Abstract
Objectives
Although it is important to quantify the degree of fatty degeneration of the pancreas, it is difficult to make such a quantification using conventional computed tomography (CT). The present study evaluated the feasibility of pancreatic fat quantification by dual-energy CT (DECT) compared with T2*-corrected six-point Dixon magnetic resonance imaging (MRI).
Materials and methods
Twenty-eight patients who underwent both DECT (100 and 150 kVp) and Dixon MRI without the use of contrast agents were analyzed. The region of interest (ROI) was placed at the head and body/tail of the pancreas on fat volume fraction (FVF) maps generated using the multi-material decomposition (MMD) algorithm on DECT. The FVF (%) of pancreatic parenchyma measured by DECT (CT-FVF) was compared with that measured on FVF maps calculated using Dixon MRI (MR-FVF) using the Spearman rank correlation coefficient.
Results
The median CT-FVF (%) values of the head and body/tail of the pancreas on DECT were 14.2% (range 0.1–81.2%) and 9.4% (range 0–40.8%), respectively. The median MR-FVF (%) values of the head and body/tail of the pancreas on Dixon MRI were 12.2% (range 1.2–80.9%) and 8.1% (range 0.3–43.7%), respectively. CT-FVF (%) measured by DECT showed a significant correlation with the MR-FVF (%) measured by Dixon MRI in the head of the pancreas (ρ = 0.631, P < 0.001) as well as the body/tail of the pancreas (ρ = 0.526, P = 0.004).
Conclusion
DECT may be useful for quantifying the degree of fatty degeneration of the pancreas.
Similar content being viewed by others
Abbreviations
- DECT:
-
Dual-energy computed tomography
- MRI:
-
Magnetic resonance imaging
- ROI:
-
Region of interest
- FVF:
-
Fat volume fraction
References
Tchernof A, Despres JP (2013) Pathophysiology of human visceral obesity: an update. Physiological Reviews 93:359-404
Fox CS, Massaro JM, Hoffmann U et al (2007) Abdominal visceral and subcutaneous adipose tissue compartments: association with metabolic risk factors in the Framingham Heart Study. Circulation 116:39-48
Wong VW, Wong GL, Yeung DK et al (2014) Fatty pancreas, insulin resistance, and beta-cell function: a population study using fat-water magnetic resonance imaging. American Journal of Gastroenterology 109:589-597
Tushuizen ME, Bunck MC, Pouwels PJ et al (2007) Pancreatic fat content and beta-cell function in men with and without type 2 diabetes. Diabetes Care 30:2916-2921
Lingvay I, Esser V, Legendre JL et al (2009) Noninvasive quantification of pancreatic fat in humans. Journal of Clinical Endocrinology and Metabolism 94:4070-4076
Hu HH, Kim HW, Nayak KS, Goran MI (2010) Comparison of fat-water MRI and single-voxel MRS in the assessment of hepatic and pancreatic fat fractions in humans. Obesity (Silver Spring) 18:841-847
Kuhn JP, Hernando D, Munoz del Rio A et al (2012) Effect of multipeak spectral modeling of fat for liver iron and fat quantification: correlation of biopsy with MR imaging results. Radiology 265:133-142
Meisamy S, Hines CD, Hamilton G et al (2011) Quantification of hepatic steatosis with T1-independent, T2-corrected MR imaging with spectral modeling of fat: blinded comparison with MR spectroscopy. Radiology 258:767-775
Yokoo T, Shiehmorteza M, Hamilton G et al (2011) Estimation of hepatic proton-density fat fraction by using MR imaging at 3.0 T. Radiology 258:749-759
Kuhn JP, Berthold F, Mayerle J et al (2015) Pancreatic Steatosis Demonstrated at MR Imaging in the General Population: Clinical Relevance. Radiology 276:129-136
Kodama Y, Ng CS, Wu TT et al (2007) Comparison of CT methods for determining the fat content of the liver. AJR: American Journal of Roentgenology 188:1307-1312
Limanond P, Raman SS, Lassman C et al (2004) Macrovesicular hepatic steatosis in living related liver donors: correlation between CT and histologic findings. Radiology 230:276-280
Fischer MA, Gnannt R, Raptis D et al (2011) Quantification of liver fat in the presence of iron and iodine: an ex-vivo dual-energy CT study. Investigative Radiology 46:351-358
Hyodo T, Hori M, Lamb P et al (2017) Multimaterial Decomposition Algorithm for the Quantification of Liver Fat Content by Using Fast-Kilovolt-Peak Switching Dual-Energy CT: Experimental Validation. Radiology 282:381-389
Hyodo T, Yada N, Hori M et al (2017) Multimaterial Decomposition Algorithm for the Quantification of Liver Fat Content by Using Fast-Kilovolt-Peak Switching Dual-Energy CT: Clinical Evaluation. Radiology 283:108-118
Navina S, Acharya C, DeLany JP et al (2011) Lipotoxicity causes multisystem organ failure and exacerbates acute pancreatitis in obesity. Science Translational Medicine 3:107ra110
Heni M, Machann J, Staiger H et al (2010) Pancreatic fat is negatively associated with insulin secretion in individuals with impaired fasting glucose and/or impaired glucose tolerance: a nuclear magnetic resonance study. Diabetes/Metabolism Research and Reviews 26:200-205
Yokota K, Fukushima M, Takahashi Y, Igaki N, Seino S (2012) Insulin secretion and computed tomography values of the pancreas in the early stage of the development of diabetes. J Diabetes Investig 3:371-376
Hoff FL, H G, NA H, RM G (2008) Pancreas: normal anatomy and examination techniques. In: Gore RM, Levine MS, eds. Textbook of gastrointestinal radiology Philadelphia, Pa: Saunders:1839–1853
Ricci C, Longo R, Gioulis E et al (1997) Noninvasive in vivo quantitative assessment of fat content in human liver. Journal of Hepatology 27:108-113
Sanyal AJ (2002) AGA technical review on nonalcoholic fatty liver disease. Gastroenterology 123:1705-1725
Zinreich SJ, Kennedy DW, Malat J et al (1988) Fungal sinusitis: diagnosis with CT and MR imaging. Radiology 169:439-444
Ly JN, Miller FH (2002) MR imaging of the pancreas: a practical approach. Radiologic Clinics of North America 40:1289-1306
Kim SY, Kim H, Cho JY et al (2014) Quantitative assessment of pancreatic fat by using unenhanced CT: pathologic correlation and clinical implications. Radiology 271:104-112
Henninger B, Zoller H, Kannengiesser S, Zhong X, Jaschke W, Kremser C (2017) 3D Multiecho Dixon for the Evaluation of Hepatic Iron and Fat in a Clinical Setting. 46:793–800
Yoon JH, Lee JM, Lee KB et al (2016) Pancreatic Steatosis and Fibrosis: Quantitative Assessment with Preoperative Multiparametric MR Imaging. Radiology 279:140-150
Funding
No funding.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
Ethics approval
This study was approved by the institutional review board, and informed consent was waived.
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Kameda, F., Tanabe, M., Onoda, H. et al. Quantification of pancreas fat on dual-energy computed tomography: comparison with six-point Dixon magnetic resonance imaging. Abdom Radiol 45, 2779–2785 (2020). https://doi.org/10.1007/s00261-020-02583-7
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00261-020-02583-7