Dose Verification in Intensity Modulation Radiation Therapy: A Fractal Dimension Characteristics Study

Figure 7

In this figure, the selected 85% is interesting to study. The fractal dimension magnitude criterion of acceptability between the desired planning curves and the delivered dose curves can be made by descending or increasing the isodose curves from 85% downwards or upwards to see which isodose curve is still regarded as one fractal value. When the fractal dimensions, 83% and 87%, are compared to 85% curve, the variation of fractal dimension is within 1%, which means that the two curves are identical only if their fractal dimension is within 1%.