High-intensity focused ultrasound (HIFU) is one treatment for certain types of cancer. During the procedure, a narrow be

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High Intensity Focused Ultrasound Hifu Is One Treatment For Certain Types Of Cancer During The Procedure A Narrow Be 1 (37.27 KiB) Viewed 33 times

High-intensity focused ultrasound (HIFU) is one treatment for certain types of cancer. During the procedure, a narrow beam of high-intensity ultrasound is focused on the tumor, raising its temperature to nearly 90°C and killing it. A range of frequencies and intensities can be used, but in one treatment a beam of frequency 3.20 MHz produced an intensity of 1650.0 W/cm². The energy was delivered in short pulses for a total time of 3.50 s over an area measuring 1.50 mm by 5.40 mm. The speed of sound in the soft tissue was 1540 m/s, and the density of that tissue was 1517.0 kg/m³ What was the wavelength of the ultrasound beam? How much energy Etotal was delivered to the tissue during the 3.50 s treatment? What was the maximum displacement A of the molecules in the tissue as the beam passed through? λ = Etotal = A = m m