Three-dimensional heart locator and compressed sensing for whole-heart MR angiography
Three-dimensional heart locator and compressed sensing for whole-heart MR angiography
复制标题
DOI：
10.1002/mrm.25800
复制
发表时间：
2016-05-01
影响因子：
3.3
通讯作者：
Powell, Andrew J.
中科院分区：
文献类型：
--
作者：
Moghari, Mehdi H.;Annese, David;Powell, Andrew J.
目的我们寻求开发一种具有三维 (3D) 呼吸运动补偿和减少扫描时间的全心磁共振血管造影技术。方法实施了一种新颖的呼吸运动补偿方法，该方法在血管造影数据之前采集 1D 导航器 (NAV) 和低分辨率心脏 3D 图像 (3D-LOC)。使用 NAV 门控完全获取中央 10% 的 SSFP k 空间，然后对 10% 的外围 k 空间进行随机欠采样以完成扫描。 3D-LOC 信息的空间配准用于校正三维体呼吸运动的中央和外围 k 空间线，然后使用压缩感知 (CS) 估计剩余的 k 空间数据。十名志愿者每人接受两次分辨率为 1 mm(3) 的血管造影采集：(i) 传统 NAV 结合 CS，以及 (ii) 新型 3D-LOC 结合 CS。结果与传统 NAV 相比，新型 3D-LOC 结合 CS 技术的扫描时间更短（4.81.1 与 6.3 +/- 1.7 分钟；P
PurposeWe sought to develop a whole-heart magnetic resonance angiography technique with three-dimensional (3D) respiratory motion compensation and reduced scan time.MethodsA novel respiratory motion compensation method was implemented that acquires a 1D navigator (NAV) and a low-resolution 3D-image of the heart (3D-LOC) just before the angiography data. The central 10% of SSFP k-space was fully acquired using NAV-gating, and then 10% of peripheral k-space was randomly undersampled to complete the scan. Spatial registration of the 3D-LOC information was used to correct the central and peripheral k-space lines for the bulk respiratory motion in three dimensions, and then the remaining k-space data was estimated using compressed sensing (CS). Ten volunteers each underwent two angiography acquisitions with 1 mm(3) resolution: (i) conventional NAV with CS, and (ii) the new 3D-LOC with CS.ResultsCompared with conventional NAV, the new 3D-LOC with CS technique had a shorter scan time (4.81.1 versus 6.3 +/- 1.7 min; P