Ct Renal with Arterial

CT RENAL WITH ARTERIAL

INDICATIONS: ONLY FOR: Pre & Post CryoAblation, Embolization, Clear Cell Carcinoma, Living Related Donor

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

IV CONTRAST: Perform as directed by the supervising radiologist.

125mL Isovue 370 @ 4.0 mL/second

ORAL CONTRAST: 32 oz Water 30 Minutes Prior to Scan, and12 oz Water Immediately Prior to Scan.

POSITIONING: Feet First Supine, Arms above head

TOPOGRAMS: AP. Range: Dome of diaphragm through iliac crest/through kidneys. 25 mA, 110 kV.

SCAN TYPE: Spiral/Helical

NOTES: CARE BOLUS triggered Arterial scan.

ALARA – Keep radiation dose As Low As Reasonably Achievable.

NONCONTRAST

MONITORING

ScanRange
CARE BOLUS
Monitoring Location / Scan Direction
Scan Type
Number of Scans / Respiration / Threshold / Scan
Delay
Seconds / CARE
DOSE
4D / mAs / kV / Detector Configuration
Slices Per Tube Rotation / Table
Feed / InterScan
Delay
(CycleTime)
Seconds / Scan
Time
Seconds / SFOV
(cm)
Single Slice
Abdominal Aorta
First Slice of Arterial Scan / Craniocaudal
Sequential
30 scans / Quiet
Respiration / 150 HU / 15
Seconds / OFF / 50 / 110 / Detectors: 2 x 5.0 mm
Slices Per Tube Rotation: 1 / 0.0 mm / 1.2
Seconds / Full
0.6Sec / 50
cm
Plane / Slice
Thickness / Interval/
Table Feed / Kernal / Window
Width/Level / DFOV
(cm)
RECON – AXIAL SOFT TISSUE / Axial / 9.6 mm / 0.0 mm / B35s
HeartView Medium / Abdomen
300/40 / Small FOV large enough to
Cover region of interest

ARTERIAL

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NEPHROGRAPHIC PHASE

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)
Dome of Diaphragm
ToIliac Crest/
Below Kidneys / Craniocaudal
Spiral/Helical / Suspended
Inspiration / 100 Seconds From
Start of Injection. (Approximately 55-60Seconds From End ofArterial) / ON / 120 / 110 / Detectors: 16 x 1.2 mm
Slices Per Tube Rotation: 16 / Pitch: 0.8
Table Increment/Speed: 15.36 mm/rotation / 0.6
seconds / 50
cm
Plane / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON - AXIAL SOFT TISSUE / Axial / 3.0 mm / 3.0 mm / B30s
Medium Smooth / Abdomen
300/40 / FOV just beyond
patient’s body
RECON – AXIAL LUNG / Axial / 1.5 mm / 1.0 mm / B70s
Sharp / Lung
1200/-600 / FOV just beyond
patient’s body
RECON – CORONAL SOFT TISSUE MPR
Coronals Angled in Plane to Body Part / Coronals Angled in Plane to Body Part
Recon Card 3D Coronal MPR / 3.0 mm / 3.0 mm / B30s
Medium Smooth / Abdomen
300/40 / FOV just beyond
patient’s body
RECON – SAGITTAL SOFT TISSUE MPR
Sagittals Angled in Plane to Body Part / Sagittals Angled in Plane to Body Part
Recon Card 3D Sagittal MPR / 3.0 mm / 3.0 mm / B30s
Medium Smooth / Abdomen
300/40 / FOV just beyond
patient’s body

PYELOGRAPHIC PHASE

Scan
Range / ScanDirection
Scan Type / Respiration / ScanDelay / CARE
DOSE
4D / Quality
Reference
mAs / kV / Detector Configuration
Slices Per Tube Rotation / Pitch
Table Increment/Speed:
(mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
Dome of Diaphragm
To Iliac Crest/
Below Kidneys / Craniocaudal
Spiral/Helical / Suspended
Inspiration / 6 Minutes From
Start of Injection.
(Approximately 250 SecondsFrom End of Nephrographic) / ON / 120 / 110 / Detectors: 16 x 1.2 mm
Slices Per Tube Rotation: 16 / Pitch: 0.8
Table Increment/Speed: 15.36 mm/rotation / 0.6
seconds / 50
cm
Plane / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON – AXIAL SOFT TISSUE / Axial / 3.0 mm / 3.0 mm / B30s
Medium Smooth / Abdomen
300/40 / FOV just beyond
patient’s body

*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

Approximate Values for CTDIvol
Patient Size / Weight (kg) / Weight (lbs) / CTDIvol (mGy)
Small / 50-70 / 110-155 / 10-17
Average / 70-90 / 155-200 / 15-25
Large / 90-120 / 200-265 / 22-35
Reference: AAPM

*The AAPM recommended NEMA XR29 Dose Notification Value for an adult torso is 50 mGy. Dose notification levels less than the AAPM recommended can be set. The maximum CTDIvol should match the dose notification value. Exams with CTDIvol values less than the minimum allowed range should not be performed unless approved by a radiologist.

NETWORK:Exam to PACS

5/2018Page 2 of 2