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Abstract #1898

Diagnostic Accuracy of Fusion CT-like Images and MR Sialography for the Imaging Evaluation of Sialolithiasis

Yasuaki Tsurushima1, Takeshi Matsunobu2, Tomokazu Araki1, Tomoaki Moroda1, Ryuji Nojiri1, Masakuni Sakaguchi1, Masaaki Hori3, and Tomohiro Takamura4
1Radiology, Kenshinkai Tokyo Medical Clinic, Tokyo, Japan, 2Otorhinolaryngology-Head and Neck Surgery, Nippon Medical School Hospital, Tokyo, Japan, 3Radiology, Toho University Omori Medical Center, Tokyo, Japan, 4Radiology, Shizuoka General Hospital, Shizuoka, Japan

Synopsis

Keywords: Head & Neck/ENT, Head & Neck/ENT

Motivation: Imaging of sialolithiasis is critical for treatment planning, but standard CT involves radiation exposure, and MR sialography alone struggles to visualize calcified stones. A safer, more effective method is needed.

Goal(s): To evaluate the utility of fusion imaging combining MR sialography (MR-S) with CT-like images (CTLI) for diagnosis of sialolithiasis.

Approach: MRI scans of 60 patients were analyzed using MR-S, CTLI, and fusion imaging, and diagnostic accuracy was compared to conventional MRI.

Results: Fusion imaging significantly improved diagnostic sensitivity, specificity, and rater confidence compared to conventional methods.

Impact: The use of fusion imaging combining CT-like images and MR sialography eliminates the risks of radiation exposure and contrast injection, providing a highly noninvasive diagnostic tool for sialolithiasis. However, efforts should be made to reduce scan time.

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Keywords