This becomes critical for applications such as enzyme activity assays that require measurement over longer time periods, as considered in this paper.
On the other hand, another semi-quantitative measure, standardized uptake value (SUV), could provide a further simplification relative to RI, as it does not require measurement of blood time-activity curves, nor dynamic scanning.
Note that both in vivo methods do require measurement series over several time points.
On this basis, the study of 2007 was repeated, resulting in a much more complete dataset while at the same time requiring less measurement time (Picotti et al. 2013).
Appraisal of change over time in individuals requires measurement of DNA methylation at more than a single time point.
ISO accreditation also requires measurement of critical processes (for example, time from sample collection to ultra-low-temperature archiving) and continuous improvement efforts to optimize the performance of the organization.
As a consequence, detecting such signals usually requires longer measurement times and/or higher protein concentration, as only a single proton is being measured instead of three as in the case of methyl groups.
Two methods were tested: a diffusion-edited CPMG technique and a strongly T 1-weighted conventional CPMG method requiring total measurement times of about 39 and 7 s, respectively.
baPWV is a simple alternative and requires short measurement times.
