Sentence examples for sheets source from inspiring English sources

As required by international guidelines and national regulations, the study file, signed informed consent sheets, source documents, copy of the CRF and subject identification codes will be retained for at least 2 years (or for the time period required by national legislation) at each study site (ICH-GCP 4.9.5) to allow for audits and inspections even after the study completion.

Manufacturers recommend obtaining flood phantom images of a sheet source for daily quality assurance (DQA).

Thus, daily sheet source count rate may still be useful for quantitative quality control.

Recall that the sensitivity factor is based on the extrinsic flood count rate measured with a 57Co sheet source.

During this period, a 57Co sheet source was imaged daily with the system's low-energy high-resolution (LEHR) collimators.

Camera sensitivity variation measured using a 57Co sheet source was small and had a weak relationship to calibration factor variations.

The camera sensitivity measured with a 57Co sheet source was very stable with time and did not contribute significantly to the overall variability.

Note that since the count rate was estimated over a large region of interest, the uniformity of the sheet source would have a small effect on sensitivity variations due to variations in source position.

A static acquisition of the sheet source placed between the two cameras and as close as possible to the collimators was performed and stopped when 106 counts per camera were collected.

In addition, since the sheet source count rate was only used as an indicator of the stability of camera sensitivity, the only impact of the accuracy of the specified flood source activity would be discontinuities in the count rate from the 57Co source when a new source is used.

The dead time, τ, was estimated based on the fitting observed count rate at each acquisition time, t, as a function of the activity of the 57Co sheet source, A t), at time t, with the equation describing paralyzable count rate behavior: Observed count rate t = C × A × exp − τ × C × A t (2).