PREP: None

IV CONTRAST: None

ORAL CONTRAST: None

POSITIONING: Feet first supine, arms by sides, hand supinated

TOPOGRAMS: AP. Range: Above Acromioclavicular joint through tip of Scapula. 35 mA, 120 kV

SCAN TYPE: Spiral/Helical

NOTES: Scan performed after intraarticular injection of contrast material into the shoulder joint by the radiologist. Check orders to see if referring

physician also wants steroid injection included.

Scan in True Anatomic Position. Then do 2mm Reconstructions in Axial/Coronal/Sagittal Planes.

Axials: Axial to True Anatomic Position

Coronals: Parallel to supraspinatus tendon.

Sagittals: Perpendicular to supraspinatus tendon.

FOR PRE-OP SHOULDERS include all of scapula in field of view. FOR PRE-OP SHOULDERS also perform Axial-Oblique Reconstruction:

Axial-Oblique to Scapular Body and Parallel to Scapular Spine, to get measurement of Glenoid version. See picture on CT Shoulder protocol.

Send Thin Slice Volume Source Images: Recon #1 (0.6 x 0.6mm) to PACS.

Check if referring physician has specific orders.

ALARA – Keep radiation dose As Low As Reasonably Achievable.

SHOULDER ARTHROGRAM

Scan
Range / Scan Direction
Scan Type / Respiration / Scan
Delay
(Seconds) / CARE
DOSE
4D / Quality
Reference
mAs / CARE
kV / Quality
Reference
kV / Detector Configuration
Slices Per Tube Rotation / Pitch
Table Increment/Speed:
(mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
Above AC Joint
To Tip of Scapula / Craniocaudal
Spiral/Helical / Quiet
Respiration / 2
Seconds / ON / 165 / Semi / 120 / Detectors: 64 x 0.6 mm
Slices Per Tube Rotation: 32 / Pitch: 0.8
Table Increment/Speed:
15.36 mm/rotation / 1.0
Seconds / 50
cm
Plane / SAFIRE
Strength / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON – AXIAL BONE
Send To PACS / Original Scan
Thin Slice Volume Source Images / ON
3 / 0.6 mm / 0.6 mm / I70h
Very Sharp ASA / Osteo
1500/450 / FOV Small
To Fit Anatomy
RECON – AXIAL BONE MPR
Axial to True Anatomic Position / Axial to True Anatomic Position
Recon Card 3D Axial MPR / ON
3 / 2.0 mm / 2.0 mm / I70h
Very Sharp ASA / Osteo
1500/450 / FOV Small
To Fit Anatomy
RECON – AXIAL SOFT TISSUE MPR
Axial to True Anatomic Position / Axial to True Anatomic Position
Recon Card 3D Axial MPR / ON
3 / 2.0 mm / 2.0 mm / I30s
Medium Smooth / Mediastinum
350/50 / FOV Small
To Fit Anatomy
RECON – CORONAL BONE MPR
Coronals: Parallel to Supraspinatus Tendon / Coronals: Parallel to Supraspinatus Tendon
Recon Card 3D Coronal MPR / ON
3 / 2.0 mm / 2.0 mm / I70h
Very Sharp ASA / Osteo
1500/450 / FOV Small
To Fit Anatomy
RECON – SAGITTAL BONE MPR
Sagittals: Perpendicular to Supraspinatus Tendon / Sagittals: Perpendicular to Supraspinatus Tendon
Recon Card 3D Sagittal MPR / ON
3 / 2.0 mm / 2.0 mm / I70h
Very Sharp ASA / Osteo
1500/450 / FOV Small
To Fit Anatomy
RECON – PRE-OP ONLY – AXIAL BONE OBLIQUE MPR
Axial-Oblique to Scapular Body and Parallel to Scapular Spine / Axial-Oblique to Scapular Body
And Parallel to Scapular Spine
Recon Card 3D Axial MPR / ON
3 / 2.0 mm / 2.0 mm / I70h
Very Sharp ASA / Osteo
1500/450 / FOV To
Include All Of Scapula

*The operator must check the CTDIvol before and after the scan to ensure it is within the allowed dose range. Scans performed outside of the allowed range must be

documented and reviewed by the designated radiologist and/or physicist.

Allowed CTDIvol Dose Ranges: 3 mGy – 50 mGy

XR29 Dose Notification Value (CTDIvol): 50 mGy

NETWORK: Exam to PACS

12/2017