نتایج جستجو برای: compact pixelated gamma camera

تعداد نتایج: 267766  

Journal: :iranian journal of nuclear medicine 0
alireza sadremomtaz department of physics, faculty of science, university of guilan, rasht, iran zeinab telikani department of physics, faculty of science, university of guilan, rasht, iran

introduction: image quality and accuracy of in vivo activity quantification in spect are affected by collimator penetration and scatter components, especially in high energy imaging. these phenomena highly depend on the collimator characteristic and photon energy. the presence of penetrated and scattered photons from collimator in spect images degrades spatial resolution, contrast and image qua...

Alireza Sadremomtaz, Zeinab Telikani

Introduction: Image quality and accuracy of in vivo activity quantification in SPECT are affected by collimator penetration and scatter components, especially in high energy imaging. These phenomena highly depend on the collimator characteristic and photon energy. The presence of penetrated and scattered photons from collimator in SPECT images degrades spatial resolution, contr...

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...

2001
Maria Nerina Cinti Roberto Pani Rosanna Pellegrini Claudio Bonifazzi Raffaele Scafè Giuseppe De Vincentis Franco Garibaldi Francesco Cusanno Renato Campanini Nico Lanconelli Alessandro Riccardi

A new gamma camera dedicated to scintimammography (single photon emission mammography—SPEM) now has a full-breast field of view. One can clinically examine a mildly compressed breast with a cranio-caudal-like projection as one would in X-ray mammography. This camera is based on pixelated scintillation arrays and position sensitive photomultiplier tubes. By reducing the collimator-tumor distance...

2011
Neal J. Brock Bradley T. Kimbrough James E. Millerd

A pixel-level micropolarizer array bonded to a scientific camera has been developed for use in commercial dynamic interferometers. The pixelated array includes the 0, 45, 90, and, 135 degree polarization orientations. Micropolarizer arrays with elements as small as 7.4 microns and array sizes as large 4 Mega-pixels have been fabricated for use across the visible spectrum. The pixelated polariza...

2006
H. Nishimura K. Hattori S. Kabuki H. Kubo K. Miuchi T. Nagayoshi Y. Okada R. Orito A. Takeda T. Tanimori K. Ueno

We have developed a position-sensitive scintillation camera with a large area absorber for use as an advanced Compton gamma-ray camera. At first we tested GSO(Ce) crystals. We compared light output from the GSO(Ce) crystals under various conditions: the method of surface polishing, the concentration of Ce, and co-doping Zr. As a result, we chose the GSO(Ce) crystals doped with only 0.5 mol% Ce,...

2014
M. Kolstein G. Ariño M. Chmeissani G. De Lorenzo

The Voxel Imaging PET (VIP) Pathfinder project intends to show the advantages of using pixelated semiconductor technology for nuclear medicine applications to achieve an improved image reconstruction without efficiency loss. It proposes designs for Positron Emission Tomography (PET), Positron Emission Mammography (PEM) and Compton gamma camera detectors with a large number of signal channels (o...

2015
Matthew. P. Edgar Graham M. Gibson Richard W. Bowman Baoqing Sun Neal Radwell Kevin J. Mitchell Stephen S. Welsh Miles J. Padgett

Conventional cameras rely upon a pixelated sensor to provide spatial resolution. An alternative approach replaces the sensor with a pixelated transmission mask encoded with a series of binary patterns. Combining knowledge of the series of patterns and the associated filtered intensities, measured by single-pixel detectors, allows an image to be deduced through data inversion. In this work we ex...

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...

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