AORTA – CHEST

ANEURYSM/DISSECTION

INDICATIONS: Aneurysm, dissection.“CTA: Aorta, PE. No need to do pre unless looking for acute intramural hematoma or looking at stent grafts.”

PATIENT PREP: NPO for solid food, water only, for 4 hours prior to scan

IV CONTRAST: 100mL Isovue 370 @ 4-5 mL/second

ORAL CONTRAST: None

POSITIONING: Feet First Supine

TOPOGRAMS: AP & Lateral

SCAN TYPE: Spiral/Helical

NOTES: ANEURYSM: Scan Range: Thoracic Inlet to Renal Arteries

*FOR HISTORY OF ANEURYSM, USUALLY WITH CONTRAST ONLY, RADIOLOGIST TO PROTOCOL

DISSECTION: Scan Range: Thoracic Inlet to Aortic Bifurcation

*IF DISSECTION PROTOCOL, OBTAIN ORDER FOR CTANGIO CHESTAND AN ORDER FOR CT ANGIO ABDOMEN.

*NONCONTRAST SCAN TO BE PERFORMED FOR DISSECTION PROTOCOL

Send Recon-3D 0.75x0.4mm to Vital Workstation for 3D.

Bill for 3D (No Charge)

ALARA – Keep radiation dose As Low As Reasonably Achievable.

NONCONTRAST

Scan
Range / Scan
Direction / Respiration / Scan
Delay
(Sec) / CARE
DOSE
4D / Quality
Reference
mAs / kV / Collimator(mm)
Slices Per Tube Rotation / Pitch
Table Increment/Speed: (mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
ANEURYSM:Thoracic Inlet to
Renal Arteries
DISSECTION: Thoracic Inlet to
Aortic Bifurcation / Craniocaudal / Suspended Inspiration / 5
Sec / On / 120 / 110 / Collimator: 1.2 mm
Slices Per Tube Rotation: 16 / Pitch: 0.8
Table Increment/Speed: 15.36mm/rot / 0.6sec / 50
cm
Plane / SliceThickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON / Axial / 5.0 mm / 5.0 mm / B30f
Medium Smooth / Abdomen
400/40 / FOV just beyond
patient’s body

ARTERIAL

Scan
Range / Scan
Direction / Respiration / Scan
Delay
(Seconds) / CARE
DOSE
4D / Quality
Reference
mAs / kV / Collimator(mm)
Slices Per Tube Rotation / Pitch
Table Increment/Speed:
(mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
ANEURYSM: Thoracic Inlet to
Renal Arteries
DISSECTION: Thoracic Inlet to
Aortic Bifurcation / Craniocaudal / Suspended
Inspiration / CARE BOLUS Tracking
(Trigger 150 HU)
Plus 5 Second Delay / On / 90 / 110 / Collimator: 0.6 mm
Slices Per Tube Rotation: 16 / Pitch: 1.3
Table Increment/Speed:
12.48mm/rotation / 0.6
seconds / 50
cm
Plane / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON / Axial / 2.0 mm / 2.0 mm / B35s
HeartView Medium / Mediastinum
450/50 / FOV just beyond
patient’s body
RECON / Axial / 3.0 mm / 3.0 mm / B70s
Very Sharp / Lung
1500/-700 / FOV just beyond
patient’s body
RECON
Coronals Angled in Plane to Body Part / Coronals Angled in Plane to Body Part
Recon Card 3D Coronal / 2.0 mm / 2.0 mm / B35s
HeartView Medium / Mediastinum
450/50 / FOV just beyond
patient’s body
RECON
Sagittals Angled in Plane to Body Part / Sagittals Angled in Plane to Body Part
Recon Card 3D Sagittal / 2.0 mm / 2.0 mm / B35s
HeartView Medium / Mediastinum
450/50 / FOV just beyond
patient’s body
RECON
Oblique Sagittals “Candy Cane” / Oblique Sagittals “Candy Cane”
Recon Card 3D Sagittal/Oblique / 2.0 mm / 2.0 mm / B35s
HeartView Medium / Mediastinum
450/50 / FOV just beyond
patient’s body
RECON – 3D
Send to Vital Workstation for 3D / Axial / 0.75 mm / 0.4 mm / B35s
HeartView Medium / Mediastinum
450/50 / FOV just beyond
patient’s body

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CARE BOLUS
Location / Monitor
Delay / Arterial
Delay / mAs / kV / InterScan Delay
(Cycle Time) / Threshold
Proximal Descending Aorta / 15 seconds / 5 seconds / 40 / 110 / 1.5 seconds / 150 HU

*IF DISSECTION PROTOCOL: OBTAIN ORDER FOR CT ANGIO CHEST AND AN ORDER FOR CT ANGIO ABDOMEN.

*If a NONCONTRAST scan is performed, the charge for the NONCONTRAST scan is included in the ANGIO charge.

CHARGES:ANEURYSM: CACHE/3D (No Charge Added)

DISSECTION: CACAP/3D (No Charge Added) (Obtain Order for CT ANGIO CHEST AND an order for CT ANGIO ABDOMEN)

NETWORK:Exam to PACS

Send Recon-3D 0.75x0.4mm to Vital Workstation for 3D

5/2014Page 2 of 2