Abstract: The image processing device 1X includes an acquisition means 30X and a lesion detection means 34X. The acquisition means 30X acquires an endoscopic image obtained by photographing an examination target by a photographing unit provided in an endoscope. The lesion detection means 34X detects a lesion based on a selection model which is selected from a first model and a second model, the first model being configured to make an inference regarding a lesion of the examination target based on a predetermined number of endoscopic images, the second model being configured to make an inference regarding a lesion of the examination target based on a variable number of endoscopic images. Besides, the lesion detection means 34X changes a parameter to be used for detection of the lesion based on a non-selection model that is the first model or the second model other than the selection model.

Abstract: The image processing device 1X includes an acquisition means 30X, a variation detection means 311X, a selection means 312X, and a lesion detection means 34X. The acquisition means 30X acquires an endoscopic image obtained by photographing an examination target by a photographing unit provided in an endoscope. The variation detection means 311X detects a degree of variation between the endoscopic images. The selection means 312X selects either one of a first model or a second model based on the degree of variation, the first model making an inference regarding a lesion of the examination target based on a predetermined number of the endoscopic images, the second model making an inference regarding the lesion based on a variable number of the endoscopic images. The lesion detection means 34X detects the lesion based on a selection model that is either the first model or the second model selected.

Abstract: The image processing device 1X includes an acquisition means 30X and a lesion detection means 34X. The acquisition means 30X acquires an endoscopic image obtained by photographing an examination target by a photographing unit provided in an endoscope. The lesion detection means 34X detects a lesion based on a selection model which is selected from a first model and a second model, the first model being configured to make an inference regarding a lesion of the examination target based on a predetermined number of endoscopic images, the second model being configured to make an inference regarding a lesion of the examination target based on a variable number of endoscopic images. Besides, the lesion detection means 34X changes a parameter to be used for detection of the lesion based on a non-selection model that is the first model or the second model other than the selection model.

Abstract: An MRI apparatus comprising a signal analyzing unit for determining a feature quantity of a navigator signal, and obtaining data representing a temporal change of the feature quantity for each coil element; a transforming unit for transforming the data obtained for each coil element into frequency spectra FS1 to FS16; and a selecting unit for selecting a coil element for determining a signal value of a body-motion signal for the subject from among coil elements E1 to E16 based on the frequency spectra FS1 to FS16.

Abstract: An MRI system for performing time resolved MR imaging of an object with grouped data acquisition is provided. The MRI system includes an MRI controller in electronic communication with a magnet assembly and operative to sample a group of data points within a first region of a k-space. The first region includes a central sub-region and a first peripheral sub-region. The MRI controller is further operative to sample a group of data points within a second region of the k-space. The second region includes the central sub-region and a second peripheral sub-region different from the first peripheral sub-region.

Abstract: Methods and systems are disclosed herein for selecting a channel adapted to detection of the position of a liver. The position “m” of the border between the liver and the lung is obtained from a profile. A sum Sliver of signal intensities in a liver region R1 and a sum Slung of signal intensities in a lung region R2 are calculated. Sliver and Slung are compared. In the case where Sliver is equal to or less than Slung (Sliver?Slung), a channel is not selected as a channel used at the time of detecting the position of the edge of the liver. On the other hand, in the case where Sliver is larger than Slung (Sliver>Slung), a channel is selected as a channel used at the time of detecting the position of the edge of the liver.

Abstract: An MRI apparatus comprising a signal analyzing unit for determining a feature quantity of a navigator signal, and obtaining data representing a temporal change of the feature quantity for each coil element; a transforming unit for transforming the data obtained for each coil element into frequency spectra FS1 to FS16; and a selecting unit for selecting a coil element for determining a signal value of a body-motion signal for the subject from among coil elements E1 to E16 based on the frequency spectra FS1 to FS16.

Abstract: An MRI system for performing time resolved MR imaging of an object with grouped data acquisition is provided. The MRI system includes an MRI controller in electronic communication with a magnet assembly and operative to sample a group of data points within a first region of a k-space. The first region includes a central sub-region and a first peripheral sub-region. The MRI controller is further operative to sample a group of data points within a second region of the k-space. The second region includes the central sub-region and a second peripheral sub-region different from the first peripheral sub-region.

Abstract: To provide an imaging technique suitable for acquiring an image with reduced artifacts due to differences in signal intensity. An MR apparatus 100 acquires, in data acquisition periods A1, A2, and A3, data at part of grid points lying closer to a high-frequency region RH within a low-frequency region RL, and data at part of grid points lying closer to the low-frequency region RL within the high-frequency region RH. On the other hand, in a data acquisition period B, it acquires data at another part of grid points lying closer to the high-frequency region RH within the low-frequency region RL, and data at another part of grid points lying closer to the low-frequency region RL within the high-frequency region RH.

Abstract: A magnetic resonance apparatus which acquires navigator signals generated from a navigator region including a first portion and a second portion, the navigator signals acquired using a coil having a plurality of channels, is provided. The magnetic resonance apparatus includes a scan unit configured to execute a first navigator sequence for acquiring first navigator signals generated from the navigator region, a profile generating unit configured to generate first profiles each including position information on the first portion for every channel, a determining unit configured to determine correlations between the first profiles and a template, and a selecting unit configured to select each channel used to acquire the position information on the first portion based on the correlations.

