نتایج جستجو برای: conventional imaging

تعداد نتایج: 695223  

Journal: :iranian journal of nuclear medicine 0
afshin akbarzadeh research center for molecular and cellular imaging, tehran university of medical sciences, tehran, iran valiallah saba radiation research center, faculty of paramedicine, aja university of medical sciences, tehran, iran mohammad reza ay department of medical physics and biomedical engineering, tehran university of medical sciences, tehran, iran

introduction:surgeosight is a dedicated intra-operative hand-held gamma camera designed and manufactured by our team to be used for lymphoscintigraphy. although conventional gamma cameras are widely used, they lack the capability of the sentinel lymph node (sln) imaging in the operation room. like conventional gamma cameras it is necessary to calibrate surgeosight for linearity distortion, ener...

Journal: :journal of medical signals and sensors 0
maryam ramezani alireza karimian payman moallem

in order to distinguish between benign and malignant types of pigmented skin lesions, computerized procedures have been developed for images taken by different equipment that the most available one of them is conventional digital cameras. in this research, a new procedure to detect malignant melanoma from benign pigmented lesions using macroscopic images is presented. the images are taken by co...

Journal: :Optics express 2012
R Mehfuz F A Chowdhury K J Chau

We develop a technique that now enables surface plasmon polaritons (SPPs) coupled by nano-patterned slits in a metal film to be detected using conventional optical microscopy with standard objective lenses. The crux of this method is an ultra-thin polymer layer on the metal surface, whose thickness can be varied over a nanoscale range to enable controllable tuning of the SPP momentum. At an opt...

Journal: :Journal of the American College of Radiology : JACR 2013
Bruce J Hillman Bhavik J Pandya

Journal: :AJNR. American journal of neuroradiology 2004
R Nuri Sener

BACKGROUND AND PURPOSE Neuroaxonal dystrophy is a rare progressive disorder of childhood characterized by mental deterioration and seizures. The diffusion-weighted and conventional MR imaging findings are reported for six cases. METHODS Six patients aged 19 months to 9 years with proved neuroaxonal dystrophy (one with the infantile form, five juvenile forms) underwent imaging at 1.5 T. Echo-p...

2012
Kazuo Yamagata Daisaku Iwamoto Yukari Terashita Chong Li Sayaka Wakayama Yoko Hayashi-Takanaka Hiroshi Kimura Kazuhiro Saeki Teruhiko Wakayama

Technologies for vitally labeling cells with fluorescent dyes have advanced remarkably. However, to excite fluorescent dyes currently requires powerful illumination, which can cause phototoxic damage to the cells and increases the cost of microscopy. We have developed a filter system to excite fluorescent dyes using a conventional transmission microscope equipped with a halogen lamp. This metho...

Journal: :رادار 0
محمد نوری پرکستانی مرتضی کازرونی حمید حیدر

in this paper, the range doppler algorithm (rda) for synthetic aperture radar moving on a ballistic trajectory is presented. the 3-dimension acceleration and non-uniform trajectory cause decreases in efficiency of conventional imaging algorithms. in this paper, the analytical expression for the 2-d signal spectrum for ballistic trajectory using taylor series expansion and series reversion is de...

Ahmad Bitarafan Rajabi Faraz Kalantari, Fereidoon Rastgoo Hadi Malek Hossein Rajabi, Kourosh Gorji Nahid Yaghoobi Seyed Hasan Firoozabadi

  Introduction: Poor sensitivity and poor signal to noise ratio because of low injected thallium dose and presence of scattered photons are the main problems in using thallium in scintigraphic imaging of the heart. Scattered photons are the main cause of degrading the contrast and resolution in SPECT imaging that result in error in quantification. Thallium decay is ve...

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