Functional imaging of the parotid glands using blood oxygenation level dependent (BOLD)-MRI at 1.5T and 3T

Simon-Zoula, Sonia C; Boesch, Chris; De Keyzer, Frederik; Thoeny, Harriet C (2008). Functional imaging of the parotid glands using blood oxygenation level dependent (BOLD)-MRI at 1.5T and 3T. Journal of magnetic resonance imaging, 27(1), pp. 43-8. Hoboken, N.J.: Wiley Interscience 10.1002/jmri.21071

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PURPOSE: To evaluate the function of the parotid glands before and during gustatory stimulation, using an intrinsic susceptibility-weighted MRI method (blood oxygenation level dependent, BOLD-MRI) at 1.5T and 3T. MATERIALS AND METHODS: A total of 10 and 13 volunteers were investigated at 1.5T and 3T, respectively. Measurements were performed before and during gustatory stimulation using ascorbate. Circular regions of interest (ROIs) were delineated in the left and right parotid glands, and in the masseter muscle for comparison. The effects of stimulation were evaluated by calculating the difference between the relaxation rates, DeltaR(2)*. Baseline and stimulation were statistically compared (Student's t-tests), merging both parotid glands. RESULTS: The averaged DeltaR(2)* values prestimulation obtained in all parotid glands were stable (-0.61 to 0.38 x 10(-3) seconds(-1)). At 3T, these values were characterized by an initial drop (to -2.7 x 10(-3) seconds(-1)) followed by a progressive increase toward the baseline. No significant difference was observed between baseline and parotid gland stimulation at 1.5T, neither for the masseter muscle at both field strengths. A considerable interindividual variability (over 76%) was noticed at both magnetic fields. CONCLUSION: BOLD-MRI at 3T was able to detect DeltaR(2)* changes in the parotid glands during gustatory stimulation, consistent with an increase in oxygen consumption during saliva production.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic, Interventional and Paediatric Radiology 04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic, Interventional and Paediatric Radiology > DCR Magnetic Resonance Spectroscopy and Methodology (AMSM)
UniBE Contributor:	Simon Zoula, Sonia, Boesch, Christoph Hans, Thöny, Harriet C.
ISSN:	1053-1807
ISBN:	18050322
Publisher:	Wiley Interscience
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:58
Last Modified:	02 Mar 2023 23:22
Publisher DOI:	10.1002/jmri.21071
PubMed ID:	18050322
Web of Science ID:	000252104100007
URI:	https://boris.unibe.ch/id/eprint/24993 (FactScience: 54411)