Kabushiki Kaisha Toshiba

Toshiba Medical Systems Corporation

Johns Hopkins University

Fujita Health University

Canon Medical Systems Corporation

Fujita Academy

Takashi Ichihara

Nobutoku Motomura

Takuya Sakaguchi

Joao A C Lima

Richard T George

Albert Clark Lardo

Yoshihiro Ikeda

Takuzo Takayama

Tsutomu Yamakawa

Kazumasa Arakita

Kyojiro Nambu

Masahiro Ozaki

Eduardo Marban

Toshihiro Rifu

Takashi Masuzawa

Masanori Matsumoto

Jingwu Yao

Atsushi Habara

Jeff Trost

Akihiro Toshimitsu

Yutaka Fujiki

Omair Yousuf

Akiyoshi Kinda

Hiroharu Kawahara

Takahiro Natsume

Omair Khwaja Yousuf

A medical image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry sets a first region of interest in a region corresponding to cardiac muscle on a cross-section of a heart included in image data. The processing circuitry further sets a second region of interest that is larger than the first region of interest in a region including the region. The processing circuitry determines a threshold for determining a range of signal values used for blood flow dynamic analysis on the image data based on a frequency distribution of signal values in the first region of interest. The processing circuitry carries out blood flow dynamic analysis on the second region of interest using signal values included in a range based on the threshold.

Medical image processing apparatus and X-ray CT apparatus

An image processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to acquire pieces of change information indicating temporal changes in computed tomography (CT) values of a myocardium and a right ventricular of a subject based on a plurality of chronologically consecutive images that are generated by an X-ray CT apparatus by scanning the subject to which a contrast agent is administered. The processing circuitry is configured to correct the piece of change information on the myocardium based on the piece of change information on the right ventricular.

Image processing apparatus

According to one embodiment, a medical image diagnostic apparatus includes a storage unit, a blood flow information generation unit and a blood flow inhibition index generation unit. The storage unit stores volume data or data of a series of images regarding an organ of an object. The blood flow information generation unit generates, based on the volume data or the data of the series of images, first blood flow information of a first region and second blood flow information of a second region different from the first region. The blood flow inhibition index generation unit generates, based on the first blood flow information and the second blood flow information, a blood flow inhibition index representing a degree of inhibition of a blood flow in a blood vessel regarding the first region or the second region.

Medical image diagnostic apparatus, medical image processing apparatus, and medical image processing method

According to one embodiment, a medical image processing apparatus includes an image acquisition part and a data processing part. The image acquisition part is configured to obtain X-ray image data of an object including not less than three phantoms whose X-ray absorption factors are different from each other. The data processing part is configured to generate corrected X-ray image data of the object by correcting the obtained X-ray image data or other X-ray image data. The obtained X-ray image data or the other X-ray image data are corrected using a nonlinear function obtained based on pixel values of the obtained X-ray image data. The pixel values correspond to the phantoms.

Medical image processing apparatus, x-ray diagnostic apparatus, phantom, and medical image processing method

An image processing apparatus includes a storage unit which stores data of X-ray projection images generated through a angiographic imaging sequence, a generation unit which, based on the data, generates a reference time density curve concerning a reference region which is set as a blood supply region, and time density curves concerning perfusion regions which are set as a blood supplied region, a measurement unit which measures delay times for which a contrast medium reaches the perfusion regions from the reference region, from relationships between the reference time density curve and the time density curves, a calculation unit which calculates, respectively for the perfusion regions, first indices expressing correlations of the time density curves to the reference time density curve within a period determined on the basis of the delay times, and a first image generation unit which generates a first image expressing spatial distribution of the first indices.

Image processing apparatus and X-ray diagnostic apparatus

An image processing apparatus according to an embodiment includes an acquiring unit, a correcting unit, and a perfusion image creating unit. The acquiring unit obtains a pixel value of a myocardium tissue and an arterial blood before a contrast agent injected in a second contrast examination arrives at a cardiac of a subject when myocardium perfusion data is created, by performing the second contrast examination that captures a second medical image group including the cardiac of the subject who is given an injection of a contrast agent again after a first contrast examination that captures a first medical image group. The correcting unit corrects contrast agent concentrations of an arterial blood and a myocardium tissue in the second medical image group using acquired each pixel value. The perfusion image creating unit computes the myocardium perfusion data in the second contrast examination based on the corrected contrast agent concentrations.

Image processing apparatus and image processing method

An image processing apparatus according to the present embodiment includes a correcting unit. The correcting unit identifies, based on an observation value of a residual contrast material component that is injected to a subject before a predetermined timing and remains in the subject, the residual contrast material component and a new contrast material component that is newly injected to the subject after the predetermined timing regarding a contrast material component that is included in an image, and corrects an observation value of the contrast material component included in the image.

