Time-resolved contrast-enhanced magnetic resonance angiography of the hand with parallel imaging and view sharing: initial experience
Time-resolved contrast-enhanced magnetic resonance angiography of the hand with parallel imaging and view sharing: initial experience
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DOI：
10.1007/s00330-006-0275-5
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发表时间：
2007-01-01
影响因子：
5.9
通讯作者：
Herborn, Christoph U.
中科院分区：
文献类型：
--
作者：
Brauck, Katja;Maderwald, Stefan;Herborn, Christoph U.
我们试图比较一个三维，对比增强，磁共振血管造影（3D CE MRA）序列结合平行成像（广义自动校准部分平行采集（GRAPPA））与时间分辨回波共享血管造影技术（TREAT）在个体内比较标准的3D MRA序列。4名健康志愿者（27 - 32岁）和11名手部血管病变患者（11 - 82岁）使用两个多通道接收器线圈在1.5特斯拉（T）MR系统（Magnetom Avanto，Siemens，埃尔兰根，德国）上进行检查。自动进样后（流速2.5 cc/s）0.1 mmol/kg钆特酸盐（多它灵，加栢，鲁瓦西，法国），使用TREAT序列收集32个连续3D数据集（TR/TE：4.02/1.31 ms，FA：10，GRAPPA加速因子：R=2，TREAT因子：5，体素大小：1.0 x 0.7 x 1.3 mm（3））和T1加权3D梯度回波序列（TR/TE：5.3/1.57 ms，FA：30，GRAPPA加速因子：2，体素大小：0.71 x 0.71 x 0.71 mm（3，））。对MR数据集的图像质量和血管细节的可视化进行了评价和比较。在志愿者组中，所有的MR成像都是成功的，而技术问题阻止了两名患者的标准协议的采集。对于相应的片段，两个序列上可见片段的数量相等。标准方案的总体图像质量明显优于TREAT方案。TREAT MRA对血流速度快的病变提供了功能信息，如：G.检测血管瘤中的供血和引流血管。MRA是一种强大的技术，结合了手部血管的形态和功能信息，并处理血管病变的非常特殊的生理要求，如快速动静脉通过时间。
We sought to compare a three-dimensional, contrast-enhanced, magnetic resonance angiogram (3D CE MRA) sequence combining parallel-imaging ( generalised autocalibrating partially parallel acquisitions (GRAPPA)) with a time-resolved echo-shared angiographic technique ( TREAT) in an intraindividual comparison to a standard 3D MRA sequence. Four healthy volunteers ( 27 - 32 years), and 11 patients ( 11 82 years) with vascular pathologies of the hand were examined on a 1.5-Tesla ( T) MR system (Magnetom Avanto, Siemens, Erlangen, Germany) using two multichannel receiver coils. Following automatic injection ( flow rate 2.5 cc/s) of 0.1 mmol/kg gadoterate ( Dotarem, Guerbet, Roissy, France), 32 consecutive 3D data sets were collected with the TREAT sequence ( TR/TE: 4.02/1.31 ms, FA: 10, GRAPPA acceleration factor: R=2, TREAT factor: 5, voxel size: 1.0 x 0.7 x 1.3 mm(3)) and a T1-wwighted 3D gradient-echo sequence (TR/TE: 5.3/1.57 ms, FA: 30, GRAPPA acceleration factor: 2, voxel size: 0.71 x 0.71 x 0.71 mm(3,)). MR data sets were evaluated and compared for image quality and visualisation of vascular details. In the volunteer group, all MR imaging was successful while technical problems prevented acquisition of the standard protocol in two patients. For the corresponding segments, the number of visible segments was equal on both sequences. Overall image quality was significantly better on the standard protocol than on the TREAT protocol. TREAT MRA provided functional information in lesions with rapid blood flow, e. g. detection of feeding and draining vessels in an haemangioma. TREAT-MRA is a robust technique that combines morphological and functional information of the hand vasculature and deals with the very special physiological demands of vascular lesions, such as quick arteriovenous transit time.