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Mostrando 481 - 500 Resultados de 2,457 Para Buscar '"Oar"', tiempo de consulta: 0.15s Limitar resultados
  1. 481
    “…There was no appreciable difference observed in Organ at risk (OAR) doses. The mean NTID and low dose volume were significantly low with 6MV RA UFB as compared to FB. 6MV RA UFB required a 35% higher MU than with the 6MV RA plan (p<0.05). …”
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    Treatment Planning With Unflattened as Compared to Flattened Beams for Bilateral Carcinoma of the Breast
  2. 482
    “…Using whole genome sequencing of two half-sib affected lambs, their sire, and their two normal dams, a heterozygous C>T transition at OAR10:77593415 (Oar_v3.1) in exon 1 of the fibroblast growth factor 14 (FGF14) gene (c.46C>T) was identified. …”
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    Familial episodic ataxia in lambs is potentially associated with a mutation in the fibroblast growth factor 14 (FGF14) gene
  3. 483
    “…In addition, the odds of mortality among those receiving OAR were higher for females than males (adjusted OR, 1.14; 95% CI: 1.00–1.31). …”
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    Persisting disparities between sexes in outcomes of ruptured abdominal aortic aneurysm hospitalizations
  4. 484
    “…D(max) and D(mean) of OARs were decreased by 0.3% to 25.7% and by 1.0% to 46.3%, respectively. …”
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    Evaluation of dosimetric advantages of using patient‐specific aperture system with intensity‐modulated proton therapy for the shallow depth tumor
  5. 485
    “…Minimizing the effect on an organ at risk (OAR) is important in radiotherapy. The biologically effective dose (BED) model is widely used to estimate the effect on the tumor or on the OAR, for a fixed value of dose. …”
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    Comparison of the average surviving fraction model with the integral biologically effective dose model for an optimal irradiation scheme
  6. 486
    “…The dose–response curves of each target and organ at risk (OAR), as well as the corresponding P(+) curves, were calculated. …”
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    Dosimetric and Radiobiological Evaluation of Patient Setup Accuracy in Head-and-neck Radiotherapy Using Daily Computed Tomography-on-rails-based Corrections
  7. 487
    “…PURPOSE: The objective of this study was to compare dosimetric characteristics of three-dimensional conformal radiotherapy (3D-CRT) and two types of intensity-modulated radiotherapy (IMRT) which are step-and-shoot intensity modulated radiotherapy (s-IMRT) and modulated arc therapy (mARC) for thoracic esophageal cancer and analyze whether IMRT could reduce organ-at-risk (OAR) dose. MATERIALS AND METHODS: We performed 3D-CRT, s-IMRT, and mARC planning for ten patients with thoracic esophageal cancer. …”
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    Dosimetric comparison between modulated arc therapy and static intensity modulated radiotherapy in thoracic esophageal cancer: a single institutional experience
  8. 488
    “…Target volume (TV) and organ at risk (OAR) were delineated as per Radiation Therapy Oncology Group (RTOG) cancer guidelines. …”
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    Comparative Evaluation of a 6MV Flattened Beam and a Flattening Filter Free Beam for Carcinoma of Cervix – IMRT Planning Study
  9. 489
    “…CONCLUSIONS: A fractional OAR mean dose of 1.1 Gy seems a reasonable cutoff for separating no or mild pain from moderate to severe esophageal and throat pain. …”
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    Predictors of acute throat or esophageal patient reported pain during radiation therapy for head and neck cancer
  10. 490
    por Rangarajan, Ramya
    Publicado 2018
    “…The target volumes and organs at risk (OAR) were contoured as per the Groupe Européen de Curiethérapie European Society of Therapeutic Radiation Oncology guidelines. …”
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    Incidence of Suboptimal Applicator Placement and the Resulting Dosimetric Impact in Image-Based Intracavitary Brachytherapy
  11. 491
    “…RESULTS: The clinical target volume-PTV/OAR-planning risk volume margins were less than 5 mm for C1(ROI)-C4(ROI), mandible (M(ROI)), and sphenoid sinus (S(ROI)) with respect to PTV(ROI). …”
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    Analysis of which local set-up errors can be covered by a 5-mm margin for cone beam CT-guided radiotherapy for nasopharyngeal carcinoma
  12. 492
    “…PRT lowered doses to nearly every OAR, most notably the optical system and several contralateral structures (subventricular zone, thalamus, hippocampus). …”
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    Dosimetric Comparison of Proton Radiation Therapy, Volumetric Modulated Arc Therapy, and Three-Dimensional Conformal Radiotherapy Based on Intracranial Tumor Location
  13. 493
    por Ito, Hiroya
    Publicado 2018
    “…When weight loss occurs during treatment, the external body contour changes from that indicated during initial planning, causing changes in dose distribution to the target tumor regions and organs at risk (OARs). This study aimed to examine the dose changes to both the target regions and OARs, based on the dose-volume histogram (DVH). …”
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    Effect of body thickness on helical and direct treatment delivery modes: a phantom study
  14. 494
    “…In 13 patients, computerized tomography (CT) scans were taken pre‐ and post‐SpaceOAR© implant. A prescription of 60 Gy in 20 fractions was planned on both scans. …”
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    Maximizing rectal dose sparing with hydrogel: A retrospective planning study
  15. 495
    “…In addition to give a high enough dose to a tumor, it is also important to spare nearby healthy organs [organs at risk (OAR)]. Dose plans are commonly evaluated using the so‐called dosimetric indices; for the tumor, the portion of the structure that receives a sufficiently high dose is calculated, while for OAR it is instead the portion of the structure that receives a sufficiently low dose that is of interest. …”
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    An extended dose–volume model in high dose‐rate brachytherapy – Using mean‐tail‐dose to reduce tumor underdosage
  16. 496
    “…When 12 microsatellite loci are compared, the OarFCB20 locus showed the highest level of genetic variability. …”
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    Genetic diversity of different breeds of Kazakh sheep using microsatellite analysis
  17. 497
    “…Additionally, HT also provided more homogeneous dose distribution (p < 0.001) and numerically lower doses received by most OARs, but again both rotational techniques were successful in keeping the OAR doses below the universally accepted limits. …”
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    Dosimetric Comparison of Lung-Sparing Radiation Therapy between Volumetric Arc Therapy and Helical Tomotherapy for Unresectable Malignant Pleural Mesothelioma
  18. 498
    por Tsang, Yat Man, Hoskin, Peter
    Publicado 2017
    “…No significant differences were found in OAR DVHs between patients with and without GI and GU toxicities. …”
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    The impact of bladder preparation protocols on post treatment toxicity in radiotherapy for localised prostate cancer patients
  19. 499
    “…Objective: To investigate predictors of acute kidney injury (AKI) following open aortic repair (OAR) requiring suprarenal clamping. Methods: The study included 833 nonhemodialysis patients who had undergone elective OAR (with suprarenal clamping, n=73; with infrarenal clamping, n=760). …”
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    Acute Kidney Injury Following Elective Open Aortic Repair with Suprarenal Clamping
  20. 500
    “…Assessment of dose received by OAR’s therefore becomes crucial for the estimation of radiation toxicities in HDR brachytherapy. …”
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    Rectal and Bladder Dose Measurements in the Intracavitary Applications of Cervical Cancer Treatment with HDR Afterloading System: Comparison of TPS Data with MOSFET Detector
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