Toshiba Medical Systems Corporation

Canon Medical Systems Corporation

Kabushiki Kaisha Toshiba

National Cancer Center

Hiroki Taguchi

Masaharu Tsuyuki

Satoru Nakanishi

Zhou Yu

Jian Zhou

Liang Cai

Masakazu Matsuura

Tzu-Cheng Lee

Takuya Nemoto

Akshay Narayan Prabhu Verleker

Shinsuke Tsukagoshi

Tatsuo Maeda

Takahiro Goto

Naruomi Akino

Yoshinori Uebayashi

Kotaro Sekiya

Hirofumi Kuno

Yuki Houno

Keiichi Nomura

Satoshi Saito

Yuko Takamatsu

John Gulik

A medical data processing method according to an embodiment includes inputting first medical data relating to a subject imaged with a medical image capture apparatus to a learned model to configured to generate second medical data having lower noise than that of the first medical data and having a super resolution compared with the first medical data based on the first medical data to output the second medical data.

Medical data processing method, model generation method, medical data processing apparatus, and computer-readable non-transitory storage medium storing medical data processing program

A medical image processing method includes obtaining a first set of projection data by performing, with a first CT apparatus including a first detector with a first pixel size, a first CT scan of an object in a first imaging region of the first detector; obtaining a first CT image with a first resolution by reconstructing the first set of projection data; obtaining a processed CT image with a resolution higher than the first resolution by applying a machine-learning model for resolution enhancement to the first CT image; and displaying the processed CT image or outputting the processed CT image for analysis. The machine-learning model is obtained by training using a second CT image based on a second set of projection data acquired by a second CT scan of the object in a second imaging region with a second CT apparatus including a second detector with a second pixel size.

Medical image processing method, medical image processing apparatus, and computer readable non-volatile storage medium storing medical image processing program

An X-ray CT system includes an X-ray tube, an X-ray detector and processing circuitry. The processing circuitry is configured to cyclically change energy of the X-rays during one rotation of the X-ray tube around a subject. The processing circuitry is configured to perform a process including a correcting process addressing a difference in a transmission amount between X-rays having first energy and X-rays having second energy, on at least one selected from between: a plurality of first projection data sets acquired when the X-rays having the first energy were radiated; and a plurality of second projection data sets acquired when the X-rays having the second energy were radiated. The processing circuitry is configured to reconstruct an image on the basis of a combined data set generated on the basis of a plurality of projection data sets including the projection data sets resulting from the process.

X-ray CT system and processing method

An X-ray CT system according to an embodiment includes processing circuitry configured to: execute first scanning of acquiring a first subject data set corresponding to first X-ray energy by irradiating a first region of a subject with X-rays; execute, after the first scanning, second scanning of acquiring a second subject data set corresponding to second X-ray energy and a third subject data set corresponding to third X-ray energy different from the second X-ray energy by irradiating a second region included in the first region with X-rays; and perform material decomposition among a plurality of reference materials based on: a fourth subject data set obtained based on the first subject data set and one of the second subject data set and the third subject data set; and the other of the second subject data set and the third subject data set.

X-ray CT system and medical processing apparatus

A medical processing apparatus includes processing circuitry. Based on a first number of X-ray datasets that correspond to the first number of energies and that are acquired by scanning a subject with X-rays, the processing circuitry generates a second number of virtual monochromatic X-ray datasets, which is a number larger than the first number. Based on the second number of virtual monochromatic X-ray datasets, the processing circuitry estimates quantities of the second number of reference materials mixed or a mixing ratio between the second number of reference materials for each of multiple positions in the subject.

Medical processing apparatus, X-ray diagnosis system, and medical processing method

An X-ray CT apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to detect X-rays that have passed through a subject by using a detector and to acquire projection data on a basis of a detection result. The processing circuitry is configured to obtain position information of a highly X-ray absorbent member in the body of the subject. The processing circuitry is configured to derive information about transmission paths of the X-rays in accordance with a processing effect of an artifact reducing process performed on the highly X-ray absorbent member, on the basis of the position information of the highly X-ray absorbent member.

X-ray CT apparatus including processing circuitry to perform a metal-artifact reducing process

An X-ray computed tomography apparatus according to the present embodiment comprises a gantry and a tube current setting circuitry. The tube current setting circuitry set tube currents for the respective imaging regions. To be specific, the tube current setting circuitry calculate X-ray absorption index values in the respective imaging regions, based on scanogram image data, determine tube current values corresponding to the X-ray absorption index values for the respective imaging regions, and correct the tube current values of the respective imaging regions except for a reference region based on a relative relationship between an X-ray absorption index value of the reference imaging region and tube current values of the other imaging regions.

X-ray computed tomography apparatus

An X-ray computed tomography apparatus according to embodiments includes image processing circuitry and decomposition circuitry. The image processing circuitry is configured to perform an image processing on each of a plurality of pieces of monochromatic X-ray image data of different energies, the plurality of pieces of monochromatic X-ray image data being generated from projection data. The decomposition circuitry is configured to decompose, for each of a plurality of basis materials specified in advance, the plurality of pieces of monochromatic X-ray image data after the image processing, to generate basis material image data of each of the plurality of basis materials.

