CT与MRI用于极外侧型腰椎间盘突出症诊断的比较分析

目的比较CT与MRI用于极外侧型腰椎间盘突出症（FLLDH）的影像学诊断价值并分析其影像学特点。方法选择FLLDH患者38例，观察经CT和MRI扫描的椎间盘突出阳性节段结果及其影像学特点，对其影像学诊断价值和影像学特点进行分析。结果CT扫描阳性结果为94．74％（36／38），NIRI扫描为100．00％（38／38），差异无统计学意义（χ2=2．89，P〉0．05）；椎间盘突出节段主要集中在L3-4和L4-5节段，MRI扫描分别占34．21％（13／38）和39．47％（15／38），CT扫描分别占31．58％（12／38）和39．47％（15／38）；突出呈丘状22例，半圆形8例，不规则形和三角型各3例；椎间孔内侧型4例，椎间孔外侧型18例，混合型14例；突出程度〈3mm者13例，4～7mm者20例，7mm以上者5例。结论CT与MRI检查均能够准确诊断FLLDH，对判断FLLDH及其位置、程度和指导临床及时处理具有重要的临床应用价值。

The diagnosis comparative analysis for patients with FLLDH by CT and MRI

Objective To investigate and analyze the diagnostic imaging features of patients with far lateral lumbar disc herniation （FLLDH） by CT and MRI. Methods 38 patients with FLLDH were diagnosed, and its radiol- ogy imaging diagnosis and clinical characteristics were analyzed. The main positive results of intervertebral disc herni- ation segment by CT and MRI scanning and its imaging features were observed. Results The positive of CT scans was 94.74% （36/38）,MRI scans was 100% （38/38）, the difference was not statistically significant （χ2 = 2.89, P 〉 0.05 ） ;disc segments were mainly in L3-4 and L4-5 segments respectively, MRI scans were 34.21% （ 13/38 ） and 39.47% （ 15/38）, CT scans were 31.58% （ 12/38 ） and 39.47% （ 15/38 ） ; 22 cases with hummocky, 8 cases with semicircular,irregular triangular shape and 3 cases respectively ;4 cases with foramen medial, 18 cases with lateral fo- ramen,14 cases of mixed type;prominence of 〈3 mm was 13 cases,20 cases with 4 to 7 mm,8 cases with more than 7mm. Conclusion CT and MRI examination can accurately diagnose FLLDH and judge its location, extent and clini- cal timely treatment has important clinical application value.