HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Full Text (PDF) Submit a response Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Williams, R. L. Articles by Weissman, J. L. Search for Related Content PubMed PubMed Citation Articles by Williams, R. L. Articles by Weissman, J. L.

MR Imaging of Intraventricular Silicone: Case Report¹

¹ From the Departments of Radiology (R.L.W., E.K., J.L.W.), Ophthalmology (R.L.B.), and Otolaryngology (J.L.W.), University of Pittsburgh Medical Center, Rm D132PUH, 200 Lothrop St, Pittsburgh, PA 15213. Received March 26, 1998; revision requested June 24; revision received September 18; accepted December 8. Address reprint requests to R.L.W. (e-mail: williamsrl@radserv.arad.upmc.edu).

View larger version (166K): [in a new window]   Figure 1a. (a, b) Sagittal T1-weighted spin-echo MR images (566/14) demonstrate (a) intraocular silicone (S), which is hyperintense when compared with normal vitreous, and (b) intraventricular silicone (arrow), which is hyperintense when compared with cerebrospinal fluid. (c, d) Axial T2-weighted fat-saturated fast spin-echo MR images (2,500/104) demonstrate hypointense signal in (c) the silicone (S) in the left globe and (d) the silicone (arrow) in the left lateral ventricle.

View larger version (153K): [in a new window]   Figure 1b. (a, b) Sagittal T1-weighted spin-echo MR images (566/14) demonstrate (a) intraocular silicone (S), which is hyperintense when compared with normal vitreous, and (b) intraventricular silicone (arrow), which is hyperintense when compared with cerebrospinal fluid. (c, d) Axial T2-weighted fat-saturated fast spin-echo MR images (2,500/104) demonstrate hypointense signal in (c) the silicone (S) in the left globe and (d) the silicone (arrow) in the left lateral ventricle.

View larger version (132K): [in a new window]   Figure 1c. (a, b) Sagittal T1-weighted spin-echo MR images (566/14) demonstrate (a) intraocular silicone (S), which is hyperintense when compared with normal vitreous, and (b) intraventricular silicone (arrow), which is hyperintense when compared with cerebrospinal fluid. (c, d) Axial T2-weighted fat-saturated fast spin-echo MR images (2,500/104) demonstrate hypointense signal in (c) the silicone (S) in the left globe and (d) the silicone (arrow) in the left lateral ventricle.

View larger version (132K): [in a new window]   Figure 1d. (a, b) Sagittal T1-weighted spin-echo MR images (566/14) demonstrate (a) intraocular silicone (S), which is hyperintense when compared with normal vitreous, and (b) intraventricular silicone (arrow), which is hyperintense when compared with cerebrospinal fluid. (c, d) Axial T2-weighted fat-saturated fast spin-echo MR images (2,500/104) demonstrate hypointense signal in (c) the silicone (S) in the left globe and (d) the silicone (arrow) in the left lateral ventricle.

View larger version (163K): [in a new window]   Figure 2a. (a, b) Axial intermediate-weighted MR images (2,333/15) demonstrate (a) silicone (S) in the left globe, which is slightly hyperintense when compared with normal vitreous, and (b) similar signal intensity (arrow) and chemical shift artifact (arrowheads) in the silicone in the left lateral ventricle. Only chemical shift artifact is seen from the silicone in the right lateral ventricle. (c, d) Axial intermediate-weighted images (2,366/39) obtained with the low bandwidth technique and with interchanged phase and frequency directions show that (c) the hyper- and hypointense bands of signal (arrows) from chemical shift artifact adjacent to the silicone (S) in the left globe have changed in direction and are more apparent. (d) The chemical shift artifact at the lateral ventricles is identical to the artifact seen in the globe. The magnitude of the chemical shift (arrows) was measured and was used to calculate the frequency shift in Hertz. (e) Sagittal T1-weighted image (500/14) demonstrates silicone within or adjacent to the intracranial left optic nerve and chiasm (arrow).

