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A robust conversion method ofradioactivities between plastic and NaI scintillation well counters for long-term quality control and quality assurance

View Article: PubMed Central - PubMed

ABSTRACT

Purpose: The purpose of this study is to specify a simple procedure for arobust data conversion of radioactivity value between plastic scintillator (PL)and NaI scintillator (NaI) devices.

Materials and methods: The radioactivity estimate of 100 blood samples was measured by thetwo devices. The two radioactivities were plotted on the same graph. Theleast-squares method was applied to obtain the conversion function. Thedifferences between the actual radioradioy (N)from the NaI device and the estimated radioactivity for NaI (N’) from the PL device activity (P) were statistically analyzed.

Results: N’ was determined from P as N’ = 4.45 P + 6.28 with high correlation (r = 0.997). The Bland-Altman analysis between N’ and N showed nofixed bias and no proportional bias.

Conclusions: A hundred blood samples using a fixed type of sample tubes and afixed radionuclide may be required to set up the robust conversionfunction.

No MeSH data available.


Conversion function from PL (P) to NaI (N)devices
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Fig1: Conversion function from PL (P) to NaI (N)devices

Mentions: All of the collected samples were plotted on the graph as shown inFig. 1. The least-squares (LS) methodwas applied to obtain the conversion function from the PL counter to the NaIcounter. The PL and NaI count pair is designated as (PLi, NaIi) where the index for the data point is i. The conversion function based on the LS method was definedas:Fig. 1


A robust conversion method ofradioactivities between plastic and NaI scintillation well counters for long-term quality control and quality assurance
Conversion function from PL (P) to NaI (N)devices
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4998199&req=5

Fig1: Conversion function from PL (P) to NaI (N)devices
Mentions: All of the collected samples were plotted on the graph as shown inFig. 1. The least-squares (LS) methodwas applied to obtain the conversion function from the PL counter to the NaIcounter. The PL and NaI count pair is designated as (PLi, NaIi) where the index for the data point is i. The conversion function based on the LS method was definedas:Fig. 1

View Article: PubMed Central - PubMed

ABSTRACT

Purpose: The purpose of this study is to specify a simple procedure for arobust data conversion of radioactivity value between plastic scintillator (PL)and NaI scintillator (NaI) devices.

Materials and methods: The radioactivity estimate of 100 blood samples was measured by thetwo devices. The two radioactivities were plotted on the same graph. Theleast-squares method was applied to obtain the conversion function. Thedifferences between the actual radioradioy (N)from the NaI device and the estimated radioactivity for NaI (N’) from the PL device activity (P) were statistically analyzed.

Results: N’ was determined from P as N’ = 4.45 P + 6.28 with high correlation (r = 0.997). The Bland-Altman analysis between N’ and N showed nofixed bias and no proportional bias.

Conclusions: A hundred blood samples using a fixed type of sample tubes and afixed radionuclide may be required to set up the robust conversionfunction.

No MeSH data available.