MRI synchronization with the IRF90

In summary, the speaker is seeking an explanation for the lack of synchronization in the precession of protons after an RF90 impulse compared to an IRF180 pulse. They question the origin of this resonance and thank anyone who can provide an explanation.
  • #1
Bayoudh101
12
0
Hello ,

In MRI physics , I don't seem to be able to wrap my head around the synchronization in the precession of the protons after an RF90 impulse (which is an electromagnetic impulse that would deviate the precessing magnetic field axe by 90 degrees) the synchronization would give the vector length on the XY plane and that's logical , but why doesn't synchronization happen with the IRF180 pulse ? Which only seems to flip the vector ? Can someone please explain the origin of this resonance ?

Thank you .
 
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  • #2
Bayoudh101 said:
the synchronization would give the vector length on the XY plane and that's logical , but why doesn't synchronization happen with the IRF180 pulse ? Which only seems to flip the vector ?
If you start with a vector aligned along the z axis and you rotate it by 180 deg, then how much of the vector is in the xy plane?
 

1. What is MRI synchronization with the IRF90?

MRI synchronization with the IRF90 is a process that involves synchronizing the timing of an MRI scan with the timing of a physiological signal, such as a heartbeat or respiration rate. This allows for more accurate and precise imaging of the desired area.

2. How does MRI synchronization with the IRF90 work?

MRI synchronization with the IRF90 works by using a device called an IRF90 (or similar device) to record and monitor a physiological signal while the MRI is scanning. The MRI scanner then uses this information to trigger the scan at the appropriate time, ensuring that the image is captured during a specific phase of the physiological signal.

3. Why is MRI synchronization with the IRF90 important?

MRI synchronization with the IRF90 is important because it allows for more accurate and precise imaging of the desired area. This is especially important for studies that involve physiological changes, such as cardiac or respiratory imaging, where timing is crucial for obtaining high-quality images.

4. What are the benefits of using MRI synchronization with the IRF90?

The benefits of using MRI synchronization with the IRF90 include improved image quality, reduced motion artifacts, and increased accuracy of data analysis. It also allows for more efficient use of scanning time, as the scan can be triggered to occur only during specific phases of the physiological signal.

5. Are there any limitations to MRI synchronization with the IRF90?

One limitation of MRI synchronization with the IRF90 is that it requires the use of specialized equipment and software, which may not be available in all MRI facilities. Additionally, the synchronization may not be as accurate for certain types of physiological signals, such as irregular heartbeats. It is important for researchers to understand the limitations and potential sources of error when using this technique.

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