Synthetic Aperture Focusing Technique in High–Frequency Ultrasound Imaging to Locate Layer Delamination
Sprache des Vortragstitels:
Englisch
Original Kurzfassung:
In this proposed paper the synthetic aperture focusing technique
(SAFT) is applied to extend the depth of focus for spherically
focused ultrasound transducers. This technique uses a virtual source
element in the geometrical focus of the transducer. Initial experiments
with a 50 μm copper wire are conducted to investigate the efficacy of
SAFT–processing for positive and negative defocus. Furthermore delamination
of an adhesive join is tested. Compared to the common B–
mode ultrasonic imaging which can only detect the presence of layer
delamination the proposed SAFT can accurately locate the position of
the delamination.
Forschungs-