Weight-Bearing CT

Weight-bearing computed tomography, or weight-bearing CT, is an imaging examination that creates cross-sectional views while the relevant body part is loaded. Depending on the scanner and examination, a person may stand or place weight through a foot, ankle or lower limb. The images can show bone alignment and joint relationships in a position that differs from lying down.

The imaging technologist explains how to position yourself and whether to stand fully or use a specified amount of support. You must stay still during image capture. The scan itself is brief, although positioning and safety checks take additional time. A radiologist reviews the images and sends a report to the clinician who requested the examination. This technology may be used within a Musculoskeletal CT Scan pathway.

A weight-bearing CT cannot show every type of soft-tissue problem, and load during the scan may not reproduce every movement that causes symptoms. It also uses ionising radiation, so the clinical team considers whether the examination is needed. Alternatives include standard CT, weight-bearing or non-weight-bearing X-rays, MRI or ultrasound. The appropriate test depends on the question being investigated.

A standard CT commonly images a person lying down, while weight-bearing CT adds information about alignment under load. X-rays can provide useful standing views with a simpler image format. MRI is better suited to many soft-tissue questions and does not use ionising radiation. These examinations answer different questions, so one cannot automatically replace another.

Your clinician may request weight-bearing CT when symptoms or examination findings suggest that alignment changes with loading are relevant. Wear clothing that allows access to the area and tell the imaging team if you may be pregnant, have difficulty standing or cannot keep still. The radiologist’s report is interpreted alongside your history and physical examination rather than on its own.

Tell the imaging team about possible pregnancy before the scan so the request and technique can be reviewed. Follow instructions about removing metal objects and maintaining the required position. Mention dizziness, balance problems or pain that makes standing unsafe; staff can discuss suitable support or another approach. Seek medical advice for symptoms that suddenly worsen rather than waiting for an imaging appointment.