Mostrando 2,401 - 2,420 Resultados de 2,457 Para Buscar '"Oar"', tiempo de consulta: 0.23s Limitar resultados
  1. 2401
    “…The reference CT with contouring data set of target volumes [gross tumor volume (GTV) and PTV] and OARs (organs at risk) was transferred from iPlan to Eclipse (Varian Medical Systems, Tokyo, Japan). …”
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  2. 2402
    “…Dose objectives were met for all organs at risk (OARs) for each treatment plan. Median target coverage was GTV V100% = 87.3%, clinical target volume (CTV) V100% = 95.7% and PTV V100% = 88.0% for single fraction plans; GTV V100% = 95.6, CTV V100% = 99.6% and PTV V100% = 97.2% for three fraction plans; and GTV V100% = 99.6%, CTV V100% = 99.1% and PTV V100% = 97.2% for five fraction plans. …”
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  3. 2403
    “…High-risk clinical target volume (CTV(HR)) and organs at risks (OARs) were contoured. Four fractions of 6.5 Gy were prescribed to CTV(HR) using inverse planning technique. …”
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  4. 2404
    “…The dosimetric parameters (CI, nCI, GI, etc.) and gEUD values of PTV and OARs were calculated. Linear regression between MU‐weighted/unweighted MLC position error and gEUD was performed to obtain dose sensitivity. …”
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  5. 2405
    “…The dosimetric parameters of the planning target volume (PTV) and organs at risk (OARs) were compared and focused on dosimetric differences in FL. …”
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  6. 2406
    “…Patients with IIIB treated with IC/IS brachytherapy tended to improve DFS compared with IC alone, and obtained similar HR-CTV D(90) EQD(2) (n = 10) and biological effective dose (BED), 91 ±6 Gy vs. 89 ±3 Gy, and 107 ±4.5 Gy vs. 107 ±5.6 Gy, whereas decreased organs at risk (OARs) doses, including rectum and bladder D(2cm3) were 7.5 Gy and 7.2 Gy lower, respectively. …”
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  7. 2407
    “…Dosimetry variables analyzed included D(2cc), D(1cc), and D(0.1cc) for organs at risk (OARs) and distance from cylinder surface to 150% and 200% isodose line in vaginal mucosa. …”
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  8. 2408
    por Ji, Tianlong, Sun, Lu, Cai, Feng, Li, Guang
    Publicado 2021
    “…Subsequently, the following parameters for PTV were calculated and compared: D (2%), D (98%); the mean dose, maximum dose, and minimal dose for OARs. Plan modulation index, total MUs, and the gamma index were used to evaluate the plan quality. …”
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  9. 2409
    “…In conclusion, the CS-KBP model significantly improved cardiac-substructure sparing without exceeding the tolerances of other OARs or compromising PTV coverage.…”
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  10. 2410
    “…In general, we observed 95% of the prescription dose to PTV achieved with an average 7.6% increase of max and mean dose, respectively, to OARs for predicted replans. Complete adaptive plans were predicted in ≤20 s using a GTX 1660TI GPU. …”
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  11. 2411
    “…The dosimetric parameters evaluated were: (1) physical dosimetric parameters (number of monitor units (MUs), conformity index (CI), dose gradient index (DGI), beam on time (BOT)); (2) clinical dosimetric parameters pertaining to target volume (PTV) and organs at risk (OARs). Two treatment plans were performed for all patients: one used 6 MV FFF beams and the other used 6 MV flattened beams. …”
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  12. 2412
    “…To our knowledge, there have been no previously published studies where the dosimetric impact on the target and organs at risk (OARs) of both intrafraction prostate motion and interfraction anatomical changes was investigated together in dose-escalated linac-based SBRT. …”
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  13. 2413
    “…For each patient, we examined 910 candidate dosimetric features including maximum dose, volumes of each organ [CTV, organs at risk (OARs)], V100%, and other granular volumetric/dosimetric indices at varying volumetric/dosimetric values from the entire DVH as well as ADT use to model and predict toxicity from SBRT. …”
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  14. 2414
    “…Decision making quality was evaluated on a per-case and per-round level using the MTB-MODe and MDT-OARS tools, respectively. RESULTS: There were a total of 149 cases and 23 MCCs observed in the before phase and 260 cases and 35 MCCs observed in the after phase. …”
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  15. 2415
  16. 2416
    “…Intensity‐modulated radiotherapy with tailored PTV expansion based on inter‐fractional CTV displacement had dosimetrical advantages over those with PTV(0.5) or those with PTV(0.7) owing to its perfect PTV dose coverage and better OARs sparing(especially of heart and left lung). …”
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  17. 2417
    “…Tumor control probability (TCP) of all three SRS plans was greater than 98%, and normal tissue complication probability (NTCP) of all organs at risk (OARs) was below 0.01%. GK and Cone-VMAT resulted in superior TCP and NTCP of the normal brain tissue than MLC-CRT. …”
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  18. 2418
    “…CONCLUSION: The NRG-2019 project did not increase the dose of organs at risk (OARs) radiation. This is a significant finding that further lays the groundwork for the application of the NRG-2019 consensus in the treatment of patients with HGGs. …”
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  19. 2419
    “…The mean relative difference were within 1% for the target volumes (CTV and PTV) and 2% for the OARs. CONCLUSION: This study demonstrated the feasibility of generating clinically acceptable an artificial intelligence-based pseudo CT for low field MR in pelvis with consistent image accuracy and dosimetric results.…”
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  20. 2420
    “…As for the NTCP, our data point out that IMRT is not always likely to significantly increase the NTCP to OARs. CONCLUSIONS: In HL male patients IMRT seems feasible and accurate while for women HL patients IMRT should be used with caution.…”
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