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Effect of hyoscine butylbromide (HBB) on the uterine corpus: Quantitative assessment with T2‐weighted (T2W) MRI in healthy volunteers
Author(s) -
Fujimoto Koji,
Nakai Asako,
Okada Tomohisa,
Ikeuchi Takashi,
Satogami Naoe,
Daido Sayaka,
Yakami Masahiro,
Togashi Kaori
Publication year - 2010
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.22252
Subject(s) - medicine , t2 weighted , nuclear medicine , radiology , magnetic resonance imaging
Purpose: To investigate effects of hyoscine butylbromide (HBB) on the appearance of three zonal anatomy of the uterine corpus on T2‐weighted images (T2WI). Materials and Methods: Sagittal T2WI of the pelvis were acquired before and after intramuscular administration of HBB with interval of 10 minutes in 22 healthy volunteers. By drawing polygonal regions of interest (ROIs), the uterine corpus was delineated into outer myometrium (OM), junctional zone (JZ), and endometrium (EM) in 20 subjects. Areas (mm 2 ) and relative signal intensity (rSI) of each layer were compared between pre‐HBB and post‐HBB administration images by using paired t ‐tests. Histogram analysis was conducted for the uterine layers and changes were visualized. Results: Areas of OM were significantly increased ( P = 0.014) and mean rSI of JZ and OM were significantly increased ( P = 0.007 and 0.001, respectively) after administration of HBB. Histogram showed an increase in the number of pixels with higher rSI in the OM, which was considered to be caused by an increase in interstitial fluid and vascular dilatation. EM did not show significant changes. Conclusion: Layer‐wise ROI analyses demonstrated changes in the area and rSI in T2WI of the uterus after HBB administration. Histogram analysis contributed to the investigation of signal changes. J. Magn. Reson. Imaging 2010;32:441–445. © 2010 Wiley‐Liss, Inc.