We report that (1) calcium signaling increases with the application of ultrasound; (2) the neuronal response rate to ultrasound is dependent on pulse repetition frequency (PRF); and (3) ultrasound can reversibly alter the inhibitory effects of tetrodotoxin (TTX) in pharmacological studies. This ...
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- 《Skeletal Radiology》 被引量: 42发表: 2010年 A neural approach to automatic pulse repetition interval modulation recognition The intervals between the pulse time of arrival (TOA) values of a radar pulse train nearly always follow a specific modulation type. We pursue a fully au... Gregory ...
Radiology residents now are introduced in their 1st year of training to the MR pulse sequences routinely used in clinical imaging, including various spin-echo, gradient-echo, inversion-recovery, echo-planar imaging, and MR angiographic sequences. However, to make optimal use of these techniques, ...
With this technique (variable-rate spin-echo pulse sequence), the repetition time and echo time (TR msec/TE msec) were reduced during imaging as a function of the phase-encoding view. To maintain T2-based contrast, TR and TE for the low-spatial-frequency views were left at their ...
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have suggested the use of multiple short bursts emitted at high pulse repetition frequency separated by off time in the range of microseconds to improve the safety of drug delivery39. The burst defined in this study was composed of 5-cycle short pulses (5 µs) repeated every 800 µs ...
第二步是基于脉冲重复间隔(pulse repetition interval,PRI)对第一步形成的簇进行分选[6-10]。基于PRI的分选方法,关键是利用PRI的周期性,在固定PRI的雷达信号中,这一类方法有着较为准确和稳定的表现。此类方法的一个经典思路是首先确定雷达信号PRI或者PRI的周期,然后基于找到的PRI或者PRI周期搜索脉冲[6-8],如图3所...
Division of RadiologyKouji KobayashiDivision of RadiologyYasuhiko NakamuraDivision of RadiologyRadiological Physics&TechnologyWada T, Togao O, Tokunaga C, Funatsu R, Kobayashi K, Nakamura Y. Effect of the saturation pulse duration on chemical exchange saturation transfer in amide proton transfer MR ...
For all qualitative scans, the American College of Radiology (ACR) large MRI phantom[5]was acquired. Quantitative scans used the T1and T2planes of the International Society for Magnetic Resonance Medicine / National Institute of Standards and Technology (ISMRM/NIST) phantom[6]for T1and T2mapping,...