A knee CT scan (computed tomography) is an imaging test that uses X‑rays and computer processing to create detailed cross‑sectional images of the knee’s bones, cartilage, ligaments, and surrounding soft tissues. It’s especially useful for evaluating complex fractures, joint alignment, bone lesions, and planning surgery. Scans are quick, may use contrast for extra detail, and involve exposure to ionizing radiation.

CT scan of the knee typically costs vary by country and facility: in India roughly ₹1,500–8,000; in the United States about $300–$3,000 without insurance; in the UK it's usually free for eligible patients via the NHS but private scans can run £100–£500. Final price depends on facility, contrast use, and whether insurance or public healthcare covers it.

An X-ray is usually the first test for bones and arthritis, but MRI is the best scan for most knee pain because it visualizes ligaments, menisci, cartilage and bone marrow. Ultrasound helps assess superficial soft tissues and fluid; CT is used mainly for complex fractures or surgical planning. Your clinician will choose the appropriate scan based on exam and suspected diagnosis.

A CT scan of the left leg is a medical imaging test that uses X-rays and computer processing to produce detailed cross-sectional images of bones, joints, muscles, blood vessels and soft tissues. It helps detect fractures, complex injuries, infections, tumours or vascular problems. The test is quick and noninvasive, may use contrast dye for better detail, and involves radiation exposure.

MRI is generally better for evaluating the knee’s soft tissues—ligaments, menisci, cartilage and bone marrow—without radiation, so it’s preferred for most sports injuries and internal joint problems. CT excels at detailed bone imaging, complex fractures and preoperative 3D planning. Choice depends on suspected injury, need for bone detail, patient contraindications (e.g., pacemaker) and availability.

Wear loose, comfortable clothing that’s easy to move and free of metal for a knee CT scan. Shorts or loose pants are ideal; avoid zippers, buttons, underwire bras, and jewelry near the knee. Remove knee braces, piercings, belts and other metallic objects before scanning. You may be asked to change into a hospital gown, so bringing a light layer for warmth is useful.