The current heavy hitter in the ultrasound industry is Zonare and the Zonare Technology page (<a href="http:&#x2F;&#x2F;www.zonare.com&#x2F;technology&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.zonare.com&#x2F;technology&#x2F;</a>) indicates that they are providing state of the art ultrasound that is much faster and higher resolution than earlier systems by combining variable sets of observations.  This indicates that the technology that is currently being purchased and used is substantially more complex than a mere sensor.<p>Additionally medical markets have very complex purchasing processes and criteria that require specific marketing strategies to market.  Most startups are used to going for cheap or fast or both, but medical markets want good and are not nearly as sensitive to price or delivery time.  To sell to medical markets it is necessary to convince medical equipment purchasers that an option is better and less risky than other possibilities.<p>Overall this thread is a shameful display of the shallowness and shortsightedness of startup engineering today.  The answers to most of the questions raised here can be answered by the technology page of the dominant supplier, but no one bothered to look up any of that.  Instead we get irrelevant broken foot anecdotes.  Conversationally that may make sense, but realistically making the kind of ultrasound machine offering that doctors might want to use and be able to buy is a very different and more complicated problem than is suggested by most of this thread.