CTV Abdomen Pelvis

Last Updated: 2026-01-01 Author:

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• 1. Clinical Summary

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  Acquisition SummaryClinical Indications

  Series	Phase	Coverage
  CTV Venous Phase	Contrast (110 sec delay)	Diaphragm to Proximal femur

  • Deep vein thrombosis
  • May-Thurner syndrome
  • IVC filter placement planning
  • Venous malformation

• 2. Patient Prep

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  • Position: Supine with arms raised
  • NPO Status: NPO 2-4 hours
  • Pre-Medication:
    • Oral contrast optional

• 3. IV Contrast & Injection

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  Injection ParametersLab Requirements

  Parameter	Value
  Agent	Isovue 370
  Volume	2.0 mL/kg
  Flow Rate	3 mL/s
  Duration	40s
  Timing Method	Fixed Delay (110s)

  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

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  Technologist NotesNursing NotesRadiologist NotesTips & Tricks

  • Scan at 180 seconds for venous phase. Slower injection rate OK for venous imaging. Scan from diaphragm to femoral veins
  • Additional Recons: MIP venograms. 3D VR of venous system

  • 18-20G IV

  Safety First

  • Renal Function: Verify eGFR > 30
  • Allergy: Check allergy history

  • Assess IVC iliac femoral veins for thrombosis. Look for compression (May-Thurner). Measure vessel caliber for filter sizing

  • Arms raised. May add leg veins if DVT suspected

Series AcquisitionPost-Processing

Series Name	Start Location	End Location	Delay	Slice Thickness	Notes
Scout/Topogram	Diaphragm	Proximal femur	N/A	N/A	AP
CTV Venous Phase	Diaphragm	Proximal femur	180 sec	0.625 mm	Extended delay for venous opacification

Plane	Acquisition	FOV	Thickness/Increment	Kernel	IR Strength	Notes
Axial	Venous	Full AP	2.5 mm/2.5 mm	Standard	3	Assess for filling defects
Coronal	Venous	Full AP	3 mm/3 mm	Standard	3	MIP of venous system
Sagittal	Venous	Full AP	3 mm/3 mm	Standard	3	IVC and iliac veins
3D VR	Venous	Full AP	2 mm source	Standard	3	3D venous anatomy