CTA Abdomen Pelvis

Last Updated: 2026-01-01 Author:

1. Clinical Summary

Acquisition SummaryClinical Indications

Series	Phase	Coverage
Non-contrast	Non-contrast	Diaphragm to Lesser Trochanters
CTA Arterial	Arterial (bolus tracked)	Diaphragm to Lesser Trochanters
Stent Delay (optional)	Delay (40s)	1cm above and below stent

2. Patient Prep
- Position: Supine with arms raised
- NPO Status: NPO 4 hours
- Pre-Medication:
  - Oral contrast optional - omit for vascular indication
3. IV Contrast & Injection

Injection ParametersLab Requirements

Parameter Value

Agent Isovue 370

Volume 1.1 mL/kg

Flow Rate 4 mL/s

Duration 20s

Timing Method Bolus Tracking

ROI Placement Abdominal aorta at celiac

Trigger (HU) 150 HU

Use full dose if GFR > 30

If GFR < 30

Max Contrast = \(2*\left[\frac{\text{Patient Weight}}{75 \text{ kg}} * \text{eGFR}\right]\)
4. Special Notes
Technologist NotesNursing NotesRadiologist NotesTips & Tricks
- Caudocranial scan direction. Include renal arteries to femoral bifurcation minimum
- Additional Recons: 3D VR and curved MPR. Measure AAA in 3 planes
- 18-20G IV antecubital
Safety First

Renal Function: Verify eGFR > 30

Allergy: Check allergy history
- Measure AAA if present. Assess renal and mesenteric arteries. Evaluate iliac vessels
- Arms raised. No oral contrast for pure vascular study

Series AcquisitionPost-Processing

Series Name	Start Location	End Location	Delay	Slice Thickness	Notes
Scout/Topogram	Diaphragm	Femoral heads	N/A	N/A	AP lateral
CTA Arterial	Diaphragm	Femoral heads	Bolus tracked	0.625 mm	Caudocranial direction
Stent Delay (optional)	Top of Stent	Bottom of Stent	40 sec	0.625 mm	Stent coverage

Plane	Acquisition	FOV	Thickness/Increment	Kernel	IR Strength	Notes
Axial	Arterial	Abdomen	2 mm/2 mm	Vascular	3	Abdominal aorta and visceral branches
Axial	Arterial	Pelvis	2.5 mm/2.5 mm	Vascular	3	Iliac vessels
Coronal	Arterial	Full AP	3 mm/3 mm	Vascular	3	MIP coronal aorta and branches
Sagittal	Arterial	Full AP	3 mm/3 mm	Vascular	3	Curved MPR of aorta