Recalling that for a 6MV beam, d max occurs at 1.5cm depth and loses approximately 4%/cm beyond this depth, we can compute that the %DD at this point is approximately 1 - (12.25 - …

Download scientific diagram | PDD curves of 6 MV, 6 MV FFF, 10 MV, 10 MV FFF, and 18 MV photon beams of a 10 × 10 cm 2 field at 100 cm SSD. ... The maximum depth for 6MV …

Table 1: PDD of photon beam for 6MV, 9MV and 15MV at different depth . The percentage depth dose graph for all our data of measurements for the three photon energies are pre-sented as …

2017年7月1日 · For this purpose, the dose distribution (percentage depth dose (PDD) and beam profile) was calculated and compared to the experimental data, using gamma index criteria. …

2023年7月28日 · For 6MV flattened beam, d max variation had a maximum of 0.69 mm from baseline (reference data). For 6MV FFF beam the maximum deviation was 0.82 mm from …

2022年7月14日 · pdd的中文名是 百分深度剂量 ，通俗来说，描述了射线能量沉积与模体深度之间的关系，比如在体表处沉积的能量是多少，在某一深度处沉积的能量是多少。. 对于电子直线 …

2017年6月1日 · Tzedakis et al. (2014) found out that the percentage depth dose (PDD) curve were considerably sensitive to the mean energy of the incident electron whereas insensitive to …

2022年10月1日 · Geometrical source modeling of 6MV flattening-filter-free (FFF) beam from TrueBeam linear accelerator and its commissioning validation using Monte Carlo simulation …

对于电子直线加速器产生的x射线来说，不同能量的x射线具有不同特点的pdd，比如6mv x射线的pdd曲线与10mv x射线的pdd曲线是不同的。 随着X射线能量的增加，PDD曲线有一个变化的 …

Abstract：A method based on simulated annealing (SA) algorithm to reconstruct 6MV X-ray energy spectra from medical linear accelerators was investigated in this work, utilizing both …