open access

Vol 23, No 2 (2020)
Research paper
Submitted: 2020-05-03
Accepted: 2020-05-22
Published online: 2020-07-31
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Patterns of vascular graft infection in 18F-FDG PET/CT

Beata E. Chrapko1, Marek Chrapko2, Anna Nocuń1, Tomasz Zubilewicz2, Bogusław Stefaniak1, Jakub Mitura1, Andrzej Wolski3, Piotr Terelecki2
·
Pubmed: 33007092
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Nucl. Med. Rev 2020;23(2):63-70.
Affiliations
  1. Chair and Department of Nuclear Medicine, Medical University of Lublin
  2. Chair and Department of Vascular Surgery and Angiology, Medical University of Lublin
  3. Chair and Department of Interventional Radiology and Neuroradiology, Medical University of Lublin

open access

Vol 23, No 2 (2020)
Original articles
Submitted: 2020-05-03
Accepted: 2020-05-22
Published online: 2020-07-31

Abstract

BACKGROUND: 18F-FDG PET/CT has become an important tool in diagnosis of prosthetic vascular graft infections (PVGI). The aim of the study was to identify the patterns of vascular graft infection in 18F-FDG PET/CT. MATERIAL AND METHODS: The study was performed in 24 patients with vascular graft infection, in 17 patients implanted in an open surgery mode and in 7 patients by endovascular aortic repair (EVAR). Vascular prostheses were evaluated by two visual scales and semi-quantitative analysis with maximum standardized uptake values (SUV max). RESULTS: In the 3-point scale: 23 patients were in grade 1 and one patient was in grade 2. In the 5-point scale: 19 patients were in grade 5 with the highest activity in the focal area, 4 patients were in grade 4 and one patient in grade 3. The visual evaluation of 18F-FDG PET/CT study revealed that peri-graft high metabolic activity was associated with occurrence of morphological abnormalities (n = 21) like gas bubbles and peri-graft fluid retention or without abnormal CT findings (n = 3). The presence of the gas bubbles was linked to higher uptake of 18F-FDG (p < 0.01, SUVmax 11.81 ± 4.35 vs 7.36 ± 2.80, 15 vs 9 pts). In EVAR procedure, the highest metabolic activity was greater than in classical prosthesis (SUVmax 21.5 vs 13). CONCLUSIONS: 18F-FDG PET/CT is a very useful tool for assessment of vascular graft infections. CT findings like gas bubbles, or peri-graft fluid retention were associated with significantly higher glucose metabolism; however, in some cases without anatomic alterations, increased metabolic activity was the only sign of infection.

Abstract

BACKGROUND: 18F-FDG PET/CT has become an important tool in diagnosis of prosthetic vascular graft infections (PVGI). The aim of the study was to identify the patterns of vascular graft infection in 18F-FDG PET/CT. MATERIAL AND METHODS: The study was performed in 24 patients with vascular graft infection, in 17 patients implanted in an open surgery mode and in 7 patients by endovascular aortic repair (EVAR). Vascular prostheses were evaluated by two visual scales and semi-quantitative analysis with maximum standardized uptake values (SUV max). RESULTS: In the 3-point scale: 23 patients were in grade 1 and one patient was in grade 2. In the 5-point scale: 19 patients were in grade 5 with the highest activity in the focal area, 4 patients were in grade 4 and one patient in grade 3. The visual evaluation of 18F-FDG PET/CT study revealed that peri-graft high metabolic activity was associated with occurrence of morphological abnormalities (n = 21) like gas bubbles and peri-graft fluid retention or without abnormal CT findings (n = 3). The presence of the gas bubbles was linked to higher uptake of 18F-FDG (p < 0.01, SUVmax 11.81 ± 4.35 vs 7.36 ± 2.80, 15 vs 9 pts). In EVAR procedure, the highest metabolic activity was greater than in classical prosthesis (SUVmax 21.5 vs 13). CONCLUSIONS: 18F-FDG PET/CT is a very useful tool for assessment of vascular graft infections. CT findings like gas bubbles, or peri-graft fluid retention were associated with significantly higher glucose metabolism; however, in some cases without anatomic alterations, increased metabolic activity was the only sign of infection.

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Keywords

fluorodeoxyglucose; PET/CT scan; vascular graft infections

About this article
Title

Patterns of vascular graft infection in 18F-FDG PET/CT

Journal

Nuclear Medicine Review

Issue

Vol 23, No 2 (2020)

Article type

Research paper

Pages

63-70

Published online

2020-07-31

Page views

1467

Article views/downloads

1507

DOI

10.5603/NMR.a2020.0015

Pubmed

33007092

Bibliographic record

Nucl. Med. Rev 2020;23(2):63-70.

Keywords

fluorodeoxyglucose
PET/CT scan
vascular graft infections

Authors

Beata E. Chrapko
Marek Chrapko
Anna Nocuń
Tomasz Zubilewicz
Bogusław Stefaniak
Jakub Mitura
Andrzej Wolski
Piotr Terelecki

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