X-ray computed tomography apparatus and medical image processing apparatus

A medical image processing apparatus according to an embodiment includes a separating unit, a reconstructing unit, and an extracting unit. The separating unit separates projection data into pieces of line-integrated data each of which corresponds to a different one of basis materials set in advance. The reconstructing unit reconstructs pieces of basis material image data from the pieces of line-integrated data each of which corresponds to a different one of the basis materials, the pieces of basis material image data being configured so that each pixel value of each of pixels indicates an abundance ratio of corresponding each of the basis materials that is present at each of the pixel. The extracting unit extracts an artifact region, on a basis of attenuation coefficients of each of the pixels calculated from the pieces of basis material image data each of which corresponds to a different one of the basis materials.

Medical image processing apparatus and X-ray computed tomography apparatus

An X-ray CT apparatus has a scanner, a pre-scan control unit, an image generating unit, a region setting unit and a timing sensing unit. The pre-scan control unit controls an operation of the scanner to perform a pre-scan. The image generating unit generates image data of the object based upon the pre-scan. The region setting unit sets, on the basis of the image data, a region of interest, and a larger region encompassing the region of interest and a region around the region of interest and being used to determine whether or not a high pixel value region exists. The timing sensing unit senses, if the larger region does not include a pixel value higher than a first threshold, a timing to start a main scan, at which a pixel value of the region of interest exceeds a second threshold after injection of the contrast medium agent is started.

X-ray CT apparatus and image processing method

The X-ray CT apparatus includes an X-ray tube, a high-voltage power supply, an X-ray detector and a processing circuitry. The processing circuitry reconstructs, as a first image, any of a monochromatic X-ray image and a polychromatic X-ray image on a basis of pre-reconstruction data acquired by scanning an object, the polychromatic X-ray image being taken in a first X-ray energy band. The processing circuitry reconstructs, as a second image, a polychromatic X-ray image taken in a second X-ray energy band wider than the first X-ray energy band on a basis of a pre-reconstruction data acquired by scanning the object. The processing circuitry identifies an area of a correction target in the first image as a correction area. The processing circuitry corrects the correction area in the second image on a basis of the first image.

X-ray CT apparatus and image processing apparatus

An X-ray CT apparatus includes an image generating unit, a discrimination unit, a monochromatic X-ray image generating unit, a combined-image generating unit and a display unit. The image generating unit generates a plurality of reference material images corresponding to respective ones of a plurality of reference materials on a basis of pre-reconstruction data of multi-energy obtained by scanning a subject. The discrimination unit discriminates each of a plurality of materials contained in an imaging region of the subject on a basis of the plurality of reference material images. The monochromatic X-ray image generating unit generates a monochromatic X-ray image at energy determined by each of the plurality of discriminated materials. The combined-image generating unit combines a plurality of monochromatic X-ray images corresponding to the plurality of materials and to generate a combined image. The display unit displays the combined image on a display device.

X-ray CT apparatus, image processing apparatus, and image processing method

Based on a plurality of detection data sets acquired by a data acquisition unit and correspond to respective tube voltages, an image generator generates a plurality of reference substance image data sets targeting respective reference substances contained in a subject. The image generator generates a correction data set for each of the plurality of tube voltages by applying, to a detection data set corresponding to each of the tube voltages, a correction coefficient for suppressing a discrepancy of an actual energy spectrum of the X-rays detected by an X-ray detector from a predetermined X-ray energy spectrum, and generates the plurality of reference substance image data sets based on a plurality of correction data sets corresponding to the respective tube voltages.

X-ray computed tomography imaging apparatus and photon counting CT apparatus

An X-ray CT apparatus of an embodiment displays an image of the inside of an object based on projection data obtained by scanning the object, and comprises a generator, a converter, an image forming part and an identifier. The generator scans the object with each of X-rays of different energy levels and generates multiple projection data. The converter converts the multiple projection data into multiple new projection data corresponding to multiple reference substances. The image forming part reconstructs each of the multiple new projection data converted by the converter, thereby forming multiple reference substance images corresponding to the multiple reference substances. The identifier identifies a target substance based on a correlation of pixel values in the multiple reference substance images.

X-ray CT apparatus, substance identifying method, and image processing apparatus

An image diagnostic apparatus of an embodiment includes a density change acquisition unit, a trigger generating unit and a control unit. The density change acquisition unit is configured to acquire data corresponding to a temporal change in density of a contrast agent injected into an object. The trigger generating unit is configured to generate a trigger when abnormal data has been detected by a first threshold processing of the data. The trigger is generated by a second threshold processing of data other than the abnormal data. The control unit is configured to perform a control of contrast imaging for the object based on the trigger.

Growing community of inventors

Otawara, Japan

Hiroki Taguchi