Hitachi, Ltd.

Hitachi Medical Corporation

Hitachi Metals, Ltd.

Hitachi Maxell, Limited

Kinsei Kogyo Co., Ltd.

Tetsuo Nakazawa

Osamu Miyazaki

Ken Takahashi

Takashi Shirahata

Takashi Naito

Hiroki Yamamoto

Hiroto Kokubun

Yoshihiro Goto

Fumiyoshi Kirino

Tadahiko Miyoshi

Takashi Namekawa

Tomoji Oishi

Ryota Kohara

Motoyasu Terao

Toshimichi Shintani

Sumio Hosaka

Eiji Koyama

Hideaki Fujii

Shigeru Tanaka

Takayuki Kadomura

Junji Sakai

Tatsumi Hirano

Shinichi Migita

Syogo Morimoto

Sachiko Okuzaki

Takatoshi Tanigawa

Mitsuo Usami

Nobuyuki Inaba

Taiga Goto

Teruaki Takeuchi

Satoshi Matsunuma

Hirokazu Inoue

Yasutaka Suzuki

Shigeru Kikuchi

Mitsutoshi Honda

Yuzo Kozono

Akira Yano

Hiroichi Shinohara

Seiji Okazaki

Nobuyoshi Hosaka

Nobutaka Abe

Tetsuo Oyama

Kuniyoshi Nakashima

Yoshihiro Ozawa

Shino Tanaka

Osamu Nishida

Masa Yamamoto

Masaki Fukuoka

Tomonori Yoshioka

Ryoji Takahashi

Naoko Ajiki

Tetsushi Honda

Yoshitaka Gotoh

Shin-ichi Itoh

Sakari Yaegashi

Tadao Nango

Masahiko Hatazi

In a case where helical scanning, etc., is performed in an X-ray CT apparatus, upsampled projection data that more approximates to an observed value is obtained. There is provided an X-ray CT apparatus that improves spatial resolution of an overall effective field of view without reducing rotation speed, in an FFS method of acquiring projection data through moving of an X-ray focus position to a plurality of positions. The X-ray CT apparatus: converts projection data acquired through helical scanning into projection data of normal scanning performed by one rotation; generates a virtual-counter-data space in which virtual counter data are acquired on substantially coincident X-ray transmission path in the converted projection data; performs upsampling in a view direction; and similarly upsamples FFS projection data in the view direction for focus-shifted projection data obtained by performing the helical scanning while causing the X-ray focus position to shift (virtual counter data space generation).

X-ray CT apparatus, upsampling method of projection data, and image reconstruction method

In an FFS method that improves spatial resolution by moving an X-ray focal spot to multiple positions to acquire projection data, in order to provide an X-ray CT apparatus and an image reconstruction method that enables to improve spatial resolution of the entire effective field of view without reducing a rotational speed, the X-ray focal spot in the X-ray tube deviceis shifted to acquire focal shift projection data (FFS projection data), the virtual view generation unitup-samples the FFS projection data (generates a virtual view) in the view direction, and the reconstruction computing unitreconstructs an image using actual data of the FFS projection data in the central regioncloser to the image center than a predetermined boundary and using the up-sampled projection data in the peripheral regionoutside the boundary in an image reconstruction computing process.

X-ray CT apparatus and image reconstruction method

To provide an X-ray CT apparatus and a scanning method that can scan a corpse efficiently, a death mode is selected and input to the CPU of an image processing device by performing a mouse-click or touch operation on any of buttons on a death mode selection window. The CPU obtains scanning conditions from the storage unit according to the input death mode. In a charred body mode, scanning conditions are defined in advance to perform high-resolution scanning for the pelvis portion and standard scanning for the other entire body for sex estimation. The sex estimation process estimates the corpse's sex based on the pelvis portion shape and outputs the results. In a drowned body mode, scanning conditions are defined in advance to perform high-resolution scanning for the lung field and standard scanning for the other entire body to measure a water amount in the lung.

X-ray CT apparatus and scanning method

Previously captured three-dimensional image data of a subject from which a reference image is extracted are provided in the form of time-series volume datacomposed of two-dimensional image data groups which are recorded over at least one period of a periodically moving organ of the subject, with time-phase information of a biological signal of the subject added thereto. Two-dimensional image data whose time-phase information is identical with the time-phase information of the biological signal of the subject at the time when an ultrasonic image is captured are extracted from the three-dimensional image data so as to provide the reference image.

Ultrasonic diagnosis arrangements for comparing same time phase images of a periodically moving target

The medical image display device is provided with a medical image reading unit configured to read a medical image obtained by a medical image diagnostic apparatus, a projected image creating unit configured to project the medical image onto a projection plane to created the projected image, and a projected image display unit configured to display the projected image, wherein the projected image creating unit has a virtual liquid generating unit configured to generate virtual liquid, the light transmittance of which is not zero and a virtual liquid adding unit configured to add the virtual liquid to the surface of an organ within the medical image, and creates a projected image of the medical image to which the virtual liquid has been added.

Medical image display device and medical image display method

In a medical image display device for displaying a hollow organ of an examinee as a panoramic image, an operator is enabled to easily determine whether display of an observation site on the panoramic image is correct or not. The medical image display device having panoramic image creating means configured to create a panoramic image of a hollow organ of an examinee and display means configured to display the panoramic image includes false image probability calculating means configured to calculate a false image probability of a position in the panoramic image in accordance with the position concerned, and control means configured to display the false image probability in association with the panoramic image. Furthermore, the medical image display device having panoramic image creating means configured to create a panoramic image of a hollow organ of an examinee and display means configured to display the panoramic image includes false image probability calculating means configured to calculate a false image probability of a position in the panoramic image in accordance with the position concerned, and control means configured to display the panoramic image on the basis of the false image probability.

