NDLI: Validation of the spatially variant probability density functions for the HRRT

Content Provider	IEEE Xplore Digital Library
Author	Yiqiang Jian Rutao Yao Mulnix, T. Carson, R.E.
Copyright Year	2011
Description	Author affiliation: PET center, Yale University, New Haven, CT 06520, USA (Yiqiang Jian; Mulnix, T.; Carson, R.E.) \|\| Department of Nuclear Medicine, University at Buffalo, SUNY, NY 14214, USA (Rutao Yao)
Abstract	The probability density function (PDF) is a new concept of modeling the spatial dependence of the system response. In iterative reconstruction algorithms, the PDF plays the same important role as the point spread function in recovering images of high resolution. For the HRRT with a large number of lines of response, Monte Carlo simulation, along with an effective parameterization strategy, provides a practical solution to generating the PDFs that can be used in our listmode reconstruction algorithm (MOLAR). However, the PDF's accuracy, which depends on the accuracy of the simulated HRRT scanner, is still unverified. This study aims to validate the PDFs derived from simulation for the HRRT, by comparison to binned point source data. It is shown that the shape and width of the PDFs vary as a function of the incident angles to the detectors, and depth along each LOR, consistent with simulation results. However, the variability by detector layer for the HRRT phoswich is found to be significant in the experimental results, with roughly 20–40% degradations in FWHM and FWTM between the front-layer and back-layer PDFs, as compare to simulated results. On the other hand, all experimentally derived PDFs have larger spread than the simulated PDFs. The differences in FWHM, which are layer-dependent, range from 0.5mm to 1.5mm. We conclude that corrections of simulated PDF are required in order to achieve accurate resolution modeling.
Starting Page	2443
Ending Page	2446
File Size	866766
Page Count	4
File Format	PDF
ISBN	9781467301183
ISSN	10823654
e-ISBN	9781467301206
DOI	10.1109/NSSMIC.2011.6152664
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-10-23
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Logic gates
Content Type	Text
Resource Type	Article

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

Validation of the spatially variant probability density functions for the HRRT

Full field spatially-variant image-based resolution modelling reconstruction for the HRRT

Evaluation of image based spatially variant and count rate dependant point spread functions on the HRRT PET scanner

List-mode reconstruction for the FOCUS-220 with motion correction and spatially-variant probability density functions: Application to awake monkey imaging

Output probability density functions of logic circuits: Modeling and fault-tolerance evaluation

Physical synthesis of DNA circuits with spatially localized gates

The probability logics for nanoscale inverters cascade

Performance analysis and comparison of two 1T/1MTJ-based logic gates

Probabilistic methods for the impact of an SET in combinational logic

Validation of the spatially variant probability density functions for the HRRT

Similar Documents

Validation of the spatially variant probability density functions for the HRRT

Full field spatially-variant image-based resolution modelling reconstruction for the HRRT

Evaluation of image based spatially variant and count rate dependant point spread functions on the HRRT PET scanner

List-mode reconstruction for the FOCUS-220 with motion correction and spatially-variant probability density functions: Application to awake monkey imaging

Output probability density functions of logic circuits: Modeling and fault-tolerance evaluation

Physical synthesis of DNA circuits with spatially localized gates

The probability logics for nanoscale inverters cascade

Performance analysis and comparison of two 1T/1MTJ-based logic gates

Probabilistic methods for the impact of an SET in combinational logic

Validation of the spatially variant probability density functions for the HRRT