Ultrasonography, Doppler, Transcranial

**Definition:** A non-invasive technique using ultrasound for the measurement of cerebrovascular hemodynamics, particularly cerebral blood flow velocity and cerebral collateral flow. With a high-intensity, low-frequency pulse probe, the intracranial arteries may be studied transtemporally, transorbitally, or from below the foramen magnum.

**Tree numbers:** - E01.370.350.578.937.260.850 - E01.370.350.700.560.260.850 - E01.370.350.850.260.850 - E01.370.350.850.850.870 - E01.370.376.537.750.260.850 - E05.629.937.260.850

**Synonyms:** - Transcranial Doppler Sonography - Sonography, Doppler Transcranial - Transcranial Sonography, Doppler - Doppler Sonography, Transcranial - Sonography, Transcranial Doppler - Doppler Transcranial Sonography - Transcranial Doppler Ultrasonography - Transcranial Ultrasonography, Doppler - Ultrasonography, Doppler Transcranial - Doppler Transcranial Ultrasonography - Ultrasonography, Transcranial Doppler - Doppler Ultrasonography, Transcranial