注释:SSFSE=single-shot fast spin-echo,单次激发快速自旋回波序列;FSE=fast spin-echo,快速自旋回波序列;FRFSE=fast-recovery fast spin echo,快速恢复快速自旋回波序列;DWI= diffusion weighted imaging,弥散加权成像;T2WI=T2 weighted imaging,T2加...
02. 灌注成像用于疾病的鉴别诊断 例2.MELAS 与急性脑梗死影像学比较(图 4),两者在 T2WI、DWI 和 ADC 上表现很类似;但 MELAS 表现为明显高灌注(皮层为主);急性脑梗死表现为明显低灌注,灌注成像对于鉴别两者具有重要意义[4]。 图4. MELAS(上排)(发病后 2...
Yu-Feng Z, Yong H,Chao-Zhe Z, et al. Altered baseline brain activity in children with ADHDrevealed by resting-state functional MRI[J]. Brain and Development, 2007,29(2): 83-91. Zou Q H, Zhu C Z, Yang Y,et al. An improved approach to detection of amplitude of low-frequencyfluctua...
包括遗传性脑出血伴淀粉样变(hereditary cerebral hemorrhage with amyloidosis, HCHWA)、FOXC1所致的脑小血管病、视网膜血管病变伴脑白质营养不良(retinal vasculopathy with cerebral leukodystrophy, RVCL)等。Dutch型HCHWA是常染色体显性遗传性疾病,MRI表现为CMBs(常见于脑叶)、脑叶ICH、CSS、腔隙性脑梗死、WMH和半卵...
Fig. 19. Four-shot DWI images with 1.2 mm, 2 mm, and 4 mm slice thickness. Other imaging parameters are: in-plane resolution 1.2 × 1.2 mm2 for the 1st row, 0.8 × 0.8 mm2 for the 2nd and 3rd rows, 32 channels, b value 1000 s/ mm2 , and single average. All data are acquired...
扩散加权成像(diffusion weighted imaging, DWI)是检测人体水分子微观运动的非侵入性检查方法,单指数模型DWI可用表观扩散系数(apparent diffusion coefficient, ADC)定量评价水分子扩散运动中受限的方向和程... 出版日期: 2023年08月 3.IDEAL序列定量评估早期强直性脊柱炎椎旁肌脂肪浸润 ...
MRI-DWI联合超声声衰减成像诊断脂肪肝背景下< 2 cm局灶结节性病变的价值[J]. 实用医学杂志, 2024, 40(15): 2148-2153. Yue LÜ,Hujing LU,Juanjuan. ZHANG. Value of MRI-DWI combined with attenuation imaging in diagnosis of focal nodular lesions < 2 cm in fatty liver[J]. The Journal of ...
MS-EPI:multi shot echo planar imaging多激发平面回波成像 DWI:diffusion weighted imaging扩散加权成像(小视野弥散Philips-ZOOM/Siemens-ZOOMit/GE-FOCUS) ADC:apparent diffusion coefficient表观扩散系数 DWIBS:diffusion weighted imaging with background suppression背景抑制扩散加权成像 ...
摘要: 良恶性椎体压缩骨折(vertebral compression fractures,VCFs)的临床治疗原则和预后差别极大,准确鉴别二者意义重大。近年来随着MRI技术如扩散加权成像(diffusion weighted imaging,DWI)、动态对比增强MRI (d…
西门子:稳态进动快速成像 FISP (Fast imaging with steady state precession)GE:GRE飞利浦:Conventional FFE特点▪信号强度与T2/T1相关,所以像尿液,脑脊液在FISP像是更亮▪长TR 2D T2加权和3D都可用于大关节(如膝关节半月板、软骨)检查。10.1:平衡式SSFP (Balance-SSFP)西门子:真实稳态进动快速成像True-FISP (...