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Salivary Glands and Lesions: Evaluation of Apparent Diffusion Coefficients with Split-Echo Diffusion-weighted MR Imaging—Initial Results¹

¹ From the Departments of Oral and Maxillofacial Radiology (N.Y., N.O., E.H., M.I., T.K., T.S.) and Diagnostic Radiology and Oncology (I.Y.), Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan; and the Application Group, Product Division, Siemens-Asahi Medical Technologies, Tokyo, Japan (K.M.). Received December 13, 2000; revision requested January 29, 2001; revision received April 6; accepted May 21. Address correspondence to I.Y. (e-mail: yamada.crad@med.tmd.ac.jp).

The authors investigated the feasibility of performing diffusion-weighted (DW) magnetic resonance (MR) imaging with split acquisition of fast spin-echo signals (hereafter, split echo) for the assessment of salivary glands and salivary lesions. Eighteen patients without salivary disease and 10 patients with Sjögren syndrome, chronic parotitis, or focal salivary masses underwent split-echo and echo-planar DW MR imaging. DW MR images and apparent diffusion coefficient maps of the salivary gland had higher quality with split-echo rather than with echo-planar DW MR imaging.

Index terms: Magnetic resonance (MR), diffusion study, 264.121416, 264.12149 • Magnetic resonance (MR), echo planar, 264.121416 • Magnetic resonance (MR), technology, 264.12149 • Phantoms • Salivary glands, diseases, 264.241, 264.696 • Salivary glands, MR, 264.121416, 264.12149 • Salivary glands, neoplasms, 264.30 • Sjögren syndrome

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