NDLI: Acquisition of attenuation map for brain PET study using optical tracking system

Content Provider	IEEE Xplore Digital Library
Author	Watabe, H. Sato, N. Deloar, H.M. Urayama, S.I. Oka, H. Iida, H.
Copyright Year	2002
Description	Author affiliation: Res. Inst., Nat. Cardiovascular Center, Osaka, Japan (Watabe, H.)
Abstract	Attenuation correction (AC) is essential in order to get quantitative data with positron emission tomography (PET). AC is normally carried out using transmission scan, which is obtained by scanning a subject with external radiation source before the administration of radiopharmaceuticals. The transmission scan makes longer time of PET study and additional radiation exposure to the subject. To avoid these inconveniences, we have aimed to develop a technique to generate attenuation map without the transmission scan for brain PET study. In the procedure, a special cap was designed to put on the head of the subject to be scanned for brain PET study. The surface of the cap has 22 points of markers. An optical tracking system was utilized to determine positions of these 22 markers. In order to obtain the reference attenuation map and positions of 22 markers, the cap was put on the head of a reference subject and the transmission scan was performed. In order to generate a subject's attenuation map, the subject put on the cap and the positions of 22 markers were determined by the optical tracking system. The thin plate spline (TPS) technique was employed to transform from the reference attenuation map to a target subject's attenuation map using 22 markers as control points. Preliminary experiment showed good agreement between the attenuation map computed by the present method and the actual attenuation map by the transmission scan. The present method has potential to shorten brain PET study and reduce the exposure of radiation to the subject. The method might provide an accurate attenuation map for single-photon emission computed tomography (SPECT) study.
Starting Page	1458
Ending Page	1461
File Size	583289
Page Count	4
File Format	PDF
ISBN	0780373243
ISSN	10823654
DOI	10.1109/NSSMIC.2001.1008612
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-11-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical attenuators Positron emission tomography Attenuation Cardiology Telephony Head Stimulated emission Biomedical optical imaging Target tracking Image edge detection
Content Type	Text
Resource Type	Article

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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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