目的 对比分析基于深度学习重建(deep learning reconstruction,DL Recon)技术的头部T1WI增强序列与常规T1WI增强序列对垂体神经内分泌肿瘤病变的成像质量.材料与方法 前瞻性纳入行头部MRI增强扫描的50例垂体神经内分泌肿瘤患者,均在注射对比剂后行定制的T1WI(试验组)及常规T1WI(对照组)轴位扫描,其中试验组出两组图像,经DL Recon处理的图像记作A组,未经DL处理的原始图像记作B组,对照组记作C组,对比分析各组图像在灰质、白质和病灶区域的信噪比(signal to noise ratio,SNR)及对比噪声比(contrast to noise ratio,CNR),并由两位诊断医师分析图像总体质量和诊断置信度.结果 试验组T1WI扫描时间(42 s)比传统T1WI扫描时间短(76 s).A组的SNR灰质、SNR白质和SNR病灶显著高于B组和C组(P<0.001);A组的CNR灰质/白质以及CNR病灶/白质均高于B组和C组(P<0.001);A组的图像总体质量评分(5 vs.3和4)显著高于B组和C组(P<0.001),但是诊断置信度无显著差异(P>0.05).结论 垂体神经内分泌肿瘤成像时,基于DL重建技术的头部T1WI增强序列相比于常规T1WI增强序列在缩短了扫描时间的情况下具有更好的图像质量和同等的诊断置信度.
Application of head enhanced T1WI sequences based on deep learning reconstruction technology in the transformation of pituitary neuroendocrine neoplasms
Objective:To compare and analyze the imaging quality of head T1WI enhanced sequences based on deep learning reconstruction(DL Recon)and conventional T1WI enhanced sequences in pituitary neuroendocrine tumor lesions.Materials and Methods:Fifty patients with pituitary neuroendocrine tumor undergoing enhanced head MRI scan were prospectively collected,and customized T1WI(experimental group)and conventional T1WI(control group)axial scanning were performed after injection of contrast agent.In the experimental group,two sets of images were assigned,the DL-treated images were assigned as group A,the original images without DL treatment were assigned as group B,and the control group was assigned as group C.The signal to noise ratio(SNR)and contrast to noise ratio(CNR)of images in gray matter,white matter and focal area of each group were compared and analyzed,and the overall quality and diagnostic confidence of images were analyzed by two diagnostic physicians.Results:The T1WI scanning time(42 s)of the experimental group was shorter than that of the traditional T1WI scanning time(76 s).The SNR gray matter,SNR white matter and SNR lesions in group A were significantly higher than those in groups B and C(P<0.001);CNR gray matter/white matter and CNR lesion/white matter in group A were higher than those in groups B and C(P<0.001);the overall image quality scores of group A(5 vs.3 and 4)were significantly higher than those of groups B and C(P<0.001),but there was no significant difference in diagnostic confidence(P<0.05).Conclusions:In the imaging of pituitary neuroendocrine tumor,the head T1WI enhanced sequence based on DL reconstruction technology has better image quality and the same diagnostic confidence compared with the conventional T1WI enhanced sequence with shorter scanning time.
国家科技期刊平台
NSTL
万方数据
维普
