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, Toru Chikui, DDS, PhD Search for other works by this author on: Oxford Academic Yasuo Yamash*ta, RT, PhD Department of Medical Technology, Kyushu University Hospital , f*ckuoka , Japan Search for other works by this author on: Oxford Academic Yosh*taka Kise, DDS, PhD Department of Oral and Maxillofacial Radiology, School of Dentistry, Aichi Gakuin University , Nagoya , Japan Search for other works by this author on: Oxford Academic Tomonori Saito, RT Department of Medical Technology, Kyushu University Hospital , f*ckuoka , Japan Search for other works by this author on: Oxford Academic Kazutoshi Okamura, DDS, PhD Department of Oral and Maxillofacial Radiology, Faculty of Dental Science, Kyushu University , f*ckuoka , Japan Search for other works by this author on: Oxford Academic Kazunori Yoshiura, DDS, PhD Department of Oral and Maxillofacial Radiology, Faculty of Dental Science, Kyushu University , f*ckuoka , Japan Search for other works by this author on: Oxford Academic
British Journal of Radiology, Volume 91, Issue 1085, 1 May 2018, 20170671, https://doi.org/10.1259/bjr.20170671
Published:
06 February 2018
Article history
Received:
05 September 2017
Revision received:
26 December 2017
Revision received:
22 January 2018
Accepted:
23 January 2018
Published:
06 February 2018
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Toru Chikui, Yasuo Yamash*ta, Yosh*taka Kise, Tomonori Saito, Kazutoshi Okamura, Kazunori Yoshiura, Estimation of proton density fat fraction of the salivary gland, British Journal of Radiology, Volume 91, Issue 1085, 1 May 2018, 20170671, https://doi.org/10.1259/bjr.20170671
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Objective:
Our first objective was to prove the validity of the six-point Dixon method for estimating the proton density fat fraction (PDFF) of the salivary gland. The second objective was to estimate the salivary gland PDFF using Dixon method to evaluate the pathological conditions.
Methods:
At first, 12 volunteers underwent two types of sequences: single-voxel magnetic resonance spectroscopy and the Dixon method and the PDFFs obtained by the two methods were compared. Next, a total of 67 individuals [normal, n = 46; Sjögren’s syndrome (SS), n = 11; and IgG4-related dacryoadenitis and sialadenitis (IgG4-DS), n = 4, parotitis, n = 6] were enrolled to estimate the parotid gland (PG) and submandibular gland (SMG) PDFF using the Dixon method.
Results:
This volunteer study demonstrated excellent correlation between two methods (R 2 = 0.964, slope = 1.05). In the normal group, the PG-PDFF was correlated with the weight and body mass index (BMI) (ρ = 0.38, p = 0.0085; and ρ = 0.63, p < 0.0001). The SMG-PDFF was also correlated with the weight, BMI, and serum triglyceride (ρ = 0.37, p = 0.0067; ρ = 0.42, p = 0.0022; and ρ = 0.35, p = 0.024). The PG-PDFF of the SS group (48.2 ± 15.1%) was higher than that of any other groups; however, no significant difference was found due to the wide overlap. The SS group (39.0 ± 26.14%) also had significantly higher SMG-PDFF than the normal group (8.9 ± 5.4%), p < 0.0001) and IgG4-DS group (3.8 ± 2.3%), p = 0.020).
Conclusion:
The Dixon method is a feasible method for estimating the PDFF and demonstrates fat accumulation in SMG in the SS group.
Advances in knowledge:
The PDFF obtained by the Dixon method is helpful for understanding the salivary gland pathological condition.
© 2018 The Authors. Published by the British Institute of Radiology
This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model)
Subject
Head and Neck
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