Carotid Intima-Media Thickness (CIMT) Test

Authored By: Dr. Leonard Leng
Last updated: Jun 17, 2025

The CIMT test uses ultrasound technology to measure the thickness of the inner two layers (intima and media) of the carotid arteries. It helps detect early signs of atherosclerosis, a condition where arteries become narrower because of plaque buildup from fats, cholesterol, and other substances, which can block blood flow. CIMT is a non-invasive way to predict cardiovascular diseases like heart attacks and strokes, helping doctors intervene early. In 2022, cardiovascular diseases were a major health issue in Singapore, with about 23 deaths each day, making up 31.4% of all deaths in the country.

Source: Singapore Heart Foundation

Given that cardiovascular disease is a leading cause of death in Singapore, early detection allows preventive measures such as lifestyle modifications, medications, and other interventions that can reduce the risk of serious health complications and potentially save lives.

CIMT test is generally performed as follows:

• Preparation: The patient should remove all neck jewellery and obstructions and stand in a relaxed position.
• Application: A gel is applied to the neck area. This gel ensures good contact between the transducer and the skin, eliminating air pockets that could distort the ultrasound waves and affect image quality, ensuring clear and precise imaging.
• Ultrasound: The transducer is moved along the carotid artery. The technician carefully manoeuvres the probe to capture high-resolution images of the artery walls.
• Measurement: The thickness of the intima and media layers is measured from the ultrasound images. The measurements are typically taken at multiple points along the carotid artery to ensure accuracy.
• Analysis: The collected images and measurements are analysed by the doctor to assess the presence and extent of atherosclerosis.

An increased intima-media thickness indicates a higher risk of atherosclerosis. The doctor will review these results, consider the patient’s overall health, lifestyle, and risk factors, and determine the best course of action for preventing cardiovascular disease. Possible interventions can include lifestyle modifications such as dietary changes and increased physical activity, medications to manage cholesterol and blood pressure, and regular monitoring to track the progression of atherosclerosis.

CIMT is a non-invasive, safe, and quick procedure that specifically measures the thickness of the carotid artery walls, focusing on early detection of atherosclerosis. This differs from other cardiovascular tests, each with its unique purpose:

• Electrocardiogram (ECG): Measures the electrical activity of the heart to detect arrhythmias, heart attacks, and other cardiac conditions.
• CT Coronary Angiography (CTCA): Uses computed tomography (CT) scans to provide detailed images of the heart’s blood vessels, assessing for any blockages.
• CT Calcium Scoring: Uses computed tomography (CT) scans to detect the buildup of calcified plaque in the coronary arteries.
• Stress Tests: Evaluate heart function under physical stress, useful for detecting significant blockages and assessing overall cardiovascular fitness.

Each of these tests adds to CIMT by giving a more complete understanding of various parts of your heart and blood vessel health, as well as the risk for heart-related illnesses.

At ATA Medical, we offer various cardiovascular tests with the prices as follows:

You can do the CIMT test at any of our two conveniently located clinics:

• Tanjong Pagar Medical Clinic (Closest MRT: Tanjong Pagar EW15)
• Orchard Clinic (Closest MRT: Orchard Boulevard TE13)

The CIMT test is a valuable, non-invasive tool for early detection of atherosclerosis, essential in managing cardiovascular health. In Singapore, where cardiovascular disease is a leading cause of death, regular CIMT screenings can identify early artery narrowing, allowing for timely interventions. By complementing other cardiovascular tests, CIMT offers comprehensive insights into heart health, aiding in the prevention of serious cardiovascular complications and improving patient outcomes. If you are unsure if CIMT is suitable for you, schedule an appointment with our doctors to discuss more about your cardiovascular health.