Derive an equation for the relationship between electric field in a homogeneous volume of tissue and specific absorption rate (SAR) of radiofrequency power. Assuming a conductivity of the tissue of 1S/m, what electric field corresponds to an SAR of 1W/kg?
Continuous wave ultrasonic flow meter, transmitter and receiver side by side
A continuous wave ultrasonic flow meter has a transmitted and receiver side by side with an effective angle between them of 0o . The probe axis makes an angle θ with the blood vessel being insonated. The blood flow is towards the probe, though not along the axis of the probe. • Derive from the first principles the comple ...continues
Radiological Physics Questions
1. Dennis Chapman did not eat for a few days and went to a restaurant which says buffet all you can eat just $4.95. Dennis was so happy that he started eating and eating till the owner of the restaurant asked Dennis “May I help you sir?”. Dennis said yes, just go away and let me eat. After eating Dennis weight from 185 lb becam ...continues
Can someone explain what is the wave length for extremely low frequency radiation (ELF) and television waves. Please show how to work them out. thanks
Determine the activity (in Bq) of the radioactive material.
A device used in radiation therapy for cancer contains 2.2 g of cobalt-60 (59.933 819 u). The half-life of this isotope is 5.27 yr. Determine the activity (in Bq) of the radioactive material. Number :-___________________ Units:____________________
Einstein A and B coefficients and the application to lasers
Please see the attached file for full problem statement. Could you please do the problem that I have attached and explain (or give a link to such explanation) how you arrived at the solution? Thank you.
Lasers, probability of laser transition, lasing at high frequencies
Compare the number of spontanious and stimulated emissions. Give a simple illustration. Why LASER action is not possible at igh Frequencies?
