定量磁化率成像(quantitative susceptibility mapping, QSM)能够敏感地反馈PD患者脑组织中铁沉积的情况,然而也有学者认为早期PD患者SN的QSM值无明显特异性,推测铁沉积并非早期PD的唯一指征,QSM无法完全表达早期PD除铁沉积外复杂的病理机制。合成磁共振成像(synthetic magnetic resonance imaging, SyMRI)是一种新型的定量MRI...
研究结果显示,在高分辨率和低分辨率的MRI-QSM图像中均可获得较高的对比噪声比率(contrast-to-noise ratio,CNR)。高分辨率QSM图像的CNR值比低分辨率QSM图像的CNR值显著增高,但在T2w图像中不同分辨率之间CNR值无显著差异。图像分析结果表明,与T2w相比,QSM获得...
【摘要】目的:利用MRI定量磁化率成像(QSM),分析帕金森病(PD)患者各基底核团磁敏感值的变化特点。方法:选取 2021 年 1月—2023年 12月在宁夏回族自治区人民医院确诊的PD患者 15例为PD组,选择同期性别及年龄匹配的健康志愿者 20例作为健康对照组。 所有患者均进行QSM,在QSM图像上测量所有受试者双侧尾状核头、苍...
提取SyMRI弛豫定量图和QSM图,测量各定量图SN的T1值、T2值、质子密度(proton density, PrD)值和QSM值。采用独立样本t检验或Mann-WhitneyU检验比较PD组与HC组SN的T1值、T2值、PrD值、QSM值的组间差异;绘制受试者工作特征(receiver operating characteristic, ROC)曲线分析各定量参数及联合诊断模型的诊断效能;采用DeLo...
MRI-based quantitativesusceptibility mapping (QSM) and R2 $ mapping of liver ironoverload: comparison with SQUID-based biomagnetic liversusceptometry[J]. Magnetic Resonance in Medicine,2017, 78(I) $64-270.Sharma SD, Fischer R, Schoennagel BP, et al. MRI‐based quan- titative susceptibility ...
Cite As Junmin (2025). junminliumri/test_B0NICE-QSM-R2star-SWI (https://github.com/junminliumri/test_B0NICE-QSM-R2star-SWI), GitHub. Retrieved March 6, 2025. MATLAB Release Compatibility Created with R2015b Compatible with any release Platform Compatibility Windows macOS Linux ...
Quantitative Susceptibility Mapping (QSM) is a novel MRI based technique that relies on estimates of the magnetic field distribution in the tissue under examination. Several sophisticated data processing steps are required to extract the magnetic field distribution from raw MRI phase measurements. The ob...
List of open-source quantitative susceptibility mapping (QSM) MRI software packages and data - mathieuboudreau/qsm-tools
Six-year clinical and MRI quantitative susceptibility mapping (QSM) follow-up in neurological Wilson’s disease under zinc therapy: a case reportHEPATOLENTICULAR degenerationINTELLECTUAL disabilitiesCOPPER metabolismBRAINDIAGNOSTIC imagingLONGITUDINAL methodMAGNETIC resonance imaging...
图1. 1例33岁男性健康者的MRI-T2w与QSM的图像信息对比。低分辨率QSM的敏感性降低,导致STN的后外侧象限(虚线箭头)的对比度显著下降;与T2w不同的是,QSM可清晰地显示磁敏感梯度信息。 作者最后指出,与传统的MRI-T2w序列成像相比,高分辨率MRI-QSM获得更好的图像对比度,可精确、清晰地定位STN,对提高DBS治疗帕金森病...