نتایج جستجو برای: fat phantom
تعداد نتایج: 136765 فیلتر نتایج به سال:
normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 background: epidemic levels of obesity and overweight in today's world are leading to a higher number of mortality and morbidity, especially due to cardiovascular diseases (cvds). body fat distribution contributes a great amount to atherosclerosis formation and therefore increased cvd incidence. the present study used the ...
In this article, a staircase-shaped ultra-wide band dielectric resonator antenna (DRA) has been used as sensor for the detection of breast tumor by monostatic radar-based microwave imaging (MRMWI). The proposed DRA fractional bandwidth (BW) 98.5% and high peak gain 5.98 dB along with dual polarization behaviour from 5.12 to 8.2 GHz 11.02-13.8 GHz. MRMWI setup, is placed over phantom at distance...
This highly original paper relates the $e\phantom{\rule{0}{0ex}}x\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}c\phantom{\rule{0}{0ex}}t$ $r\phantom{\rule{0}{0ex}}e\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}o\phantom{\rule{0}{0ex}}r\phantom{\rule{0}{0ex}}m\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}l\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}z\phantom{\rule{0}{0ex}}a\phantom{\rule{0...
A population of gliding $C\phantom{\rule{0}{0ex}}h\phantom{\rule{0}{0ex}}l\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}m\phantom{\rule{0}{0ex}}y\phantom{\rule{0}{0ex}}d\phantom{\rule{0}{0ex}}o\phantom{\rule{0}{0ex}}m\phantom{\rule{0}{0ex}}o\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}s$ $r\phantom{\rule{0}{0ex}}e\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}n\phanto...
Introduction: Significant distortion can often be observed in body diffusion weighted images (DWI) using single shot EPI. Distortion is caused by external magnetic field (B0) inhomogeneity. The degree of distortion is proportional to B0. When a precise B0 map is obtained, distortion can be corrected using the B0 map. In this study, we demonstrate that a B0 map obtained using three point-Dixon m...
Brachytherapy is one type of internal radiation therapy where radiation sources, which are usually encapsulated are placed as close as possible to the tumor site inside the patient's body. In this technique, it is important to determine dose distribution around the brachytherapy capsule. Hereby, in this paper, dosimetric parameters of I-125 brachytherapy source model 6711 are estimated accordin...
Objective(s): Breast cancer is a fatal disease and the leading cause of mortality in women. Radiofrequency hyperthermia is an approach to the treatment of cancer cells through increasing their temperature. The present study aimed to investigate breast tumor ablation via radiofrequency hyperthermia in the presence and non-presence states of magnetite nanoparticles and assess the effects of magne...
Introduction: Positive-contrast imaging of super paramagnetic iron oxide (SPIO)labeled cells avoids problems associated with negative contrast such as other signal voids and partial volume effects [1-7]. Many techniques offer 2D imaging with thick slices and long scan times. A fast 3D alternating repetition time (ATR) SSFP [8] method with reliable on-resonant suppression has recently been intro...
background: in myocardial perfusion spect imaging, images are degraded by photon attenuation, the distance-dependent collimator, detector response and photons scatter. filters greatly affect quality of nuclear medicine images materials and methods: a phantom simulating heart left ventricle was built. about 1mci of 99mtc was injected into the phantom. images were taken from this phantom. some fi...
INTRODUCTION Magnitude fitting has been proposed as an alternative to complex data fitting for quantitative chemical shift-encoded water/fat imaging. Advantages of magnitude fitting include the removal of sensitivity to phase errors in the signal (e.g., caused by eddy currents) [1] and suppression of B0 field inhomogeneity effects (i.e., removal of one nonlinear parameter from the signal model)...
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