This is one of the most widely performed Nuclear Medicine tests. The principle of the test is visualisation of living bone, or more accurately, visualisation of the living molecules that make up bone tissue. This test is extraordinarily sensitive in detecting any abnormality within living bone. It is far more sensitive that x-ray, CT or even MRI in the detection of fractures and is the most sensitive means of detecting malignant tumour in bone. The entire skeleton can be surveyed easily and rapidly with modern Nuclear Medicine equipment. This test is also extremely useful for assessment of bone and joint pain following sporting activities or in the many forms of arthritis. It also has an important role in detecting infection in bones and joints.