Portable inexpensive ultrasound for Indian villages : "InNovaSound is the first complete Ultrasound imaging system built into a USB-compatible probe. The system uses B-mode imaging and weighs just 7.5 ounces. This breakthrough in analog to digital miniaturizations allows all of the electronics to be built in to the probe. The probe then sends this data to PC for display and processing. The software provides integrated training video clips and guides clinicians to ultrasound controls or the specific scan protocol."
What this means is that even a laptop can now be used for ultrasound scanning !