852 resources related to Nuclear Medicine
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No organizations are currently tagged "Nuclear Medicine"
The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted papers will be peer reviewed. Accepted high quality papers will be presented in oral and postersessions, will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE
All areas of ionizing radiation detection - detectors, signal processing, analysis of results, PET development, PET results, medical imaging using ionizing radiation
2020 IEEE 17th International Symposium on Biomedical Imaging (ISBI 2020)
The IEEE International Symposium on Biomedical Imaging (ISBI) is the premier forum for the presentation of technological advances in theoretical and applied biomedical imaging. ISBI 2020 will be the 17th meeting in this series. The previous meetings have played a leading role in facilitating interaction between researchers in medical and biological imaging. The 2020 meeting will continue this tradition of fostering cross-fertilization among different imaging communities and contributing to an integrative approach to biomedical imaging across all scales of observation.
Nuclear instrumentation and measurement methods in nuclear environments are key aspectsthat contribute to the quality of scientific programmes in the fields of physics, energy, the fuelcycle and waste management. Furthermore, measurements relying on nuclear physics now playan important role in various fields of application such as biology, medicine and the environment.The ANIMMA conference aims at uniting, consolidating and organizing an international networkof scientific researchers and experts from industry, research institutes, academic dealing withnuclear instrumentation and applications).ANIMMA 2017 is the fifth of a series of conferences devoted to endorsing andpromoting scientific and technical activities based on nuclear instrumentation andmeasurements.The main objective of ANIMMA conference is to unite the various scientific communities not onlyinvolved in nuclear instrumentation and measurements, but also in methodology activities (R&D, Innovation and
2019 IEEE International Conference on E-health Networking, Application & Services (HealthCom)
IEEE Healthcom 2019 aims at bringing together interested parties from around the world working in the healthcare field to exchange ideas, discuss innovative and emerging solutions, and develop collaborations.
No periodicals are currently tagged "Nuclear Medicine"
IEEE Transactions on Nuclear Science, 1974
A technique has been developed in the fabrication of high purity germanium gamma radiation detectors which consistently allows the application of large amounts of overvoltage. A chemically grown oxide layer to which Pd metallization adheres strongly forms a rugged surface barrier. Cycling temerature and between dry nitrogen and ambient air, changing contact fixtures, storage and transferring to different cryostats result ...
IEEE Transactions on Nuclear Science, 1979
Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing, 1994
We provide a methodology for specifying a set of simultaneous (1-/spl alpha/)% confidence intervals on the intensity of each image pixel for emission and transmission tomography. These intervals give a (1-/spl alpha/)% confidence region which, given a specific family of noise distributions, e.g. Gaussian or Poisson, is guaranteed to contain the actual image with probability at least 1-/spl alpha/. This ...
Proceedings of 7th International Workshop on Enterprise networking and Computing in Healthcare Industry, 2005. HEALTHCOM 2005., 2005
To calculate regional myocardial blood flow, ensemble ICA (independent component analysis) was evaluated. Myocardial blood flow was estimated from dynamic H/sub 2//sup 15/O PET, and perfusion score was computed from myocardial SPECT data in this study. In ensemble ICA, posterior pdf was approximated by a rectified Gaussian distribution to incorporate non- negativity constraint, which is suitable to dynamic images in ...
2008 IEEE Nuclear Science Symposium Conference Record, 2008
We are investigating techniques to develop organ specific models of normal functional Positron Emission Tomography (PET) uptake. A key issue in the development of models of functional uptake is the appropriate normalization of the PET uptake across multiple studies. It is well known that the tracer uptake in PET is subject is a range of variations including protocols and scanners, ...
A Nuclear Waste Repository Grows In Finland
Larson Collection interview with Linus Pauling, part 1
Larson Collection interview with Linus Pauling, part 2
2011 IEEE Medal for Innovations in Healthcare Technology - Harrison H. Barrett
Light Our Future - IEEE Photonics Society
Larson Collection interview with William Alfred Fowler
The Full Spectrum: Travelogue of the Atomic Age
Robotics History: Narratives and Networks Oral Histories:Ron Daniel
Robotics History: Narratives and Networks Oral Histories: Red Whittaker
Larson Collection interview with Edward Teller
Atom Smasher Dedication
Surgical Robotics: Medical robotics and computer-integrated interventional medicine
Larson Collection interview with Rudolph Peierls
The Full Spectrum: Wireless Power Roundup
Opening Chat: Rod Beckstrom and Xiaodong Lee - ETAP Beijing 2016
Robotics History: Narratives and Networks Oral Histories: Paolo Dario
EMBC 2011-Keynote-From Nature and Back Again ... Giving New Life to Materials for Energy, Electronics, Medicine and the Environment - Angela Belcher, PhD
Life on 150 Watts with a nano-hydroelectric turbine
EMBC 2011-Speaker Highlights-Ron Newbower, PhD
A technique has been developed in the fabrication of high purity germanium gamma radiation detectors which consistently allows the application of large amounts of overvoltage. A chemically grown oxide layer to which Pd metallization adheres strongly forms a rugged surface barrier. Cycling temerature and between dry nitrogen and ambient air, changing contact fixtures, storage and transferring to different cryostats result in no significant changes in the initially good I-V and noise characteristics.
