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    • 6. 发明授权
    • Magnetic resonance imaging apparatus with temperature measurement
function
    • 具有温度测量功能的磁共振成像装置
    • US5916161A
    • 1999-06-29
    • US713430
    • 1996-09-13
    • Yasutoshi IshiharaKazuya Okamoto
    • Yasutoshi IshiharaKazuya Okamoto
    • G01R33/48A61B5/00A61B5/055
    • A61B5/015A61B5/055
    • A magnetic resonance imaging apparatus capable of measuring a temperature increase due to an application of RF magnetic fields for data acquisition purpose, and notifying an information on the measured temperature increase regularly to an operator, so as to secure the safety of a body to be examined. In this magnetic resonance imaging apparatus, the image data acquisition operation is controlled to acquire a phase information associated with a temperature change in an interior of the body to be examined, by displacing either an observation start timing or a radio frequency magnetic field application timing for a prescribed magnetic resonance signal in the magnetic resonance signal sequence from a normal timing for acquiring image data.
    • 一种磁共振成像装置,其能够测量由于应用RF磁场而导致的温度升高以用于数据采集目的,并且向操作者通知关于所测量的温度升高的信息,以确保要检查的身体的安全性 。 在该磁共振成像装置中,控制图像数据获取操作,通过将观察开始定时或射频磁场施加定时移位,来取得与被检体内部的温度变化相关的相位信息, 从用于获取图像数据的正常定时的磁共振信号序列中规定的磁共振信号。
    • 9. 发明授权
    • Magnetic resonance imaging apparatus having controller that sets carrier frequencies outside detected interference bands
    • 具有控制器的磁共振成像设备,其将载波频率设置在检测到的干扰频带
    • US08643362B2
    • 2014-02-04
    • US13048314
    • 2011-03-15
    • Takahiro SekiguchiKoji AkitaToshiyuki NakanishiKazuya OkamotoSojuro Kato
    • Takahiro SekiguchiKoji AkitaToshiyuki NakanishiKazuya OkamotoSojuro Kato
    • G01R33/44
    • G01R33/3692G01R33/3607
    • According to one embodiment, a apparatus includes a coil, a clock generator, an echo transmitter, a carrier generator, a clock transmitter, a regenerator, an receiver, a reconstructor, a detector, and a controller. The echo transmitter generates and transmits an echo transmission signal synchronously with a clock signal generated by the clock generator to wirelessly transmit an echo signal output from the col. The carrier generator generates a carrier signal have a frequency within a variable range. The clock transmitter wirelessly transmits a clock transmission signal. The regenerator regenerates the clock signal based on the transmitted clock transmission signal. The receiver extracts the echo signal synchronously with the regenerated clock signal from the transmitted echo transmission signal. The detector detects a frequency of an interference wave. The controller controls the carrier generator to generate the carrier signal having a frequency which comparatively small interference with respect to the detected frequency.
    • 根据一个实施例,一种装置包括线圈,时钟发生器,回波发射器,载波发生器,时钟发射器,再生器,接收器,重建器,检测器和控制器。 回波发射机与由时钟发生器产生的时钟信号同步地生成和发送回波发送信号,以无线地发送从该列输出的回波信号。 载波发生器产生具有可变范围内的频率的载波信号。 时钟发射机无线传输时钟传输信号。 再生器基于发送的时钟传输信号再生时钟信号。 接收机从发送的回波发送信号中与再生的时钟信号同步地提取回波信号。 检测器检测到干扰波的频率。 控制器控制载波发生器以产生具有相对于检测到的频率具有相对小的干扰的频率的载波信号。