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《Radiologic Practice》 2018-04
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Diagnostic value of multiplanar reformation of MSCT in piriformis syndrome

YI Jing;HE Xu-cheng;ZHOU Guang-jin;Department of CT,the People's Hospital of Dingzhou City;  
Objective:To investigate the value of MSCT multiplanar reformation in the diagnosis of piriformis syndrome.Methods:Pelvic MSCT scanning was performed in 30 cases with clinically diagnosed unilateral piriformis syndrome.Multiplanar reformation in oblique coronal projection was performed for demostating the relationship between the sciatic nerve and piriformis muscles.The thickness of piriformis muscle and sagital diameter of intrapiriformis foramen were measured,and a comparative study was made for analysis the data between the diseased side and contralateral normal side.Results:Mutation type of the relationship between sciatic nerve and piriformis muscle was observed more in the diseased side than in contralateral side(23% vs 3%).Thickness of the ipsilateral piriform muscle[(17.62±3.39)mm]was greater than that of the contralateral side[(14.28±3.32)mm],the difference was statistically significant(P0.01).Diameter of infrapiriform foramen in the diseased side was smaller than that in the contralateral side [(4.26±2.16)vs(7.69±1.75)mm],the difference was statistically significant(P0.01).Conclusion:MSCT multiplanar reformation can better show the relationship between the sciatic nerve and piriformis muscle,and is beneficial to measurement of piriformis muscle thickness and infrapiriform foramen diameter,so that it provides imaging evidence for piriform syndrome diagnosis.
【CateGory Index】: R685;R816.8
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