The common functional brain imaging modalities, including functional magnetic resonance imaging (fMRI) and positron emission tomography, have excellent depth penetration but do not provide good ...

Medical ultrasound is a non-invasive method for imaging the body’s internal structures like organs. It processes by transmitting high-frequency sound waves into the body and measuring the reflections ...

We have all heard the change in pitch when an ambulance or police car drives by with its siren blaring. The pitch is higher as the vehicle comes toward you, and shifts to a lower pitch as it goes away ...