Ever Wonder How MRI Machines Create Such Detailed Images?
Here’s a detailed breakdown of the key concepts of MRI :
Active Nucleus in MRI:
What is it? Certain atomic nuclei, like hydrogen, are naturally magnetic and react in a magnetic field.
Why it matters? These nuclei are what MRI scanners detect and use to create images.
Magnetic Field and Spin:
What is it? Nuclei have a property called spin, and when placed in a magnetic field, they align in a certain way.
Why it matters? The alignment of these spins is crucial for creating MRI signals.
Resonance Frequency:
What is it? This is the specific frequency at which nuclei absorb and emit energy.
Why it matters? This frequency, called the Larmor frequency, is used to excite the nuclei during an MRI scan.
RF Pulses and Excitation:
What is it? Radiofrequency (RF) pulses are used to disturb the alignment of the spins.
Why it matters? This disturbance is necessary to produce signals that the MRI can detect.
Signal Generation:
What is it? After the RF pulse, nuclei return to their original state, releasing energy in the process.
Why it matters? The released energy is captured by the MRI machine to create an image.
T1 and T2 Relaxation:
What is it? T1 is the time it takes for nuclei to return to alignment with the magnetic field. T2 is the time it takes for spins to lose phase coherence.
Why it matters? These times affect the contrast and quality of MRI images.
Image Formation:
What is it? MRI machines use the signals from the nuclei to construct detailed images of the inside of the body.
Why it matters? This process allows to see inside the body without surgery.
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Want to Learn More?
If you want to go in detail of the basics of MRI, then check the slides given below on this topic.I also offer remote tutoring sessions where I can explain everything in detail and answer your questions. Whether you’re a student or a professional, I can help you understand MRI physics better.
Contact me to schedule a session and take your MRI knowledge to the next level!
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