Mostrando 2,101 - 2,120 Resultados de 2,457 Para Buscar '"Oar"', tiempo de consulta: 0.18s Limitar resultados
  1. 2101
    “…The dosimetric parameters of planning target volume (PTV) and organ at risks (OARs) as well as the time parameters (monitor unit, MU) were statistically analyzed. …”
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  2. 2102
    “…For targets and organs at risk (OARs), the dosimetric impacts of R(Error), T(Error), and T+R(Error) were evaluated without and with moderate correction of setup errors. …”
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  3. 2103
    “…We hypothesize that VBS-CSI utilizing volumetric modulated arc therapy (VMAT) could also effectively reduce dose to vertebral bodies and surrounding organs-at-risk (OARs), minimizing toxicity for adult patients with LMD and comparing favorably to proton-based CSI. …”
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  4. 2104
    “…A global scoring method was developed to evaluate plans according to their degree of success in meeting dose objectives (lower scores are better than higher ones). For OARs the range of scores was between 0.75 ± 0.15 (Eclipse) to 0.92 ± 0.18 (Pinnacle(3 )with physical optimisation). …”
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  5. 2105
    “…Various dosimetric variables, such as PTV coverage, OARs sparing, delivery efficiency and planning time, were evaluated for each plan. …”
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  6. 2106
  7. 2107
    “…The target parameters, including the homogeneity index (HI) and conformity index (CI), and doses to the organs at risk (OARs) were analyzed. RESULTS: Dosimetric parameters for PTV and OARs were comparable among the three techniques. …”
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  8. 2108
  9. 2109
  10. 2110
    “…Gross tumor volume (GTV) and surrounding organ at risks (OARs) were contoured on the average 4DCT scan. Planning target volume was generated from GTV by adding an isotropic 3 mm margin and excluding overlap areas with OARs. …”
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  11. 2111
  12. 2112
    “…CONCLUSIONS: Proposed beam geometries for PTV1 and PTV2 proton plans presented good treatment accuracy with similar target coverage as the VMAT plans. Better sparing of OARs was achieved at the low-medium dose region for the proton plans.…”
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  13. 2113
  14. 2114
    “…Meanwhile, compared with FB, DIBH was characterized by lower doses to OARs, which may reduce the probability of cardiac and pulmonary complications in the future.…”
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  15. 2115
    “…Similarly, compared to FJ‐VMAT, JT‐VMAT provided better protection to most organs at risk (OARs), particularly for total lung and heart. In comparison with IMRT, VMAT significantly improved the conformity index (CI) of the planning target volume for the three lung cancer classifications, and it reduced the dose of almost all OARs except V(5Gy) and D(mean) of the total lung. …”
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  16. 2116
    “…Patient was computed tomography (CT)-scanned, and reconstruction of target volume and surrounding organs at risk (OARs) were performed using treatment planning system (TPS). …”
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  17. 2117
  18. 2118
  19. 2119
    “…Feasibility is defined as > 70% of participants with clinically acceptable visualization/delineation as determined by blinded dual neuroradiologist review for clinically acceptable visualization/delineation of organs-at-risk (OARs) and target volume(s). Exploratory endpoints involve radiation dosimetry analysis of OARs and target volumes as well as documenting the use of adaptive planning. …”
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  20. 2120
    “…Compared to IMRT and VMAT planning, IMPT planning improved the TCP (p<0.001, p<0.001, respectively). As for OARs, IMPT reduced the bilateral lung and heart accepted irradiation dose and volume. …”
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