Abstract: A ringing correction unit that performs Gibbs ringing correction on an image reconstructed at a reconstruction matrix size having a predetermined matrix ratio to a matrix size of measurement data is prepared, and in image reconstruction, first, reconstruction is performed at the reconstruction matrix size in which the matrix size of the measurement data and the reconstruction matrix size have the predetermined matrix ratio, to obtain an intermediate reconstructed image. The ringing correction is performed on the intermediate reconstructed image by the ringing correction unit, and then the intermediate reconstructed image is transformed into k-space data and reconstructed at a final image reconstruction matrix size.

Abstract: Provided is a technology capable of effectively obtaining a ringing correction effect even for a two-dimensional image or a three-dimensional image with a simple CNN configuration. A CNN that has been trained to perform ringing correction for a direction of a dimension lower than a dimension of an image that is a correction target is prepared, and the CNN is applied in multiple stages to perform the ringing correction. For training the CNN, an image captured by increasing a measurement matrix size in one or two directions need only be used, thereby reducing an imaging time for acquiring training data and a burden of data processing, and enabling handling of images of various dimensions.

Abstract: Provided is a technology of ensuring data consistency between an image after a CNN is applied and an image before the CNN is applied with a simple CNN configuration in a case in which Gibbs ringing in an MR image is corrected by using the CNN. An MRI apparatus includes a ringing correction unit that performs ringing correction by using a CNN, in which the ringing correction unit performs a Fourier transform on an image after the CNN is applied to restore the image to k-space data, combines a region of the k-space data corresponding to a measurement matrix region of the image before the CNN is applied with the measurement data of the image before the CNN is applied to obtain k-space data in which the measurement matrix region is replaced with the measurement data of the image before the CNN is applied. An inverse Fourier transform is performed on the k-space data to obtain a final image.

Abstract: Provided is a technology capable of reducing a load during a training process and an application process of a CNN, and performing effective ringing correction in accordance with a sampling pattern. An aspect of the present invention provides an MRI apparatus including, as a ringing correction unit, a CNN for each sampling pattern. The CNN is trained by using a correct answer image in which rectangular or rectangular parallelepiped ringing in has not occurred and a plurality of processed pattern images. In the application of the CNN, measurement data is reconstructed at a desired reconstruction matrix size by performing zero-filling on the measurement data, and then a CNN corresponding to the sampling pattern of the measurement data is selected and applied to perform the ringing correction in a real space.

Abstract: A filter device having a pass band and a stop band on a lower frequency side than the pass band includes a filter having a pass band including the pass band, a series arm resonator connected in series to the filter, a first inductor directly connected in series to the series arm resonator, and a parallel arm resonator connected between a node on a path connecting the filter and the series arm resonator and the ground. The parallel arm resonator constitutes a resonance circuit having a resonant frequency at which an attenuation pole corresponding to a high frequency end of the first stop band, and the series arm resonator and the inductor constitute a resonance circuit having an anti-resonant frequency on a lower frequency side than the pass band and having a sub-resonant frequency higher than a resonant frequency of the resonance circuit.

Abstract: A filter includes first and second input/output terminals; an LC parallel resonance circuit that includes an inductor L1 and a capacitor C1 connected to each other in parallel; and an acoustic wave series resonance circuit that includes series arm resonators s1 and s2 connected to each other in series. The LC parallel resonance circuit and the acoustic wave series resonance circuit are connected to each other in series between the first input/output terminal and the second input/output terminal.

Abstract: Provided is a method for performing reconstruction and noise removal with high accuracy on various undersampling patterns including equidistant undersampling. An image processing unit that processes measurement data acquired by an MRI apparatus performs image reconstruction by using measurement data on respective channels measured in a predetermined undersampling pattern and sensitivity distributions of respective reception coils. At this time, denoising of a reconstructed image and a calculation for maintaining consistency between original measurement data and the measurement data on the respective channels created from denoised images are sequentially processed. Accordingly, image restoration and denoising with high accuracy are possible without depending on the undersampling pattern.

Abstract: A radio-frequency module includes a mounting substrate having a first main surface, an electronic component, and a second receive filter. The electronic component includes a transmit filter and a first receive filter and is disposed on the first main surface of the mounting substrate. The second receive filter is stacked on the electronic component. The pass band of the transmit filter and that of the second receive filter do not exactly match each other. In a plan view in a thickness direction of the mounting substrate, a first region of the electronic component where the first receive filter is located overlaps or matches the second receive filter, and a second region of the electronic component where the transmit filter is located overlaps none of filters disposed on the first main surface of the mounting substrate.

Abstract: By a data processing method or a communication system, input data is acquired, first processing that is processing of reducing a data amount of the input data is performed, second processing of converting data obtained by the first processing into data having a preset format configured to be handled by an in-vehicle device unit is performed, third processing of converting data obtained by the second processing into normalization data configured to be handled by a cloud server is performed, and vehicle data is provided to the cloud server.

Abstract: A vehicle system includes: an in-vehicle device configured to communicate with a cloud server configured to manage vehicle data; and an expansion unit that is detachably attached to the in-vehicle device. The expansion unit includes: an input line for each communication protocol of input data; an output line for each communication protocol of output data; a connector for connecting the output line to the in-vehicle device; and a processing unit configured to perform processing on input data and cause the output line to output the output data. The in-vehicle device includes: a controller configured to generate the vehicle data based on the received output data; and a communication unit configured to transmit the vehicle data.

