SUV(fdg): A standard-uptake-value (SUV) body habitus normalizer specific to fluorodeoxyglucose (FDG) in humans Journal Article
| Authors: | Beattie, B. J.; Akhurst, T. J.; Augensen, F.; Humm, J. L. |
| Article Title: | SUV(fdg): A standard-uptake-value (SUV) body habitus normalizer specific to fluorodeoxyglucose (FDG) in humans |
| Abstract: | Purpose To devise a new body-habitus normalizer to be used in the calculation of an SUV that is specific to the PET tracer 18F-FDG. Methods A cohort of 481-patients was selected for analysis of 18F-FDG uptake into tissues unaffected by their disease. Among these, 65-patients had only brain concentrations measured and the remaining 416 were randomly divided into an 86-patient test set and a 330-patient training set. Within the test set, normal liver, spleen and blood measures were made. In the training set, only normal liver concentrations were measured. Using data from the training set, a simple polynomial function of height and weight was selected and optimized in a fitting procedure to predict each patient’s mean liver %ID/ml. This function, when used as a normalizer, defines a new SUV metric (SUVfdg) which we compared to SUV metrics normalized by body weight (SUVbw), lean-body mass (SUVlbm) and body surface-area (SUVbsa) in a five-fold cross-validation. SUVfdg was also evaluated in the independent brain-only and whole-body test sets. Results For patients of all sizes including pediatric patients, the normal range of liver 18F-FDG uptake at 60 minutes post injection in units of SUVfdg is 1.0 ± 0.16. Liver, blood, and spleen SUVfdg in all comparisons had lower coefficients of variation compared to SUVbw SUVlbm and SUVbsa. Blood had a mean SUVfdg of 0.8 ± 0.11 and showed no correlation with age, height, or weight. Brain SUVfdg measures were significantly higher (P<0.01) in pediatric patients (4.7 ± 0.9) compared to adults (3.1 ± 0.6). Conclusion A new SUV metric, SUVfdg, is proposed. It is hoped that SUVfdg will prove to be better at classifying tumor lesions compared to SUV metrics in current use. Other tracers may benefit from similarly tracer-specific body habitus normalizers. © 2022 Beattie et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| Keywords: | adolescent; adult; child; controlled study; human tissue; aged; functional assessment; major clinical study; positron emission tomography; radiopharmaceuticals; neoplasm; neoplasms; cohort studies; randomized controlled trial; cohort analysis; body weight; retrospective study; correlation coefficient; statistical significance; drug uptake; infant; dosimetry; fluorodeoxyglucose f 18; fluorodeoxyglucose f18; positron-emission tomography; radiopharmaceutical agent; body height; drug blood level; predictive value; blood examination; standardized uptake value; body surface; liver examination; drug brain level; lean body weight; humans; human; male; female; article; body surface area; body build; cross validation; body habitus; spleen examination |
| Journal Title: | PLoS ONE |
| Volume: | 17 |
| Issue: | 4 |
| ISSN: | 1932-6203 |
| Publisher: | Public Library of Science |
| Date Published: | 2022-04-21 |
| Start Page: | e0266704 |
| Language: | English |
| DOI: | 10.1371/journal.pone.0266704 |
| PUBMED: | 35446848 |
| PROVIDER: | scopus |
| PMCID: | PMC9022879 |
| DOI/URL: | |
| Notes: | Article -- Export Date: 1 June 2022 -- Source: Scopus |
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