Before a medical emergency, such as a pulmonary embolism occurs, if you suspect you have a blood clot in your leg, speak to your doctor.
One of the first tests might involve a venous ultrasound, said the experts at RadiologyInfo.
Sound waves are used to create an image of your veins in the leg, for example.
If the results of the ultrasound are inconclusive, a venography or MR angiography may be used.