نتایج جستجو برای: radiologic phantom

تعداد نتایج: 30796  

2014
Vyacheslav A. Shurshakov Raisa V. Tolochek Ivan S. Kartsev Vladislav M. Petrov Igor V. Nikolaev Svetlana I. Moskalyova Vladimir I. Lyagushin

Space radiation is known to be key hazard of manned space mission. To estimate accurately radiation health risk detailed study of dose distribution inside human body by means of human phantom is conducted. In the space experiment MATROSHKA-R, the tissue-equivalent spherical phantom (32 kg mass, 35 cm diameter and 10 cm central spherical cave) made in Russia has been used on board the ISS for mo...

ژورنال: پژوهش در پزشکی 2018

Background: Average glandular dose (AGD), entrance skin air kerma (ESAK) and normalized glandular dose (DgN) are the main dosimetric quantities in mammography. Breast tissue composition is one of the factors affecting on DgN values. In this study both homogeneous and heterogeneous breast tissue is assumed and its impact on DgN values are evaluated. Methods: Homogeneous breast phantom with diffe...

Journal: :Cureus 2023

Choledochodoudenal fistula is an uncommon bilio-enteric with clinical presentation ranging from having no symptoms to frank cholangitis. The causes of choledochodoudenal are multiple, bile duct stones being the most common. Duodenal ulcer rarely source fistula. Clinical diagnosis defies acumen, and high-quality imaging including endoscopic or radiologic required for confirmation. Management not...

Journal: :Physical Review Materials 2021

MnPdGa, a compound crystallizing in the ${\mathrm{Ni}}_{2}\mathrm{In}$ structure, is material displaying magnetic ordering near room temperature and potential ambient-temperature magnetocaloric. Screening based on electronic structure calculations suggest that MnPdGa may exhibit high magnetocaloric figure of merit due to its strong magnetostructural coupling. Here we report preparation employ h...

Journal: :Physical review 2022

We report the magneto-optic Kerr effect (MOKE) angle of Au magnetically excited by spin accumulation. perform time-resolved polar MOKE measurements on Au/Co heterostructures. In our experiment, ultrafast optical excitation Co drives accumulation into an adjacent layer. The accumulation, together with spin-orbit coupling, leads to nonzero terms in off-diagonal conductivity tensor Au, which we me...

Journal: :Kaku igaku. The Japanese journal of nuclear medicine 2007
Akihiro Takaki Satomi Teraoka Tsutomu Soma Tomonori Murakami Akihiro Kojima Masanori Matsumoto Kenya Murase

In order to perform experimental measurements for evaluation of imaging device's performance, data acquisition technique, and clinical images on scintigraphic imaging, many kinds of phantoms are employed. However, since these materials are acrylic and plastic, the thickness and quality of those materials cause attenuation and scatter in itself. We developed a paper sheet phantom sealed with a p...

2017
J. Andoh M. Diers C. Milde C. Frobel D. Kleinböhl H. Flor

Previous work showed the existence of changes in the topographic organization within the somatosensory cortex (SI) in amputees with phantom limb pain, however, the link between nonpainful phantom sensations such as cramping or tingling or the percept of the limb and cortical changes is less clear. We used functional magnetic resonance imaging (fMRI) in a highly selective group of limb amputees ...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1997
N Birbaumer W Lutzenberger P Montoya W Larbig K Unertl S Töpfner W Grodd E Taub H Flor

The causes underlying phantom limb pain are still unknown. Recent studies on the consequences of nervous system damage in animals and humans reported substantial reorganization of primary somatosensory cortex subsequent to amputation, and one study showed that cortical reorganization is positively correlated with phantom limb pain. This paper examined the hypothesis of a functional relationship...

2017
Shu Imaizumi Tomohisa Asai Shinichi Koyama

Most amputees experience phantom limb, whereby they feel that the amputated limb is still present. In some cases, these experiences include pain that can be alleviated by "mirror therapy." Mirror therapy consists of superimposing a mirrored image of the moving intact limb onto the phantom limb. This therapy provides a closed loop between the motor command to the amputated limb and its predicted...

2016
Mehmet Selim Nural

The diagnosis is primarily based on clinical criteria because there are no specific diagnostic laboratory tests available and because of the non-specificity of the histopathologic findings. The multiorgan involvement of Behcet’s disease can be characterized. Here we will describe the radiological findings consisting of pulmonary, cardiovascular, neurologic, and abdominal involvement in Behcet’s...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید