Exact(4)
Despite the low sample mass, a counting time of less than 30 s per 1-h aerosol sample led to sufficient counting statistics.
In order to improve the accuracy of the non-thermal velocities determined from the full width at half maximum (FVJHM) intensities of the lines, we select data with sufficient counting statistics such that the uncertainty of the non-thermal velocity is less than 10%% of its value derived from the FWHMs.
For the purpose of studying FM counting patterns in the period preceding the DFM event, we delimited the subset to DFM events where women had sufficient counting observations recorded.
Therefore, the PET data acquisition will be performed in one single bed position and last over 30 minutes to collect sufficient counting statistics for imaging, following the same clinical protocol reported by other investigators in previous clinical trials in USA [ 6, 10].
Similar(56)
Each μ-EDXRF analysis was performed in 50 s to obtain sufficient counts.
A challenge with PIXE-T is to get sufficient counts while retaining a small beam spot size.
As this activity was too low for a short SPECT scan, the mouse was scanned for 4 h post-mortem in order to allow acquisition of sufficient counts.
In a functional PET/MR study, it is difficult to get good temporal resolution of activity distribution from PET images because of the need to image for a certain length of time to get sufficient count statistics (image SNR).
Given the sufficient count rate capacity of the system [21] confirmed by in-house performance measurements of count losses according to the NEMA NU 2 2007 methods [22], it was chosen to not incorporate a copper ring between the source and the LSO crystals to lower the count rate originating from the bremsstrahlung [19, 23].
The 15O-water and 18F-FDDNP PET data were integrated over 0 10-min and 0 10-minpost-injection, respectively, so andto enhance detection of distribution boundaries and cortical regions and to provide sufficient counts for accurate co-registration with MR image.
Imaging continued for 90 min or until sufficient counts were recorded.
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