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Magnetic resonance imaging device
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A technology of magnetic resonance imaging and nuclear magnetic resonance, which can be used in magnetic resonance measurement, measurement device, measurement of magnetic variables, etc., and can solve problems such as dynamic range restriction
Active Publication Date: 2017-03-01
TOSHIBA MEDICAL SYST CORP
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[0011] If the MR signal is digitized and then wirelessly transmitted, the problem of the limitation of the dynamic range can be solved, but the following problems arise
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no. 1 Embodiment approach ＞
[0044] figure 1 It is a block diagram showing the overall configuration of the MRI apparatus 20A in the first embodiment. Such as figure 1 As shown, the MRI apparatus 20A has: a frame 21 , a viewing table 32 , and a top plate 34 . The top plate 34 is movably arranged on the examination table 32 so as to be supported by the examination table 32 . Furthermore, the MRI apparatus 20A includes, for example, a static fieldmagnet 22 , a shim coil 24 , a gradient magnetic field coil 26 , and a transmission RF coil 28 in a cylindrically formed gantry 21 . The frame 21 corresponds to the part indicated by a thick line frame in the figure.
[0045] The subject P is placed on the top plate 34 . The static fieldmagnet 22 and the shim coil 24 are, for example, cylindrical, and the shim coil 24 is arranged coaxially with the static fieldmagnet 22 inside the static field magnet 22 .
[0046] Here, as an example, the mutually orthogonal X-axis, Y-axis, and Z-axis of the device coordina...
no. 2 Embodiment approach ＞
[0279] Next, the MRI apparatus 20B of the second embodiment will be described. In addition, since the MRI apparatus 20B of the second embodiment differs from the first embodiment only in the recovery method of the backup MR signal data, only the difference will be described.
[0281] In addition, the MRI apparatus 20B has, in the imaging room, a data-collecting type charging unit 620 , a frame 21 , an examination table 32 , a top plate 34 ...
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Abstract
The MRI apparatus (20A) according to one embodiment comprises an RF coil device (100A), a first wirelesscommunication unit (200A), second wireless communication units (300), an image reconstruction unit (56), and an assessment unit (412). The RF coil device detects and digitizes MR signals from the subject. The RF coil device comprises a data protection unit for storing the MR signals. The first wirelesscommunication unit wirelessly transmits the MR signals digitized by the RF coil device. The second communication units receive said MR signals. The image reconstruction unit reconstructs the image data on the basis of the received MR signals. The assessment unit assesses whether or not there has been a transmission failure in the wireless communication between the first and second wireless communication units. When there has been a transmission failure, the first wireless communication unit wirelessly transmits the MR signals stored in the data protection unit to the second wireless communication units.
Description
technical field [0001] Embodiments of the invention relate to magnetic resonance imaging. Background technique [0002] MRI is an imaging method in which nuclear spins of a subject placed in a static magnetic field are magnetically excited by an RF pulse of a Larmor frequency, and an image is reconstructed from an MR signal accompanying the excitation. In addition, the above-mentioned MRI refers to magnetic resonance imaging (Magnetic Resonance Imaging), RF pulse refers to high-frequency pulse (radio frequency pulse), and MR signal refers to nuclear magnetic resonancesignal (nuclear magnetic resonance signal). [0003] Here, an RF coil device (Radio Frequency Coil Device) is used, for example, to transmit an RF pulse to the spins of atomic nuclei in the subject and detect the generated MR signal by flowing an RF pulse current into the coil. The RF coil device may be built in the MRI apparatus, but may be recognized by the control unit of the MRI apparatus by being connecte...
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