Super-resolution intracranial quiescent interval slice-selective magnetic resonance angiography
Super-resolution intracranial quiescent interval slice-selective magnetic resonance angiography
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DOI：
10.1002/mrm.26715
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发表时间：
2018-02-01
影响因子：
3.3
通讯作者：
Edelman, Robert R.
中科院分区：
文献类型：
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作者：
Koktzoglou, Ioannis;Edelman, Robert R.
目的评估非增强静态间隔切片选择性 (QISS) 磁共振血管造影 (MRA) 与超分辨率重建相结合对颅内动脉的描绘。方法使用 QISS MRA 通过流量补偿快速低角度拍摄 (FLASH) 读出和薄重叠切片对 7 名志愿者的颅内动脉进行 3T 成像。使用四个指标量化超分辨率重建和各种采集参数对颅内动脉描绘的影响：动脉与背景对比度噪声比（CNR）、动脉与背景对比度、动脉锐度和动脉半高全宽（FWHM）。还获得了三维飞行时间 (TOF) MRA。结果对于相似的体素大小，QISS MRA 显示颅内动脉，其动脉与背景对比度超过 3D TOF MRA 59-84%，具体取决于 k 空间采样轨迹 (P
PurposeTo evaluate the combination of nonenhanced quiescent-interval slice-selective (QISS) magnetic resonance angiography (MRA) with super-resolution reconstruction for portraying the intracranial arteries.MethodsThe intracranial arteries of seven volunteers were imaged at 3T using QISS MRA acquired with a flow-compensated fast low-angle shot (FLASH) readout and thin overlapping slices. The impacts of super-resolution reconstruction and various acquisition parameters on the delineation of intracranial arteries were quantified using four metrics: arterial-to-background contrast-to-noise ratio (CNR), arterial-to-background contrast, arterial sharpness, and arterial full-width-at-half-maximum (FWHM). Three-dimensional time-of-flight (TOF) MRA was also acquired.ResultsFor similar voxel sizes, QISS MRA displayed the intracranial arteries with an arterial-to-background contrast that exceeded 3D TOF MRA by 59-84%, depending on the k-space sampling trajectory (P