Hart is located in southeastern Castro County at 34Â°23â²12â³N 102Â°6â²54â³W / 34.38667Â°N 102.11500Â°W / 34.38667; -102.11500 (34.386723, -102.115035), along Texas State Highway 194. Dimmitt, the county seat, is 16 miles (26 km) to the northwest, and Plainview is 28 miles (45 km) to the southeast.
An intracranial neurovascular exam is also known as a Transcranial Doppler (TCD) study. TCD is a non-invasive, painless ultrasound technique that uses high-frequency sound waves to measure the rate and direction of blood flow inside vessels.CD is a non-invasive, painless ultrasound technique that uses high-frequency sound waves to measure the rate and direction of blood flow inside vessels.
Print. Transcranial Doppler ultrasound evaluates blood circulation in the brain. A device called a transducer is passed lightly across different areas of your head, directing high-frequency sound waves (ultrasound) at particular cerebral arteries.esults of Transcranial Doppler Ultrasound. 1  A radiologist reviews the recorded images and other test data for evidence of any abnormality. 2  High blood flow velocity suggests that blood flow is too turbulent or that the blood vessel is too narrow.