نتایج جستجو برای: organ peripheral dose

تعداد نتایج: 574429  

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2012
Katherine K Matthay Brian Weiss Judith G Villablanca John M Maris Gregory A Yanik Steven G Dubois James Stubbs Susan Groshen Denice Tsao-Wei Randall Hawkins Hollie Jackson Fariba Goodarzian Heike Daldrup-Link Ashok Panigrahy Alexander Towbin Hiroyuki Shimada John Barrett Norman Lafrance John Babich

UNLABELLED (131)I-metaiodobenzylguanidine (MIBG) is specifically taken up in neuroblastoma, with a response rate of 20%-37% in relapsed disease. Nonradioactive carrier MIBG molecules inhibit uptake of (131)I-MIBG, theoretically resulting in less tumor radiation and increased risk of cardiovascular toxicity. Our aim was to establish the maximum tolerated dose of no-carrier-added (NCA) (131)I-MIB...

Journal: :Journal of medical imaging 2016
Taly Gilat Schmidt Adam S Wang Thomas Coradi Benjamin Haas Josh Star-Lack

The overall goal of this work is to develop a rapid, accurate, and automated software tool to estimate patient-specific organ doses from computed tomography (CT) scans using simulations to generate dose maps combined with automated segmentation algorithms. This work quantified the accuracy of organ dose estimates obtained by an automated segmentation algorithm. We hypothesized that the autosegm...

2016
Anna Kelaranta

Organ dose is the absorbed radiation energy from ionizing radiation to an organ, divided by the organ mass. Organ doses of a patient cannot be measured directly in the patient, but their determination requires dose measurements in anthropomorphic patient models i.e. phantoms or Monte Carlo simulations. Monte Carlo simulations can be performed for example by using computational phantoms or patie...

موحد, منصور, حکمت, سپیده, شرفی, علی‌اکبر, مرتضی‌زاده, توحید,

    Background: In this survey the absorbed dose by kidneys, bladder, liver and ovaries with 99mTc-EC (99mTc Ethylene dicysteine) renal scintigraphy was measured and compared with the absorbed dose from 99mTc-DTPA (99mTc - Dietheylne Triamine Penta-Acid), which often is used in renal scintigraphy.Methods: In this applicable study, we used a water phantom with geometrical sizes similar to that o...

Journal: :journal of biomedical physics and engineering 0
b farhood tehran university of medical science m t bahreyni toossi medical physics department, faculty of medicine, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه تهران (tehran university) h vosoughi medical physics department, faculty of medicine, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) s khademi medical physics research center,mashhad university of medical sciences,mashhad,iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) c knaup comprehensive cancer centers of nevada, las vegas, nevada, usaسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences)

background: breast cancer is the most frequently diagnosed cancer and the leading global cause of cancer death among women worldwide. radiotherapy plays a significant role in treatment of breast cancer and reduces locoregional recurrence and eventually improves survival. the treatment fields applied for breast cancer treatment include: tangential, axillary, supraclavicular and internal mammary ...

Parviz Parvaresh Seyedeh fatemeh Khatani Zahra sadat Esmati

Introduction: Nuclear medicine techniques have been widely employed in the assessment of gastroesophageal dysfunction. Gastroesophageal reflux (GER) is a common, self-limited process in infants and children that usually resolves at 12 to 18 months of age. Clinical management of GER includes conservative treatment, thickened feedings, positional therapy and parental reassurance. On the other han...

1998
Raymond J. Carroll Andre Bouville

In situations involving radiation exposure and acute inhalation exposure of chemicals, among others, actual exposure to a target organ is not available. Instead, interdisciplinary teams build complex, often differential equation–based models relating a measure of exposure to actual exposure at a target organ. These complex models are themselves filled with uncertainties, e.g., in transition rat...

Journal: :Open Forum Infectious Diseases 2022

Abstract Background Metronidazole is a widely used antibiotic to treat anaerobic and protozoal infections. However, neurologic adverse events associated with metronidazole have been reported in case series reports. Previous publications implicated that long-term usage cumulative dose are risk factors for this event. Still, little known about the factor of metronidazole-associated events. Theref...

2016
Desmond I. Bannon Marc A. Williams Donald Smith Mir Ahamed Hossain

In vitro assays have become a mainstay of modern approaches to toxicology with the promise of replacing or reducing the number of in vivo tests required to establish benchmark doses, as well as increasing mechanistic understanding. However, matching target dose to target organ is an often overlooked aspect of in vitro assays, and the calibration of in vitro exposure against in vivo benchmark do...

Journal: :Physics in medicine and biology 2010
Eva Rutkowska Colin Baker Alan Nahum

A radiobiologically based 3D model of normal tissue has been developed in which complications are generated when 'irradiated'. The aim is to provide insight into the connection between dose-distribution characteristics, different organ architectures and complication rates beyond that obtainable with simple DVH-based analytical NTCP models. In this model the organ consists of a large number of f...

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