rd - 1962 - ENC Conference
rd - 1962 - ENC Conference
rd - 1962 - ENC Conference
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THE SPIN-ECHO SEQU<strong>ENC</strong>F<br />
3.<br />
M~<br />
il<br />
Y<br />
/ \\<br />
0 1 2<br />
90 ° Pulse<br />
180 =' Pulse Echo<br />
Figure 4 - Simplified Illustration of the Echo Sequence<br />
MEASUREMENT<br />
SINGLE<br />
~0 °<br />
i'---to<br />
ECHO SEQU<strong>ENC</strong>E<br />
(2) CARR- PURCELL SEQU<strong>ENC</strong>E<br />
180a 2 ~._ 5~<br />
• --t ¢: S e.x -f t T "tH U.& /<br />
2<br />
4.<br />
~-'=: ~ "- o Pl-%- I"-T'fnT " f<br />
1- t s Time<br />
Echo<br />
90 ° 180 ° 180 ° 180 °<br />
_ I_ 2"E-I-~ Time<br />
Figure 5 - Single and Multiple Echo Sequences Used in the<br />
Measurement of T 2<br />
Y<br />
0<br />
X
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