摘要
脑梗死是全球范围内导致高致残率和致死率的主要疾病之一，早期准确诊断对改善患者预后具有重要意义。本研究旨在评估磁共振成像（MRI）在脑梗死诊断中的准确性，并探讨其相较于传统影像学技术的优势。研究选取了200例疑似脑梗死患者，分别采用MRI与计算机断层扫描（CT）进行检查，并以数字减影血管造影（DSA）作为金标准进行对比分析。结果显示，MRI的敏感性为95%，特异性为92%，显著高于CT的78%和81%。此外，MRI能够更清晰地显示早期缺血性病变及微小病灶，尤其在超急性期（发病6小时内）表现出更高的诊断价值。本研究创新性地引入了定量分析方法，结合多序列成像技术，进一步提高了诊断的精确度。结论表明，MRI是脑梗死诊断中一种高效、可靠的工具，尤其适用于早期病变检测，为临床决策提供了重要依据。关键词：脑梗死；磁共振成像；诊断准确性；早期病变；数字减影血管造影
An Investigation into the Accuracy of MRI in Diagnosing Cerebral Infarction
Abstract
Cerebral infarction is one of the leading diseases worldwide in terms of high disability and mortality rates, and early accurate diagnosis plays a crucial role in improving patient outcomes. This study aimed to evaluate the accuracy of magnetic resonance imaging (MRI) in diagnosing cerebral infarction and to explore its advantages over traditional imaging techniques. A total of 200 patients suspected of having cerebral infarction were included and examined using both MRI and computed tomography (CT), with digital subtraction angiography (DSA) serving as the gold standard for comparative analysis. The results demonstrated that MRI had a sensitivity of 95% and specificity of 92%, significantly higher than the 78% and 81% achieved by CT. Moreover, MRI provided clearer visualization of early ischemic lesions and small foci, particularly exhibiting greater diagnostic value in the ultra-acute phase (within 6 hours of onset). Innovatively, this study introduced quantitative analysis methods combined with multi-sequence imaging techniques, further enhancing diagnostic precision. The conclusion indicates that MRI is an efficient and reliable tool for diagnosing cerebral infarction, especially suitable for detecting early-stage lesions, thus providing critical evidence for clinical decision-making.
Keywords: Brain Infarction; Magnetic Resonance Imaging; Diagnostic Accuracy; Early Lesions; Digital Subtraction Angiography
目录
摘要 I
Abstract II
引言 1
1 MRI技术在脑梗死诊断中的应用概述 1
1.1 MRI技术的基本原理 1
1.2 脑梗死的病理特征分析 2
2 MRI对脑梗死早期诊断的准确性评估 2
2.1 早期脑梗死的影像学表现 2
2.2 不同MRI序列选择的影响 3
2.3 早期诊断准确性的临床验证 3
3 MRI在脑梗死不同阶段诊断中的表现差异 3
3.1 急性期诊断表现差异 3
3.2 亚急性期与慢性期的对比分析 4
3.3 时间因素对诊断准确性的影响 4
4 提高MRI诊断脑梗死准确性的关键因素研究 5
4.1 扫描参数优化的作用 5
4.2 影像后处理技术的应用 5
4.3 人工智能辅助诊断的潜力 6
结论 6
参考文献 8
致谢 9
