CTV Head

Last Updated: 2026-01-01 Author:

1. Clinical Summary
Acquisition SummaryClinical Indications
Series Phase Coverage

NC Head N/A Vertex → Foramen magnum

CTV Head 60-90 sec delay Skull base → Vertex
- Venous sinus thrombosis
- Dural sinus thrombosis
- Intracranial hypertension
- Venous malformation
2. Patient Prep
- Position: Supine head-first
- NPO Status: NPO 2 hours
- Pre-Medication:
  - None required
3. IV Contrast & Injection

Injection ParametersLab Requirements

Parameter Value

Agent Isovue 370

Volume 75-100 mL

Flow Rate 3-4 mL/s

Duration 15-20s

Timing Method Fixed Delay

ROI Placement

Trigger (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
- NC Head then delayed venous CTV (60-90 sec). Skull base to vertex. Assess venous sinuses
- 18-20G IV
Safety First

Renal Function: Verify eGFR > 30

Allergy: Check allergy history
- NC: hemorrhage. CTV: filling defects in sinuses. Venous thrombosis. Cortical vein thrombosis
- Delayed timing 60-90 sec. Look for filling defects

Series AcquisitionPost-Processing

Series Name	Start Location	End Location	Delay	Slice Thickness	Notes
NC Head	Vertex	Foramen magnum	N/A	5 mm	Baseline
CTV Head	Skull base	Vertex	60-90 sec delay	0.625-1 mm	Venous phase

Plane	Acquisition	FOV	Thickness/Increment	Kernel	IR Strength	Notes
Axial	CTV	Head	1 mm/1 mm	Brain	3	Venous sinuses
MIP	CTV	Sinuses	Thick slab	Brain	N/A	Venogram overview
3D VR	CTV	Venous system	1 mm source	Brain	N/A	3D venogram
Sagittal	CTV	Midline	1.5 mm	Brain	3	Sagittal sinus

Series	Phase	Coverage
NC Head	N/A	Vertex → Foramen magnum
CTV Head	60-90 sec delay	Skull base → Vertex