Facebook Pixel Code
x
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Paraphrasing for all the answering of tutorial question Essay Example

Show related essays

Paraphrasing for all the answering of tutorial question

This is a preview of the 9-page document
Read full text

From here it goes through another amplifier and enters the receiver unit to be translated into a lower baseband frequency. It is then filtered and digitized to become part of the central computer’s memory.Since the construction of magnets is prone to human error and can’t be absolutely perfect, a minor deviation of coil positioning or permanent magnet faces is enough to generate impurities which have to remove by shimming. For example, when magnets are energized, the impact of the internal forces can create impurities in the magnetic field which then have to be removed by passive or superconducting shimming processes. In a 3T MRI system that has just been passively shimmed, the variation of the resonance frequency of a small spherical sample filled with water varies from 150 Hz to 300 Hz over the surface of a sphere of diameter 45cm. What is this variation in parts per million (ppm)? Is such a variation reasonable? As the magnetic field in which a superconducting wire resides reduces, does its consequent current carrying capability increases or deceases? What would happen if the temperature is reduced simultaneously? What is the optimal separation for 2 current carrying circular loops of radius 20cm and each carrying 20amps, to ensure that the total magnetic field produced in a region enclosed by the two coils is as uniform as possible?•     the torques and forces, as well as acoustic output and vibration should be minimal. Also, their interaction with the patient should be as low as possible to avoid peripheral nerve stimulation. In designing a gradient coil system, how would you maximize the switching speed of the system, while minimizing the interference with other components in an MR system? Which of the other components in an MR system are particularly important in this regard?         Active shielding helps to maximize the switching speed while minimizing interference. Also, the cold structure in the magnet is important to control the flux leakage of eddy currents which can occur. What is the optimal separation of two current-carrying loops to produce as linear a magnetic field gradient as is possible at the centre of the 2 loops? Why is this separation different to that necessary to produce a homogenous field?         The optimal separation involves root 3 multiplied by the radius with the currents running in opposite directions.  This acts

This is a preview of the 9-page document
Open full text
Close ✕
Tracy Smith Editor&Proofreader
Expert in: Physics, Environmental Studies, Formal science & Physical science
Hire an Editor
Matt Hamilton Writer
Expert in: Physics, Chemistry, Geography
Hire a Writer
preview essay on Paraphrasing for all the answering of tutorial question
  • Pages: 9 (2250 words)
  • Document Type: Essay
  • Subject: Physics
  • Level: Undergraduate
WE CAN HELP TO FIND AN ESSAYDidn't find an essay?

Please type your essay title, choose your document type, enter your email and we send you essay samples

Contact Us