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^99mTc-DMSA Absolute Uptake: Normal Pediatric Values at 2–4 Hours

Nuclear Medicine, Perth Radiological Clinic, Perth, Western Australia

View larger version (20K): [in a new window]   FIGURE 1. Box-plots of absolute uptake of DMSA by sex. The box represents Quartile 1, Median and Quartile 3 of the data points. Whiskers show min to max data points, out to 1.5 X Interquartile range. The mean is indicated by a point within the box.

View larger version (16K): [in a new window]   FIGURE 2. Scatter-plot of age of child against DMSA absolute uptake.

View larger version (18K): [in a new window]   FIGURE 3. Scatter-plot of DMSA injected (mg) against DMSA absolute uptake.

View larger version (29K): [in a new window]   FIGURE 4. Residual plots for multiple regression analysis. The fit of the regression line is examined by plotting the differences between the observed and predicted values of y, the residuals. Outliers are points with unusually large residuals. The residuals above the regression line should ideally mirror those below.

View larger version (32K): [in a new window]   FIGURE 5. Residual plots excluding the 4 outliers.

View larger version (20K): [in a new window]   FIGURE 6. Plot of 95% confidence intervals for age of child against DMSA absolute uptake. Confidence intervals are used to estimate the mean of the future observations of the population.

View larger version (21K): [in a new window]   FIGURE 7. Plot of 95% confidence intervals for DMSA injected against DMSA absolute uptake.

View larger version (21K): [in a new window]   FIGURE 8. Plot of 95% prediction intervals for age of child against DMSA absolute uptake. Prediction intervals are used to estimate a single future observation within the population.

View larger version (22K): [in a new window]   FIGURE 9. Plot of 95% prediction intervals for DMSA injected against DMSA absolute uptake.

View larger version (20K): [in a new window]   FIGURE 10. Plot of DMSA absolute uptake against time between injection and scanning.

View larger version (15K): [in a new window]   FIGURE 11. Plot of age against DMSA injected (mg).

View larger version (48K): [in a new window]   FIGURE 12. Plot of example prediction intervals for age and DMSA uptake with a standard injection of 0.36mg DMSA (calculated using the regression equation).