亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Quantitative susceptibility-weighted imaging in presence of strong susceptibility sources: Application to hemorrhage

磁化率加权成像 定量磁化率图 相位成像 脑出血 医学 核医学 核磁共振 磁共振成像 放射科 物理 病理 外科 显微镜 蛛网膜下腔出血
作者
Ashmita De,Hongfu Sun,Derek Emery,Kenneth Butcher,Alan H. Wilman
出处
期刊:Magnetic Resonance Imaging [Elsevier BV]
卷期号:92: 224-231 被引量:2
标识
DOI:10.1016/j.mri.2022.06.010
摘要

To optimize quantitative susceptibility-weighted imaging also known as true susceptibility-weighted imaging (tSWI) for strong susceptibility sources like hemorrhage and compare to standard susceptibility-weighted imaging (SWI) and quantitative susceptibility mapping (QSM).Ten patients with known intracerebral hemorrhage (ICH) were scanned using a 3D SWI sequence. The magnitude and phase images were utilized to compute QSM, tSWI and SWI images. tSWI parameters including the upper threshold for creating susceptibility-weighted masks and the multiplication factor were optimized for hemorrhage depiction. Combined tSWI was also computed with independent optimized parameters for both veins and hemorrhagic regions. tSWI results were compared to SWI and QSM utilizing region-of-interest measurements, Pearson's correlation and Kruskal-Wallis test.Fifteen hemorrhages were found, with mean susceptibility 0.81 ± 0.37 ppm. Unlike SWI which utilizes a phase mask, tSWI uses a mask computed from QSM. In tSWI, the weighted mask required an extended upper threshold far beyond the standard level for more effective visualization of hemorrhage texture. The upper threshold was set to the mean maximum susceptibility in the hemorrhagic region (3.24 ppm) with a multiplication factor of 2. The blooming effect, seen in SWI, was observed to be larger in hemorrhages with higher susceptibility values (r = 0.78, p < 0.001) with reduced blooming on tSWI. On SWI, 4 out of 15 hemorrhages showed phase wrap artifacts in the hemorrhagic region and all patients showed some phase wraps in the air-tissue interface near the auditory and frontal sinuses. These phase wrap artifacts were absent on tSWI. In hemorrhagic regions, a higher correlation was observed between the actual susceptibility values and mean gray value for tSWI (r = -0.93, p < 0.001) than SWI (r = -0.87, p < 0.001).In hemorrhage, tSWI minimizes both blooming effects and phase wrap artifacts observed in SWI. However, unlike SWI, tSWI requires an altered upper threshold for best hemorrhage depiction that greatly differs from the standard value. tSWI can be used as a complementary technique for visualizing hemorrhage along with SWI.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
huangyongjie发布了新的文献求助10
3秒前
巴山夜雨完成签到,获得积分10
14秒前
huangyongjie关注了科研通微信公众号
33秒前
傲娇大船完成签到,获得积分10
1分钟前
Fischl完成签到,获得积分10
1分钟前
南风发布了新的文献求助10
1分钟前
晏晏发布了新的文献求助10
1分钟前
南风完成签到,获得积分10
1分钟前
Vincent完成签到 ,获得积分20
1分钟前
aura完成签到 ,获得积分10
2分钟前
隐形曼青应助fl采纳,获得10
2分钟前
3分钟前
fl发布了新的文献求助10
3分钟前
Delight完成签到 ,获得积分10
3分钟前
DD完成签到 ,获得积分10
3分钟前
无花果应助wpzzpw采纳,获得10
3分钟前
俭朴新之完成签到 ,获得积分10
4分钟前
4分钟前
wpzzpw发布了新的文献求助10
4分钟前
4分钟前
4分钟前
畅快谷秋完成签到 ,获得积分10
4分钟前
Apollo完成签到,获得积分10
4分钟前
可爱的函函应助Apollo采纳,获得10
4分钟前
4分钟前
Apollo发布了新的文献求助10
4分钟前
完美世界应助科研通管家采纳,获得20
5分钟前
万金油完成签到 ,获得积分10
5分钟前
msn00完成签到,获得积分10
5分钟前
Jasper应助傲娇的觅翠采纳,获得10
5分钟前
锐仔完成签到,获得积分10
5分钟前
洋子完成签到 ,获得积分10
5分钟前
LL完成签到 ,获得积分10
5分钟前
blenx完成签到,获得积分10
6分钟前
123123完成签到 ,获得积分10
6分钟前
6分钟前
123完成签到 ,获得积分10
6分钟前
乐乐应助嘚嘚采纳,获得10
7分钟前
7分钟前
高分求助中
【此为提示信息,请勿应助】请按要求发布求助,避免被关 20000
Continuum Thermodynamics and Material Modelling 2000
Encyclopedia of Geology (2nd Edition) 2000
105th Edition CRC Handbook of Chemistry and Physics 1600
ISCN 2024 – An International System for Human Cytogenomic Nomenclature (2024) 1500
Izeltabart tapatansine - AdisInsight 800
Maneuvering of a Damaged Navy Combatant 650
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 物理 生物化学 纳米技术 计算机科学 化学工程 内科学 复合材料 物理化学 电极 遗传学 量子力学 基因 冶金 催化作用
热门帖子
关注 科研通微信公众号,转发送积分 3773657
求助须知:如何正确求助?哪些是违规求助? 3319141
关于积分的说明 10193294
捐赠科研通 3033802
什么是DOI,文献DOI怎么找? 1664695
邀请新用户注册赠送积分活动 796270
科研通“疑难数据库(出版商)”最低求助积分说明 757416