Web01. jun 2014. · Changing the sampling resolution from 4 to 2 mm resulted in an increase in gamma index by about 3.7%. The deviation of the gantry in 8° intervals in either directions changed the gamma index only ... WebArticle Snippet: For consistency, MapCHECK2 dose planes were interpolated using a bilinear method to match the EPID resolution, and comparisons between MapCHECK2 …
Evaluation of parameters affecting gamma passing rate in patient ...
WebThe gantry angle deviation and sampling resolution are less effective on gamma index value reduction. Among the studied parameters, the azimuthal angle is one of the most … WebAs shown in Figure 8, changing resolution from 4 to 2 mm results in an increase in gamma index by about 3.7%. However, further reduction of grid size or sampling resolution to 0.5 mm had no ... the color psychology of yellow
Quantitative evaluation of dosimetric uncertainties in …
WebCharacteristics measures field sizes as small as 5 x 5 mm² detector spacing and resolution specifically designed for SRS applications runs on SNC Patient software (same software as ArcCHECK and MapCHECK2) SRS patient specific quality assurance and end-to-end testing Would you like to know more about SRS MapCHECK? Please contact PEO! WebMapCHECK2 is a two-dimensional diode arrays planar dosimetry verification system. Dosimetric results are evaluated with gamma index. This study aims to provide comprehensive information on the impact of various factors on the gamma index values of MapCHECK2, which is mostly used for IMRT dose verification. WebThe azimuthal angle is defined as any rotation of collimators or the MapCHECK2 around the central axis, which was varied from 5 to -5°. The gantry angle was changed from -8 to 8°. Isodose sampling resolution was studied in the range of 0.5 to 4 mm. The effects of additional buildup on gamma index in three cases were also assessed. Results: the color purple 1985 cast nettie