Table 1:
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.