1.5T CNR measurements*
| Sequence | Red Nucleus CNR | Substantia Nigra CNR | Medial Geniculate CNR | |||||
|---|---|---|---|---|---|---|---|---|
| IA/RN | IA/RN capsule | RN/RN capsule | IA/SNc | CC/SNr | SNc/SNr | CMG/LMG | CMG/IA | |
| T2 tse | 4.13 | – | – | 6.19† | 4.97† | – | – | – |
| T2 tse SD | 1.23 | – | – | 1.44† | 1.48† | – | – | – |
| SWI | 5.97 | 1.43 | 4.54 | 5.58 | 2.84 | 3.74 | 1.38 | 0.45 |
| SWI SD | 1.78 | 0.73 | 1.62 | 0.6 | 0.75 | 1.46 | 1.47 | 0.35 |
RN indicates red nucleus; SNc, substantia nigra, pars compacta; SNr, substantia nigra, pars reticulata; IA, intermediate area between the RN and SN; CC, crus cerebri; LMG, lateral aspect of the medial geniculate body; CMG, central aspect of medial geniculate body; tse, turbo spin-echo; CNR, contrast-to-noise ratio.
* The first row for each sequence represents the mean in a given region of interest and the second row represents the SD in the same region of interest. HP-filtered-phase data were used for SWI CNR measurements; no contrast for the given regions of interest was observed in the gradient-echo T1 data. Empty data boxes show that CNRs between certain structures could not be calculated because the structures could not be detected.
† Because SNc and SNr were not separable for T2, CNR is recorded here for IA/SN and CC/SN.