We provide a methodology for specifying a set of simultaneous (1-/spl alpha/)% confidence intervals on the intensity of each image pixel for emission and transmission tomography. These intervals give a (1-/spl alpha/)% confidence region which, given a specific family of noise distributions, e.g. Gaussian or Poisson, is guaranteed to contain the actual image with probability at least 1-/spl alpha/. This region is a "set estimate" of the image which can be used to study confidence levels of popular image reconstructions such as filtered back projection, weighted-least-squares, and maximum likelihood. Alternatively, the set estimate can be used as a feasibility region from which particular image estimates can be selected based on additional criteria. A simulation for parallel ray projection geometries in emission tomography is given.<>
To calculate regional myocardial blood flow, ensemble ICA (independent component analysis) was evaluated. Myocardial blood flow was estimated from dynamic H/sub 2//sup 15/O PET, and perfusion score was computed from myocardial SPECT data in this study. In ensemble ICA, posterior pdf was approximated by a rectified Gaussian distribution to incorporate non- negativity constraint, which is suitable to dynamic images in nuclear medicine. Major cardiac components were separated successfully by the ensemble ICA method. Mean myocardial blood flow was 1.2/spl plusmn/0.40 ml/min/g in rest, 1.85/spl plusmn/1.12 ml/min/g in stress state. Reproducibility of data analysis for blood flow values were highly correlated (r=0.99). The image contrast between left ventricle and myocardium was better than other method. Perfusion reserve was decreased in the stenosis region. Applied ensemble ICA method will be a feasible method to handle dynamic image sequence obtained by the nuclear medicine techniques.
We are investigating techniques to develop organ specific models of normal functional Positron Emission Tomography (PET) uptake. A key issue in the development of models of functional uptake is the appropriate normalization of the PET uptake across multiple studies. It is well known that the tracer uptake in PET is subject is a range of variations including protocols and scanners, reconstruction algorithm as well as biological effects. In this study, we investigate and report results of normalization strategies for a group of organs. In particular, we evaluate the performance of reference tissue normalization strategies applied to our problem and propose a novel normalization strategy that estimates the normal uptake for a particular organ from that of a number of reference tissue regions that may be assumed to be disease-free. Results from the quantitative analysis indicate that a normalisation method using weighted contribution from a number of reference regions perform better than the best normalisation using a single reference region (liver), and show equivalent performance of both normalisation strategies for the abnormal voxel classification experiment.
The feasibility of simultaneously acquiring whole body Emission and Transmission scans using short or partially extended transmission rods was investigated. Count rate tests were performed on an ECAT HR+, where 3 rods filled with /sup 11/C were extended fully and partially into the FOV in the presence of an emission source (cylinder phantom 0.25 /spl mu/Ci/cc). Prompt and random coincidences were acquired separately with rod windowing to allow separation of Em and Tx counts. At a total rod strength of 0.5 mCi/cm the randoms in the Em and Tx data were reduced by 90% and 65%, respectively. The Em-NEC was improved by a factor of 4 by reducing the exposed length to 4 cm. In addition, the Tx count rate was improved by 32% due to reduced dead time. Using short (or partially extended) Tx rods, randoms rates and dead-time are significantly reduced, which should allow simultaneous Em and Tx scanning using conventional strength Tx sources without significantly degrading the Em images from increased randoms.
The limits of tumor detection by means of nuclear medicine do not exceed: 3 mm for X-Ray tomography and MRI; 4 mm for PET; 1.5 in diameter in average by clinical investigation among the USA citizens. Thus at least 3 problems remain unsolved: diagnostics and consequent treatment of the one third of all malignant tumors', i.e. their early states, squamous cell carcinoma of mucous tissue; and the third one problem: `a long way and expensive'. The limit of tumor detection by methods of optical spectroscopy is around 1-2 mm, although in principle it is possible to reach pathologies 5-10 μm in diameter. The problem formation: It is possible to diagnose and conduct treatment of those types of pathologies which could be reached by irradiation or could selectively accumulate a Photosensitiser (PS).
Recently suggested non-negative matrix factorization (NMF) seems to overcome fundamental limitations of factor analysis at least In theoretical aspect. NMF cost function uses Poisson statistics as a noise model, rather than the Gaussian statistics, and provides a simple learning rule, in contrast to the tricky optimization in factor analysis. To study the feasibility of NMF for the analysis of dynamic image sequences in nuclear medicine, NMF was applied to H/sub 2//sup 15/O dynamic myocardial PET Images acquired from dog studies, and the results were compared with those obtained by conventional factor analysis method. Using NMF we could obtain basis images corresponding to major cardiac components. Their time-activity curves showed reasonable shapes that we have been familiar with. With the assumption of proper number of factors, NMF presented good results at least similar with those by factor analysis. Our results showed that NMF would be feasible for image segmentation and factor extraction from dynamic image sequences in nuclear medicine.
Energy windows used clinically in nuclear medicine (20-30%) accept a significant proportion of Compton scattered photons to highly degrade image contrast. We developed an Iterative Energy Spectrum Deconvolution (IESD) algorithm for improving the energy resolution of gamma camera to reduce the impact of photon scatter on radionuclide images. Using only those deconvoluted energy components near the photopeak, we exclude scattered photons to form scatter corrected projections. All phantom studies reconstructed with attenuation correction and IESD correction were shown significant improved contrast as cardiac and hepatic activity separation. Contrast of presenting defect region was also significantly enhanced in the phantom and patient studies. Computational times for energy deconvolution times were within clinically acceptable norms (/spl sim/14 minutes/64 projections, 2 GHz, 100 iters). The computational requirements of this technique make it feasible for routine clinical use.
No standards are currently tagged "Nuclear Medicine"