MRI sequence parameters
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Listed in the table below are the most common acquisition parameters for commonly used MRI pulse sequences (in msec). The specific parameters for any given study varies from one manufacturer to another, and from one imaging center to another.
SequenceTR(msec)TE(msec)Flip Angle(degrees)Inversion Time(msec)
- TR:<800
-
TE: <
;3090NA;30 - flip angle: 90 degrees
PD
- TR:>1000
-
TE: <
;3090NA;30 - flip angle: 90 degrees
- TR:>2000
-
TE: >
;8090NA;80 - flip angle: 90 degrees
FSE T2
- TR:>2000
-
TE: >
;6090NA;60 - flip angle: 90 degrees
GRE T1
- TR:Variable
-
TE: <
;3070-110NA;30 - flip angle: 70-110 degrees
GRE T2*
- TR:Variable
-
TE: <
;305-20NA;30 - flip angle: 5-20 degrees
STIR
- TR:>2000
-
TE: >
;60180;60 -
flip angle: 180 ->
;90120; 90 degrees - inversion time (TI): 120-170
FLAIR
- TR:>3000
-
TE: >80
, - variable
1700 - 1700–2200
-<p>Listed in the table below are the most common acquisition parameters for commonly used MRI pulse sequences. The specific parameters for any given study varies from one manufacturer to another, and from one imaging center to another. </p><p><strong>Sequence</strong><strong>TR<br>(msec)</strong><strong>TE<br>(msec)</strong><strong>Flip Angle<br>(degrees)</strong><strong>Inversion Time<br>(msec)</strong></p><p><a href="/articles/http-radiopaedia-org-articles-t1-weighted-image"><strong>T1</strong></a><800<3090NA</p><p><strong>PD</strong>>1000<3090NA</p><p><a href="/articles/t2-weighted-image"><strong>T2</strong></a>>2000>8090NA</p><p><strong>FSE T2</strong>>2000>6090NA</p><p><strong>GRE T1</strong>Variable<3070-110NA</p><p><strong>GRE T2*</strong>Variable<305-20NA</p><p><strong>STIR</strong>>2000>60180->90120-170</p><p><strong>FLAIR</strong>>3000>80, variable 1700–2200</p>- +<p>Listed in the table below are the most common acquisition parameters for commonly used MRI pulse sequences (in msec). The specific parameters for any given study varies from one manufacturer to another, and from one imaging center to another. </p><p><a href="/articles/http-radiopaedia-org-articles-t1-weighted-image"><strong>T1</strong></a></p><ul>
- +<li>TR:<strong> </strong><800</li>
- +<li>TE: <30</li>
- +<li>flip angle: 90 degrees</li>
- +</ul><p><strong>PD</strong></p><ul>
- +<li>TR:<strong> </strong>>1000</li>
- +<li>TE: <30</li>
- +<li>flip angle: 90 degrees</li>
- +</ul><p><a href="/articles/t2-weighted-image"><strong>T2</strong></a></p><ul>
- +<li>TR:<strong> </strong>>2000</li>
- +<li>TE: >80</li>
- +<li>flip angle: 90 degrees</li>
- +</ul><p><strong>FSE T2</strong></p><ul>
- +<li>TR:<strong> </strong>>2000</li>
- +<li>TE: >60</li>
- +<li>flip angle: 90 degrees</li>
- +</ul><p><strong>GRE T1</strong></p><ul>
- +<li>TR:<strong> </strong>Variable</li>
- +<li>TE: <30</li>
- +<li>flip angle: 70-110 degrees</li>
- +</ul><p><strong>GRE T2*</strong></p><ul>
- +<li>TR:<strong> </strong>Variable</li>
- +<li>TE: <30</li>
- +<li>flip angle: 5-20 degrees</li>
- +</ul><p><strong>STIR</strong></p><ul>
- +<li>TR:<strong> </strong>>2000</li>
- +<li>TE: >60</li>
- +<li>flip angle: 180 -> 90 degrees</li>
- +<li>inversion time (TI): 120-170</li>
- +</ul><p><strong>FLAIR</strong></p><ul>
- +<li>TR:<strong> </strong>>3000</li>
- +<li>TE: >80</li>
- +<li>variable </li>
- +<li>1700–2200</li>
- +</ul>
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