Please wait, while we are loading the content...
Please wait, while we are loading the content...
Content Provider | IEEE Xplore Digital Library |
---|---|
Author | Crosetto, D.B. |
Copyright Year | 2000 |
Abstract | Measurements performed by manufacturers on their PET devices reveal a limitation of the electronics in extracting the properties of particles hitting the detector. As a consequence, either a lead collimator with holes is placed in front of the detector (2-D mode) preventing many photons which are not sufficiently aligned with the holes from ever reaching the detector, or many photons are lost because the electronics cannot fully process the data and separate the good event from the bad events. In order to overcome the above limitation, a data acquisition system based on the programmable 3D-Flow processor has been designed for acquiring data from modules for multi-modality PET/SPECT/CT. The modular electronics allows for digital data to be acquired from all sensors included in a given view angle of the detector. Each channel can sustain an input data rate of 20 MHz, 64-bit word; 40 MHz, 32-bit word; or 80 MHz, 16-bit word. The bits at each electronic channel correspond to spatial, timing, and energy information from photomultipliers, avalanche photodiodes (APD), photodiodes, or other sensors. The programmable circuit performs digital signal-processing operations on the incoming bit string such as: (a) variable digital integration time (or pileup identification/correction) which allows for the maximum count rate capabilities while preserving spatial resolution; (b) depth of interaction which reduces the parallax error based on pulse shape discrimination (PSD), and/or pulse height discrimination (PHD); (c) improvement of the signal-to-noise ratio; (d) centroid calculation to improve spatial resolution or/and techniques of most likely position given the statistical nature of the signals; (e) correlation with neighboring signals; and (f) improving the timing resolution from the information received from the time-to-digital converter and pulse shape analysis. |
File Size | 827314 |
File Format | |
ISBN | 0780365038 |
ISSN | 10823654 |
DOI | 10.1109/NSSMIC.2000.949873 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2000-10-15 |
Publisher Place | France |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Detectors Signal processing Spatial resolution Pulse circuits Pulse shaping methods Positron emission tomography Event detection Single photon emission computed tomography Timing Shape |
Content Type | Text |
Resource Type | Article |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
Sl. | Authority | Responsibilities | Communication Details |
---|---|---|---|
1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
Loading...
|