CT CHEST/ABDOMEN/PELVIS

INDICATIONS: Cancer restaging

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

IV CONTRAST: Perform as directed by the supervising radiologist.

With:100mL Isovue 370 @ 2-3 mL/second

WithOut:None

ORAL CONTRAST: Perform as directed by the supervising radiologist.

Routine: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: Above lung apices through iliac crest. 25 mA, 110 kV.

SCAN TYPE: Spiral/Helical

NOTES: Entire scan performed in a single acquisition.

ALARA – Keep radiation dose As Low As Reasonably Achievable.

CHEST/ABDOMEN/PELVIS

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 Lung Apices Through
Ischial Tuberosities / Craniocaudal
Spiral/Helical / Suspended
Inspiration / Adjust to Scan Liver At
70Seconds
(Approximately 61-63 Second Scan Delay) / 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 – AXIAL MIPS
Axial MIPS Through Chest / Axial MIPS
Recon Card 3D Axial MIP Thin / 10.0 mm / 2.0 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
Approximate Values for CTDIvol (Single Acq.)
Patient Size / Weight (kg) / Weight (lbs) / CTDIvol (mGy)
Small / 50-70 / 110-155 / 7-16
Average / 70-90 / 155-200 / 11-24
Large / 90-120 / 200-265 / 14-34

Reference: AAPM

*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 mGyPage 1 of 2

*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