Quantificação do tecido adiposo visceral por tomografia computadorizada e ressonância magnética

Reprodutibilidade e acurácia

Translated title of the contribution: Quantification of visceral adipose tissue by computed tomography and magnetic resonance imaging: Reproducibility and accuracy

Lorenzo Carlo Pescatori, Edoardo Savarino, Giovanni Mauri, Enzo Silvestri, Maurizio Cariati, Francesco Sardanelli, Luca Maria Sconfienza

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Objective: To evaluate the feasibility of quantifying visceral adipose tissue (VAT) on computed tomography (CT) and magnetic resonance imaging (MRI) scans, using freeware, as well as calculating intraobserver and interobserver reproducibility. Materials and Methods: We quantified VAT in patients who underwent abdominal CT and MRI at our institution between 2010 and 2015, with a maximum of three months between the two examinations. A slice acquired at the level of the umbilicus was selected. Segmentation was performed with the region growing algorithm of the freeware employed. Intraobserver and interobserver reproducibility were evaluated, as was the accuracy of MRI in relation to that of CT. Results: Thirty-one patients (14 males and 17 females; mean age of 57 ± 15 years) underwent CT and MRI (mean interval between the examinations, 28 ± 12 days). The interobserver reproducibility was 82% for CT (bias = 1.52 cm 2 ; p = 0.488), 86% for T1-weighted MRI (bias = −4.36 cm 2 ; p = 0.006), and 88% for T2-weighted MRI (bias = −0.52 cm 2 ; p = 0.735). The intraobserver reproducibility was 90% for CT (bias = 0.14 cm 2 ; p = 0.912), 92% for T1-weighted MRI (bias = −3,4 cm 2 ; p = 0.035), and 90% for T2-weighted MRI (bias = −0.30 cm 2 ; p = 0.887). The reproducibility between T1-weighted MRI and T2-weighted MRI was 87% (bias = −0.11 cm 2 ; p = 0.957). In comparison with the accuracy of CT, that of T1-weighted and T2-weighted MRI was 89% and 91%, respectively. Conclusion: The program employed can be used in order to quantify VAT on CT, T1-weighted MRI, and T2-weighted MRI scans. Overall, the accuracy of MRI (in comparison with that of CT) appears to be high, as do intraobserver and interobserver reproducibility. However, the quantification of VAT seems to be less reproducible in T1-weighted sequences.

Original languagePortuguese
Pages (from-to)1-6
Number of pages6
JournalRadiologia Brasileira
Volume52
Issue number1
DOIs
Publication statusPublished - Jan 1 2019

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Intra-Abdominal Fat
Tomography
Magnetic Resonance Imaging
Umbilicus

Keywords

  • Computer-assisted/methods
  • Image processing
  • Intra-abdominal fat
  • Magnetic resonance imaging
  • Reproducibility of results
  • Tomography
  • X-ray computed

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Quantificação do tecido adiposo visceral por tomografia computadorizada e ressonância magnética : Reprodutibilidade e acurácia. / Pescatori, Lorenzo Carlo; Savarino, Edoardo; Mauri, Giovanni; Silvestri, Enzo; Cariati, Maurizio; Sardanelli, Francesco; Sconfienza, Luca Maria.

In: Radiologia Brasileira, Vol. 52, No. 1, 01.01.2019, p. 1-6.

Research output: Contribution to journalArticle

@article{86bf48b88bcc4663a8a40faba92a7701,
title = "Quantifica{\cc}{\~a}o do tecido adiposo visceral por tomografia computadorizada e resson{\^a}ncia magn{\'e}tica: Reprodutibilidade e acur{\'a}cia",
abstract = "Objective: To evaluate the feasibility of quantifying visceral adipose tissue (VAT) on computed tomography (CT) and magnetic resonance imaging (MRI) scans, using freeware, as well as calculating intraobserver and interobserver reproducibility. Materials and Methods: We quantified VAT in patients who underwent abdominal CT and MRI at our institution between 2010 and 2015, with a maximum of three months between the two examinations. A slice acquired at the level of the umbilicus was selected. Segmentation was performed with the region growing algorithm of the freeware employed. Intraobserver and interobserver reproducibility were evaluated, as was the accuracy of MRI in relation to that of CT. Results: Thirty-one patients (14 males and 17 females; mean age of 57 ± 15 years) underwent CT and MRI (mean interval between the examinations, 28 ± 12 days). The interobserver reproducibility was 82{\%} for CT (bias = 1.52 cm 2 ; p = 0.488), 86{\%} for T1-weighted MRI (bias = −4.36 cm 2 ; p = 0.006), and 88{\%} for T2-weighted MRI (bias = −0.52 cm 2 ; p = 0.735). The intraobserver reproducibility was 90{\%} for CT (bias = 0.14 cm 2 ; p = 0.912), 92{\%} for T1-weighted MRI (bias = −3,4 cm 2 ; p = 0.035), and 90{\%} for T2-weighted MRI (bias = −0.30 cm 2 ; p = 0.887). The reproducibility between T1-weighted MRI and T2-weighted MRI was 87{\%} (bias = −0.11 cm 2 ; p = 0.957). In comparison with the accuracy of CT, that of T1-weighted and T2-weighted MRI was 89{\%} and 91{\%}, respectively. Conclusion: The program employed can be used in order to quantify VAT on CT, T1-weighted MRI, and T2-weighted MRI scans. Overall, the accuracy of MRI (in comparison with that of CT) appears to be high, as do intraobserver and interobserver reproducibility. However, the quantification of VAT seems to be less reproducible in T1-weighted sequences.",
keywords = "Computer-assisted/methods, Image processing, Intra-abdominal fat, Magnetic resonance imaging, Reproducibility of results, Tomography, X-ray computed",
author = "Pescatori, {Lorenzo Carlo} and Edoardo Savarino and Giovanni Mauri and Enzo Silvestri and Maurizio Cariati and Francesco Sardanelli and Sconfienza, {Luca Maria}",
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T1 - Quantificação do tecido adiposo visceral por tomografia computadorizada e ressonância magnética

