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Table 6 Comparison between protocols of hospitals and modified margins

From: A comparison of two systems of patient immobilization for prostate radiotherapy

Immobilization device Protocol of hospitals Modified margins for each axis (mm)
Whole body alpha-cradle 0.5 to 1 cm (1 cm margin is usually used except 0.6 cm posteriorly) 7.8 8 3.9
Thermoplastic Hipfix system 1 cm (0.5 cm for posterior margin) 8.3 14.2 2.4