ID 113419
Title Alternative
Effect of malnutrition on FDG PET
Author
Terazawa, Kaori Tokushima University
Kondo, Mihoko Tokushima University
Arai, Yuta Tokushima University
Yamanaka, Moriaki Tokushima University
Keywords
Malnutrition
Hypoalbuminemia
Albumin
Liver
FDG
Content Type
Journal Article
Description
Objective
18F-FDG PET/CT is a hybrid imaging method widely used as a useful, noninvasive imaging modality for evaluating various neoplastic diseases. When assessing the tumor uptake, the liver and the mediastinal blood pool are often used as a reference region. In daily clinical practice, the 18F-FDG uptake in the liver sometimes appears to decrease on PET images of patients with malnutrition. The purpose of this study was to investigate whether or not the liver 18F-FDG uptake is decreased in patients with malnutrition.
Methods
We retrospectively analyzed 246 patients who underwent 18F-FDG PET/CT from January 2018 to June 2018 and whose blood serum albumin was measured within 1 month of PET/CT. We compared the liver uptake and mediastinal blood uptake of patients with low serum albumin level (< 4.0 g/dl) and hypoalbuminemia (< 3.5 g/dl) with those with a normal serum albumin level (≥ 4.0 g/dl). Correlations between the liver and mediastinal blood uptake and the serum albumin level were also calculated.
Results
The maximum standardized uptake value (SUVmax) and mean standardized uptake value (SUVmean) of the liver in 117 patients with low serum albumin were 3.1 ± 0.5 and 2.3 ± 0.3, respectively, while they were 2.9 ± 0.4, 2.0 ± 0.3 in 29 patients with hypoalbuminemia; these values were all significantly lower than the respective ones (3.4 ± 0.5, 2.5 ± 0.4) in 129 patients with normal serum albumin (all p < 0.001). The SUVmean of the mediastinal blood uptake in patients with hypoalbuminemia and normal serum albumin were 1.6 ± 0.2 and 1.7 ± 0.3, respectively (p = 0.053). The serum albumin level demonstrated a significantly positive, moderate correlation with the liver SUVmean, showing a regression line of y = 0.31x + 1.1 (r = 0.41, p < 0.001).
Conclusion
The liver 18F-FDG uptake tended to decrease in patients with hypoalbuminemia. In the patients with malnutrition, the mediastinal blood pool may be more stable reference than the liver for evaluating the tumor activity because hypoalbuminemia is considered to less strongly influence the mediastinal blood pool than that in the liver.
Journal Title
Annals of Nuclear Medicine
ISSN
09147187
18646433
NCID
AA10708017
AA12431785
Publisher
The Japanese Society of Nuclear Medicine|Springer Singapore
Volume
33
Issue
9
Start Page
689
End Page
696
Published Date
2019-06-14
Remark
The final publication is available at link.springer.com
論文本文は2020-06-14以降公開予定
DOI (Published Version)
URL ( Publisher's Version )
language
eng
TextVersion
その他
departments
University Hospital
Medical Sciences