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2.1 Summary of parameters.

      Source: Catherine Westbrook and John Talbot, MRI in Practice, 5th ed., John Wiley & Sons, 2019.

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1.5 T 3T
CSE CSE
Short TE Minimum–30 ms Short TE Minimum–15 ms
Long TE 70 ms+ Long TE 70 ms+
Short TR 300–700 ms Short TR 400–800 ms
Long TR 2000 ms+ Long TR 2500 ms+
FSE/TSE FSE/TSE
Short TE Minimum – 20 ms Short TE Minimum–15 ms
Long TE 90 ms+ Long TE 90 ms+
Short TR 400–600 ms Short TR 400–600 ms
Long TR 4000 ms+ Long TR 4000 ms+
Short ETL/TF 2–6 Short ETL/TF 2–6
Long ETL/TF 20+ Long ETL/TF 20+
IR T1 IR T1
Short TE Minimum–20 ms Short TE Minimum–20 ms
Long TR 3000 ms+ Long TR 3500 ms+
TI Short or null time of tissue TI Short or null time of tissue
Short ETL/TF 2–6 Short ETL/TF 2–6
STIR STIR
Long TE 60 ms+ Long TE 60 ms+
Long TR 3000 ms+ Long TR 3000 ms+
Short TI 100–175 ms Short TI 210 ms
Long ETL/TF 20+ Long ETL/TF 20+
FLAIR FLAIR
Long TE 80 ms+ Long TE 80 ms+
Long TR At least 4× TI Long TR At least 4× TI
Long TI 1700–2500 ms Long TI 1700–2500 ms
Long ETL/TF 20+ Long ETL/TF 20+
Rewound GRE Rewound GRE
Long TE 10–15 ms Long TE 10–15 ms
Short TR <50 ms Short TR <50 ms
Flip angle 30° to 45° Flip angle 30° to 45°
Spoiled GRE Spoiled GRE
Short TE Minimum Short TE Minimum
Short TR <50 ms Short TR <50 ms
Flip angle 30° to 45° Flip angle 30° to 45°