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

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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.


Bland-Altman plot of estimated radioactivities from PL device(N’) and actual counts (N) by NaI device
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Fig3: Bland-Altman plot of estimated radioactivities from PL device(N’) and actual counts (N) by NaI device

Mentions: Figure 3 shows theBland-Altman plot between N’ and N. There is no fixed bias (paired t test, p = 0.813) and noproportional bias (Correlation test, Pearson’s r = 0.032 [−0.165, 0.227], p = 0.749).Fig. 3


A robust conversion method ofradioactivities between plastic and NaI scintillation well counters for long-term quality control and quality assurance
Bland-Altman plot of estimated radioactivities from PL device(N’) and actual counts (N) by NaI device
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig3: Bland-Altman plot of estimated radioactivities from PL device(N’) and actual counts (N) by NaI device
Mentions: Figure 3 shows theBland-Altman plot between N’ and N. There is no fixed bias (paired t test, p = 0.813) and noproportional bias (Correlation test, Pearson’s r = 0.032 [−0.165, 0.227], p = 0.749).Fig. 3

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.