Summary of the prevalence of low and high Cramer-Rao lower bounds (CRLB) for citrate detection in spectra acquired in controls with negative MR imaging results and unremarkable clinical follow-up
| All | Age > 6 Months (Group A) | Age < 6 Months (Group B) | |
|---|---|---|---|
| Subjects (Spectra) | Subjects (Spectra) | Subjects (Spectra) | |
| #CRLB < 25% | 39 (43) | 0 (0) | 39 (43) |
| #CRLB ≥ 25% | 430 (572) | 275 (359) | 155 (213) |
| Total | 469 (615) | 275 (359) | 194 (256) |
| Mean Cit CRLB | 240% ± 348% | 357% ± 394% | 80% ± 173%* |
Note:—CRLB indicates Cramer-Rao lower bounds; #CLRB < 25%, number of subjects in whom CRLB for Cit was less than 25%; #CRLB ≥ 25%, number of subjects in whom CRLB for Cit was equal to or greater than 25%.
* P < .0001 (2-sided Student ttest) group A vs. group B.