Abstract: A magnetic resonance imaging apparatus includes a scan section for executing a navigator sequence which transmits an RF pulse to a subject to obtain each magnetic resonance signal as navigator data. Upon execution of the navigator sequence, the scan section excites both a navigator area having two regions from which intensities of different navigator data signals are obtained, the two regions containing a body-moved region of the subject, and a region different from the two regions simultaneously, and transmits the RF pulse in such a manner that the phase of navigator data obtained from the different region differs from the phase of at least one region of navigator data obtained from the two regions.

Abstract: To provide an imaging technique suitable for acquiring an image with reduced artifacts due to differences in signal intensity. An MR apparatus 100 acquires, in data acquisition periods A1, A2, and A3, data at part of grid points lying closer to a high-frequency region RH within a low-frequency region RL, and data at part of grid points lying closer to the low-frequency region RL within the high-frequency region RH. On the other hand, in a data acquisition period B, it acquires data at another part of grid points lying closer to the high-frequency region RH within the low-frequency region RL, and data at another part of grid points lying closer to the low-frequency region RL within the high-frequency region RH.

Abstract: A magnetic resonance apparatus for performing a scan for generating a first magnetic resonance signal from an imaged part including a moving part is provided. The magnetic resonance apparatus includes a coil having a plurality of channels configured to receive the first magnetic resonance signal, a channel selecting unit configured to select a first channel disposed near an end of the moving part from the plurality of channels, and a generating unit configured to generate a biological signal including motion information indicating a movement of the imaged part in the scan, based on the first magnetic resonance signal received by the first channel.

Abstract: A magnetic resonance apparatus which acquires navigator signals generated from a navigator region including a first portion and a second portion, the navigator signals acquired using a coil having a plurality of channels, is provided. The magnetic resonance apparatus includes a scan unit configured to execute a first navigator sequence for acquiring first navigator signals generated from the navigator region, a profile generating unit configured to generate first profiles each including position information on the first portion for every channel, a determining unit configured to determine correlations between the first profiles and a template, and a selecting unit configured to select each channel used to acquire the position information on the first portion based on the correlations.

Abstract: A magnetic resonance imaging apparatus for acquiring k-space data from a deformable imaging region of a subject and generating image data of the imaging region at the time of being deformed to a predetermined state, based on the acquired k-space data, includes a gradient coil for applying a gradient magnetic field in a phase encoding direction, and an image data calculation device for calculating a numeric value for defining a relationship between the imaging region at the time of being deformed to the predetermined state and the imaging region at an nth phase encoding and calculating image data of the imaging region at the time of being deformed to the predetermined state, based on the calculated numeric value and the k-space data acquired from the imaging region.

Abstract: A magnetic resonance imaging apparatus includes a first navigator data processor that generates a first phase profile based on first navigator data acquired by executing a first navigator sequence, generates a position profile indicative of a relationship between a plurality of region positions and time at which the first navigator sequence is executed, and detects a specific position in the position profile. A second navigator data processor generates a second phase profile based on second navigator data acquired by executing a second navigator sequence, detects the position of each region with respect to each second phase profile within a reference range set so as to contain the specific position, based on each second phase profile, and acquires the same as its corresponding position data.

Abstract: A magnetic resonance imaging apparatus includes a scan execution unit configured to execute a regular scan in which a navigator sequence for generating a magnetic resonance signal in a navigator area containing a region of interest moving with a biological movement of a subject and an imaging sequence for generating a magnetic resonance signal in an imaging area of the subject are carried out, and a signal processing unit configured to detect a position of a region of interest based on a magnetic resonance signal generated by a navigator sequence in the regular scan and to generate an image based on the detected position and the magnetic resonance signal generated by the imaging sequence.

Abstract: A magnetic resonance imaging apparatus for acquiring k-space data from a deformable imaging region of a subject and generating image data of the imaging region at the time of being deformed to a predetermined state, based on the acquired k-space data, includes a gradient coil for applying a gradient magnetic field in a phase encoding direction, and an image data calculation device for calculating a numeric value for defining a relationship between the imaging region at the time of being deformed to the predetermined state and the imaging region at an nth phase encoding and calculating image data of the imaging region at the time of being deformed to the predetermined state, based on the calculated numeric value and the k-space data acquired from the imaging region.

Abstract: An MRI apparatus includes a navigator device for obtaining information of body motion produced by respiration of a subject by a navigator pulse sequence, and a respiration waveform display device for displaying a respiration waveform on the basis of the body motion information obtained by the navigator device.

Abstract: A magnetic resonance imaging apparatus executes scans for executing a navigator sequence for acquiring as navigator data a magnetic resonance signal from a navigator area containing tissues body-moved in a subject and executing an imaging sequence for acquiring a magnetic resonance signal from an imaging area as imaging data at the subject, thereby to generate an image with respect to the imaging area. The magnetic resonance imaging apparatus includes, a phase profile generating part which generates a phase profile so as to show a relationship between a phase of the navigator data and a position of the navigator area, a phase correcting part which corrects folding back of the phase profile generated by the phase profile generating part, and a position detecting part which detects a position of a tissue body-moved in the navigator area, based on the phase profile corrected by the phase correcting part.