Abstract: To suppress degradation of characteristics, a high frequency module includes a mounting substrate, a first signal terminal, a second signal terminal, and ground terminals, and a hybrid filter. The hybrid filter is coupled between the first signal terminal and the second signal terminal. The hybrid filter includes an acoustic wave filter having at least one acoustic wave resonator, a first inductor, and a capacitor. The pass band width of the hybrid filter is larger than that of the acoustic wave resonator. A resin layer is disposed on a first principal surface of the mounting substrate. The resin layer covers at least part of the acoustic wave filter. A metal electrode layer covers at least part of the resin layer, and is coupled to the ground terminals. The second inductor is coupled between the hybrid filter and the second signal terminal.

Abstract: In an image noise reduction process using a CNN, noise can be reduced effectively irrespective of signal levels and noise levels of the image. Noise information and signal level information are calculated from an image inputted in the CNN. Using the calculated information, a normalization factor suitable for the CNN is determined, and normalization of the input image is performed. The noise information is estimated from magnitude of background noise of the input image in the case where the input image is an MRI image. The signal information can be calculated, for example, as a mean value of pixel values of a subject region with respect to an image obtained by dividing the input image by the magnitude of the background noise.

Abstract: Provided is a method for performing reconstruction and noise removal with high accuracy on various undersampling patterns including equidistant undersampling. An image processing unit that processes measurement data acquired by an MRI apparatus performs image reconstruction by using measurement data on respective channels measured in a predetermined undersampling pattern and sensitivity distributions of respective reception coils. At this time, denoising of a reconstructed image and a calculation for maintaining consistency between original measurement data and the measurement data on the respective channels created from denoised images are sequentially processed. Accordingly, image restoration and denoising with high accuracy are possible without depending on the undersampling pattern.

Abstract: In a radio-frequency module, a hybrid filter includes an acoustic wave filter including at least one acoustic wave resonator, an inductor having a winding portion, and a capacitor. A plurality of outer electrodes of the acoustic wave filter includes a first input and output electrode connected to a first signal terminal, a second input and output electrode connected to a second signal terminal, and a ground electrode connected to a ground terminal. The inductor is disposed on a first major surface of a mounting substrate and is adjacent to the acoustic wave filter in plan view in a thickness direction of the mounting substrate. When viewed in a direction of a winding axis of the winding portion of the inductor, an inner part of the winding portion in the inductor does not overlap any of the first input and output electrode, the second input and output electrode, and ground electrode.

Abstract: To provide a technique in which, in imaging using an EPI method, an occurrence of an artifact when phase correction is performed for each channel is avoided and the phase correction is accurately performed. A common phase correction value to be applied to data of all channels is calculated using pre-scan data of each channel. The common phase correction value is obtained by combining a difference phase obtained for each of the channels. The difference phase is obtained by complex integration, while an absolute value of each channel is maintained as it is. The combination is performed by complex average, and averaging processing according to a weight of the absolute value is performed. The occurrence of an artifact can be prevented by using the common phase correction value, and robust phase correction can be performed by including the weight of the absolute value.

Abstract: To provide a technique in which, in imaging using an EPI method, an occurrence of an artifact when phase correction is performed for each channel is avoided and the phase correction is accurately performed. A common phase correction value to be applied to data of all channels is calculated using pre-scan data of each channel. The common phase correction value is obtained by combining a difference phase obtained for each of the channels. The difference phase is obtained by complex integration, while an absolute value of each channel is maintained as it is. The combination is performed by complex average, and averaging processing according to a weight of the absolute value is performed. The occurrence of an artifact can be prevented by using the common phase correction value, and robust phase correction can be performed by including the weight of the absolute value.

Abstract: A filter device having a pass band and a stop band on a lower frequency side than the pass band includes a filter having a pass band including the pass band, a series arm resonator connected in series to the filter, a first inductor directly connected in series to the series arm resonator, and a parallel arm resonator connected between a node on a path connecting the filter and the series arm resonator and the ground. The parallel arm resonator constitutes a resonance circuit having a resonant frequency at which an attenuation pole corresponding to a high frequency end of the first stop band, and the series arm resonator and the inductor constitute a resonance circuit having an anti-resonant frequency on a lower frequency side than the pass band and having a sub-resonant frequency higher than a resonant frequency of the resonance circuit.

Abstract: A filter includes first and second input/output terminals; an LC parallel resonance circuit that includes an inductor L1 and a capacitor C1 connected to each other in parallel; and an acoustic wave series resonance circuit that includes series arm resonators s1 and s2 connected to each other in series. The LC parallel resonance circuit and the acoustic wave series resonance circuit are connected to each other in series between the first input/output terminal and the second input/output terminal.

Abstract: A filter device having a pass band and a stop band on a lower frequency side than the pass band includes a filter having a pass band including the pass band, a series arm resonator connected in series to the filter, a first inductor directly connected in series to the series arm resonator, and a parallel arm resonator connected between a node on a path connecting the filter and the series arm resonator and the ground. The parallel arm resonator constitutes a resonance circuit having a resonant frequency at which an attenuation pole corresponding to a high frequency end of the first stop band, and the series arm resonator and the inductor constitute a resonance circuit having an anti-resonant frequency on a lower frequency side than the pass band and having a sub-resonant frequency higher than a resonant frequency of the resonance circuit.

Abstract: A filter device having a pass band and a stop band on a lower frequency side than the pass band includes a filter having a pass band including the pass band, a series arm resonator connected in series to the filter, a first inductor directly connected in series to the series arm resonator, and a parallel arm resonator connected between a node on a path connecting the filter and the series arm resonator and the ground. The parallel arm resonator constitutes a resonance circuit having a resonant frequency at which an attenuation pole corresponding to a high frequency end of the first stop band, and the series arm resonator and the inductor constitute a resonance circuit having an anti-resonant frequency on a lower frequency side than the pass band and having a sub-resonant frequency higher than a resonant frequency of the resonance circuit.