Objective To investigate the difference in interictal perfusion patterns between refractory and non-refractory temporal lobe epilepsies evaluated with flow-sensitive alternating inversion recovery (FAIR) magnetic reso...Objective To investigate the difference in interictal perfusion patterns between refractory and non-refractory temporal lobe epilepsies evaluated with flow-sensitive alternating inversion recovery (FAIR) magnetic resonance (MR) sequence. Methods Nine patients with refractory temporal lobe epilepsy, 21 patients with non-refractory temporal lobe epilepsy, and 13 normal volunteers underwent FAIR MR scanning. The relative cerebral blood flow (rCBF) in bilateral hemispheres and mesial temporal lobes were measured. And we also calculated the asymmetry index (AI) values. Results The AI values of bilateral hemispheres in refractory and non-refractory epilepsy patients were both significantly different from those of volunteers (P=0.012 and 0.029, respectively). There was significant difference in AI values of bilateral mesial temporal lobes between non-refractory epilepsy patients and volunteers (P=0.049), while no significant difference between refractory epilepsy patients and volunteers. Conclusions The hypoperfusion pattern of interictal refractory temporal lobe epilepsy patients is different from that of non-refractory patients. Although the hypoperfusion tends to extend out of temporal lobes in all patients, the refractory epilepsy patients have a preference of bilateral mesial temporal hypoperfusion, which may be valuable for evaluating prognosis.展开更多
This paper concentrates on super-resolution imaging of the ship target under the sparse aperture situation.Firstly,a multi-static configuration is utilized to solve the coherent processing interval(CPI)problem caused ...This paper concentrates on super-resolution imaging of the ship target under the sparse aperture situation.Firstly,a multi-static configuration is utilized to solve the coherent processing interval(CPI)problem caused by the slow-speed motion of ship targets.Then,we realize signal restoration and image reconstruction with the alternating direction method of multipliers(ADMM).Furthermore,we adopt the interferometric technique to produce the three-dimensional(3D)images of ship targets,namely interferometric inverse synthetic aperture radar(InISAR)imaging.Experiments based on the simulated data are utilized to verify the validity of the proposed method.展开更多
文摘Objective To investigate the difference in interictal perfusion patterns between refractory and non-refractory temporal lobe epilepsies evaluated with flow-sensitive alternating inversion recovery (FAIR) magnetic resonance (MR) sequence. Methods Nine patients with refractory temporal lobe epilepsy, 21 patients with non-refractory temporal lobe epilepsy, and 13 normal volunteers underwent FAIR MR scanning. The relative cerebral blood flow (rCBF) in bilateral hemispheres and mesial temporal lobes were measured. And we also calculated the asymmetry index (AI) values. Results The AI values of bilateral hemispheres in refractory and non-refractory epilepsy patients were both significantly different from those of volunteers (P=0.012 and 0.029, respectively). There was significant difference in AI values of bilateral mesial temporal lobes between non-refractory epilepsy patients and volunteers (P=0.049), while no significant difference between refractory epilepsy patients and volunteers. Conclusions The hypoperfusion pattern of interictal refractory temporal lobe epilepsy patients is different from that of non-refractory patients. Although the hypoperfusion tends to extend out of temporal lobes in all patients, the refractory epilepsy patients have a preference of bilateral mesial temporal hypoperfusion, which may be valuable for evaluating prognosis.
基金This work was supported by the National Natural Science Foundation of China(61871146).
文摘This paper concentrates on super-resolution imaging of the ship target under the sparse aperture situation.Firstly,a multi-static configuration is utilized to solve the coherent processing interval(CPI)problem caused by the slow-speed motion of ship targets.Then,we realize signal restoration and image reconstruction with the alternating direction method of multipliers(ADMM).Furthermore,we adopt the interferometric technique to produce the three-dimensional(3D)images of ship targets,namely interferometric inverse synthetic aperture radar(InISAR)imaging.Experiments based on the simulated data are utilized to verify the validity of the proposed method.
