Results 231 to 240 of about 235,461 (293)
Advanced Intelligent Systems, EarlyView.This study presents a multitask strategy for plastic cleanup with autonomous surface vehicles, combining exploration and cleaning phases. A two‐headed Deep Q‐Network shared by all agents is traineded via multiobjective reinforcement learning, producing a Pareto front of trade‐offs.
Dame Seck +4 more
wiley +1 more source
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Nuclear Medicine Communications, 1995
The purchase of a new gamma camera is a major undertaking and represents a long-term commitment for most nuclear medicine departments. The purpose of tendering for gamma cameras is to assess the best match between the requirements of the clinical department and the equipment available and not necessarily to buy the 'best camera' [1-3]. After many years
C P, Wells, M, Buxton-Thomas
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The purchase of a new gamma camera is a major undertaking and represents a long-term commitment for most nuclear medicine departments. The purpose of tendering for gamma cameras is to assess the best match between the requirements of the clinical department and the equipment available and not necessarily to buy the 'best camera' [1-3]. After many years
C P, Wells, M, Buxton-Thomas
openaire +2 more sources
IEEE Transactions on Nuclear Science, 2012
In this work we present a new compact and high-resolution Anger camera to be used in clinical and research environments where high overall spatial resolution and system compactness are required. The use of Silicon Drift Detectors (SDDs) as scintillator photodetectors, characterized by high quantum efficiency and low electronic noise, is the unique ...
FIORINI, CARLO ETTORE +16 more
openaire +3 more sources
In this work we present a new compact and high-resolution Anger camera to be used in clinical and research environments where high overall spatial resolution and system compactness are required. The use of Silicon Drift Detectors (SDDs) as scintillator photodetectors, characterized by high quantum efficiency and low electronic noise, is the unique ...
FIORINI, CARLO ETTORE +16 more
openaire +3 more sources
Nuclear Medicine Communications, 1995
The installation of a gamma camera is time-consuming and costly and, once installed, the camera position is unlikely to be altered during its working life. Poor choice of camera position therefore has long-term consequences. Additional equipment such as collimators and carts, the operator's workstation and wall-mounted display monitors must also be ...
J M, Penrose +2 more
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The installation of a gamma camera is time-consuming and costly and, once installed, the camera position is unlikely to be altered during its working life. Poor choice of camera position therefore has long-term consequences. Additional equipment such as collimators and carts, the operator's workstation and wall-mounted display monitors must also be ...
J M, Penrose +2 more
openaire +2 more sources
Nuclear Instruments and Methods in Physics Research, 1984
The development of the Anger gamma camera is traced from its inception to the present day. In addition to discussing earlier forms of analogue pulse arithmetic used to construct the image, examples of more recent microprocessor-based techniques which improve performance and correct for inherent inhomogeneities are described.
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The development of the Anger gamma camera is traced from its inception to the present day. In addition to discussing earlier forms of analogue pulse arithmetic used to construct the image, examples of more recent microprocessor-based techniques which improve performance and correct for inherent inhomogeneities are described.
openaire +1 more source
Nuclear Medicine Communications, 1984
Performance data on seven currently available gamma cameras have been presented. Where appropriate, results from both the DHSS and NEMA are included. It should be emphasized that no 'best buy' exists for all types of nuclear medicine application and that the performance figures presented in this paper must be interpreted in the light of clinical ...
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Performance data on seven currently available gamma cameras have been presented. Where appropriate, results from both the DHSS and NEMA are included. It should be emphasized that no 'best buy' exists for all types of nuclear medicine application and that the performance figures presented in this paper must be interpreted in the light of clinical ...
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PET imaging using gamma cameras
Computerized Medical Imaging and Graphics, 2001This paper will review the recent advances and future developments in the field of coincidence imaging of positron emitters with a conventional Anger-type gamma camera. FDG imaging has shown high clinical importance in cardiology, neurology and especially oncology. Since access to full ring PET is mainly limited to university hospitals, there have been
Y, D'Asseler +7 more
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2010
La scintigrafia e una tecnica della medicina nucleare che permette la misura in vivo della concentrazione locale di radiofarmaci che emettono raggi γ singoli. Si tratta dunque di una tecnica di imaging “in emissione”. Infatti, al contrario delle cosiddette tecniche “in trasmissione”, come la radiografia a raggi X o la TC, dove i fotoni vengono emessi ...
DEL GUERRA, ALBERTO, BELCARI, NICOLA
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La scintigrafia e una tecnica della medicina nucleare che permette la misura in vivo della concentrazione locale di radiofarmaci che emettono raggi γ singoli. Si tratta dunque di una tecnica di imaging “in emissione”. Infatti, al contrario delle cosiddette tecniche “in trasmissione”, come la radiografia a raggi X o la TC, dove i fotoni vengono emessi ...
DEL GUERRA, ALBERTO, BELCARI, NICOLA
openaire +2 more sources
2011
Crystals and collimators 32Photomultiplier tubes and electronics 34Gamma camera performance parameters and quality control (1) 36Gamma camera performance parameters and quality control (2) 38Nuclear cardiology imaging is performed on an Anger gamma camera. Its key component is a large flat circular or rectangular sodium iodide crystal, activated by non-
Nikant Sabharwal +2 more
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Crystals and collimators 32Photomultiplier tubes and electronics 34Gamma camera performance parameters and quality control (1) 36Gamma camera performance parameters and quality control (2) 38Nuclear cardiology imaging is performed on an Anger gamma camera. Its key component is a large flat circular or rectangular sodium iodide crystal, activated by non-
Nikant Sabharwal +2 more
openaire +1 more source
Gamma camera imaging in malignancy
European Journal of Cancer, 2002The aim of this article is to describe the current applications of gamma camera imaging in oncology with some references to potential uses currently under investigation. Initially, the basic principles and techniques will be described, followed by a general discussion of routine and novel radiopharmaceuticals.
J W, Evans, A M, Peters
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