皇家飞利浦这个序列叫“enhanced-T1 High Resolution Isotropic Volume Examination”，简称 e-THRIVE，中文翻译“T1高分辨各向同性容积激发”。 我们可以看到，这个序列的基本原理是“三维容积内插快速扰相T1梯度回波序列”。 三家公司在命名的时候，都考虑到了序列的原理及特点。 三家公司都强调了是容积激发（也就是三维3D扫描）。 不同的是，GE强调的是肝脏，加速；西门子强调的是屏息，内插；飞利浦强调的是它的权重T1以及高分辨。 当然，除了这个规则，我前面 …

目前最常用的T1WI序列，组织对比良好，SNR较高，伪影少，扫描时间为2-5分钟. T2WI和PDWI加权像因扫描时间太长几乎完全被 快速SE序列 取代。 临床应用：常用于颅脑、脊柱及关节软组织。 2：快速SE序列. 西门子：TSE (turbo spin echo) GE：FSE (fast spin echo) 飞利浦：TSE (turbo spin echo) 特点. 快速成像，FSE序列一次90°射频脉冲激发后采集多个自旋回波，且对磁场不均匀性不敏感. 组织对比度降低，图像模糊，脂肪组织信号强度提高，组织的T2值有 …

A T1 fat-saturated post contrast sequence is a specific magnetic resonance imaging (MRI) sequence utilized to improve the visibility of certain anatomical structures and pathological changes within the body. This sequence incorporates three essential components:

Fast spin echo (FSE) imaging, also known as Turbo spin echo (TSE) imaging, are commercial implementations of the RARE (Rapid Acquisition with Relaxation Enhancement) technique originally described by Hennig et al in 1986. Since that time FSE/TSE has grown to become one of the "workhorse" pulse sequences used in virtually all aspects of modern ...

2022年5月6日 · T1W FSE ＋fat sat：T1抑脂扫描主要用于鉴别脂肪与其他非脂肪高信号病变。 3D SPGR：可重建，用于颅内小病变的扫描，如面部神经解剖显示，或者是肿瘤的术前定位扫描。

2020年7月30日 · 利用顺磁性造影剂gd-dtpa能够缩短t1的特性，将造影剂“团注”入上肢静脉，把握药物到达目的血管段的时间，选取合适的层块和fov，采用快速梯度回波序列扫描，能够在t1像上得到高信号的血管影像及其附近解剖结构。

FSE differences include: 1) decreased sensitivity to susceptibility; 2) increased magnetization transfer effects; and 3) edge and contrast effects. An illustrative example of this phenomenon is seen on routine T2-weighted brain images (right).

2021年1月7日 · t1-ffe. flash. 去除横向磁化矢量的扰相梯度回波序列主要获得t1对比（常采用大的翻转角（70°、80°），但一些特殊序列也采用较小的翻转角（20°、30°））图像。扰相梯度回波是目前应用最多的一类梯度回波序列。

The easiest way to identify T1-weighted post-gadolinium images is by observing blood vessels in the body, such as arteries and veins in the brain, neck, chest, abdomen, upper limbs, and lower limbs. Blood vessels and pathologies with high vascularity appear bright on T1-weighted post-gadolinium images.

A variety of T1-weighted pulse sequences are available for postcontrast imaging. These include conventional spin echo (SE), fast (turbo) spin echo (FSE), T1-weighted fluid attenuated inversion recovery (T1-FLAIR), spoiled gradient echo (SPGR), and magnetization prepared gradient echo (MP-RAGE) methods.