A computed tomography (CT) scan is an advanced imaging procedure that uses X-rays to create detailed cross-sectional images of your body’s internal structures. Whether a wig can be worn during this test depends primarily on the scan location and the wig’s composition. For CT scans targeting the head or neck, the general instruction is to remove the wig. This is because metallic components or any dense material near the area being examined can interfere with the image quality and compromise the diagnostic value of the results.
Understanding the Impact of Metal on CT Scans
CT technology works by measuring how much X-ray radiation is absorbed as it passes through different tissues in the body. Metal, such as iron or stainless steel, has a significantly higher density compared to biological tissues. This high density causes the metal to absorb or scatter nearly all the X-rays, which the scanner’s detectors cannot accurately measure. This data corruption creates visual anomalies on the final image known as artifacts.
These artifacts typically manifest as bright, streaking lines or dark shadows radiating outward from the metallic object. The streaks can completely obscure surrounding anatomical structures, making it impossible for a radiologist to assess the region of interest. Even small metal pieces can generate extensive artifacts that degrade the overall image quality. For example, if a small metallic object is in a wig during a head scan, the resulting streaks can block the view of the brain or sinus structures.
Identifying Problematic Wig Components
The most common culprits for generating CT artifacts in wigs are the metallic fasteners used for secure placement. These include small wig clips, sometimes called snap combs, which are typically made of steel and are sewn into the wig cap. Bobby pins or metal hairpins used to secure the wig to the natural hair underneath must also be removed before the scan. Many wigs also contain metal components within their adjustable straps or along the perimeter of the cap for structure and fit.
Even non-obvious materials can cause issues due to their density. Some synthetic wigs or hairpieces may contain dense fibers or metallic dyes that can still absorb enough radiation to create a visible artifact. The closer the metallic component is to the center of the scanning area, the more pronounced and disruptive the streaking artifact will be. Therefore, any metal piece in a wig intended for a head or neck CT scan must be removed to ensure a clean, readable image.
Preparation Steps Before Your Scan
The most effective preparation is to communicate with the CT technician before the procedure begins. Inform the technologist that you are wearing a wig or hairpiece so they can provide specific instructions based on the type of scan you are receiving. If your scan involves the head, neck, or upper chest, you will almost certainly be asked to remove the wig to prevent image compromise.
The facility staff can provide a safe and private location for you to remove and store the hairpiece during the brief scanning time. If you are concerned about your appearance without the wig, you may be able to wear a simple, non-metallic head covering, such as a plain cotton scarf or knit hat. This covering must have no metal zippers, snaps, or decorative elements. By removing potential sources of metal, you help ensure that the acquired CT images are clear, allowing for the most accurate diagnostic assessment.