Visibility of epidermoid tumors on steady-state free precession images.

Visibility of epidermoid tumors on steady-state free precession images. Research Abstract Details 

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Visibility of epidermoid tumors on steady-state free precession images. Abstract Text:

Y Sakamoto,M Takahashi,Y Ushio,Y Korogi,

PURPOSE: To determine whether steady-state free precession sequences improve the MR visibility of epidermoid tumors in comparison with spin-echo images. METHODS: Patients were four women and three men with epidermoid tumors in the subarachnoid spaces. MR was performed with a 1.5-T superconductive unit. For steady-state free precession imaging, three-dimensional Fourier transform fast imaging with steady-state free precession (FISP) images were used (20-40/7 [repetition time/echo time], flip angle of 25 degrees). The visualization and contrast-to-noise ratio were compared in FISP images and spin-echo images. In one case, the images of FISP and fast low-angle shot were obtained with variable repetition times and flip angles to evaluate the best pulse sequences for the visualization of epidermoid tumors. RESULTS: The contrast-to-noise ratios between tumors and cerebrospinal fluid ranged from 7.9 to 17.5 (average was 12.9) on FISP images. The average of contrast-to-noise ratios on T1, T2, and proton density-weighted spin-echo images were 1.6, 2.0, and 4.2, respectively. Three-dimensional Fourier transform FISP images best showed central nervous system and demonstrated epidermoid tumors excellently. CONCLUSIONS: Epidermoid tumors in the subarachnoid spaces were better demonstrated on steady-state free precession (three-dimensional Fourier transform FISP) than on conventional spin-echo images.

Visibility of epidermoid tumors on steady-state free precession images. Publishing Authors By Initials

Y Sakamoto,M Takahashi,Y Ushio,Y Korogi,

For similar nervous system: central nervous system: meninges: arachnoid: subarachnoid space research abstracts see: nervous system: central nervous system: meninges: arachnoid: subarachnoid space research

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Visibility of epidermoid tumors on steady-state free precession images. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: AJNR. American journal of neuroradiology

VOLUME: 15

Page Numbers: 1737-44

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ISSN: 0195-6108

DAY: 14

MONTH: Oct

YEAR: 1994

Visibility of epidermoid tumors on steady-state free precession images. Information

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LANGUAGE: eng

NlmUniqueID: 8003708

Visibility of epidermoid tumors on steady-state free precession images. Keywords Mesh Terms:

KEYWORDS: Subarachnoid Space

MESH TERMS: pathology

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Grant and Affiliation Information for Visibility of epidermoid tumors on steady-state free precession images.

AFFILIATION: Department of Radiology, Kumamoto University School of Medicine, Japan.

Country: UNITED STATES

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MEDLINETA: AJNR Am J Neuroradiol

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