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Susceptibility-Weighted MRI of Endometrioma: Preliminary Results

¹ All authors: Department of Radiology, University of Tokushima, 3-18-15, Kuramoto-cho, Tokushima, 7708503, Japan.

View larger version (139K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1A —46-year-old woman with right-sided ovarian endometrioma. Axial T2*-weighted 1.5-T MR image (TR/TE, 650/30; flip angle, 20°) shows combination of punctate and curved linear signal voids (arrowheads) along cyst wall.

View larger version (153K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1B —46-year-old woman with right-sided ovarian endometrioma. Axial susceptibility-weighted 1.5-T MR image (650/30; flip angle, 20°) shows signal voids (arrowheads) more prominent than in A.

View larger version (119K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2 —40-year-old woman with left-sided ovarian endometrioma. Lesion had high signal intensity on both T1- and T2-weighted images. Axial susceptibility-weighted 1.5-T MR image (TR/TE, 700/30; flip angle, 20°) shows curved linear signal voids (arrowheads) along cyst wall.

View larger version (141K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3A —47-year-old woman with right-sided ovarian endometrioma. Axial fat-saturated spin-echo T1-weighted MR image (TR/TE, 600/7.9) shows predominantly hypointense bilocular cystic mass (arrows). Small hyperintense areas (arrowheads) suggest presence of hemorrhagic foci within cyst wall.

View larger version (135K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3B —47-year-old woman with right-sided ovarian endometrioma. Axial fast spin-echo T2-weighted MR image (4,000/98.1) shows no shading (arrow).

View larger version (124K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3C —47-year-old woman with right-sided ovarian endometrioma. Axial susceptibility-weighted 3-T MR image (700/30; flip angle, 15°) (C) shows punctate signal voids (arrows) along cyst wall more prominently than does axial susceptibility-weighted 1.5-T image (700/30; flip angle, 20°) (D). Susceptibility artifacts (arrowheads) caused by rectal gas also are more prominent in C.

View larger version (133K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3D —47-year-old woman with right-sided ovarian endometrioma. Axial susceptibility-weighted 3-T MR image (700/30; flip angle, 15°) (C) shows punctate signal voids (arrows) along cyst wall more prominently than does axial susceptibility-weighted 1.5-T image (700/30; flip angle, 20°) (D). Susceptibility artifacts (arrowheads) caused by rectal gas also are more prominent in C.

View larger version (137K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 4A —37-year-old woman with right-sided ovarian mucinous cystadenoma. Axial fat-saturated spin-echo T1-weighted (TR/TE, 466.7/7.6) (A) and fast spin-echo T2-weighted (4,000/99.3) (B) MR images show multilocular cystic mass (arrows) with varying signal intensities. U = uterus.

View larger version (144K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 4B —37-year-old woman with right-sided ovarian mucinous cystadenoma. Axial fat-saturated spin-echo T1-weighted (TR/TE, 466.7/7.6) (A) and fast spin-echo T2-weighted (4,000/99.3) (B) MR images show multilocular cystic mass (arrows) with varying signal intensities. U = uterus.

View larger version (141K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 4C —37-year-old woman with right-sided ovarian mucinous cystadenoma. Axial susceptibility-weighted 1.5-T MR image (675/30; flip angle, 20°) shows no signal voids along cyst wall (arrows). Decrease in signal intensity (asterisk) due to susceptibility artifact caused by adjacent intestinal gas is evident.

View larger version (128K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 5A —39-year-old woman with left-sided ovarian endometrioma. Axial fast spin-echo T2-weighted MR image (TR/TE, 7,000/100.9) shows mass (arrow) is completely hypointense.

View larger version (129K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 5B —39-year-old woman with left-sided ovarian endometrioma. Axial susceptibility-weighted 3-T MR image (700/30; flip angle, 15°) shows completely hypointense mass (arrow). Presence of signal voids along cyst wall cannot be evaluated. Susceptibility artifacts caused by intestinal gas are prominent.

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