The role of activity, scan duration and patient's weight in the optimization of 18FDG imaging protocols on a TOF-PET/CT scanner Article Swipe
Roberta Matheoud
,
Naema Al-Maymani
,
Alessia Oldani
,
Gian Mauro Sacchetti
,
Marco Brambilla
,
Alessandro Carriero
·
YOU?
·
· 2020
· Open Access
·
· DOI: https://doi.org/10.21203/rs.3.rs-17743/v1
YOU?
·
· 2020
· Open Access
·
· DOI: https://doi.org/10.21203/rs.3.rs-17743/v1
Background : Time-of-flight (TOF) PET technology determines a reduction in the noise and improves the reconstructed image quality , in low counts acquisitions, such as in overweight patients, allowing a reduction of administered activity and/or imaging time. However, international guidelines and recommendations on 18 F-fluoro-2-deoxyglucose (FDG) activity administration scheme are old or only partially account for TOF technology and advanced reconstruction modalities. The aim of this study was to optimize FDG whole-body studies on a TOF PET/CT scanner by using a multivariate approach to quantify how physical figures of merit related to image quality change with acquisition/reconstruction/patient-dependent parameters in a phantom experiment.Methods : The NEMA-IEC body phantom was used to evaluate contrast recovery coefficient (CRC), background variability (BV) and contrast-to-noise ratio (CNR) as a function of changing emission scan duration (ESD), activity concentration (AC), target internal diameter (ID), target-background activity ratio (TBR), and weight. The phantom was filled with 5.3 kBq/mL of FDG solution and the spheres with TBR of 21, 9, and 5 in 3 different sessions. Images were acquired at varying activity concentration from 5.1 to 1.3 kBq/mL and images were reconstructed for ESD of 30-151 seconds per bed position with and without Point Spread Function (PSF) correction. The parameters were all considered in simultaneous experiments and in a single analysis using multiple linear regression methods.Results : As expected, CRC depended only on sphere ID and on PSF application, while BV depended on sphere ID, ESD, AC and weight of the patient, in order of decreasing relevance. Noteworthy, ESD and AC resulted as the most significant predictors of CNR variability with a similar relevance, followed by the weight of the patient and TBR of the lesion.Conclusions : Due to the interchangeable role of AC and ESD in modulating CRC, ESD could be increased rather than AC to improve image quality in overweight/obese patients to fulfil ALARA principles.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- https://doi.org/10.21203/rs.3.rs-17743/v1
- https://www.researchsquare.com/article/rs-17743/v1.pdf
- OA Status
- gold
- References
- 16
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4248475730
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4248475730Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.21203/rs.3.rs-17743/v1Digital Object Identifier
- Title
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The role of activity, scan duration and patient's weight in the optimization of 18FDG imaging protocols on a TOF-PET/CT scannerWork title
- Type
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preprintOpenAlex work type
- Language
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enPrimary language
- Publication year
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2020Year of publication
- Publication date
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2020-03-23Full publication date if available
- Authors
-
Roberta Matheoud, Naema Al-Maymani, Alessia Oldani, Gian Mauro Sacchetti, Marco Brambilla, Alessandro CarrieroList of authors in order
- Landing page
-
https://doi.org/10.21203/rs.3.rs-17743/v1Publisher landing page
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https://www.researchsquare.com/article/rs-17743/v1.pdfDirect link to full text PDF
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YesWhether a free full text is available
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goldOpen access status per OpenAlex
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https://www.researchsquare.com/article/rs-17743/v1.pdfDirect OA link when available
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0Total citation count in OpenAlex
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16Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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| primary_location.is_published | False |
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| primary_location.landing_page_url | https://doi.org/10.21203/rs.3.rs-17743/v1 |
| publication_date | 2020-03-23 |
| publication_year | 2020 |
| referenced_works | https://openalex.org/W2281211957, https://openalex.org/W2116181343, https://openalex.org/W2161249702, https://openalex.org/W1976285425, https://openalex.org/W6682610248, https://openalex.org/W2088783247, https://openalex.org/W2934017706, https://openalex.org/W2789092340, https://openalex.org/W2989864510, https://openalex.org/W2169683146, https://openalex.org/W2075919107, https://openalex.org/W2054316076, https://openalex.org/W1966511552, https://openalex.org/W2905742122, https://openalex.org/W2538300735, https://openalex.org/W2056687401 |
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