Revisiting fetal dose during radiation therapy: evaluating treatment techniques and a custom shield [JACMP, 17(5), 2016]

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. © 2017 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine. TAB L E 7 The estimated fetal doses with and without the fetal shield based on the measured clinical plans listed in Table 2. A distance of 50 cm was maintained between the CT reference and the ion chamber used for these measurements, as shown in Fig. 2(a). The distance displayed in this Table is the measured distance between the center of the PTV and the ion chamber for each clinical setup Distance (cm) Total PTV (or CAX) dose (Gy) PD without shield (cGy) PD with shield (cGy) Brain 3D 50 54 0.81 0.70 Brain 3D FFF 50 54 0.65 0.59 Brain IMRT 50 54 3.19 2.21 Brain VMAT 50 54 2.27 1.73 Whole brain 50 30 2.16 1.98 Head and neck 3D 40 66 7.33 4.95 Head and neck IMRT 40 66 18.35 17.03 Head and neck VMAT 40 66 11.15 10.69 LUL 3D 30 60 7.02 5.10 LUL IMRT 30 60 8.28 5.04