论文部分内容阅读
目的评估增强减影在脊椎转移瘤MR I中的应用价值。方法50例脊椎转移瘤病人进行MR I增强扫描,对比剂采用Gd-DTPA(0.1 mmol/kg),然后用T1W I增强后的图像与增强前的图像进行减影。通过对比噪声比(CNR)、信噪比(SNR)以及肿瘤边界清晰程度的比较,对MR I减影与否进行评估。结果MR I对比增强减影图像比传统的T1W I增强图像显示更清晰、更直观。所有脊椎转移瘤图像MR I减影的CNR和SNR比常规T1W I增强图像的CNR和SNR高。MR I减影CNR为155.05±24.73(x±SD),常规T1W I增强图像的CNR为11.11±14.26(t=35.65,Ρ<0.001)。MR I减影SNR为192.82±32.89(x±SD),常规T1W I增强图像的SNR为46.03±28.22(t=23.95,Ρ<0.001))。MR I对比增强减影图像比传统的T1W I增强图像能更好地显示脊椎转移瘤的边界和侵犯情况(2χ=29.34,Ρ<0.005)。结论MR I增强减影为探查和评估脊椎转移瘤提供了一个新的诊断方法。
Objective To evaluate the value of enhanced subtraction in MR I of spinal metastases. Methods Fifty patients with spinal metastases underwent enhanced MR I scans. Contrast agents were treated with Gd-DTPA (0.1 mmol / kg), and then subtracted with enhanced T1WI images before enhancement. MR I subtraction was assessed by comparison of CNR, SNR, and the degree of tumor border clearness. Results MR I Contrast Enhancement Subtraction images are sharper and more intuitive than the conventional T1W I enhancement images. The CNR and SNR of MR I subtraction of all spinal metastases images are higher than those of conventional T1W I enhancement images. The CNR of MR I subtraction was 155.05 ± 24.73 (x ± SD). The CNR of the conventional T1W I enhanced image was 11.11 ± 14.26 (t = 35.65, P <0.001). The MR I subtraction SNR was 192.82 ± 32.89 (x ± SD). The SNR of the conventional T1W I enhancement image was 46.03 ± 28.22 (t = 23.95, P <0.001). Compared with conventional T1W I enhanced images, MR I contrast enhanced subtraction images can better display the boundaries and violations of spinal metastases (2χ = 29.34, P <0.005). Conclusions MR I enhancement subtraction provides a new diagnostic method for detecting and assessing spinal metastases.