For the spread flat dried plant samples, the track registration coefficient of 0.74 was used.
As the samples analyzed using the α-track detector were all exposed to the same conditions, activities in different structural parts of the sample can be compared, neglecting the registration coefficient.
The registration coefficient for the stem segments embedded in the epoxy resins and trimmed ones was 0.9, which was a characteristic of smoothly trimmed sections adhering to the detector (Ilic and Durrani 2003; Omel'yanenko et al. 2007).
The MRI datasets were registered to the MNI template using a deformable method (IRTK) [121], and the output registration coefficients by IRTK were applied to register the PET images to the same template.
After bias and artifacts correction in fMRI, a mean image of the series, or a co-registered anatomical image, e.g., sMRI, is used to estimate some registration coefficients that map it onto a template, followed by spatial smoothing and parameter estimation.
The system has six main technical components: the package of services paid through the per capita rate, the base per capita, adjustment coefficients, enrolment/registration, financial management and reporting system, and quality monitoring system.
So, it is suitable for using correlation coefficient registration method.
For each animal, the scan series were aligned to the postoperative scan using rigid registration, with a minimum correlation coefficient of 0.8, convergence criterion of 1 × 10−5, and maximum 2000 iterations [ 17, 18].
This more parsimonious model resulted in an adjusted coefficient of 0.18 registrations per 100 000 population per year, per 1 Bq m−3 increase (95% CI 0.04, 0.32), P=0.011.
As for calcium, the questionnaire underestimated the intake compared to the 24-h recalls (619 vs. 724 mg/day), Spearman's correlation coefficient between the registrations made by the two methods was 0.50 (95% CI 0.39 0.59), 68% of the subjects were classified into the same or adjacent calcium quintile by the two methods, and 2% were classified in the extreme quintile.
To quantify the registration quality, we evaluate Pearsons correlation coefficient R and the NMSE between the manually obtained time intensity curves Kgt and the pre-and post registration curves Korg, and Kreg respectively.
