نتایج جستجو برای: planning mean 33750
تعداد نتایج: 777429 فیلتر نتایج به سال:
PURPOSE To investigate the incorporation of functional lung image-derived low-attenuation area (LAA) based on 4-dimensional computed tomography (4D-CT) in volumetric modulated arc therapy (VMAT) planning for patients with malignant pleural mesothelioma (MPM) after extrapleural pneumonectomy. METHODS AND MATERIALS Twelve patients with MPM after extrapleural pneumonectomy were included. The pri...
OBJECTIVES To compare treatment plans for helical tomotherapy (TOMO), volumetric modulated arc therapy (VMAT) and intensity-modulated radiotherapy (IMRT) for locally advanced rectal cancer (LARC). MATERIALS AND METHODS This retrospective study from December 2010 to June 2013 included 20 patients with LARC who received neoadjuvant concurrent chemoradiotherapy (CCRT) with radiation doses of gre...
در این پایان نامه به مسئله ردگیری و بیان الگوریتمی جهت ردیابی اهداف پرنده پرداخته می شود. امروزه با توجه به پیشرفت روزافزون تکنولوژی ساخت هواپیماها و همچنین مجهز شدن آنها به سلاح های ضد رادار مانند موشک های ضد تشعشع، استفاده از ابزار و روش های غیر فعال جهت ردیابی اهداف هوایی مورد توجه قرار گرفته است، در این میان دوربین مادون قرمز به عنوان یک عنصر غیر فعال و تصاویر بدست آمده از آن در ردگیری اهدا...
Stereotactic radiosurgery (SRS) is the accurate, conformal delivery of high-dose radiation to well-defined targets while minimizing normal structure doses via steep dose gradients. While inverse treatment planning (ITP) with computerized optimization algorithms are routine, many aspects of the planning process remain user-dependent. We performed an international, multi-institutional benchmark t...
The implementation of tissue inhomogeneity correction in image-based treatment planning will improve the accuracy of radiation dose calculations for patients undergoing external-beam radiotherapy. Before the tissue inhomogeneity correction can be applied, the relationship between the computed tomography (CT) value and density must be established. This tissue characterization relationship allows...
for all $a,b>0$, the following two optimal inequalities are presented: $h^{alpha}(a,b)l^{1-alpha}(a,b)geq m_{frac{1-4alpha}{3}}(a,b)$ for $alphain[frac{1}{4},1)$, and $ h^{alpha}(a,b)l^{1-alpha}(a,b)leq m_{frac{1-4alpha}{3}}(a,b)$ for $alphain(0,frac{3sqrt{5}-5}{40}]$. here, $h(a,b)$, $l(a,b)$, and $m_p(a,b)$ denote the harmonic, logarithmic, and power means of order $p$ of two positive numbers...
Stresses present in different forms and call for subtly different responses. Conventional modes of planning seek to render such stressors manageable by administering them discretely. This has generally resulted in a segregated approach to spatial planning wherein functional delineations have become institutionally ‘sedimented’ within planning authorities (flood risk management, open space deman...
Background: Presentation of course plan were advised but presentations of lesson plans were useful too. These items can introduce the course and lessons of each session to students. The objective of this study was the determination of the effects of educational planning on learning of occupational diseases. Methods: This study was a semi experimental study which was conducted by using the cur...
0
Background: Strategy formulation and implementation in healthcare is challenging. This study aimed to examine strategic planning challenges in Tehran province hospitals. Methods: This study was a cross-sectional study which conducted in 2016. 93 hospital managers participated in the study using census sampling. Data were collected using self-administrated questionnaire with a reliability of 0....
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید