论文部分内容阅读
目的：确定自旋回波（ＳＥ）和电影动态ＭＲＩ（ｃｉｎｅＭＲＩ）评价亚急性和慢性心肌梗塞信号变化、室壁节段运动和其他合并症的价值。材料和方法：对心肌梗塞亚急性期５例和慢性期１３例进行ＭＲ横断面、左室长／短轴Ｔ１ＷＩ，其中１３例还经Ｔ２ＷＩ，５例经Ｇｄ－ＤＴＰＡ增强。结果：前壁（包括前间壁）受累６例，下壁、侧壁和后壁受累各２例，前壁和下壁均受累６例。Ｔ１ＷＩ显示４例梗塞室壁信号略低，４例亚急性期注射Ｇｄ－ＤＴＰＡ后强化，慢性期１１例室壁厚度变薄；ｃｉｎｅＭＲＩ显示１５例室壁节段运动减低；发现合并二尖瓣返流６例、主动脉瓣返流４例、心包积液４例。结论：ＳＥ和ｃｉｎｅＭＲＩ能较好地显示心肌梗塞的部位、范围和室壁厚度，ｃｉｎｅＭＲＩ评价室壁节段运动和瓣膜返流更具优势
OBJECTIVE: To determine the value of spin echo (SE) and cine MRI (cine MRI) in assessing subacute and chronic myocardial infarction signal changes, segmental wall motion and other comorbidities. Materials and Methods: MR cross-sectional and left-ventricular long / short-axis T1WI were performed in 5 cases of subacute myocardial infarction and 13 cases of chronic myocardial infarction. Thirteen cases were also confirmed by T2WI and 5 cases were enhanced by Gd-DTPA. Results: Six cases were involved in the anterior wall (including the anterior wall), two in the inferior wall, the lateral wall and the posterior wall, and six in the anterior wall and inferior wall. T1WI showed that the signal of infarct wall in 4 cases was slightly lower, the subacute injection of Gd-DTPA was enhanced in 4 cases, and the thickness of ventricular wall was thin in 11 cases in chronic phase. The cine MRI showed a decrease of wall motion in 15 cases. The mitral regurgitation Flow in 6 cases, aortic valve regurgitation in 4 cases, 4 cases of pericardial effusion. Conclusion: SE and cineMRI can better show the location, extent and wall thickness of myocardial infarction. The cine MRI is more effective in evaluating the segmental wall motion and valvular regurgitation