Questions and Answers
What is the function of the Main magnet in an MRI system?
To generate static magnetic field
Why is the Radio-frequency (RF) coil important in an MRI system?
To produce radiofrequency waves that penetrate the body
What is the role of the Computer system in an MRI setup?
To detect RF signals emitted by the patient's body and feed this information into the computer system
Why do static magnetic fields used in MRIs have a frequency of 0 Hz?
Signup and view all the answers
What is the main difference between Earth's magnetic field and an MRI magnet's field?
Signup and view all the answers
Why should pregnant patients not be exposed to an MRI machine > 2.5 T?
Signup and view all the answers
What is the function of the gradient magnetic field in an MRI machine?
Signup and view all the answers
What distinguishes a superconductive magnet from a permanent magnet in an MRI machine?
Signup and view all the answers
Why have permanent magnets with a horizontal field been considered innovative?
Signup and view all the answers
Which disadvantage is associated with permanent magnets in MRI machines?
Signup and view all the answers
What is a significant advantage of resistive electromagnets compared to other types of electromagnets?
Signup and view all the answers
Why are resistive electromagnets preferred when capital costs are a major concern?
Signup and view all the answers
What is a key disadvantage of resistive electromagnets that limits their application in some contexts?
Signup and view all the answers
