Table 1 Timings and results for untriggered, end-systole and diastasis triggered measurements. Data from the selected voxels of all volunteers are pooled and given as mean ± SD.
From: Investigating the effect of trigger delay on cardiac 31P MRS signals
Untriggered | End-systole | Diastasis | Mean\(^{\mathrm{a}}\) | ||
|---|---|---|---|---|---|
Heart rate (bpm) | 58 ± 9 | 59 ± 10 | 60 ± 9 | 60 ± 9 | |
\(\hbox {T}_{{\mathrm{R,eff}}}\) (ms) | 2138 ± 217 | 2114 ± 358 | 2061 ± 318 | 2069 ± 303 | |
Total scan time (min) | 12.7 ± 1.5 | 14.1 ± 1.3 | 13.9 ± 1.2 | 13.6 ± 1.5 | |
Trigger delay (ms) | N/A | 248 ± 26 | 682 ± 89 | N/A | |
Trigger delay (\(\%\)) | N/A | 24 ± 5 | 68 ± 9 | N/A | |
SNR (PCr) | 23.0 ± 7.5 | 27.5 ± 9.6* | 20.9 ± 5.8† | 23.0 ± 7.2 | |
PCr/ATP | Value | 1.79 ± 0.25 | 1.72 ± 0.27 | 1.72 ± 0.33 | 1.75 ± 0.27 |
CRLB | 0.22 ± 0.07 | 0.17 ± 0.06* | 0.22 ± 0.06† | 0.21 ± 0.07 | |
Pi/PCr | Value | 0.14 ± 0.04 | 0.14 ± 0.05 | 0.15 ± 0.07 | 0.15 ± 0.05 |
CRLB | 0.05 ± 0.01 | 0.05 ± 0.01 | 0.06 ± 0.01† | 0.05 ± 0.02 | |
pH | Value | 7.050 ± 0.085 | 7.047 ± 0.053 | 7.068 ± 0.053 | 7.057 ± 0.061 |
CRLB | 0.031 ± 0.015 | 0.027 ± 0.011 | 0.035 ± 0.013† | 0.031 ± 0.013 |
