What is the difference in arrival times of the photons

Reference no: EM131302174

(a) Two annihilation γ rays in a PET scan originate at the same point and travel to detectors on either side of the patient. If the point of origin is 9.00 cm closer to one of the detectors, what is the difference in arrival times of the photons? (This could be used to give position information, but the time difference is small enough to make it difficult.)

(b) How accurately would you need to be able to measure arrival time differences to get a position resolution of 1.00 mm?

Reference no: EM131302174

Questions Cloud

How are you going to put what you have learned to use : How are you going to put what you have learned to use? How will you use this knowledge to motivate yourself and others? What actions will you take to create a work environment that is motivating?

Men and women nonverbal behavior : Consider men's and women's nonverbal behavior. Does the concept of display rules help you explain any differences between the sexes?

Prepare communications plan as per the template : As the project manager you are required to present an initial project report to the project sponsor that shows how you propose to implement this project. As the project manager you may make any assumptions you think are necessary.

Pays no dividends and ignore itnerest on margin loan : You purchased 200 shares of ABC common stock on margin at 50$ per share. Assume the initial margin is 50% and the maintenance margin is 30%. You will get a margin call if the stock drops below ___. (assume the stock pays no dividends and ignore itner..

What is the difference in arrival times of the photons : How accurately would you need to be able to measure arrival time differences to get a position resolution of 1.00 mm?

Value of k needed for normalizing jakes doppler spectrum : Find the value of K needed for normalizing the Jakes doppler spectrum.- Find the area under the Ricean doppler spectrum defined by (14.61).

The bank be worth under the conditions : What will a deposit of $3,500 left in the bank be worth under the following conditions? Left for nine years at 7% interest.

Project manager point of view : After watching the video, from a project manager point of view, discuss the importance of knowing the scope of the project, the scenario of the project, in this case an expedition on extreme weather conditions

Explain the impact of environmental uncertainty : Explain impact of environmental uncertainty on the strategic management process. Give an example from one of your cases or your Capsim company that show how environmental uncertainty impacted the strategic management process.

User Account

All Pages