How much do we really need to know about this T1 and T2 business... Jacaranda goes into quite some detail, and looking through notes of past students, they barely touch the finer details of T1 and T2 weighting.. can anyone enlighten me?
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T1 and T2 weighted (MRI)? (1 Viewer)
- Thread starter tempco
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za
Member
nah mate i cant.
just learn it, its not that difficult
just learn it, its not that difficult
snoopwogg
Member
Eh, there isnt a specific dotpoint for it is there? haha yeah kheir hope they ask details about PET or x-rays and theres a 8 mark effects on society question! 
snoopwogg
Member
Your ANUS... dont forget, life is given as a trust. And it costs 18c per hour to run a television.
This is all you have to know, according to Charles Sturt notes:
- ‘Relaxation’ is the name of the processes whereby the nuclei return to random, out of phase, precession. There are two relaxation processes, termed T1 and T2.
- Spin-lattice relaxation, T1, happens as the nuclei transfer energy quanta to the nearby molecular lattice.
- Spin-spin relaxation, T2, happens as nuclei transfer energy quanta between each other.
- In biological tissues only spins in the ‘free water pool’ contribute to the measurable MR signal whereas spins in ‘bound water’ do not.
- ‘Relaxation’ is the name of the processes whereby the nuclei return to random, out of phase, precession. There are two relaxation processes, termed T1 and T2.
- Spin-lattice relaxation, T1, happens as the nuclei transfer energy quanta to the nearby molecular lattice.
- Spin-spin relaxation, T2, happens as nuclei transfer energy quanta between each other.
- In biological tissues only spins in the ‘free water pool’ contribute to the measurable MR signal whereas spins in ‘bound water’ do not.
snoopwogg
Member
Thanks for clearing that up ashtor
snoopwogg
Member
nekkid said:
What has giving off energy to the nearby "molecular lattice" got to do with the measure of MR and how and what the hell is it :S i have a headache. Isnt MRI the detection of the energy givin off by the neucleons when they relax? So why do we need to know where the energy goes? And also, if the energy is given to the molecular lattice, by that im assuming nearby tissues, wouldnt it affect cellular processes? I dont get it and i manage to do well witout knowing it lol. HELP
snoopwogg
Member
Listen here ashtor, u know what precession frequency is. U probably know more than what i and nekkid know put together, seeing as you topped our grade. Maybe you can enlighten us?
ashtor
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obviously i know what precession frequency is, but this water pool balloot energy transfer watever the hell yousre talkin about i got no idea mate...can sum1 who knows what theyre talkin about now please answer (ie, not za, kheir, snoopwogg, nekkid, wahashtini, mr eazi or ontherun)
snoopwogg
Member
....yeah! thatd be a good idea. But if the guy who topped all teh subjects he attempted this year doesnt know... who does? :worried:
snoopwogg
Member
Tha cheery weird doood that always comes up with the weird facts and knows something about everything. The one who sits next to me in class.. the one they call ELIAS... did u know ultrasound can be used as a vibrator? He told me that
wahashtini
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lek ayreez ur all arguing but wtf is the question??? (have i enlightened u with my words of wisdom.. thanku, dont mention it.)
OMG o_____________Osnoopwogg said:Tha cheery weird doood that always comes up with the weird facts and knows something about everything. The one who sits next to me in class.. the one they call ELIAS... did u know ultrasound can be used as a vibrator? He told me that
ok cool.
mr EaZy
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lek u didnt know who i was!
And Guys how many times do i have to tell u to keep my name clear of these threads!
And Guys how many times do i have to tell u to keep my name clear of these threads!