[The study of magnetic resonance sialography in diagnosing parotid diseases].
OBJECTIVE
To study the feasibility of diagnosing parotid disease with magnetic resonance sialography (MRS) and to select the optimal scanning sequence.


METHODS
Twenty-three patients with parotid gland disease and 5 normal adults received sialography using magnetic resonance imaging technique and several sequences (including IR-FSE, FSE, SS-IR-FSE, SS-FSE) were used. After first scanning, the patients were scanned respectively 3 and 10 minutes after buccal application of vitamin C. And MR images of duct obtained. The images of parotid duct system were analysed and evaluated according to their displaying effects. Qualitative diagnosis was made based on MRI and those diagnosis were compared with pathological diagnosis after operation.


RESULTS
Images of MR sialography clearly displayed the main duct and its branches of parotid gland and the pathological changes of duct, such as narrow, expanded, stoppage. Of the scanning sequences, IR-FSE was superior to others in manifesting the parotid gland duct (P < 0.05). The performance of images after being given vitamin C did not significantly improve the displaying effect. The accurate rate of qualitative diagnosis was 95.6%.


CONCLUSIONS
MR sialography can clearly display the parotid ducts and their pathological changes. The accurate rate of qualitative diagnosis of parotid disease was higher than that X-ray sialography.
Tao
Xue-Jin
XJ
Stomatological Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China. taoxuejin@yahoo.com.cn
Feng
Ding-Yi
DY
Tang
Guo-Xiong
GX
Chen
Wei-Min
WM
Zhu
Sheng-Rong
SR
D000293:Adolescent; D000328:Adult; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010305:Parotid Diseases / Q000175:diagnosis*; D018987:Salivary Ducts / Q000473:pathology; D012796:Sialography / Q000379:methods*; D055815:Young Adult