I have worked for H/P in the medical ultrasound division. How much has ultrasound changed since the 1980s, excluding the peripherals?

Ultrasound has evolved a lot since the 1980s as far as technology is concerned. The front ends have consolidated many circuit boards into a few, with more of the circuitry being digital. The transducers are now all broadband, being able to transmit and receive in multiple frequencies both fundamental and harmonic.

The biggest change is what we used to call scan converters, back in the day. They are now called back ends and are essentially PCs that perform most of the scan conversion via software. These computers typically run Windows (read: job security) and then the ultrasound application software on top of that.

The principles remain the same.

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