Words, the MRV is a type of medical imaging is to delineate the veins in the body can be used.

the veins are the paths of blood are that the blood from the organs of the body, you to the heart and oxygen from your lungs, returns, etc., so the blood with oxygen, and substances affect the impregnated and to the heart be returned.

maybe for you be interesting to know this type of imaging also with the same equipment, an MRI machine is done. An MRI machine is a device in the field working to the number that goes with the magnetic field works for this type of imaging used. This device is of particular technique and compelling for this type of imaging uses.