NDLI: Image-based correction for mismatched attenuation in PET images

Content Provider	IEEE Xplore Digital Library
Author	Thielemans, Kris Asma, Evren Manjeshwar, Ravindra M. Ganin, Alex Spinks, Terence J.
Copyright Year	2008
Description	Author affiliation: Functional Imaging Lab, GE Global Research, Niskayuna, NY, USA (Asma, Evren; Manjeshwar, Ravindra M.) \|\| GE Healthcare, Waukesha, WI, USA (Ganin, Alex) \|\| Hammersmith Imanet Ltd, part of GE Healthcare, London, UK (Thielemans, Kris; Spinks, Terence J.)
Abstract	Attenuation correction is essential for quantification in PET. The attenuation estimate is normally based on an additional measurement, e.g. transmission scan or CT, or on some calculation. If the estimate is inaccurate, the resulting emission images will show artefacts. For instance, a common problem is patient movement between the PET and CT scan. Using approximations we show that the error in the emission image is essentially local to where the attenuation mismatch occurred. We derive formulas for the error in the emission image and show that it is proportional to the error in the attenuation image. We present an approximate method to correct the emission image if it was computed with the wrong attenuation estimate. The method only needs the current emission image and an estimate for the attenuation mismatch, i.e. no further reconstruction is necessary. Moreover the correction term can be computed very fast. We show results with FBP and OSEM reconstructed images.
Starting Page	5292
Ending Page	5296
File Size	4887324
Page Count	5
File Format	PDF
ISBN	9781424427147
ISSN	10957863
DOI	10.1109/NSSMIC.2008.4774427
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-19
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Positron emission tomography Computed tomography Image reconstruction Medical services Error correction Nuclear and plasma sciences Attenuation measurement Heart beat Data analysis Myocardium
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
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