Ultrasound Physics - Angle Correction for Doppler

Audience: Radiology Residents

Learning Objectives:
Describe the physics of ultrasound Doppler imaging
Identify and describe the impact of angle correction

Summary:
The change in frequency is proportional to the velocity of the moving object
Angle correction is with respect to the flow within the gate
The ideal angle of insonation is less than 60
Over correction → Over estimates velocity
Under correction → Under estimates velocity

References:
Hertzberg, Barbara S., and William D. Middleton. Ultrasound: the requisites. Elsevier Health Sciences, 2015.
Hangiandreou, Nicholas J. "AAPM/RSNA physics tutorial for residents: topics in US: B-mode US: basic concepts and new technology." Radiographics 23.4 (2003): 1019-1033.
Boote, Evan J. "AAPM/RSNA physics tutorial for residents: topics in US: Doppler US techniques: concepts of blood flow detection and flow dynamics." Radiographics 23.5 (2003): 1315-1327.

Видео Ultrasound Physics - Angle Correction for Doppler канала Radiology Education by Joseph W. Owen, MD