1.   Dvorkin said he had evidence that the sect uses special helmets that emit ultrasound waves, as well as synthetic mats rigged with electrical wiring.

2.   The focus is so precise that doctors can control within six cells exactly where the ultrasound waves cause the desired effect.

3.   The quality of the image is especially poor for people with a lot of body fat, which tends to distort the ultrasound waves and weaken the echo.

4.   The spores heat up and expand the surrounding water, creating a pattern of ultrasound waves that are picked up by a microphone.

5.   There, it renders first the right and then the left chambers of the heart opaque to ultrasound waves, thus improving the definition of the ultrasound image.

6.   Those ultrasound waves, which are not harmful, are very low intensity.

7.   Ultrasound waves move through the heel and measure bone density.

8.   Unlike X-rays, though, ultrasound waves reflect off soft-tissue boundaries, allowing doctors to view internal organs.

9.   Similarly, the transducers act like a lens to focus heat from high-intensity ultrasound waves just on the tumor, leaving other breast tissue unharmed.