Physical Principles Ultrasound generates positive and negative (sinusoidal) pressures.
{"Image DocumentName": "Physical PrinciplesUltrasound generates positive and negative (sinusoidal) pressures.", "Image ImageDescription": "Microbubbles undergo compression at peak of ultrasound wave and expansion at nadir. Bubble radius may change by a factor of 20 or more. Sound is generated with this movement, and amplified in combination of movement of thousands of microbubbles. Contrast bubbles oscillating in an ultrasound field are vastly more effective than RBCs at scattering sounds, resulting in improved blood pool signal. This generated signal can be distinguished from that of other tissue, resulting in improved imaging capabilities.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}