Breadcrumb < Patient care Diagnostics Located in central London, Mayo Clinic Healthcare offers tailored care with state-of-the-art diagnostic tests on site that provide results quickly, usually on the same day. Abdominal ultrasound An abdominal ultrasound can help screen for or diagnose issues with internal organs, veins and other structures. Bone density test Bone density scans can help determine the presence of osteoporosis, a condition where bones become more fragile. Cardiac MRI Receive detailed images of your heart and blood vessels through this painless, noninvasive imaging test. Chest X-ray Chest X-rays are a non-invasive method to examine issues of your lungs, heart, airways, blood vessels and bones. Colonoscopy Colonoscopy is an effective tool to look for abnormalities and signs of cancer in the lower digestive tract. CT coronary angiogram We use the latest CT technology to reduce radiation exposure while producing detailed images of your heart and blood vessels. Echocardiogram An echocardiogram tailored to your specific needs may help with understanding issues with your heart valves or chambers. Electrocardiogram (ECG) ECG is a noninvasive, painless method to diagnose many common heart problems, such as arrhythmia. Transoesophageal echocardiogram (TOE) For more-detailed images of your heart, or if a standard echocardiogram fails to produce clear pictures, we offer a transoesophageal echocardiogram.