Washington: Indian researchers have developed a total cholesterol test that uses a digital camera to take a snapshot of the back of the patient`s hand rather than a blood sample.The image obtained is then cropped and compared with images in a database for known cholesterol levels.N.R. Shanker of the Sree Sastha Institute of Engineering and Technology and colleagues have described how they have developed a non-invasive way to test cholesterol levels in patients at increased risk of heart disease.Their approach is based on the creation of a large database of cholesterol levels recorded using standard blood tests and linked to a standardized photograph of the hand for each patient; cholesterol is concentrated in the creases of one`s fingers.They developed an image-processing computer program that compares the image from a new patient with the thousands of entries in the database and matches it to a specific cholesterol reading.Measuring the amount and type of cholesterol circulating in the blood is an important risk factor in cardiovascular disease.
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