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library:thoracolumbar_spine [2025/03/11 13:10] – [Tips and Tricks] scottlibrary:thoracolumbar_spine [2025/03/18 16:01] (current) – [Tips and Tricks] scott
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 ==Myelography== ==Myelography==
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 +{{:library:3dmyeloprofile.png?600|}}  {{:library:2dhastemyeloprofile.png?600|}}
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 +==T2* Weighting==
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 +{{:library:mergespineprofile.png?600|}}
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 +==T2 Weighting==
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 +Most modern scanners will have an option for a Driven Equilibrium pulse sequence that incorporates and additional -90 degree pulse to 'flip back' the transverse magnetization along the Z axis. This has the effect of speeding up longitudinal recovery even for very long T1 tissues like CSF, meaning that it isn't necessary to have very long TR's. When performing a T2 weighted sequence with this modification, TR can be as low as 1500ms in some cases, while maintaining high signal from CSF. On a GE scanner this option is known as **Fast Recovery FSE (FR-FSE)** and can be found in most GE spine protocols. On a Siemens scanner, this is known as **Restore**, and may be a check box on the contrast tab, or may be found in Siemens spine protocols. These options can shorten scan time, especially when only a few slices are needed, as is the case with sagittal spine imaging.
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