Delays alternating with nutation for tailored excitation (DANTE) is often used as the preparation sequence in black blood imaging. After applying trains of small angle DANTE excitation pulse along with a gradient, the protons in blood flow and static tissues reach different steady states and thus have differente signal intensity. The static tissues shows dark strips, whose width is related to the product of the gradient amplitude and the duration of the DANTE sequence block. The larger the product is, the narrower the stripes are. A better suppression of flowing spins also require larger gradient amplitude×DANTE sequence block duration product and longer preparation time of the entire DANTE sequence module. As such, a high-performance gradient system is often required for this method. However, gradient amplifier (GPA) has limitations in reality. To solve this problem, we proposed here an optimized gradient for DANTE sequence in both the readout direction and slice rotation. The results demonstrated that a better black blood effect could be obtained by using the optimized method.
SUN Wei-hang
,
SUN Yu
,
WANG Feng
,
WANG Chao-hong
,
YANG Tao
. Optimization of Delays Alternating with Nutation for Tailored Excitation (DANTE) Sequence in Engineering[J]. Chinese Journal of Magnetic Resonance, 2018
, 35(2)
: 150
-161
.
DOI: 10.11938/cjmr20172604
[1] ZHNG X Y, WANG C L, XIE H B, et al. Parallel segmentation and tracking algorithm for magnetic resonance angiography images based on GPU[J]. Chinese J Magn Reson, 2016, 33(4):570-580. 张雪莹, 王成龙, 谢海滨, 等. 基于GPU加速的磁共振血管造影图像的并行分割与追踪算法[J]. 波谱学杂志, 2016, 33(4):570-580.
[2] KOKTZOGLOU I, LI D. Diffusion-prepared segmented steady-state free precession:application to 3D black-blood cardiovascular magnetic resonance of the thoracic aorta and carotid artery walls[J]. J Cardiovasc Magn Reson, 2007, 9(1):33-42.
[3] WANG J N, YARNYKH V L, HATSUKAMI T, et al. Improved suppression of plaque-mimicking artifacts in black-blood carotid atherosclerosis imaging using a multislice motion-sensitized driven-equilibrium (MSDE) turbo spin-echo (TSE) sequence[J]. Magn Reson Med, 2007, 58(5):973-981.
[4] LI L Q, MILLER K L, JEZZARD P. DANTE-prepared pulse trains:a novel approach to motion-sensitized and motion-suppressed quantitative magnetic resonance imaging[J]. Magn Reson Med, 2012, 68(5):1423-1438.
[5] LI L, ZHOU Y C, YUAN C, et al. Imaging lenticulostriate arteries at 3 tesla using optimized flow-sensitive black-blood technique[J]. Chinese J Magn Reson, 2016, 33(4):528-538. 李律, 周赜辰, 苑纯, 等. 基于优化后流动敏感黑血序列的豆纹动脉3 T磁共振成像[J]. 波谱学杂志, 2016, 33(4):528-538.
[6] LI L Q, MILLER K L, JEZZARD P. DANTE-prepared pulse trains:a novel approach to motion-sensitized and motion-suppressed quantitative magnetic resonance imaging[J]. Magn Reson Med, 2012, 68(5):1423-1438.
[7] WANG J N, HELLE M, ZHOU Z C, et al. Joint blood and cerebrospinal fluid suppression for intracranial vessel wall MRI[J]. Magn Reson Med, 2016, 75(2):831-838.
[8] LI L Q, KONG Y Z, ZAITSU Y, et al. Structural imaging of the cervical spinal cord with suppressed CSF signal using DANTE pulse trains[J]. Magn Reson Med, 2015, 74(4):971-977.
[9] ZUR Y, WOOD M L, NEURINGER L J. Spoiling of transverse magnetization in steady-state sequences[J]. Magn Reson Med, 1991, 21(2):251-263
[10] CARR H Y. Steady-state free precession in nuclear magnetic resonance[J]. Phys Rev, 1958, 112(5):1693-1701.
[11] STOREY P, ATANASOVA I P, LIM R P, et al. Tailoring the flow sensitivity of fast spin-echo sequences for noncontrast peripheral MR angiography[J]. Magn Reson Med, 2010, 64(4):1098-1108.
[12] BUSSE R F. Flow sensitivity of CPMG sequences with variable flip refocusing and implications for CSF signal uniformity in 3D-FSE imaging[C]. Proceedings of the 14th Annual Meeting of ISMRM. 2006:2430.
