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Calculation and validation of the use of effective attenuation coefficient for attenuation correction in In-111 SPECT
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10.1118/1.2128084
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    Affiliations:
    1 Physics Research Laboratory, Department of Radiology, University of California, San Francisco, California 94143
    2 Physics Research Laboratory, Department of Radiology, University of California, San Francisco, California 94143 and Joint Graduate Group in Bioengineering, University of California, San Francisco and Berkeley, California 94143
    3 Physics Research Laboratory, Department of Radiology, University of California, San Francisco, California 94143, Department of Nuclear Engineering, University of California, Berkeley, California 94720, and Joint Graduate Group in Bioengineering, University of California, San Francisco and Berkeley, California 94143
    a) Author to whom correspondence should be addressed. Electronic mail: youngho.seo@radiology.ucsf.edu
    b) Currently at the Imaging Science and Information Systems (ISIS) Center, Department of Radiology, Georgetown University Medical Center, Washington, District of Columbia 20057.
    Med. Phys. 32, 3628 (2005); http://dx.doi.org/10.1118/1.2128084
/content/aapm/journal/medphys/32/12/10.1118/1.2128084
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/32/12/10.1118/1.2128084

Figures

Image of FIG. 1.
FIG. 1.

The effective attenuation coefficient as a function of as well as its percentage difference from attenuation coefficient at the weighted average assuming water as attenuating material.

Image of FIG. 2.
FIG. 2.

SPECT images from the uniform tank filled with . Images are labeled with the attenuation correction method used for reconstruction. The edge artifact is clearly visible without attenuation correction (lower right image).

Image of FIG. 3.
FIG. 3.

Line profiles from the experimental SPECT study of the uniform tank.

Image of FIG. 4.
FIG. 4.

SPECT images reconstructed with a maximum-likelihood algorithm with (upper left) corrections for photon attenuation (AC) and collimator response (CR), and (upper right) corrections for photon attenuation and scatter (SC), from the uniform tank filled with . Line profiles (bottom) are also shown, respectively.

Tables

Generic image for table
TABLE I.

Absorption of gamma-rays by sodium iodide.

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/content/aapm/journal/medphys/32/12/10.1118/1.2128084
2005-11-16
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Calculation and validation of the use of effective attenuation coefficient for attenuation correction in In-111 SPECT
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/32/12/10.1118/1.2128084
10.1118/1.2128084
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