Which radioisotope is used to detect blood clot in your body?

Technetium-99m (Tc-99m) is commonly used as a radioisotope to detect blood clots in the body. It is often used in a procedure called a venous scan or a lung scan, where it helps visualize blood flow and identify blockages or clots in the veins or lungs. The radioisotope emits gamma rays, which can be detected by a gamma camera, allowing for imaging of the affected areas.