نتایج جستجو برای: based phantom

تعداد نتایج: 2946802  

Introduction: Long-term teletherapy program is not suitable for old and working patients and those living in areas where little access to primary health care is available. Accelerated partial breast irradiation (APBI) using high dose rate (HDR) brachytherapy is an appropriate alternative for these patients due to its limited number of fractions. The AccuBoost is a system for delivering APBI. Th...

2017
Mi-Sun Kim Ju-Young Kim Si-Cheol Noh Heung-Ho Choi

The ultrasonic treatment of varicose veins uses high-intensity focused ultrasound, in which a blood vessel is contracted by converting acoustic energy into thermal energy. In this study, we propose a phantom of varicose veins that can be applied for the efficient evaluation of ultrasonic treatment in varicose veins. The proposed phantom consisted of glycerol base tissue equivalent material, ves...

2014
Hossein Ragheb Neil A. Thacker David M. Morris Alan Jackson

The aim of this document is to define the quality assurance (QA) methods for scanners using the ice-water phantom and the corresponding software developed within the IMI QuIC-ConCePT project, for the upcoming ‘BOS2’ trials. The outlined methods are what we consider to constitute the best use of currently available data following our recent papers [1] [2] in which we studied ADC (apparent diffus...

2016
Jae-Myung Shin Chena Lee Jo-Eun Kim Kyung-Hoe Huh Won-Jin Yi Min-Suk Heo Soon-Chul Choi Sam-Sun Lee

PURPOSE The purpose of this study was to investigate appropriate contrast reference values (CRVs) by comparing the contrast in phantom and clinical images. MATERIALS AND METHODS Phantom contrast was measured using two methods: (1) counting the number of visible pits of different depths in an aluminum plate, and (2) obtaining the contrast-to-noise ratio (CNR) for 5 tissue-equivalent materials ...

2007
JONATHAN C. PETTIBONE DOUGLAS H. WEDELL

Phantom decoys are alternatives that asymmetrically dominate a targeted alternative and yet lead to increased selection of the target when the decoy is declared to be unavailable. This effect is difficult to explain within most standard theoretical accounts of decoy effects. The current experiments tested between three explanations of this effect: (1) the relative advantage model based on loss ...

1998
J. DANIEL CHRISTENSEN MARK HOVEY

In the first part, we determine conditions on spectra X and Y under which either every map from X to Y is phantom, or no nonzero maps are. We also address the question of whether such all or nothing behaviour is preserved when X is replaced with V ∧ X for V finite. In the second part, we introduce chromatic phantom maps. A map is n-phantom if it is null when restricted to finite spectra of type...

Journal: :Journal of neurology, neurosurgery, and psychiatry 2000
L H Lu A M Barrett J E Cibula R L Gilmore E B Fennell K M Heilman

OBJECTIVE Patients who misperceive that they are moving their paralysed arm (phantom movements) may not recognise its weakness. Therefore, the relation between phantom limb movements and anosognosia for hemiplegia during selective right hemispheric anaesthesia (the Wada test) was examined. METHODS Nine patients with intractable epilepsy underwent the Wada test. During the right hemispheric in...

2013
M. Frydrysiak

In the paper the research of flat textile products for use as electrodes was presented. Material’s resistance measurements were carried out to determine the suitability of the textiles. Based on the received results of studies different types of textile electrodes were designed. Textile electrodes tests were carried out on human phantoms. The electro-conductive properties of human forearm phant...

2011
Yongsook C Lee Gary D Fullerton Cristel Baiu Margaret G Lescrenier Beth A Goins

BACKGROUND Evaluation of changes in tumor size from images acquired by ultrasound (US), computed tomography (CT) or magnetic resonance imaging (MRI) is a common measure of cancer chemotherapy efficacy. Tumor size measurement based on either the World Health Organization (WHO) criteria or the Response Evaluation Criteria in Solid Tumors (RECIST) is the only imaging biomarker for anti-cancer drug...

2015
Harley H. L. Chan Jeffrey H. Siewerdsen Allan Vescan Michael J. Daly Eitan Prisman Jonathan C. Irish David Warburton

The aim of this study was to demonstrate the role of advanced fabrication technology across a broad spectrum of head and neck surgical procedures, including applications in endoscopic sinus surgery, skull base surgery, and maxillofacial reconstruction. The initial case studies demonstrated three applications of rapid prototyping technology are in head and neck surgery: i) a mono-material parana...

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