期刊
RADIOGRAPHICS
卷 22, 期 4, 页码 895-905出版社
RADIOLOGICAL SOC NORTH AMERICA
DOI: 10.1148/radiographics.22.4.g02jl10895
关键词
aorta, flow dynamics; aorta, MR; aorta, stenosis or obstruction; heart, diseases; heart, flow dynamics; heart, MR; magnetic resonance (MR), cine study; magnetic resonance (MR), vascular studies; pulmonary arteries, flow dynamics; pulmonary arteries, MR
Velocity-encoded cine (VEC) magnetic resonance (MR) imaging is a valuable technique for quantitative assessment of flow dynamics in congenital heart disease (CHD). VEC MR imaging has a variety of clinical applications, including the measurement of collateral flow and pressure gradients in coarctation of the aorta, differentiation of blood flow in the left and right pulmonary arteries, quantification of shunts, and. evaluation of valvular regurgitation and stenosis. After surgical repair of CHD, VEC MR imaging can be used to monitor conduit blood flow, stenosis, and flow dynamics. There are some pitfalls that can occur in VEC MR imaging. These include potential underestimation of velocity and flow, aliasing, inadequate depiction of very small vessels, and possible errors in pressure gradient measurements. Nevertheless, VEC MR imaging is a valuable tool for preoperative planning and postoperative monitoring in patients with CHD.
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