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Can the focal depth be lengthened by decreasing the transducer’s diameter?
Can the focal depth be lengthened by increasing the transducer’s diameter?
Can the focal depth be lengthened by increasing the resonant frequency?
Can the focal depth be lengthened by increasing the wavelength?
Huygen’s Principle explains why a sound beam has an hourglass shape.
Increasing the transducer frequency and diameter will decrease the focal depth.
The best spatial resolution is found in the Fresnel zone.
Choosing a transducer with a higher frequency will shorten the focal length.
The sound beam’s diameter is narrowest at the focus.
A 10 MHz, 6mm diameter transducer will have a longer near zone length than a 7 MHz, 5 mm diameter transducer.
The focal depth of a 6 MHz, 3 mm diameter transducer is 9 mm.
The spinal pulse length is the distance from the face of the transducer to the point of maximum intensity.