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    • 1. 发明申请
    • MAGNETIC RESONANCE IMAGING APPARATUS AND PROGRAM, AND RF PULSE TRANSMISSION METHOD
    • 磁共振成像装置和程序,以及射频脉冲传输方法
    • US20090179641A1
    • 2009-07-16
    • US12350069
    • 2009-01-07
    • Tsuyoshi MatsudaHidenori Kawai
    • Tsuyoshi MatsudaHidenori Kawai
    • G01R33/48
    • G01R33/5659G01R33/4835
    • A magnetic resonance imaging apparatus generates slice images by repeating, for a plurality of consecutive repetition times, transmitting an RF pulse to a plurality of slices and scanning the slices to acquire magnetic resonance signals generated therein, in multi-slice acquisition covering the sequential slices, the sequential slices including at least a first slice, a second slice, a third slice, and a fourth slice. In the first, second, third, and fourth slices, phases of the RF pulses are alternately reversed every consecutive repetition time, and the RF pulses are transmitted to the first, second, third, and fourth slices such that the phases of the RF pulses transmitted to the first and third slices are reversed from each other in each consecutive repetition time and such that the phases of the RF pulses transmitted to the second and fourth slices are reversed from each other in each consecutive repetition time.
    • 磁共振成像装置通过在多个连续的重复次数中重复地向多个片段发送RF脉冲并扫描片段以获取其中生成的磁共振信号来生成切片图像,在覆盖顺序片段的多片段获取中, 所述顺序切片包括至少第一切片,第二切片,第三切片和第四切片。 在第一,第二,第三和第四切片中,每个连续重复时间交替地反转RF脉冲的相位,并且将RF脉冲发送到第一,第二,第三和第四切片,使得RF脉冲的相位 发送到第一和第三切片在每个连续重复时间中彼此相反,并且使得发送到第二和第四切片的RF脉冲的相位在每个连续的重复时间中彼此相反。
    • 3. 发明授权
    • Wood-cement board product
    • 木水泥板产品
    • US6001169A
    • 1999-12-14
    • US64296
    • 1998-04-22
    • Hidenori Kawai
    • Hidenori Kawai
    • C04B18/26C04B28/02C04B12/00
    • C04B18/26C04B28/02C04B2111/00318Y02W30/92Y02W30/97
    • A wood-cement board is manufactured by a method comprising mixing 30 to 40% by weight of cement material, 20 to 27% by weight of wood flake, and 30 to 40% by weight of fly ash to prepare a raw material mixture, strewing said raw material mixture on a mold panel to form a mat, pressing and pre-curing said mat with moisture, and main-curing said pre-cured mat in an autoclave. Preferably the particle size of said fly ash is selected so that less than 10% by weight of fly ash may remain on the sieve whose opening size is 150 .mu.m and said main-curing process is carried out at a temperature of the saturated aqueous vapor in a range between 140 to 165.degree. C. for 7 to 10 hours.
    • 通过以下方法制造木材水泥板:将30〜40重量%的水泥材料,20〜27重量%的木片和30〜40重量%的飞灰混合,制成原料混合物 所述原料混合物在模板上形成垫子,用水分压制和预固化所述垫,并将所述预固化垫主体固化在高压釜中。 优选地,选择所述飞灰的粒径,使得在开口尺寸为150μm的筛上可能残留少于10重量%的飞灰,并且所述主固化过程在饱和水蒸气的温度下进行 在140〜165℃的范围内进行7〜10小时。
    • 8. 发明申请
    • MR SCANNING METHOD AND MRI APPARATUS
    • 扫描方法和MRI装置
    • US20070075707A1
    • 2007-04-05
    • US11534140
    • 2006-09-21
    • Hidenori KawaiYoshikazu Ikezaki
    • Hidenori KawaiYoshikazu Ikezaki
    • G01V3/00
    • G01R33/5611
    • The present invention provides an MR scanning method and an MRI apparatus for decreasing the artifacts while improving the signal from within the blood vessels in the parallel imaging. In the sequence for calibration data acquisition the, RF pulse of the flip angle and the slice gradient are applied, then the phase encoding pulse is applied. Thereafter the MR signal will be received while applying the read pulse with the flow compensation pulse (marked as hatch area). Using a sequence with the flow compensation added in the calibration scanning allows decreasing the artifacts caused by the blood stream. This also increased the signal from within the blood vessels, allowing improving the S/N ratio of the calibration data.
    • 本发明提供一种用于在并行成像中改善来自血管内的信号的同时减少伪影的MR扫描方法和MRI装置。 在校准数据采集顺序中,应用翻转角的RF脉冲和切片梯度,然后施加相位编码脉冲。 此后,在使用流量补偿脉冲(标记为舱口区域)的读取脉冲的同时接收MR信号。 使用在校准扫描中添加的流量补偿的顺序允许减少由血流引起的伪像。 这也增加了血管内的信号,从而提高了校准数据的S / N比。
    • 9. 发明授权
    • Magnetic resonance imaging apparatus and program, and RF pulse transmission method
    • 磁共振成像装置和程序,以及RF脉冲传输方法
    • US07859263B2
    • 2010-12-28
    • US12350069
    • 2009-01-07
    • Tsuyoshi MatsudaHidenori Kawai
    • Tsuyoshi MatsudaHidenori Kawai
    • G01V3/00
    • G01R33/5659G01R33/4835
    • A magnetic resonance imaging apparatus generates slice images by repeating, for a plurality of consecutive repetition times, transmitting an RF pulse to a plurality of slices and scanning the slices to acquire magnetic resonance signals generated therein, in multi-slice acquisition covering the sequential slices, the sequential slices including at least a first slice, a second slice, a third slice, and a fourth slice. In the first, second, third, and fourth slices, phases of the RF pulses are alternately reversed every consecutive repetition time, and the RF pulses are transmitted to the first, second, third, and fourth slices such that the phases of the RF pulses transmitted to the first and third slices are reversed from each other in each consecutive repetition time and such that the phases of the RF pulses transmitted to the second and fourth slices are reversed from each other in each consecutive repetition time.
    • 磁共振成像装置通过在多个连续的重复次数中重复地向多个片段发送RF脉冲并扫描片段以获取其中生成的磁共振信号来生成切片图像,在覆盖顺序片段的多片段获取中, 所述顺序切片包括至少第一切片,第二切片,第三切片和第四切片。 在第一,第二,第三和第四切片中,每个连续重复时间交替地反转RF脉冲的相位,并且RF脉冲被发送到第一,第二,第三和第四切片,使得RF脉冲的相位 发送到第一和第三切片在每个连续重复时间中彼此相反,并且使得发送到第二和第四切片的RF脉冲的相位在每个连续的重复时间中彼此相反。