Image processing apparatus and X-ray diagnosis apparatus

An X-ray perfusion-image creating unit creates an X-ray perfusion image indicating blood flow dynamics in a certain organ from an X-ray projection image of a subject given with a contrast agent. An image correction unit extracts thickness information indicating the thickness of a myocardium from a three-dimensional image taken by an X-ray Computed Tomography (CT) apparatus. Moreover, the image correction unit creates a corrected perfusion image in which the thickness of the myocardium in the X-ray perfusion image is corrected, based on the thickness information. A display unit then displays the corrected perfusion image.

Image display apparatus and X-ray diagnosis apparatus

A computed tomography system has a support stage constructed and arranged to support a subject while under observation, an x-ray illumination system arranged proximate the support stage to illuminate the subject with x-rays, an x-ray detection system arranged proximate the support stage to detect x-rays after they pass through the subject and to provide signals based on the detected x-rays, and a data processing system in communication with the x-ray detection system to receive the signals from the x-ray detection system. The computed tomography system has a dynamic mode of operation and a scanning mode of operation. The data processing system extracts information concerning a dynamic process of the subject based on signals from both the dynamic mode and the scanning mode of operation.

Combined multi-detector CT angiography and CT myocardial perfusion imaging for the diagnosis of coronary artery disease

An apparatus includes a transformation table acquiring unit, a blood-flow information acquisition unit and a blood-flow image generating unit. The transformation table acquiring unit obtains a transformation table for transforming unspecified information representing a concentration of a contrast medium in a myocardium into an unspecified blood flow value image based on a CT image acquired in a concentration transition period. The blood-flow information acquisition unit obtains information representing the concentration of the contrast medium based on a CT image acquired during a constant concentration period. The blood-flow image generating unit generates a blood flow value image based on the information representing the concentration of the contrast medium according to the transformation table.

X-ray CT apparatus and myocardial perfusion image generating system

An X-ray CT apparatus has an image generating unit and a blood flow information acquiring unit. The image generating unit acquires projection data at rest and at non-rest from a myocardial part of an object into which contrast medium is injected continuously in a state in which each concentration of the contrast medium can be considered to be constant and reconstructs contrast CT image data at the rest and at the non-rest using the acquired projection data. The blood flow information acquiring unit obtains third blood flow information based in first blood flow information derived from the contrast CT image data at the rest and second blood flow information derived from the contrast CT image data at the non-rest.

X-ray CT apparatus, myocardial perfusion information generating system, X-ray diagnostic method and myocardial perfusion information generating method

An X-ray CT apparatus comprises a blood-flow information acquisition unit, a correction value calculating unit and a blood-flow image generating unit. The blood-flow information acquisition unit obtains information of a relative blood flow rate in the myocardium of the subject based on the CT image. The correction value calculating unit obtains a correction value based on the CT image in a concentration transition period defined to be a period from immediately after start of a continuous injection of a contrast medium into the subject until the contrast medium reaching the myocardium increases and is be in a state where it can be considered that the contrast medium is saturated at a constant value. The blood-flow image generating unit generates a blood flow value image in the myocardium by correcting the information of the relative blood flow rate with the correction value.

An X-ray CT apparatusfor radiating X-ray to a subject P so as to scan the subject P and reconstructing a image within the subject P based on an obtained projection data comprises an image generating unit and a blood-flow image generating unit. The image generating unit generates the image based on the projection data in a state in which a concentration of a contrast medium in a myocardial portion of a subject P continuously injected the contrast medium can be considered to be constant. The blood-flow image generating unitgenerates a blood flow image by removing components of a myocardial tissue from a portion of a myocardial region of the image generated by the image generating unit.

An image processing apparatus includes a storage unit which stores the data of a plurality of images in an angiography sequence, and a computation unit which generates a reference time density curve concerning a reference region set in a blood supply region to a blood supplied region and a plurality of time density curves concerning a plurality of local regions set in the blood supplied region on the basis of the data of a plurality of images, and computes a plurality of indexes respectively representing the correlations of the plurality of time density curves with respect to the reference time density curve.

X-ray diagnostic apparatus and image processing apparatus

The picture archiving and communication system (PACS) substantially optimizes a post-scanning command process in accordance with a user-specified priority for further processing a selected set of imaging data that has been collected by medical imaging devices such as a CT scanner and a MRI scanner and stored in distributed storage units on the network. The user-specified priority includes the least response time, the least costs and the least network traffic. The user-specified priority is optionally fixed in some preferred embodiments.

Growing community of inventors

Nagoya, Japan

Takashi Ichihara