نتایج جستجو برای: hdr
تعداد نتایج: 2738 فیلتر نتایج به سال:
Background and purpose: Dose calculations in trachea HDR brachytherapy treatment planning systems are greatly based on TG-43 protocol in which, all materials including air inside trachea are treated the same as water. The aim of this study was to survey the effect of air on dose calculations of Flexiplan treatment planning system in trachea HDR brachytherapy. Materials and methods: To ev...
High dynamic range (HDR) image generation and display technologies are becoming increasingly popular in various applications. A standard and commonly used approach to obtain an HDR image is the multiple exposures fusion technique which consists of combining multiple images of the same scene with varying exposure times. However, if the scene is not static during the sequence acquisition, moving ...
There are a number of modern myths about High Dynamic Range (HDR) imaging. There have been claims that multiple-exposure techniques can accurately record scene luminances over a dynamic range of more than a million to one. There are assertions that human appearance tracks the same range. The most common myth is that HDR imaging accurately records and reproduces actual scene radiances. Regardles...
This paper proposes the first end-to-end deep framework for high dynamic range (HDR) imaging of dynamic scenes with large-scale foreground motions. In state-of-the-art deep HDR imaging such as [13], the problem is formulated as an image composition problem, by first aligning input images using optical flows which are still error-prone due to occlusion and large motions. In our end-to-end approa...
High Dynamic Range (HDR) imaging is one of the technologies that are changing photo, TV, and film industries. The popularity and full public adoption of HDR content is however hindered by the lack of standards in evaluation of quality, file formats, and compression, as well as large legacy base of Low Dynamic Range (LDR) displays that are unable to render HDR. Many tone-mapping operators, aimin...
Treatment of cervical cancer includes combination of external beam radiation therapy (EBRT) and brachytherapy (BRT). Traditionally, coronal images displaying dose distribution from a ring and tandem (R&T) implant aid in construction of parametrial boost fields. This research aimed to evaluate a method of shaping parametrial fields utilizing contours created from the high-dose-rate (HDR) BRT dos...
Let Vn be the SL2-module of binary forms of degree n and let V = Vn1 ⊕ . . . ⊕ Vnp . We consider the algebra R = O(V )2 of polynomial functions on V invariant under the action of SL2. The measure of the intricacy of these algebras is the length of their chains of syzygies, called homological dimension hdR. Popov gave in 1983 a classi cation of the cases in which hdR ≤ 10 for a single binary for...
In the last few years, researchers in the field of High Dynamic Range (HDR) Imaging have focused on providing tools for expanding Low Dynamic Range (LDR) content for the generation of HDR images due to the growing popularity of HDR in applications, such as photography and rendering via Image-Based Lighting, and the imminent arrival of HDR displays to the consumer market. LDR content expansion i...
BACKGROUND Traditionally, low dose rate (LDR) brachytherapy has been used as a standard modality in the treatment of patients with carcinoma of the uterine cervix. The purpose of this work was to evaluate the effects of high dose rate (HDR) brachytherapy on patients with adenocarcinoma of the uterine cervix and to compare them with the effects of LDR brachytherapy. METHODS From January 1971 t...
Purpose Intraoperative radiation therapy (IORT), delivered by intraoperative electron beam (IOERT) or high-dose-rate brachytherapy (HDR-IORT), may reduce the local recurrence rate in patients with locally advanced and recurrent rectal cancer (LARC LRRC, respectively). The aim of this study was to compare oncological outcomes between both IORT modalities LARC LRRC who underwent a microscopic irr...
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