CT SHOULDER

INDICATIONS: Trauma, fracture, dislocation, pre-operative

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. 25 mA, 110 kV.

SCAN TYPE: Spiral/Helical

NOTES: 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.

Send Thin Slice Volume Source Images: Recon #1 (0.75 x 0.7mm) to PACS.

*3D Only if Ordered by Referring Physician or requested by Radiologist. Obtain order for 3D from referring physician.

For 3D Only: Send Recon 3D (0.75 x 0.4mm) to Vital Workstation for 3D and call Spokane.

Check if referring physician has specific orders.

ALARA – Keep radiation dose As Low As Reasonably Achievable.

SHOULDER

Scan
Range / ScanDirection
Scan Type / Respiration / Scan
Delay
(Seconds) / CARE
DOSE
4D / Quality
Reference
mAs / kV / Detector Configuration
Slices Per Tube Rotation / Pitch
Table Increment/Speed: (mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
Above AC Joint ToTip of Scapula / Craniocaudal
Spiral/Helical / Quiet
Respiration / 3
Seconds / ON / 100 / 130 / Detectors: 16 x 0.6 mm
Slices Per Tube Rotation: 16 / Pitch: 0.8
Table Increment/Speed: 7.68mm/rotation / 1.0
Seconds / 50
cm
Plane / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON – AXIAL BONE
Send To PACS / Original Scan
Thin Slice Volume Source Images / 0.75 mm / 0.7 mm / B70s
Sharp / Osteo
1500/450 / FOVSmall
To Fit Anatomy
RECON – AXIAL BONE MPR
Axial to True Anatomic Position / Axial to True Anatomic Position
Recon Card 3D Axial MPR / 2.0 mm / 2.0 mm / B70s
Sharp / 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 / 2.0 mm / 2.0 mm / B30s
Medium Smooth / Mediastinum
400/40 / FOV Small
To Fit Anatomy
RECON – CORONAL BONE MPR
Coronals: Parallel to Supraspinatus Tendon / Coronals: Parallel to Supraspinatus Tendon
Recon Card 3D Coronal MPR / 2.0 mm / 2.0 mm / B70s
Sharp / 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 / 2.0 mm / 2.0 mm / B70s
Sharp / Osteo
1500/450 / FOV Small
To Fit Anatomy
RECON – PRE-OP ONLY – AXIAL BONE OBLIQUE MPR
Axial-Oblique to Scapular Body and Parallel toScapular Spine / Axial-Oblique to Scapular Body
And Parallel to Scapular Spine
Recon Card 3D Axial MPR / 2.0 mm / 2.0 mm / B70s
Sharp / Osteo
1500/450 / FOV To
Include All Of
Scapula
RECON – 3D ONLY – AXIAL SOFT TISSUE
Send To Vital WorkStation for 3D / Original Scan For 3D Only
Thin Slice Volume Source Images With Overlap / 0.75 mm / 0.4 mm / B30s
Medium Smooth / Mediastinum
400/40 / FOV Small
To Fit Anatomy

*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

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CHARGES:Bill for 3D in Charges section when ending exam: “3D POST PROCESSING CT”. (Obtain Order for 3D)

NETWORK:Exam to PACS

For 3D Only: Send Recon 3D (0.75 x 0.4mm) to Vital Workstation for 3D and call Spokane

12/2017Page 2 of 4