Correction for emission contamination in transmission scans for the high resolution research tomograph

Hugo W A M De Jong; Ronald Boellaard; Mark Lenox; Christiaan Michel; Adriaan A. Lammertsma

doi:10.1109/TNS.2004.829592

Correction for emission contamination in transmission scans for the high resolution research tomograph

Hugo W A M De Jong^*, Ronald Boellaard, Mark Lenox, Christiaan Michel, Adriaan A. Lammertsma

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The High Resolution Research Tomograph (HRRT) PET scanner is equipped with a moving Cs-137 transmission point source emitting 662 keV single photons. During post-injection transmission imaging 511 keV emission photons can be detected in the transmission window leading to gross underestimation of the reconstructed μ-value. Using cylindrical phantoms, methods to compensate for this emission contamination (EC) were investigated including histogram-based scaling and segmentation, while varying transmission window settings were used. Furthermore, the effects of subtracting a uniform or nonuniform EC estimation prior to transmission reconstruction were quantified. In conclusion, EC during HRRT transmission scans can lead to gross underestimation of μ-values, and the most accurate way to compensate for this is to combine nonuniform EC subtraction with transmission image segmentation. Emission contamination, image.

Original language	English
Pages (from-to)	673-676
Number of pages	4
Journal	IEEE Transactions on Nuclear Science
Volume	51
Issue number	3 II
DOIs	https://doi.org/10.1109/TNS.2004.829592
Publication status	Published - 1 Jun 2004

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10.1109/TNS.2004.829592

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title = "Correction for emission contamination in transmission scans for the high resolution research tomograph",

abstract = "The High Resolution Research Tomograph (HRRT) PET scanner is equipped with a moving Cs-137 transmission point source emitting 662 keV single photons. During post-injection transmission imaging 511 keV emission photons can be detected in the transmission window leading to gross underestimation of the reconstructed μ-value. Using cylindrical phantoms, methods to compensate for this emission contamination (EC) were investigated including histogram-based scaling and segmentation, while varying transmission window settings were used. Furthermore, the effects of subtracting a uniform or nonuniform EC estimation prior to transmission reconstruction were quantified. In conclusion, EC during HRRT transmission scans can lead to gross underestimation of μ-values, and the most accurate way to compensate for this is to combine nonuniform EC subtraction with transmission image segmentation. Emission contamination, image.",

keywords = "High Resolution Research Tomograph (HRRT), PET, Reconstruction, Transmission",

author = "{De Jong}, {Hugo W A M} and Ronald Boellaard and Mark Lenox and Christiaan Michel and Lammertsma, {Adriaan A.}",

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TY - JOUR

T1 - Correction for emission contamination in transmission scans for the high resolution research tomograph

AU - De Jong, Hugo W A M

AU - Boellaard, Ronald

AU - Lenox, Mark

AU - Michel, Christiaan

AU - Lammertsma, Adriaan A.

PY - 2004/6/1

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N2 - The High Resolution Research Tomograph (HRRT) PET scanner is equipped with a moving Cs-137 transmission point source emitting 662 keV single photons. During post-injection transmission imaging 511 keV emission photons can be detected in the transmission window leading to gross underestimation of the reconstructed μ-value. Using cylindrical phantoms, methods to compensate for this emission contamination (EC) were investigated including histogram-based scaling and segmentation, while varying transmission window settings were used. Furthermore, the effects of subtracting a uniform or nonuniform EC estimation prior to transmission reconstruction were quantified. In conclusion, EC during HRRT transmission scans can lead to gross underestimation of μ-values, and the most accurate way to compensate for this is to combine nonuniform EC subtraction with transmission image segmentation. Emission contamination, image.

AB - The High Resolution Research Tomograph (HRRT) PET scanner is equipped with a moving Cs-137 transmission point source emitting 662 keV single photons. During post-injection transmission imaging 511 keV emission photons can be detected in the transmission window leading to gross underestimation of the reconstructed μ-value. Using cylindrical phantoms, methods to compensate for this emission contamination (EC) were investigated including histogram-based scaling and segmentation, while varying transmission window settings were used. Furthermore, the effects of subtracting a uniform or nonuniform EC estimation prior to transmission reconstruction were quantified. In conclusion, EC during HRRT transmission scans can lead to gross underestimation of μ-values, and the most accurate way to compensate for this is to combine nonuniform EC subtraction with transmission image segmentation. Emission contamination, image.

KW - High Resolution Research Tomograph (HRRT)

KW - PET

KW - Reconstruction

KW - Transmission

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JO - IEEE Transactions on Nuclear Science

JF - IEEE Transactions on Nuclear Science

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Correction for emission contamination in transmission scans for the high resolution research tomograph

Abstract

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