Is a nuclear medicine scan painful? And what can I expect during the procedure?

In general, a nuclear medicine scan (or nuclear imaging) is not a painful procedure. The examination does not involve any surgery, and the only minor discomfort a patient might feel is the needle prick when the radiopharmaceutical (radioactive tracer) is injected into a vein [1]. Once this step is complete, the pain subsides, and the patient does not feel any abnormal sensations from the radioactive material itself as it travels through the body.

The Nature of the Nuclear Scan Experience

The examination relies on capturing precise images of internal organ functions rather than just their external shape. During the procedure, you will be asked to be in a specific position (lying down or sitting) for a period that may range from minutes to hours, depending on the type of scan and the target organ [1]. A primary requirement for the success of this scan is to remain completely still while the cameras (such as a gamma camera or SPECT and PET imaging devices) are working to avoid image blur [2]. Some patients may feel some muscular discomfort due to the need to remain still for a long time, but this discomfort is unrelated to pain caused by radiation [3]. If you would like a deeper understanding of how this technique works in different medical contexts, you can review our article on Nuclear Scan: How It Works, Uses, and What to Expect? (Arabic).

Preparations and Readiness Before the Scan

Preparations vary based on the type of scan, but there are general steps aimed at ensuring accurate results and patient safety. You will often be asked to remove any metal or jewelry that might interfere with image quality [1]. In special cases, such as a bone scan, you may be asked to avoid taking medications containing bismuth (such as certain known stomach medications) for 4 days before the scan to avoid affecting the results [3]. You must also immediately inform the medical team if you are pregnant or suspect you might be pregnant, or if you are breastfeeding, as the scan may be postponed or specific advice may be provided regarding handling the radioactive material [3].

What Happens After the Scan Ends?

As soon as the examination is finished, most patients can return to their normal lives immediately [1]. It is usually recommended to drink plenty of fluids after the procedure to help stimulate the body to eliminate the radioactive material and cleanse the bladder. The radioactive material disappears from the body automatically within a period ranging from two to three days [3]. The radiologist will analyze the images and provide the results to your doctor, who will discuss them with you based on your medical history and the symptoms that prompted the examination [1].

Safety and Risks

The radiation levels used in most nuclear medicine scans are safe and very limited; in most cases, the radiation dose does not exceed that which a patient is exposed to during traditional X-rays or computed tomography (CT) scans [2]. Although risks related to the radioactive material are very rare, in exceptional and minor cases, they may include allergic reactions, skin rash, or slight swelling at the injection site [3]. The diagnostic benefits of this procedure, which include early detection of diseases and monitoring tissue response to treatment, remain significantly greater than the potential radiation risks [2].

Medical references

• Nuclear Scans
• Nuclear Medicine
• Bone scan