Medically reviewed by Prof. Dr. Aamer Nadeem Chaudhary, M.B.B.S., D.M.R.D., F.C.P.S. (Diagnostic Radiology) — Professor of Radiology & Consultant Radiologist, Al-Nasar Lab & Diagnostic Centre · Updated June 2026.
Quick answer: A CT scan without contrast is enough for many problems — kidney stones, bone fractures, head trauma and many lung studies. A CT with contrast uses an iodine-based dye to make blood vessels, organs and abnormal areas far clearer, so it is used for cancers, infections, and vascular studies. Your doctor decides which you need. At Al-Nasar Lab in Lahore, CT scans start from PKR 10,000 on a 128-slice scanner (contrast charged separately).
What is CT contrast?
Contrast (often called “dye”) is an iodine-based liquid given through a vein or by mouth. It temporarily highlights blood vessels, soft tissue and abnormal areas so the radiologist can see them clearly on the scan.
CT with vs without contrast
| Feature | Without contrast | With contrast |
|---|---|---|
| Dye injection | No | Yes (IV or oral) |
| Best for | Kidney stones, bones, head trauma, many lung scans | Cancers, infections, blood vessels, detailed abdomen/liver |
| Preparation | Usually none | Fasting ~4 hours; kidney function may be checked |
| Time | A few minutes | Slightly longer |
When is contrast needed?
- Detecting or staging cancers and tumours
- Infections and abscesses
- Blood-vessel studies (CT angiography)
- Detailed abdomen, liver and pelvic imaging
When is contrast usually not needed?
- Kidney and ureter stones
- Head trauma or suspected stroke (initial scan)
- Many chest and lung studies
- Bone fractures
Is CT contrast safe?
For most people, yes. Tell your doctor or our technologist if you have kidney problems, diabetes, asthma, or a previous reaction to contrast — a simple creatinine blood test may be checked first. A brief feeling of warmth or a metallic taste during the injection is normal and passes quickly.
How to prepare for a contrast CT
- Fast for about 4 hours (water is usually allowed)
- Stay well hydrated before and after
- Bring your doctor’s prescription and any previous reports
- Tell staff about allergies, kidney issues, or if you take metformin
CT scan at Al-Nasar Lab
Al-Nasar Lab performs CT on a fast 128-slice scanner with experienced radiologists and same-day digital reports, in Johar Town, Lahore. CT scans start from PKR 10,000.
Contrast media is charged separately. Rates may have been revised since publication — please show your doctor’s prescription at our front desk for confirmed total charges.
Frequently Asked Questions
Do I need contrast for my CT scan?
It depends on what your doctor is looking for. Contrast is used for cancers, infections and blood-vessel studies; stones, fractures and many head/lung scans don’t need it.
Is the contrast injection painful?
No. It’s a small needle prick, often with a brief warm sensation that passes quickly.
How much does a CT scan cost in Lahore?
At Al-Nasar Lab, CT scans start from PKR 10,000; contrast is charged separately. Show your prescription at the front desk for confirmed charges.
Do I need to fast before a CT scan?
For a contrast CT, fast about 4 hours beforehand. A plain CT usually needs no preparation.
Related reading: MRI vs CT Scan: which do you need?
See also: CT scan in Pakistan: prices & types
Need a CT scan in Lahore? Book today at Al-Nasar Lab — 128-slice CT, same-day reports. Book on WhatsApp or call 0300 0341944.
