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A Comparison of Techniques for (90)Y PET/CT Image-Based Dosimetry Following Radioembolization with Resin Microspheres

(90)Y PET/CT following radioembolization has recently been established as a viable diagnostic tool, capable of producing images that are both quantitative and have superior image quality than alternative (90)Y imaging modalities. Because radioembolization is assumed to be a permanent implant, it is...

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Autores principales: Pasciak, Alexander S., Bourgeois, Austin C., Bradley, Yong C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4033229/
https://www.ncbi.nlm.nih.gov/pubmed/24904832
http://dx.doi.org/10.3389/fonc.2014.00121
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author Pasciak, Alexander S.
Bourgeois, Austin C.
Bradley, Yong C.
author_facet Pasciak, Alexander S.
Bourgeois, Austin C.
Bradley, Yong C.
author_sort Pasciak, Alexander S.
collection PubMed
description (90)Y PET/CT following radioembolization has recently been established as a viable diagnostic tool, capable of producing images that are both quantitative and have superior image quality than alternative (90)Y imaging modalities. Because radioembolization is assumed to be a permanent implant, it is possible to convert quantitative (90)Y PET image sets into data representative of spatial committed absorbed-dose. Multiple authors have performed this transformation using dose-point kernel (DPK) convolution to account for the transport of the high-energy (90)Y β-particles. This article explores a technique called the Local Deposition Method (LDM), an alternative to DPK convolution for (90)Y image-based dosimetry. The LDM assumes that the kinetic energy from each (90)Y β-particle is deposited locally, within the voxel where the decay occurred. Using the combined analysis of phantoms scanned using (90)Y PET/CT and ideal mathematical phantoms, an accuracy comparison of DPK convolution and the LDM has been performed. Based on the presented analysis, DPK convolution provides no detectible accuracy benefit over the LDM for (90)Y PET-based dosimetry. For PET systems with (90)Y resolution poorer than 3.25 mm at full-width and half-max using a small voxel size, the LDM may produce a dosimetric solution that is more accurate than DPK convolution under ideal conditions; however, image noise can obscure some of the perceived benefit. As voxel size increases and resolution decreases, differences between the LDM and DPK convolution are reduced. The LDM method of post-radioembolization dosimetry has the advantage of not requiring additional post-processing. The provided conversion factors can be used to determine committed absorbed-dose using conventional PET image analysis tools. The LDM is a recommended option for routine post-radioembolization (90)Y dosimetry based on PET/CT imaging.
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spelling pubmed-40332292014-06-05 A Comparison of Techniques for (90)Y PET/CT Image-Based Dosimetry Following Radioembolization with Resin Microspheres Pasciak, Alexander S. Bourgeois, Austin C. Bradley, Yong C. Front Oncol Oncology (90)Y PET/CT following radioembolization has recently been established as a viable diagnostic tool, capable of producing images that are both quantitative and have superior image quality than alternative (90)Y imaging modalities. Because radioembolization is assumed to be a permanent implant, it is possible to convert quantitative (90)Y PET image sets into data representative of spatial committed absorbed-dose. Multiple authors have performed this transformation using dose-point kernel (DPK) convolution to account for the transport of the high-energy (90)Y β-particles. This article explores a technique called the Local Deposition Method (LDM), an alternative to DPK convolution for (90)Y image-based dosimetry. The LDM assumes that the kinetic energy from each (90)Y β-particle is deposited locally, within the voxel where the decay occurred. Using the combined analysis of phantoms scanned using (90)Y PET/CT and ideal mathematical phantoms, an accuracy comparison of DPK convolution and the LDM has been performed. Based on the presented analysis, DPK convolution provides no detectible accuracy benefit over the LDM for (90)Y PET-based dosimetry. For PET systems with (90)Y resolution poorer than 3.25 mm at full-width and half-max using a small voxel size, the LDM may produce a dosimetric solution that is more accurate than DPK convolution under ideal conditions; however, image noise can obscure some of the perceived benefit. As voxel size increases and resolution decreases, differences between the LDM and DPK convolution are reduced. The LDM method of post-radioembolization dosimetry has the advantage of not requiring additional post-processing. The provided conversion factors can be used to determine committed absorbed-dose using conventional PET image analysis tools. The LDM is a recommended option for routine post-radioembolization (90)Y dosimetry based on PET/CT imaging. Frontiers Media S.A. 2014-05-22 /pmc/articles/PMC4033229/ /pubmed/24904832 http://dx.doi.org/10.3389/fonc.2014.00121 Text en Copyright © 2014 Pasciak, Bourgeois and Bradley. http://creativecommons.org/licenses/by/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Oncology
Pasciak, Alexander S.
Bourgeois, Austin C.
Bradley, Yong C.
A Comparison of Techniques for (90)Y PET/CT Image-Based Dosimetry Following Radioembolization with Resin Microspheres
title A Comparison of Techniques for (90)Y PET/CT Image-Based Dosimetry Following Radioembolization with Resin Microspheres
title_full A Comparison of Techniques for (90)Y PET/CT Image-Based Dosimetry Following Radioembolization with Resin Microspheres
title_fullStr A Comparison of Techniques for (90)Y PET/CT Image-Based Dosimetry Following Radioembolization with Resin Microspheres
title_full_unstemmed A Comparison of Techniques for (90)Y PET/CT Image-Based Dosimetry Following Radioembolization with Resin Microspheres
title_short A Comparison of Techniques for (90)Y PET/CT Image-Based Dosimetry Following Radioembolization with Resin Microspheres
title_sort comparison of techniques for (90)y pet/ct image-based dosimetry following radioembolization with resin microspheres
topic Oncology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4033229/
https://www.ncbi.nlm.nih.gov/pubmed/24904832
http://dx.doi.org/10.3389/fonc.2014.00121
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