中国医疗设备2025，Vol.40Issue(5)：141-146,164,7.DOI:10.3969/j.issn.1674-1633.20241086
小视野弥散加权成像在鼻咽癌中的应用研究
Application Study of Reduced Field of View Diffusion Weighted Imaging in the Diagnosis of Nasopharyngeal Carcinoma
摘要
Abstract
Objective To compare the application value of reduced field of view diffusion weighted imaging(rFOV DWI)and full field of view diffusion weighted imaging(fFOV DWI)in nasopharyngeal carcinoma.Methods The data of 104 patients with nasopharyngeal carcinoma were retrospectively analyzed.All patients underwent rFOV DWI and fFOV DWI examinations before treatment.Two radiologists subjectively scored the overall image quality,lesion edge clarity,visual distortion,magnetic susceptibility artifacts and lesion saliency of the DWI images using the double-blind method.The signal to noise ratio(SNR)and contrast to noise ratio(CNR)of the DWI images in the two groups were calculated and compared.The differences between two groups of apparent diffusion coefficient(ADC)in different pathological grades and clinical classifications were analyzed.Taking the transverse T2WI images as the reference,the objective indicators reflecting the alignment accuracy[maximum diameter(Dmax),minimum diameter(Dmin),Area,distortion rate(DR)]of the lesions in the DWI images were measured and compared.Results Each subjective scores and data measurements showed good consistency(ICC>0.7).In the subjective evaluation,except that there was no significant difference in the score of lesion edge clarity(P>0.05),the scores of rFOV DWI in the overall image quality,visual distortion,magnetic susceptibility artifacts and lesion saliency were all significantly higher than those of fFOV DWI(P<0.05).The SNR and CNR of the rFOV DWI images were both significantly higher than those of the fFOV DWI images(P<0.05).In the pathological grades and clinical staging(stages Ⅱ,Ⅲ,and Ⅳ),the ADC values measured on rFOV DWI were all significantly lower than those on fFOV DWI(P<0.05),and there was no significant difference in stage Ⅰ(P>0.05).The alignment accuracy of the lesion matching between the rFOV DWI and T2WI images was significantly better than that of fFOV DWI,and the differences in Dmax,Dmin,Area,and DR were all statistically significant(P<0.05).Conclusion In the DWI examination of nasopharyngeal carcinoma,rFOV DWI can improve the quality of images and clearly display lesions,which can provide more reliable imaging data for clinical diagnosis.关键词
磁共振成像/弥散加权成像/鼻咽癌/图像质量/表观扩散系数/小视野弥散加权成像Key words
magnetic resonance imaging/diffusion-weighted imaging(DWI)/nasopharyngeal carcinoma/image quality/apparent diffusion coefficient(ADC)/reduced field of view diffusion weighted imaging(rFOV DWI)分类
医药卫生引用本文复制引用
易思琪,王闽,何雅坤,任静,邓和平..小视野弥散加权成像在鼻咽癌中的应用研究[J].中国医疗设备,2025,40(5):141-146,164,7.基金项目
四川省科技计划项目基金(2021YFG0125). （2021YFG0125）