T2 - Reprodutibilidade e acurácia

AU - Pescatori, Lorenzo Carlo

AU - Savarino, Edoardo

AU - Mauri, Giovanni

AU - Silvestri, Enzo

AU - Cariati, Maurizio

AU - Sardanelli, Francesco

AU - Sconfienza, Luca Maria

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Objective: To evaluate the feasibility of quantifying visceral adipose tissue (VAT) on computed tomography (CT) and magnetic resonance imaging (MRI) scans, using freeware, as well as calculating intraobserver and interobserver reproducibility. Materials and Methods: We quantified VAT in patients who underwent abdominal CT and MRI at our institution between 2010 and 2015, with a maximum of three months between the two examinations. A slice acquired at the level of the umbilicus was selected. Segmentation was performed with the region growing algorithm of the freeware employed. Intraobserver and interobserver reproducibility were evaluated, as was the accuracy of MRI in relation to that of CT. Results: Thirty-one patients (14 males and 17 females; mean age of 57 ± 15 years) underwent CT and MRI (mean interval between the examinations, 28 ± 12 days). The interobserver reproducibility was 82% for CT (bias = 1.52 cm 2 ; p = 0.488), 86% for T1-weighted MRI (bias = −4.36 cm 2 ; p = 0.006), and 88% for T2-weighted MRI (bias = −0.52 cm 2 ; p = 0.735). The intraobserver reproducibility was 90% for CT (bias = 0.14 cm 2 ; p = 0.912), 92% for T1-weighted MRI (bias = −3,4 cm 2 ; p = 0.035), and 90% for T2-weighted MRI (bias = −0.30 cm 2 ; p = 0.887). The reproducibility between T1-weighted MRI and T2-weighted MRI was 87% (bias = −0.11 cm 2 ; p = 0.957). In comparison with the accuracy of CT, that of T1-weighted and T2-weighted MRI was 89% and 91%, respectively. Conclusion: The program employed can be used in order to quantify VAT on CT, T1-weighted MRI, and T2-weighted MRI scans. Overall, the accuracy of MRI (in comparison with that of CT) appears to be high, as do intraobserver and interobserver reproducibility. However, the quantification of VAT seems to be less reproducible in T1-weighted sequences.

AB - Objective: To evaluate the feasibility of quantifying visceral adipose tissue (VAT) on computed tomography (CT) and magnetic resonance imaging (MRI) scans, using freeware, as well as calculating intraobserver and interobserver reproducibility. Materials and Methods: We quantified VAT in patients who underwent abdominal CT and MRI at our institution between 2010 and 2015, with a maximum of three months between the two examinations. A slice acquired at the level of the umbilicus was selected. Segmentation was performed with the region growing algorithm of the freeware employed. Intraobserver and interobserver reproducibility were evaluated, as was the accuracy of MRI in relation to that of CT. Results: Thirty-one patients (14 males and 17 females; mean age of 57 ± 15 years) underwent CT and MRI (mean interval between the examinations, 28 ± 12 days). The interobserver reproducibility was 82% for CT (bias = 1.52 cm 2 ; p = 0.488), 86% for T1-weighted MRI (bias = −4.36 cm 2 ; p = 0.006), and 88% for T2-weighted MRI (bias = −0.52 cm 2 ; p = 0.735). The intraobserver reproducibility was 90% for CT (bias = 0.14 cm 2 ; p = 0.912), 92% for T1-weighted MRI (bias = −3,4 cm 2 ; p = 0.035), and 90% for T2-weighted MRI (bias = −0.30 cm 2 ; p = 0.887). The reproducibility between T1-weighted MRI and T2-weighted MRI was 87% (bias = −0.11 cm 2 ; p = 0.957). In comparison with the accuracy of CT, that of T1-weighted and T2-weighted MRI was 89% and 91%, respectively. Conclusion: The program employed can be used in order to quantify VAT on CT, T1-weighted MRI, and T2-weighted MRI scans. Overall, the accuracy of MRI (in comparison with that of CT) appears to be high, as do intraobserver and interobserver reproducibility. However, the quantification of VAT seems to be less reproducible in T1-weighted sequences.

KW - Computer-assisted/methods

KW - Image processing

KW - Intra-abdominal fat

KW - Magnetic resonance imaging

KW - Reproducibility of results

KW - Tomography

KW - X-ray computed

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