Results from an experiment where blocks of foam ( 2 cm thick) at different densities are scanned ultrasonically and the change in Sonic Contrast of the lower reference block is used to compare the different contrast reduction. Sonic contrast is as distance from the main lobe to side lobes expressed in dB. No changes to the … More Change in foam density & contrast reduction.
Introduction I would like to set out a plan for how the material unfolds in this presentation and covers the following points: 1..What purpose is served by measuring voids 2..An Anomaly found during survey work. 3..How can we best perceive this anomaly? 4..What could have caused the anomaly? 5..Could such an anomaly be missed? 6..What … More US transducer anomaly and contrast reduction
The following videos show the azmithal and elevational side-lobe profiles derived from the acquired 3D grey level images of a good and bad probe. A presentation follows which makes clear how use of such a beam shape could be used to determine clinical meaning to US QA. Good probe Bad probe Below is a presentation … More Filament Test Object
I hope the presentation below, given some time ago may be of use to people implementing Doppler QA in their department. Introduction Doppler measures the velocity of an object by determining the frequency-shift between the emitted and received signal. The sensitivity of the measurement depends on the amplitude of the Doppler-shifted signal received and how … More Influence of Beam Shape on Capillary Doppler Sensitivity
I recently attended a Social Enterprise event which tried to answer the question. The meeting was hosted by the NE Social Enterprise partnership, which was well attended by Council Officials and Union Representatives from around the North East. The slides from the meeting are linked below. spinouts-speakersslides(1) Happy to discuss with anyone the slide content. … More Sunderland Social Enterprise Event.”Can Social Enterprise Save Public Services?”
I am going to start this blog site with an early presentation provided by Herr Jaroslav Satrapa, in support of his test methods. His later work added new thinking but the essential idea of VDR holds firm. The presentation was given in Edinburgh at the Euroson meeting in 2001. Latest Advances in Quality Control for … More Latest Advances in Quality Control for Ultrasonic Pulse Echo
Medical physics is to many, a unknown world of physicists and scientists, analysing data and information before applying knowledge to reach rational conclusions to which we should all agree. It may be comforting to know that it does not have to end there. The physicists of MPCL have many years of experience and understanding, from … More Purpose of this blog