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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.