Limits...
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.


Correlation between actual (N)and estimated (N’) radioactivities at NaIdevice
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4998199&req=5

Fig2: Correlation between actual (N)and estimated (N’) radioactivities at NaIdevice

Mentions: The correlation (Pearson’s r)between N’ and the radioactivity measurement(N) was 0.9986 with the 95 % confidenceinterval extended from only 0.998 to 0.999 (p < 0.001) as shown in Fig. 2. The differences between N’ andN were tested by using the statistical pairedt test. The mean and standard deviation (SD) ofthe difference were 0.174 and 7.326, respectively. The 95 % confidence interval forthe mean was from −1.28 to 1.63 including zero (p = 0.813).Fig. 2


A robust conversion method ofradioactivities between plastic and NaI scintillation well counters for long-term quality control and quality assurance
Correlation between actual (N)and estimated (N’) radioactivities at NaIdevice
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig2: Correlation between actual (N)and estimated (N’) radioactivities at NaIdevice
Mentions: The correlation (Pearson’s r)between N’ and the radioactivity measurement(N) was 0.9986 with the 95 % confidenceinterval extended from only 0.998 to 0.999 (p < 0.001) as shown in Fig. 2. The differences between N’ andN were tested by using the statistical pairedt test. The mean and standard deviation (SD) ofthe difference were 0.174 and 7.326, respectively. The 95 % confidence interval forthe mean was from −1.28 to 1.63 including zero (p = 0.813).Fig. 2

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&rsquo;) from the PL device activity (P) were statistically analyzed.

Results: N&rsquo; was determined from P as N&rsquo;&thinsp;=&thinsp;4.45 P&thinsp;+&thinsp;6.28 with high correlation (r&thinsp;=&thinsp;0.997). The Bland-Altman analysis between N&rsquo; 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.