نتایج جستجو برای: spect ct

تعداد نتایج: 142504  

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2006
Nick Dudley Charnie Kalirai

UNLABELLED Precise and reliable assessment of left ventricular (LV) function and dimensions is prognostically important in cardiac patients. As the integration of SPECT and multislice CT into hybrid scanners will promote the combined use of both techniques in the same patient, a comparison of the 2 methods is pertinent. We aimed at comparing LV dimensions, muscle mass, and function obtained by ...

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2015
Yong-il Kim Minseok Suh Yu Kyeong Kim Ho-Young Lee Kichul Shin

BACKGROUND The role of conventional bone scintigraphy in diagnosing early axial spondyloarthritis (SpA) is yet controversial. Single positron emission computed tomography (SPECT) plus CT is an imaging modality that adds better anatomical information to scintigraphy of the sacroiliac (SI) joint. Our aim was to investigate the usefulness of bone SPECT/CT with volume of interest (VOI) analysis in ...

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Journal: :Radiographics : a review publication of the Radiological Society of North America, Inc 2008
Bohdan Bybel Richard C Brunken Frank P DiFilippo Donald R Neumann Guiyun Wu Manuel D Cerqueira

Single-photon emission computed tomography (SPECT) has been a mainstay of nuclear medicine practice for several decades. More recently, combining the functional imaging available with SPECT and the anatomic imaging of computed tomography (CT) has gained more acceptance and proved useful in many clinical situations. Most vendors now offer integrated SPECT/CT systems that can perform both functio...

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2018
Grigorios-Aris Cheimariotis Mariam Al-Mashat Kostas Haris Anthony H Aletras Jonas Jögi Marika Bajc Nicolaos Maglaveras Einar Heiberg

OBJECTIVE Image segmentation is an essential step in quantifying the extent of reduced or absent lung function. The aim of this study is to develop and validate a new tool for automatic segmentation of lungs in ventilation and perfusion SPECT images and compare automatic and manual SPECT lung segmentations with reference computed tomography (CT) volumes. METHODS A total of 77 subjects (69 pat...

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Journal: :Diagnostic and interventional radiology 2011
Mehmet Ozer Oksüz Helmut Dittmann Corinna Wicke Karsten Müssig Roland Bares Christina Pfannenberg Susanne Martina Eschmann

PURPOSE To compare the accuracy of planar scintigraphy, single photon emission computed tomography (SPECT), SPECT-CT, and positron emission tomography (PET) with C-11 methionine for the pre-operative detection of parathyroid adenomas. MATERIALS AND METHODS We retrospectively evaluated the pre-operative studies of 60 patients with primary (n=56) and secondary (n=4) hyperparathyroidism. In 25/6...

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2011
Etienne Garin Yan Rolland Laurence Lenoir Marc Pracht Habiba Mesbah Philippe Porée Sophie Laffont Bruno Clement Jean-Luc Raoul Eveline Boucher

Objectives. The aim of this study was to assess the effectiveness of SPECT/CT for volume measurements and to report a case illustrating the major impact of SPECT/CT in calculating the vascularized liver volume and dosimetry prior to injecting radiolabelled yttrium-90 microspheres (Therasphere). Materials and Methods. This was a phantom study, involving volume measurements carried out by two ope...

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Journal: :Computer methods and programs in biomedicine 2008
Lisa Tang Ghassan Hamarneh Anna Celler

The registration of computed tomography (CT) and nuclear medicine (NM) images can substantially enhance patient diagnosis as it allows for the fusion of anatomical and functional information, as well as the attenuation correction of NM images. However, irrespective of the method used, registration accuracy depends heavily on the characteristics of the images that are registered and the degree o...

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2015
Dustin R. Osborne Derek W. Austin

Multi-modality imaging provides coregistered PET-CT and SPECT-CT images; however such multi-modality workflows usually consist of sequential scans from the individual imaging components for each modality. This typical workflow may result in long scan times limiting throughput of the imaging system. Conversely, acquiring multi-modality data simultaneously may improve correlation and registration...

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2003
A. Del Guerra G. Di Domenico A. Fantini M. Gambaccini L. Milano N. Sabba A. Taibi A. Tartari A. Tuffanelli G. Zavattini R. Pani R. Pellegrini A. Soluri M. N. Cinti A. Bevilacqua D. Bollini M. Gombia F. Arfelli R. Longo A. Olivo S. Pani P. Poropat L. Rigon

A prototype of a combined CT–SPECT tomograph for breast cancer study has been developed and evaluated. It allows to perform scintimammography and X-ray CT in the same geometrical conditions. The CT system is based on a quasi-monochromatic beam tuned at 28 keV and an array of ultra fast ceramic scintillators coupled to photodiodes whilst the SPECT system is based on two scintillator matrices cou...

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2012
Michael T. Hirschmann Christopher R. Wagner Helmut Rasch Johann Henckel

BACKGROUND SPECT/CT combines high resolution anatomical 3D computerized tomography (CT) and single photon emission computerized tomography (SPECT) as functional imaging, which provides 3D information about biological processes into a single imaging modality. The clinical utility of SPECT/CT imaging has been recognized in a variety of medical fields and most recently in orthopaedics; however, cl...

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