INDICATIONS: Aneurysm

HEAD ANGIO

INDICATIONS: Aneurysm

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

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

ORAL CONTRAST: None

POSITIONING: Head First Supine.

Position the patient’s head to superimpose the supraorbital ridge and the inner table of the skull at the foramen magnum along a line.

(Axial Plane: 25 degrees Caudad to Reid’s Baseline)

TOPOGRAMS: AP & Lateral. Topogram from top of head through aortic arch.

SCAN TYPE: Spiral/Helical

NOTES: Perform NonContrast scan on most exams. Check with radiologist on patients with recent CT/MR Head scans, young patients, or follow-up aneurysm.

Send to Vital Worktation for 3D. Add charge for 3D (No Charge)

ALARA – Keep radiation dose As Low As Reasonably Achievable.

NONCONTRAST

Scan
Range / Scan Direction/
Scan Type / Respiration / Scan Delay / CARE
DOSE
4D / Effective
mAs / kV / Collimator (mm)
Slices Per Acquisition / Pitch
Table Increment/Speed: (mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
Base of Skull
Through Vertex / Caudocranial
Spiral/Helical / Quiet
Respiration / 4 Seconds / OFF / 240 / 130 / Collimator: 0.6 mm
Slices Per Tube Rotation: 16 / Pitch: 0.8
Table Increment/Speed: 7.6 mm/rotation / 1.0
Seconds / 30
cm
Plane / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON
Axial / Axial Plane: 25 degrees Caudad to Reid’s Baseline – Superimpose the supraorbital ridge and the inner table of the skull at the foramen magnum along a line / 5.0 mm / 5.0 mm / H30s
Medium Smooth / Cerebrum
80/35 / FOV just beyond
Patient’s head
RECON
Axial / Axial Plane: 25 degrees Caudad to Reid’s Baseline – Superimpose the supraorbital ridge and the inner table of the skull at the foramen magnum along a line / 5.0 mm / 5.0 mm / H70h
Very Sharp / Osteo
3000/300 / FOV just beyond
Patient’s head
RECON
Coronals Angled in Plane to Body Part / Coronals Angled in Plane to Body Part
Recon Card 3D Coronal / 5.0 mm / 5.0 mm / H30s
Medium Smooth / Cerebrum
80/35 / FOV just beyond
Patient’s head
RECON
Sagittals Angled in Plane to Body Part / Sagittals Angled in Plane to Body Part
Recon Card 3D Sagittal / 5.0 mm / 5.0 mm / H30s
Medium Smooth / Cerebrum
80/35 / FOV just beyond
Patient’s head

ARTERIAL

Scan
Range / Scan Direction/
Scan Type / Respiration / Scan
Delay
(Seconds) / CARE
DOSE
4D / Effective
mAs / kV / Collimator (mm)
Slices Per Tube Rotation / Pitch
Table Increment/Speed: (mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
Below Base of Skull
Through Vertex / Caudocranial
Spiral/Helical / Quiet
Respiration / CARE Bolus Tracking
(Trigger 50 HU)
Plus 4 Second Delay / OFF / 100 / 110 / Collimator: 0.6 mm
Slices Per Tube Rotation: 16 / Pitch: 1.15
Table Increment/Speed: 13.8 mm/rotation / 0.6
seconds / 30
cm
Plane / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON / Axial Plane: 25 degrees Caudad to Reid’s Baseline – Superimpose the supraorbital ridge and the inner table of the skull at the foramen magnum along a line / 1.0 mm / 1.0 mm / H30s
Medium Smooth / Mediastinum
450/50 / FOV just beyond
patient’s head
RECON – 3D
Send To Vital Workstation for 3D / Axial Plane: 25 degrees Caudad to Reid’s Baseline – Superimpose the supraorbital ridge and the inner table of the skull at the foramen magnum along a line / 0.75 mm / 0.4 mm / H30s
Medium Smooth / Mediastinum
450/50 / FOV just beyond
patient’s head
RECON
Coronals Angled in Plane to Body Part / Coronals Angled in Plane to Body Part
Recon Card 3D Coronal / 1.0 mm / 1.0 mm / H30s
Medium Smooth / Mediastinum
450/50 / FOV just beyond
patient’s head
RECON
Sagittals Angled in Plane to Body Part / Sagittals Angled in Plane to Body Part
Recon Card 3D Sagittal / 1.0 mm / 1.0 mm / H30s
Medium Smooth / Mediastinum
450/50 / FOV just beyond
patient’s head
RECON
Coronal MIPS Angled in Plane to Body Part / Coronal MIPS Angled in Plane to Body Part
Recon Card 3D Coronal MIP Thin / 5.0 mm / 2.0 mm / H30s
Medium Smooth / Mediastinum
450/50 / FOV just beyond
patient’s head
RECON
Sagittal MIPS Angled in Plane to Body Part / Sagittal MIPS Angled in Plane to Body Part
Recon Card 3D Sagittal MIP Thin / 5.0 mm / 2.0 mm / H30s
Medium Smooth / Mediastinum
450/50 / FOV just beyond
patient’s head

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CARE Bolus
Location / Monitor
Delay / Arterial
Delay / mAs / kV / InterScan Delay
(Cycle Time) / Threshold
Aortic Arch / 10 seconds / 4 seconds / 40 / 110 / 1.25 seconds / 50 HU

*IF a NonContrast scan is performed, the charge is included in the Angio charge.

CHARGES: CAHEAD/3D (No Charge)

NETWORK: Exam to PACS

Recon #2 to Vital Workstation for 3D Only

11/2015 Page 2 of 2