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Figure 4. The plot of normalizedf(d) values from measured air kerma (dots) and theoretically derived F(d) (lines) vs nominal distance d for the 0.6 cm3 chamber at position B. The measured f(d) curves were fitted by theoretical curves F(d) of corresponding offsets (
) with varying scattered components (Es). The offsets () in nominal distance were +0.3 cm, +0.1 cm, –0.1 cm, –0.3 cm, and –0.5 cm, respectively. The percentage value in brackets is the scatter component. The mean of scattered components was 0.59±0.06% at the centre of the room for the 0.6 cm3 chamber at position B in the jig.
