04 relajacion transversal
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Transcript of 04 relajacion transversal
![Page 1: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/1.jpg)
THOME
PHYSICAL PRINCIPLES
Signal Generation
![Page 2: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/2.jpg)
THOME
nuclei, protons and spins
longitudinal relaxation T1
transverse relaxation T2
exitation and relaxation
relation between T1 and T2
signal generation
![Page 3: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/3.jpg)
THOME
transverse relaxation T2
Spin - Spin relaxation
signal generation
![Page 4: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/4.jpg)
THOME
X
Y
ZBo
signal generationtransverse relaxation T2
![Page 5: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/5.jpg)
THOME
X
ZBo
signal generationtransverse relaxation T2
Y
![Page 6: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/6.jpg)
THOME
X
Y
ZBo
signal generationtransverse relaxation T2
![Page 7: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/7.jpg)
THOME
X
Y
ZBo
signal generationtransverse relaxation T2
![Page 8: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/8.jpg)
THOME
X
Y
ZBo
signal generationtransverse relaxation T2
![Page 9: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/9.jpg)
THOME
X
Y
ZBo
signal generationtransverse relaxation T2
![Page 10: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/10.jpg)
THOME
X
Y
ZBo
signal generationtransverse relaxation T2
![Page 11: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/11.jpg)
THOME
X
Y
ZBo
signal generationtransverse relaxation T2
![Page 12: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/12.jpg)
THOME
X
Y
ZBo
signal generationtransverse relaxation T2
![Page 13: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/13.jpg)
THOME
X
Y
ZBo
signal generationtransverse relaxation T2
![Page 14: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/14.jpg)
THOME
X
Y
ZBo
signal generationtransverse relaxation T2
![Page 15: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/15.jpg)
THOME
X
Y
ZBo
Signal
signal generationtransverse relaxation T2
![Page 16: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/16.jpg)
THOME
X
Y
ZBo
Signal
signal generationtransverse relaxation T2
![Page 17: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/17.jpg)
THOME
X
Y
ZBo
Signal
signal generationtransverse relaxation T2
![Page 18: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/18.jpg)
THOME
X
Y
ZBo
Signal
signal generationtransverse relaxation T2
![Page 19: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/19.jpg)
THOME
X
Y
ZBo
Signal
dephasing
signal generationtransverse relaxation T2
![Page 20: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/20.jpg)
THOME
S
time
Free Induction Decay signal
FID
T2
signal generationtransverse relaxation T2
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THOME
T2
S
T2
63%
definition T2:
the time that passes untill 63% of the original signal has been lost
time
signal generationtransverse relaxation T2
![Page 22: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/22.jpg)
THOME
T2
S
T2*
time
signal generationtransverse relaxation T2*
Due to magnetic inhomegeneities the transverse relaxation is lost faster !! T2 T2*
![Page 23: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/23.jpg)
THOME
X
Y
ZBo
signal generationtransverse relaxation T2
![Page 24: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/24.jpg)
THOME
X
Y
ZBo
transmitcoil
radiofrequencytransmitter
signal generationtransverse relaxation T2
![Page 25: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/25.jpg)
THOME
X
Y
ZBo
transmitcoil
radiofrequencytransmitter
180º
180º
signal generationtransverse relaxation T2
![Page 26: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/26.jpg)
THOME
X
Y
ZBo
180º
signal generationtransverse relaxation T2
![Page 27: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/27.jpg)
THOME
X
Y
ZBo
180º
signal generationtransverse relaxation T2
![Page 28: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/28.jpg)
THOME
X
Y
ZBo
180º
signal generationtransverse relaxation T2
![Page 29: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/29.jpg)
THOME
X
Y
ZBo
180º
signal generationtransverse relaxation T2
![Page 30: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/30.jpg)
THOME
X
Y
ZBo
180º
signal generationtransverse relaxation T2
![Page 31: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/31.jpg)
THOME
X
Y
ZBo
180º
signal generationtransverse relaxation T2
![Page 32: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/32.jpg)
THOME
X
Y
ZBo
180º
signal generationtransverse relaxation T2
![Page 33: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/33.jpg)
THOME
X
Y
ZBo
180º
signal generationtransverse relaxation T2
![Page 34: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/34.jpg)
THOME
X
Y
ZBo
180º
signal generationtransverse relaxation T2
![Page 35: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/35.jpg)
THOME
X
Y
ZBo
180º
signal generationtransverse relaxation T2
![Page 36: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/36.jpg)
THOME
180º
refocusing pulse
signal generationtransverse relaxation T2
![Page 37: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/37.jpg)
THOME
180º 180º
refocusing pulse
signal generationtransverse relaxation T2
![Page 38: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/38.jpg)
THOME
T2 envelope
signal generationtransverse relaxation T2
![Page 39: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/39.jpg)
THOME
in conclusion:
• T1 relates to magnetisation
• T2 relates to signal
signal generation
![Page 40: 04 relajacion transversal](https://reader035.fdocument.pub/reader035/viewer/2022081514/54577536af795900058b866d/html5/thumbnails/40.jpg)
THOME
nuclei, protons and spins
longitudinal relaxation T1
transverse relaxation T2
excitation and relaxation
relation between T1 and T2
signal generation