In radiosurgery treatments, there is always an absorbed dose (D) that is deposited outside the treatment field, this D is known as "Peripheral Dose" (PD). The objective of this work was to evaluate PD in 9 anatomical positions (eyes, thyroid, upper lungs, mediastinum, breasts and navel) of an anthropomorphic phantom. The development of the work contemplates the use of the EBT2 radiochromic films, and a photon beam of 6 MV generated in a linear accelerator Clinac 2100C / D. Analyzing the influence of collimator size, greater DP ((150.81 ± 0.97) cGy) was found in the right eye of the phantom for the collimator of 3 cm with a target fixed in the upper right plane of the head of the phantom and its influence with the distance of, a PD of (27.14 ± 1.04) cGy in the thyroid, for a target positioned in the lower left plane of the phantom head for a prescribed dose of 18 Gy. It is concluded tha...

In radiosurgery treatments, there is always an absorbed dose (D) that is deposited outside the treatment field, this D is known as "Peripheral Dose" (PD). The objective of this work was to evaluate PD in 9 anatomical positions (eyes, thyroid, upper lungs, mediastinum, breasts and navel) of an anthropomorphic phantom. The development of the work contemplates the use of the EBT2 radiochromic films, and a photon beam of 6 MV generated in a linear accelerator Clinac 2100C / D. Analyzing the influence of collimator size, greater DP ((150.81 ± 0.97) cGy) was found in the right eye of the phantom for the collimator of 3 cm with a target fixed in the upper right plane of the head of the phantom and its influence with the distance of, a PD of (27.14 ± 1.04) cGy in the thyroid, for a target positioned in the lower left plane of the phantom head for a prescribed dose of 18 Gy. It is concluded tha...