Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"Equivalent dose"”.
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Reduction in daily hydrocortisone dose improves bone health in primary adrenal insufficiency
… glucocorticoid (GC) replacement therapy. GC doses used for replacement therapy in these diseases are much lower than GC doses used for immunosuppressive therapy. However, current daily GC doses are still higher than the reported adrenal cortisol production rate. This GC excess could result in …
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Simulating Space Radiation for Testing Shielding Material Effectiveness
… transport codes must be improved to predict dose deposition inside the vehicle. Computer simulations of spacecraft are often used to show the reduction in equivalent dose provided by spacecraft structures. However, published research has shown that increasing shielding does not always result …
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Investigation of the bubble detector response to high LET space radiation
… detectors (SBD) have been used to evaluate the equivalent dose due to neutrons in various space missions aboard the International Space Station. Protons and other heavy charged particles are a significant component of the high LET radiation field and also contribute to the SBD measurements. The …
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Estimation of risk associated to peripheral dose in patients undergoing radiotherapy treatment
… This fact makes relevant to consider all the dose delivered to the patient and, thus, it is necessary to include the peripheral dose. In this work we focused on the neutron radiation generated by high energy (i.e. > 10 MV) photon radiotherapy beams given that the accurate determination of the …
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ΣΥΜΒΟΛΗ ΤΗΣ ΠΟΣΟΤΙΚΗΣ ΥΠΟΛΟΓΙΣΤΙΚΗΣ ΤΟΜΟΓΡΑΦΙΑΣ ΣΤΗ ΜΕΛΕΤΗ ΤΟΥ ΜΕΤΑΒΟΛΙΣΜΟΥ ΤΩΝ ΟΣΤΩΝ: ΤΕΧΝΙΚΗ ΚΑΙ ΚΛΙΝΙΚΑ ΑΠΟΤΕΛΕΣΜΑΤΑ
… DOSIMETRES SHOWED THAT THE EFFECTIVE EQUIVALENT DOSE OF THE EXAMINATION IS 370 MSV SERIES OF EXPERIMENTS WITH VARIOUS PHANTOMS, INVESTIGATED THE SOURCES OF ERRORS CONCERNING THE ACCURACY AND THE PRECISION OF THE TECHNIQUE . 618 BMD MEASUREMENTS WERE PERFORMED IN 495 SUBJECTS 219 OF …
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Combined methods and instrumentation for dosimetric monitoring of the large fluence hadron irradiations /
… routine sense is the measurement of the absorbed dose in biological tissues and matter delivered by ionizing radiation or particle beams. Dosimetry is widely applied in the field of medical physics where it is inevitable for assessment of the radiation dose received by personnel and patients. Then …
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Didelių įtėkių hadronų apšvitų dozimetrijos kombinuoti metodai ir įranga /
… routine sense is the measurement of the absorbed dose in biological tissues and matter delivered by ionizing radiation or particle beams. Dosimetry is widely applied in the field of medical physics where it is inevitable for assessment of the radiation dose received by personnel and patients. Then …
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Advancing Radiotherapy Treatment Through Artificial Intelligence-Driven Approaches
… radiotherapy aims to deliver precise radiation doses to specific tumor target volumes while minimizing exposure to surrounding healthy tissues and organs. To achieve precision and high treatment quality, accurate target delineation, streamlined workflows, and timely follow-up are necessary. …
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Novel thermoluminescent dosemeter for the measurement of the eye lens operational dose equivalent in mixed neutron-gamma radiation fields
… Dosimetry, Volume I: Ascertaining Occupational Dose”, reducing the equivalent dose limit for the eye lens of a nuclear energy worker from 150 mSv to 50 mSv in a one-year dosimetry period and to 100 mSv in a five-year dosimetry period, and adding the personal dose equivalent at 3mm soft-tissue …
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Advanced brachytherapy dosimetric considerations
… was investigated with emphasis on evaluations of dose distributions and shielding considerations for both photon- and neutron-emitting radionuclides. Monte Carlo simulation methods were employed to calculate dose distributions for virtual and commercial brachytherapy sources. Radionuclides studied …
