A few years ago, a 12 year old girl was admitted to a hospital for heart murmurs. A defective ultrasound transducer was used and they could not detect why the murmurs occurred. Repeating this procedure (nearly 2 years later) with a different machine showed dramatically different results.
This prompted a study in which 32 hospitals were censused for the efficacy of their ultrasound units. 39.8% of transducers were found defective.
Sonographers cannot tell when a transducer is defective intuitively, it just makes the picture worse. Oftentimes they will compensate by turning up the power to get a more clear image. Ob-Gyn ultrasound suffers the same problem, and this will expose our children to unnecessarily high intensities.
Watch the video to learn more –