View larger version (160K): [in a new window]   Figure 2c. (a, b) Axial intermediate-weighted MR images (2,333/15) demonstrate (a) silicone (S) in the left globe, which is slightly hyperintense when compared with normal vitreous, and (b) similar signal intensity (arrow) and chemical shift artifact (arrowheads) in the silicone in the left lateral ventricle. Only chemical shift artifact is seen from the silicone in the right lateral ventricle. (c, d) Axial intermediate-weighted images (2,366/39) obtained with the low bandwidth technique and with interchanged phase and frequency directions show that (c) the hyper- and hypointense bands of signal (arrows) from chemical shift artifact adjacent to the silicone (S) in the left globe have changed in direction and are more apparent. (d) The chemical shift artifact at the lateral ventricles is identical to the artifact seen in the globe. The magnitude of the chemical shift (arrows) was measured and was used to calculate the frequency shift in Hertz. (e) Sagittal T1-weighted image (500/14) demonstrates silicone within or adjacent to the intracranial left optic nerve and chiasm (arrow).

View larger version (157K): [in a new window]   Figure 2e. (a, b) Axial intermediate-weighted MR images (2,333/15) demonstrate (a) silicone (S) in the left globe, which is slightly hyperintense when compared with normal vitreous, and (b) similar signal intensity (arrow) and chemical shift artifact (arrowheads) in the silicone in the left lateral ventricle. Only chemical shift artifact is seen from the silicone in the right lateral ventricle. (c, d) Axial intermediate-weighted images (2,366/39) obtained with the low bandwidth technique and with interchanged phase and frequency directions show that (c) the hyper- and hypointense bands of signal (arrows) from chemical shift artifact adjacent to the silicone (S) in the left globe have changed in direction and are more apparent. (d) The chemical shift artifact at the lateral ventricles is identical to the artifact seen in the globe. The magnitude of the chemical shift (arrows) was measured and was used to calculate the frequency shift in Hertz. (e) Sagittal T1-weighted image (500/14) demonstrates silicone within or adjacent to the intracranial left optic nerve and chiasm (arrow).

View larger version (160K): [in a new window]   Figure 2b. (a, b) Axial intermediate-weighted MR images (2,333/15) demonstrate (a) silicone (S) in the left globe, which is slightly hyperintense when compared with normal vitreous, and (b) similar signal intensity (arrow) and chemical shift artifact (arrowheads) in the silicone in the left lateral ventricle. Only chemical shift artifact is seen from the silicone in the right lateral ventricle. (c, d) Axial intermediate-weighted images (2,366/39) obtained with the low bandwidth technique and with interchanged phase and frequency directions show that (c) the hyper- and hypointense bands of signal (arrows) from chemical shift artifact adjacent to the silicone (S) in the left globe have changed in direction and are more apparent. (d) The chemical shift artifact at the lateral ventricles is identical to the artifact seen in the globe. The magnitude of the chemical shift (arrows) was measured and was used to calculate the frequency shift in Hertz. (e) Sagittal T1-weighted image (500/14) demonstrates silicone within or adjacent to the intracranial left optic nerve and chiasm (arrow).

View larger version (172K): [in a new window]   Figure 2d. (a, b) Axial intermediate-weighted MR images (2,333/15) demonstrate (a) silicone (S) in the left globe, which is slightly hyperintense when compared with normal vitreous, and (b) similar signal intensity (arrow) and chemical shift artifact (arrowheads) in the silicone in the left lateral ventricle. Only chemical shift artifact is seen from the silicone in the right lateral ventricle. (c, d) Axial intermediate-weighted images (2,366/39) obtained with the low bandwidth technique and with interchanged phase and frequency directions show that (c) the hyper- and hypointense bands of signal (arrows) from chemical shift artifact adjacent to the silicone (S) in the left globe have changed in direction and are more apparent. (d) The chemical shift artifact at the lateral ventricles is identical to the artifact seen in the globe. The magnitude of the chemical shift (arrows) was measured and was used to calculate the frequency shift in Hertz. (e) Sagittal T1-weighted image (500/14) demonstrates silicone within or adjacent to the intracranial left optic nerve and chiasm (arrow).