Microvascular obstruction may influence the development of edema, and therefore T2 signal. Hypothesis We hypothesize that the signal increase in T2-weighted CMR images in acute reperfused myocardial infarction is dependent on microvascular blood flow, and is not present in areas of microvascular ...
T2是两个用于测定电磁波的物理量，它们可以作为成像的数据。根据T1来成像的，就叫“T1加权成像”（T1-w...
Utility of T2 weighted short-tau inversion recovery (STIR) sequences in cardiac MRI: Clinical applications in acute ischemic (AI) and non-ischemic(NI) hear... M Francone,F Calabrese,I Iacucci,... - Ecr 被引量: 0发表: 2015年 MRI-detected subchondral bone marrow signal alterations of the...
Fistula volume and average T2 signal intensity showed moderate correlation to MAGNIFI-CD (r=0.72, p<0.001; r=0.49, p<0.001 respectively). LOPOCV AUC for normalised average T2 and fistula volume were 0.77 and 0.74, respectively, with sensitivities of 87% and 95%, and specificities of 62% ...
(signal-to-noise ratio,SNR)的能力;此外,由于运动、流动或血液抑制不完全, MESE序列可能会产生伪影。 基于单次激发SSFP的T2mapping 技术,可在不同的回波时间内多次采集图像,获得简单的T2曲线,并对T2直接进行定量。其主要缺点是为确保T2的准确度,需要 较长的脉冲TR(通常为T1的几倍),故扫描时间长。此外,由于通...
T2-STIR was proved to accurately detect acute myocardial infarction and identify the salvage area33. In HCM, the HighT2 area is mostly localized with LGE in the mid-wall of the myocardium. The mechanism for regional T2-signal enhancement in HCM is still unknown. However, several theories ...
Signal characteristics of focal bone marrow lesions in patients with multiple myeloma using whole body T1w-TSE, T2w-STIR and diffusion-weighted imaging wit... Signal characteristics of focal bone marrow lesions in patients with multiple myeloma using whole body T1w-TSE,T2w-STIR and diffusion-...
该序列的局限性在于一系列180°脉冲的偏差和层面编码梯度误差会导致复杂的激发回波模式,从而使测得的T2值发生偏移,同时还会对人体释放大量热量,故在更高的磁场强度下该序列应用受限;多回波技术下回波时间(TE)的数量和选择受到限制,从而限制优化信噪比(signal‑to‑noise ratio,SNR)的能力;此外,由于运动、流动或...
目的:比较T2Ideal与T2Fse及Stir序列在鼻咽部脂肪抑制效果.资料与方法:30例正常志愿者鼻咽部同时进行T2Ideal、T2Fse、Stir三种脂肪抑制序列扫描,对图像脂肪抑制质量进行主观评价分级及测量信噪比进行对比.结果:T2Ideal序列脂肪抑制质量为(3级30例),T2Fse序列脂肪抑制质量为(2级6例,1级24例),Stir序列脂肪抑制质量为(3...
我是不是可以理解那块黑是增生的骨皮质？再补充张T1和STIR对比,那块T2上嵌入白色的黑色在STIR上中间...