Abstract: The present invention provides a burst noise canceling apparatus which can remove burst noises even in a one-time data, without the need of a large amount of memory.

Abstract: In order to output amplitude data with the clock frequency higher than the clock frequency of phase data, the direct digital synthesizer for transmission and detection comprises: a transmitting phase for outputting a first phase data with a first clock frequency; a curtailing unit for outputting a second phase data with a second clock frequency smaller than the first clock frequency, and outputting additional data for compensating for phase information disappeared with curtailing process; an interpolating unit for outputting a third phase data with a third clock frequency larger than the first frequency by implementing interpolating process to the second phase data, and a detecting waveform for outputting amplitude data in accordance with the third phase data. The detecting signal amplitude data can be outputted with the third clock frequency higher than the second clock frequency of the second phase data transmitted.

Abstract: An MRI apparatus includes: an RF coil to which analog RF pulse signals are applied; an RF pulse generating circuit which generates said analog RF pulse signals; and a magnetic resonance signal receiving circuit which receives analog magnetic resonance signals and converts these signals into baseband digital magnetic resonance signals, said RF pulse generating circuit comprising: a carrier signal generator which generates a digital carrier signal having a predetermined number of bits; a digital modulator which modulates said digital carrier signal with a digital envelope signal, thus generating digital RF pulse signals; a digital-analog converter which converts said digital RF pulse signals into the analog RF pulse signals; and an inversion unit which generates a digital inverted carrier signal having a two's complement relationship with said digital carrier signal and sends the digital inverted carrier signal to said magnetic resonance signal receiving circuit, said magnetic resonance signal receiving circuit

Abstract: With the aim of reducing noise due to a digital signal in an A-D conversion unit, the following is implemented: an input unit is provided with four A-D converters and a gray code conversion unit. An analog NMR signal corresponding to each channel is inputted to each A-D converter, and the gray code conversion unit converts a digital signal represented in binary code, outputted from the A-D converters, into a digital signal represented in gray code. A gray code-converted digital signal is transferred to an output unit through a digital signal bus. The gray code digital signal is returned to a binary digital signal by a gray code inverse conversion unit, and then the output unit transmits a binary signal, outputted from the gray code inverse conversion unit, to a signal processing unit.

Abstract: An MRI apparatus includes: an RF coil to which analog RF pulse signals are applied; an RF pulse generating circuit which generates said analog RF pulse signals; and a magnetic resonance signal receiving circuit which receives analog magnetic resonance signals and converts these signals into baseband digital magnetic resonance signals, said RF pulse generating circuit comprising: a carrier signal generator which generates a digital carrier signal having a predetermined number of bits; a digital modulator which modulates said digital carrier signal with a digital envelope signal, thus generating digital RF pulse signals; a digital-analog converter which converts said digital RF pulse signals into the analog RF pulse signals; and an inversion unit which generates a digital inverted carrier signal having a two's complement relationship with said digital carrier signal and sends the digital inverted carrier signal to said magnetic resonance signal receiving circuit, said magnetic resonance signal receiving circuit

Abstract: A method for simulating operation or installation of a diagnostic imaging device which is displayed on a display device at a customer location without having the imaging device located at the customer location and using a server which is located remote from the customer location and a network connecting the remote server to the customer, wherein the remote server stores information regarding simulation operation, display, installation, replay and dummy of the imaging device.

Abstract: With the aim of reducing noise due to a digital signal in an A-D conversion unit, the following is implemented: an input unit is provided with four A-D converters and a gray code conversion unit. An analog NMR signal corresponding to each channel is inputted to each A-D converter, and the gray code conversion unit converts a digital signal represented in binary code, outputted from the A-D converters, into a digital signal represented in gray code. A gray code-converted digital signal is transferred to an output unit through a digital signal bus. The gray code digital signal is returned to a binary digital signal by a gray code inverse conversion unit, and then the output unit transmits a binary signal, outputted from the gray code inverse conversion unit, to a signal processing unit.

Abstract: The present invention provides a burst noise canceling apparatus which can remove burst noises even in a one-time data, without the need of a large amount of memory.

Abstract: In order to output amplitude data with the clock frequency higher than the clock frequency of phase data, the direct digital synthesizer for transmission and detection comprises: a transmitting phase for outputting a first phase data with a first clock frequency; a curtailing unit for outputting a second phase data with a second clock frequency smaller than the first clock frequency, and outputting additional data for compensating for phase information disappeared with curtailing process; an interpolating unit for outputting a third phase data with a third clock frequency larger than the first frequency by implementing interpolating process to the second phase data, and a detecting waveform for outputting amplitude data in accordance with the third phase data. The detecting signal amplitude data can be outputted with the third clock frequency higher than the second clock frequency of the second phase data transmitted.

Abstract: A method of eliminating unnecessary frequency components using a quadrature detector. The method includes converting an analog input signal into a digital signal f1(t), and the signal f1 (t) is delayed by a sampling time ? to form a signal f2 (t). Then, letting the reference frequency be ?0, the I- and Q-components in quadrature detection by the following expression: I={f2(t)*sin ?0t?f1(t)*sin ?0(t??)}/sin ?0? Q={f2(t)*cos ?0t?f1(t)*cos ?0(t??)}/sin ?0?.

Abstract: To provide a quadrature detector wherein unnecessary frequency components are not produced, the following procedure is carried out: an analog input signal is converted into a digital signal f1(t), and the signal f1(t) is delayed by a sampling time ? to form a signal f2(t). Then, letting the reference frequency be ?0, the I- and Q-components in quadrature detection by the following expression: I={f2(t)*sin ?0t?f1(t)*sin ?0(t??)}/sin ?0? Q={f2(t)*cos ?0t?f1(t)*cos ?0(t??)}/sin ?0? The signal processing based on the above expression is carried out by a circuit comprising delaying means, multiplying means, and subtracting means.

Abstract: To automatically display an installing image of a medical image diagnostic device, the dimensions (width, depth and height) of an imaging room and the installing model of the medical image diagnostic device are specified in an installing parameter display region of an installation simulation Web Page screen. Then, an installing image display region automatically displays installing images (bird's eye, plan and front views) when the medical image diagnostic device is installed virtually in she imaging room. When viewpoint change click points are clicked, the installing image displayed is updated to an installing image changing the viewpoint.