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European Journal of Medical Research
Published in: European Journal of Medical Research 1/2016

Open Access 01-12-2016 | Research

Focal colorectal uptake in 18FDG-PET/CT: maximum standard uptake value as a trigger in a semi-automated screening setting

Authors: Wolfgang Luboldt, Baerbel Wiedemann, Sebastian Fischer, Boris Bodelle, Hans Joachim Luboldt, Frank Grünwald, Thomas J. Vogl

Published in: European Journal of Medical Research | Issue 1/2016

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Abstract

Background

Focal colorectal uptake in 18FDG-PET/CT may be associated with a malignancy and can be quantified. This provides the basis for an automatic trigger threshold above which cases are flagged for colonoscopic evaluation and below which for individual assessment.

Purpose

To determine the lowest maximum standard uptake (SUVmax) in colorectal cancer that could be used as a threshold to trigger endoscopic evaluation and to evaluate whether the SUVmax needs to be further normalised to a priori known extrinsic factors.

Methods

The SUVmax was measured in 54 colorectal carcinomas and correlated with gender, age, blood glucose level, injected activity, body mass index and time to scan using t test or correlation coefficients (Pearson or Spearman, according to distribution).

Results

There was no correlation between SUVmax and any of the extrinsic factors mentioned above. The lowest SUVmax value was 5 [mean ± SD (range): 11.1 ± 4.8 (5.0–24.6)].

Conclusion

In contrast to most other screening techniques, semi-automation in colorectal screening seems possible with PET/CT. This opens the door for further study into the feasibility of automated screening. Independent from extrinsic factors, an SUVmax ≥5.0 in a focal colorectal uptake in 18FDG-PET/CT should automatically trigger for endoscopic evaluation, if not contraindicated. Cases with SUVmax <5 should be assessed individually before referral for endoscopy. Thus, more interpretation time could be spent on those cases with a lower uptake and more ambiguous diagnosis.
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Metadata
Title
Focal colorectal uptake in 18FDG-PET/CT: maximum standard uptake value as a trigger in a semi-automated screening setting
Authors
Wolfgang Luboldt
Baerbel Wiedemann
Sebastian Fischer
Boris Bodelle
Hans Joachim Luboldt
Frank Grünwald
Thomas J. Vogl
Publication date
01-12-2016
Publisher
BioMed Central
Published in
European Journal of Medical Research / Issue 1/2016
Electronic ISSN: 2047-783X
DOI
https://doi.org/10.1186/s40001-016-0195-z

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