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1.发明公开
公开(公告)号：EP3978943A1
公开(公告)日：2022-04-06
申请号：EP20199493.6
申请日：2020-10-01
发明人： SHRESTHA, Rameswor , VAN LIERE, Filips , OUZOUNOV, Sotir Filipov , TOTEV, Emil Dimitrov , POL, Ketan Jayant
IPC分类号： G01R33/36 , G01R33/341
摘要： According to the invention, a radio frequency receiver system (1) for an MRI apparatus is provided which comprises a receive coil (2) for being attached to a patient which is to be examined by the MRI apparatus and which in such a state in which it is attached to the patient exhibits a total effective coil impedance which is composed of the coil impedance(5) of the coil itself and the patient impedance (4) due to the patient to who the coil is attached, an amplifier (6) which exhibits the lowest noise impedance and which is connected to the receive coil (2) for amplifying a signal received from the receive coil (2) and outputting an amplified output signal, an analog-to-digital (7) converter which is connected to the amplifier (6) for converting the amplified output signal from the amplifier (6) to a digital signal for further processing, a matching network (8) which is interconnected between the receive coil (2) and the amplifier (6) and which comprises a matching system (10) with an adjustable impedance (16) for matching the total effective coil impedance to the lowest noise impedance , and a noise calculation unit (15) which is connected to the analog-to-digital converter (7) for receiving the digital output signal of the analog-to-digital converter (7) and which is adapted for calculating the noise of the output signal of the analog-to-digital converter (7) and for adjusting the adjustable impedance of the matching network (8) In this way, a possibility is provided for calibrating the matching network for every patient individually before the scanning process.
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公开(公告)号：EP3519842A1
公开(公告)日：2019-08-07
申请号：EP17784221.8
申请日：2017-09-29
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公开(公告)号：EP4253979A1
公开(公告)日：2023-10-04
申请号：EP22164650.8
申请日：2022-03-28
IPC分类号： G01R33/3415 , G01R33/48 , A61B5/24 , A61B5/00 , G01R33/36
摘要： The invention relates to the field of magnetic resonance (MR) receiver coil arrays (1), and in particular to a magnetic receiver coil array (1) with an additional sensor node (3). The sensor node (3) comprises a sensor (23) for gathering measurement data and a sensor signal acquisition circuit (25), wherein the sensor signal acquisition circuit (25) is configured to digitize the gathered measurement data. The sensor signal acquisition circuit (25) is connected to the digital amplifier signal acquisition circuit (16) via a first digital interface (27). The sensor signal acquisition circuit (25) is configured to link the digitized measurement data from the sensor signal acquisition circuit (25) to the digital amplifier module (4) via the first digital interface (27), wherein the digital amplifier module (4) is configured to combine the digitized measurement data from the sensor signal acquisition circuit (25) and the digital amplified MR signal. The MR receiver coil array (1) comprising a merger module (6), wherein the merger module (6) is configured to receive the combined digital MR signal and the digitized measurement data from the digital amplifier module (4) by a second digital interface (28) and to output the combined data to a back-end of the MR imaging system. Based on the additional data thus obtained by means of the sensors (23), MR imaging can be improved. The invention relates also to a MR imaging device and a computer program product.
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公开(公告)号：EP3805772A1
公开(公告)日：2021-04-14
申请号：EP19202384.4
申请日：2019-10-10
发明人： VAN LIERE, Filips
IPC分类号： G01R33/3415 , G01R33/36
摘要： Disclosed herein is a medical instrument comprising (100, 200, 400) a magnetic resonance imaging receive antenna (101, 101'). The magnetic resonance imaging receive antenna comprises multiple antenna elements (102) each configured for receiving a magnetic resonance imaging radio-frequency signal. The magnetic resonance imaging receive antenna further comprises a radio-frequency receiver (104) connected to each of the multiple antenna elements, wherein the radio-frequency receiver is configured to receive the magnetic resonance imaging radio frequency signal and to convert the radio frequency signal to digital magnetic resonance data (902). The magnetic resonance imaging receive antenna further comprises a digital combiner (108). The digital combiner is configured to combine a weighted combination of the digital magnetic resonance data from each of the radio frequency signals into a chosen number of digital virtual magnetic resonance channels using a set of weighting factors (904). The magnetic resonance imaging receive antenna further comprises a first digital communication transceiver (110) configured for transmitting the digital virtual magnetic resonance channels via a digital communication channel (112).
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公开(公告)号：EP4042175A1
公开(公告)日：2022-08-17
申请号：EP20775315.3
申请日：2020-09-24
发明人： VAN LIERE, Filips
IPC分类号： G01R33/3415 , G01R33/36
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公开(公告)号：EP3985878A1
公开(公告)日：2022-04-20
申请号：EP20201432.0
申请日：2020-10-13
IPC分类号： H03M3/00
摘要： For a radio frequency (RF) receiver system (1) for providing magnetic resonance (MR) information from an examination space of a MR imaging system, a solution for increasing the dynamic range of the radio frequency (RF) receiver system (1) for a better imaging performance shall be created. A sigma delta ADC of the RF receiver system operates in single-bit mode with an automatic gain gontrol (AGC) circuit used to control the DAC feedback strength thereby extending the dynamic range of the receiver to match the MRI signal. The present invention also refers to a magnetic resonance (MR) imaging system, a method A method for extending the dynamic range of a radio frequency (RF) receiver system, a software package for a magnetic resonance (MR) imaging system, a software package for upgrading a magnetic resonance (MR) imaging system and a computer program product.
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公开(公告)号：EP4285134A1
公开(公告)日：2023-12-06
申请号：EP22700419.9
申请日：2022-01-24
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