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公开(公告)号：US20230131526A1
公开(公告)日：2023-04-27
申请号：US18047800
申请日：2022-10-19
发明人： Satoshi IMAI
摘要： In one embodiment, an MRI apparatus includes: a transmission circuit configured to apply a transmission pulse to an object; at least one radio frequency (RF) coil configured to include an active trap circuit provided with a PIN diode, and to receive a magnetic resonance signal from the object; a power supply circuit configured to apply a reverse bias voltage and a forward bias voltage to the PIN diode, and to apply multiple values of a forward current when the forward bias voltage is applied to the PIN diode; and a control circuit configured to control the power supply circuit in such a manner that the power supply circuit sets the forward current to the multiple values, depending on imaging conditions.
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公开(公告)号：US20210302515A1
公开(公告)日：2021-09-30
申请号：US17210625
申请日：2021-03-24
IPC分类号： G01R33/34
摘要： A radio frequency coil according to an embodiment is configured to receive a magnetic resonance signal from an examined subject. The radio frequency coil includes an expandable and contractible first element and an expandable and contractible second element. The radio frequency coil has an overlap region where a first loop formed by the first element overlaps with a second loop formed by the second element. The ratio of the area of the overlap region to the area of the region enclosed by the first loop changes in accordance with expansion/contraction of the first element forming the first loop. The first element and the second element include liquid metal in at least a part thereof.
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公开(公告)号：US20180314891A1
公开(公告)日：2018-11-01
申请号：US15960704
申请日：2018-04-24
发明人： Miyuki OTA , Mitsuo TAKAGI , Sadanori TOMIHA , Satoshi IMAI , Masahiro FUKUSHIMA , Manabu ISHII , Shinji MITSUI
摘要： A medical image diagnosis apparatus according to an embodiment includes a storage circuitry and processing circuitry. The storage circuitry is configured to store therein workflow information indicating a plurality of procedures related to a preparation for an imaging process. The processing circuitry is configured to analyze an image obtained by a camera. The processing circuitry is configured to identify which of the plurality of procedures has been performed on the basis of the workflow information and a result of the analysis performed on the image and to cause an informing device to provide information about one or more of the procedures corresponding to a result of the identifying.
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公开(公告)号：US20210132165A1
公开(公告)日：2021-05-06
申请号：US17070078
申请日：2020-10-14
发明人： Sadanori TOMIHA , Takafumi OHISHI , Sho KAWAJIRI , Satoshi IMAI
IPC分类号： G01R33/34
摘要： According to one embodiment, a coil element includes an extendable and contractible coil and a capacitor. The capacitor is connected to the coil and has an electrostatic capacity which changes due to a physical change in response to extension or contraction of the coil.
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公开(公告)号：US20180329004A1
公开(公告)日：2018-11-15
申请号：US15967793
申请日：2018-05-01
发明人： Satoshi IMAI , Sadanori TOMIHA , Keiichiro ISHI , Takaya MORI
IPC分类号： G01R33/36 , G01R33/483 , G01R33/54
CPC分类号： G01R33/3607 , G01R33/4833 , G01R33/543
摘要： A magnetic resonance imaging apparatus according to an embodiment includes a transmission coil and processing circuitry. The transmission coil is configured to apply a high frequency magnetic field to an object. The processing circuitry is configured to: derive, based on at least one of an imaging region and the body shape data of the object, a specific area in a field of view (FOV); and determine, based on a signal within the specific area, an output power level of a high frequency pulse signal supplied to the transmission coil.
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