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DMSA Scan

Overview

A DMSA (dimercaptosuccinic acid) scan is a specialised nuclear imaging test that provides detailed imaging of the structure and function of your kidneys. It is commonly used to evaluate kidney health, check for scars or abnormalities, and assess how well the kidneys are working.

Your doctor may recommend a DMSA scan for various conditions, such as:

  • Detect kidney scars from a urinary tract infection (UTI)
  • Identify congenital abnormalities in the kidneys (present from birth)
  • Assess individual kidney function
  • Monitor kidney damage due to certain conditions, such as reflux nephropathy
  • Evaluate your kidneys after trauma or surgery

The DMSA scan involves the following steps:

  • A small amount of a radioactive tracer (DMSA) is injected through a vein in your arm. The tracer is absorbed by the kidneys, allowing them to be seen clearly on the scan.
  • Imaging is performed after 2-4 hours while allowing the tracer to concentrate in your kidneys. You can eat and drink normally during this waiting period and should stay well-hydrated.
  • You will be asked to lie down, and a gamma camera will capture detailed images of your kidneys.

The actual imaging process typically takes 20–30 minutes. However, the total appointment may take longer due to the waiting period after the injection.

Most patients need little preparation, but it is important to follow your doctor’s advice:

  • Fasting: Not required prior to the scan.
  • Hydration: Drink plenty of water before and after the scan to help the tracer move through your body.
  • Medications: Inform your doctor about any medications you take, as some may affect the results.

  • The amount of radioactive tracer used is minimal and leaves your body within 24 hours.
  • Allergic reactions are extremely rare, but you should discuss any concerns or allergies with your healthcare provider before the scan.
  • The procedure is safe for most patients; however, always inform your doctor if you are pregnant or breastfeeding.

  • You can resume normal activities immediately after the scan.
  • Drink plenty of fluids for the next 24 hours after the scan to help your body eliminate the tracer more quickly.
  • Your doctor will discuss the results with you at a follow-up appointment and explain what the images reveal about your kidney health.

Disclaimer:

The information in this Health Library is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional with any questions about a medical condition or before starting any treatment. Use of this site and its content does not establish a doctor–patient relationship. In case of a medical emergency, call your local emergency number or visit the nearest emergency facility immediately.