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.
Pulsed (gated) and spectral Doppler Pulsed Doppler ultrasound is a technique for measuring the velocity of blood in a small sample volume (Figure 1). Shown in Figure 2 is the spectral Doppler measurement of blood flow in the common carotid artery.he location of the Doppler sample volume is illustrated by a cursor overlaid on the B-mode image shown as Figure 1. To provide a localised velocity measurement, the instrument transmits a pulse that is 6 wavelengths to 40 wavelengths long-depending on the desired length of the sample volume.