- Blockages to blood flow (such as clots).
- Narrowing of vessels (which may be caused by plaque).
- Tumors and congenital malformation.
Ultrasound imaging, also called ultrasound scanning or Sonography, is a method of obtaining images from inside the human body through the use of high-frequency sound waves. Obstetric ultrasound refers to the specialized use of sound waves to visualize and thus determine the condition of a pregnant woman and her embryo or fetus.
Doppler ultrasound is a special technique used to examine blood flow. Doppler images can help the physician to see and evaluate: