A modern medical ultrasound machine has a typical F-number of 0.5.

But these centers may use the ultrasound machine at a higher energy level and for longer times than is safe.

The ultrasound machines that make intravascular images sell for $75,000 to $100,000.

But, he said, "The preliminary report is that the ultrasound machine did not survive the drop."

Focus on the Family said that about 425 centers might already have ultrasound machines.

Such clinics began to acquire ultrasound machines more than five years ago, operators said.

In June 1983, an ultrasound machine was added to Memorial's services.

Cables from the back of the probe are connected to an ultrasound machine.

They are not subject to regulation, and anyone with an ultrasound machine - the best cost upwards of $150,000 - can open up shop.