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The influence of cisplatin dose variations during concurrent weekly chemo-radiation in stage IIB cervical cancer at Groote Schuur Hospital
… in 50%, and vaginal spread in 43%. Mean total dose to Point A was 83 Gy (range 61-96) linear quadratic equivalent dose to 2 Gy/fraction. Mean overall treatment time (OTT) was 45 days. The average weekly haemoglobin (AWHB) during treatment was 11.6 g/dL (range 8.8-15.5). Blood transfusions …
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National Study of Discontinuation of Long-Term Opioid Therapy Among Veterans
… age of 57.8 years. The median daily morphine equivalent dose was 26 mg and 7% received high-dose therapy (i.e. greater than 100 mg/day morphine-equivalent). At one year after initiation, 7.5% of the LTOT sample had discontinued opioids. Of those who discontinued (20%, N=110,460), the mean time …
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In vivo nitrogen measurement by use of (n,2n) method and PGNAA
… investigations of sensitivity and absorbed dose of the two nitrogen methods are made based on the results of Monte Carlo simulation. Two experimental facilities utilizing the (n,2n) method and the PGNAA method are simulated to assess the suitability and the feasibility of in vivo measurement …
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Direct optimization of 3D dose distributions using collimator rotation
… plan without compromising the quality of the dose distribution. It is also shown that an arrangement of equispaced collimator angles takes full advantage of the flexibility associated with collimator rotation. A study including ten recurring nasopharynx cancer patients is used to evaluate the …
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Investigation of the Pharmacokinetics and Local and Systemic Morbidity of a Gentamicin Impregnated Collagen Sponge Implanted in the Canine Stifle
… GICS were arthroscopically implanted at a dose of 6mg/kg. Pharmacokinetic parameters were modeled using statistical moment analyses. Joint inflammation was measured by synovial fluid cell counts and cytokine concentrations, lameness was measured by force plate asymmetry indices, and renal …
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Application of pharmaceutical technologies to improve the activity of cancer chemotherapeutic agents
… docetaxel formulation was not effective at the dose and dosing frequency tested. Higher drug accumulation in tumor tissues was achieved when the DCX-SLNs were injected intravenously, as compared to the Tween 80-based docetaxel formulation. Gemcitabine (2̕, 2̕-difluorodeoxycytidine, dFdC) is the …
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Clinical importance of autophagy dependency and inhibition in cancer treatment
… data established 60 mg/kg as the human equivalent dose observed in patients based on HCQ exposure. Cellular responses to HCQ were assessed in 2D cell culture, 3D tumor organoids, and in vivo tumor xenografts using autophagy dependent and autophagy independent tumors. Overall, cellular …
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Use of chart review tool and peer feedback to influence physician prescribing of controlled substances
… from the previous 6 months, including morphine equivalent dose (MED) prescribed, indication for treatment, documentation of treatment effectiveness, the Opioid Risk Tool score (ORT score), results from urine drug testing (UDT) and patient violations of the clinic’s controlled substance policy. …
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Evaluation of age differences in locomotor activity following psychostimulant administration in adolescent versus adult mice
… to this idea. Following administration of an equivalent dose of psychostimulant (e.g. cocaine, amphetamine, methamphetamine), adolescent rodents are commonly observed to locomotor stimulate to a lesser magnitude than that of adults. However, recently conflicting reports have been published …
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Inflammatory Proteins, Genetic Variation, and Environmental Influences on Health Care Associated Infection Development in Sepsis
… or greater than one mg/kg of prednisone or equivalent dose), immunosuppressed (AIDS, cancer), or had liver failure (Child Pugh category C or higher). Baseline plasma and buccal swabs were collected. Patients were followed prospectively through their ICU stay (or for a maximum of 28 days) for …
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