Medical image display device and method of medical image display

Provided is a medical image processing device including: medical image information acquisition unit which acquires medical image information indicating a tomographic image of an object to be examined; evaluation region extraction unit which extracts an evaluation region for each of the tissues contained in the acquired medical image information according to a pixel value, a concentration value, or a luminance value for each of the tissues; and evaluation region display unit which displays the evaluation region on a display device.

Medical imaging processing device, medical image processing method, and program

There is provided a medical image processing device and a medical image processing method that can extract and display lesion candidate regions having different sizes and similarity forms at a time through a series of processing. Therefore, with respect to a first medical image, a first evaluation for the curved surface form of the first medical image is made to extract first lesion candidate regions. With respect to each of the first lesion candidate regions extracted by a first extracting unit, a second evaluation for the curved surface form thereof is made to extract a second lesion candidate region. The second lesion candidate region extracted by a second extracting unit is superimposed and displayed on a second medical image.

Medical image processing device and medical image processing method

An image diagnostic support device is configured to acquire a tomographic image including a lung region of an object to be examined and is provided with image display to display the tomographic image. The device is also configured to set up a measurement range, extract the chest wall from the image in the set measurement range, extract a thickened portion incidental to the chest wall in the measurement range, and measure the thickness of a thickened portion at each position in the measurement range.

Image diagnostic support apparatus

A method includes a periodic motion data input step Sof receiving input of periodic motion data indicating changes of the periodic motion with time in an object to be examined who is a target of image data collection, a step Sof estimating fluctuations in the time resolution of the image data with time based on the periodic motion data, designating an image collection range in the object, and adjusting the collection position of the image data such that the image data is collected in the image collection range at a suitable time of image data collection, the estimated time resolution being set in a predetermined suitable range, and an image data collection position control step Sof relatively moving at least a part of the image data collection range and the collection position of the image data such that the part of the range and the position are superimposed on each other within a time when the image data of the image data collection range has a time resolution within the desired range based on the image data collection conditions.

Method and system for collecting image data from image data collection range including periodically moving part

A nuclear medicine diagnosis apparatus comprising a mechanical collimator for effecting passage in a given direction of photons with given energy emitted from an object injected or dosed with a drug containing a radioactive isotope; a former-stage detector for detecting positional information at a point of reaction of photons having passed through the mechanical collimator and information on the momentum of charged particles generated by the reaction; a latter-stage detector disposed in the subsequent stage of the former-stage detector to detect information on the photons having been scattered by the former-stage detector; and image reconstruction means for reconstructing an image from detection information having been collected from the former-stage detector and latter-stage detector, wherein the image reconstruction means is built so that differentiation is carried out on the information on the photons having passed through the mechanical collimator and the information on the photons having been scattered by the former-stage detector and that the image reconstruction is carried out by different image reconstruction algorithms from the individual differentiated detection information.

Nuclear medicine diagnosis apparatus

A Compton camera device according to the invention includes first means for reading coordinate data of a scattering point of a quantum ray detected by a pre-stage detector for each Compton scattering event, second means for reading coordinate data of a reaching point of the Compton-scattered quantum ray detected by a post-stage detector for each Compton scattering event, and third means for calculating a measurement accuracy of the scattered quantum ray by the first and second means for each Compton scattering event, calculating a statistical quantity of the quantum ray for each calculated measurement accuracy, and outputting the calculated statistical quantity to image reconstruction means.

Compton camera device

An X-ray CT apparatus comprises: motion information acquisition means that acquires periodical motion information on a motion portion of an object to be examined; a detector that rotates together with an X-ray source and detects X-rays applied to the object from the X-ray source to acquire projection data per collection region; and reconstruction means that processes the projection data resulting from the detector to reconstruct a tomogram of the object, wherein the X-ray CT apparatus further includes delay time determination means that determines a delay time by adding a time width of the collection region and a processing delay time in the X-ray CT apparatus and a time interval from the moment when the phase of the measured periodical motion information is matched with the phase of the rotation period of the X-ray CT apparatus to the moment when they are matched next time, and collection means that correlates, with the periodical motion information obtained by the motion information acquisition means, and successively collects the projection data obtained from the detector, with the reconstruction means starting reconstruction of the tomogram after the delay time.

X-ray CT device

In an X-ray CT apparatus having a multi-slice detector, the retrospective ECG (Electrocardiography) gating imaging is applied to helical scans. Discontinuity of projection data generated in the scans is interpolated using data at a heartbeat time phase in 180-degree opposite relation to reduce motion artifacts. Further, projection data at an arbitrary slicing position and in at arbitrary heartbeat time phase are formed utilizing continuous divided projection data obtained above, and by properly combining or gathering them, a tomogram of whole heart, a three-dimensional image thereof, and further, a three-dimensional cardiac moving image in heartbeat time phases with an arbitrary time interval can be continuously and smoothly created.

Method of producing cardiac tomogram and tomograph using x-ray ct apparatus

The object of the present invention is to provide an optically functional element having a large change in refractive index with temperature change and a fast change rate in refractive index, a production method for the same and optical switch, temperature sensor and optical information recording medium using the same. The present invention provides a thin film formed directly on a substrate or via other layers, and the film is composed of particles with an average diameter of not larger than 13 nm, observed at film surface. The present invention also provides an optically functional element having an amount of change in refractive index of not less than 2.0&#xd7;10/&#xb0; C. The present invention further provides a production method for said thin film by sputtering under reduced pressure in an inert gas atmosphere containing 3-15% by volume of oxygen, and optical switch, temperature sensor and optical information recording medium using said element.

Optically functional element and production method and application therefor

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Tokyo, Japan

Tetsuo Nakazawa