CT SCAN OF PNS AXIAL & CORONALS
Also Known As
SENIOR
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FAMILY
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Certified Labs
NABH Accredited
Reports in
6hrs
Measures
No description available
Identifies
No identification information available
About The Test
CT SCAN OF PERIPHERAL VENOGRAM (also called CT venography or CTV leg veins) is the gold-standard imaging test for seeing inside deep and superficial veins of the lower limbs. The scan is quick, painless, and requires no overnight stay.
What is CT Venography?
CT venography is a specialised X-ray exam where iodine-based contrast dye is injected into a vein on the back of your hand. Within seconds, the CT scanner captures 360° images of your peripheral veins. A computer then rebuilds the pictures into a 3-D map that shows:
- Blood flow direction
- Narrowing or blockage
- Valve function
- Clot size and age
When and Who Needs to Take a CT Venography?
Your doctor may order a CT SCAN OF PERIPHERAL VENOGRAM if you have:
- Swollen, painful, or discoloured leg
- Family history of deep vein thrombosis (DVT)
- Varicose veins that ache or bleed
- Leg ulcers that refuse to heal
- Previous clot and new symptoms
- Planned vascular surgery or stent placement
List of Parameters
Radiologists at Cadabams check:
- Vein diameter (normal 4–12 mm)
- Contrast filling defects (clot)
- Collateral vessel formation
- Compression by surrounding muscles (May-Thurner)
- Venous reflux time
Why This Test
- Confirm or rule out DVT
- Plan laser or radio-frequency ablation for varicose veins
- Evaluate congenital venous malformations
- Monitor stent or filter position
- Identify source of recurrent pulmonary embolism
When to Take Test
Benefits
Benefits of Taking the Test
- Speed: 15-minute scan, 2-hour report
- Accuracy: 97 % sensitivity for DVT
- Comfort: No catheter inside the vein
- Safety: 70 % dose-reduction software
- Convenience: Online report access and free physician tele-cons
Illnesses Diagnosed with CT scan of PNS
- Deep vein thrombosis
- Superficial thrombophlebitis
- Chronic venous insufficiency
- Pelvic vein compression (May-Thurner syndrome)
- Venous ulcers
- Arteriovenous fistula
- Tumour invasion into veins
Preparing for test
24 hours before
- Drink 2 L water to hydrate kidneys
- Pause metformin if eGFR < 45 (doctor will advise)
Day of scan - Wear loose clothing; remove metal jewellery
- Eat light breakfast; fasting not mandatory
- Bring prior ultrasound or MRI reports for comparison
Pre-requisites
- Recent serum creatinine (within 30 days)
- Valid doctor’s prescription stating “CT SCAN OF PERIPHERAL VENOGRAM”
- Signed consent form (available online or at centre)
Best Time to Take the CT Venography
Morning appointments (8 am–12 pm) are ideal because:
- Lower foot swelling after overnight rest
- Faster contrast clearance in well-hydrated patients
- Same-day reporting before 5 pm
Eligibility
Age: 14–90 years
Weight: Up to 200 kg
GFR: ≥ 30 mL/min (or dialysis plan discussed with nephrologist)
Pregnancy: Deferred to post-delivery or alternative ultrasound offered
Procedure for Taking a CT Venography
- Check-in at Cadabams Diagnostics reception
- IV cannula insertion on dorsum of hand
- Lie on CT table, feet first
- Contrast injection (warm sensation for 10 s)
- 8-second scan while you hold still
- Post-scan observation for 10 min
- Collect printed report and CD within 2 hours
Caution Before Taking the Test
- Inform staff about prior iodine allergy—we pre-medicate with steroids if needed
- Diabetic patients on metformin: stop 48 h post-contrast and resume after kidney function recheck
- Wear comfortable cotton clothes; avoid saree or tight jeans
- Bring an attendant if you have mobility issues
Test Results
Results and Interpretations
| Finding / Observation | Description | General Interpretation / Significance |
|---|---|---|
| Normal veins | Veins are fully opacified with contrast, uniform in size, and show smooth flow | No evidence of clots, blockages, or venous insufficiency; normal venous anatomy |
| Filling defect (non-opacified area) | A section of vein does not fill with contrast; may look like a dark gap or "cutoff" | Highly suspicious for deep vein thrombosis (DVT) or clot; further evaluation needed |
| Compressed vein | A vein is narrowed or pinched, often near the pelvis or at crossover points | May indicate May-Thurner syndrome (iliac vein compression) or external compression; may require intervention |
| Enlarged collateral veins | Additional, winding veins visible beside main venous channels | Suggests chronic venous obstruction or previous DVT; indicates rerouted blood flow |
| Venous reflux | Contrast flows backward due to valve dysfunction during Valsalva maneuver | Points to venous insufficiency; common in varicose vein disease |
| Superficial thrombophlebitis | Inflammation with clot in a superficial vein, often near skin surface | Usually benign but may require local treatment; rarely leads to DVT |
Risks & Limitations
Risks (rare, <1 %)
- Mild contrast allergy (itching, rash)
- Kidney strain in pre-existing renal disease
- Bruising at injection site
Limitations - Claustrophobia is uncommon; our wide-bore scanner fits bariatric patients up to 200 kg
- Pregnancy is a relative contraindication—tell us if you are or could be pregnant
FAQs
Does the CT SCAN OF PERIPHERAL VENOGRAM hurt?
No. You will only feel a small needle prick for the IV line and brief warmth during contrast.
How soon can I resume work?
Immediately. There is no sedation or recovery time.
Will I get claustrophobic?
Unlikely. Our scanner has a 78 cm wide bore and your head remains outside the gantry.
Is the radiation dose safe?
Yes. Effective dose is ~2 mSv, equal to 6 months of natural background; dose-reduction software is always on.
When will I get my results?
Typically, the radiologist's formal report will be completed and sent to your referring doctor within 24-48 hours. Your doctor's office will then contact you to discuss the findings.