Hitachi Medical Corporation

Hitachi, Ltd.

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Kayaba Kogyo Kabushiki Kaisha

Hiroshi Takagi

Yoshihiro Goto

Hisashi Kobayashi

Minoru Yoshida

Hiroyuki Takeuchi

Kazuhiro Sato

Hiromichi Yamada

Hideki Kohno

Shigekazu Nozawa

Hiroaki Kuno

Isao Horiba

Masayuki Urashin

Tsutomu Suzuki

Takaaki Kobiki

Kenji Hatano

Shinichi Hagidaira

Yoko Uchida

Kouichi Koike

Nobuhiko Matsui

Takashi Tsukizu

Mitsuhiko Miyagawa

Yasuo Kuwabara

Dai Shinohara

Masao Ooi

Satoshi Yasunaga

Shigeru Satou

Yoshikazu Okudo

A medical image display method of this invention includes an organ display step for displaying an image of a predetermined organ including a desired blood vessel in a medical image on a display unit; a blood vessel selection step for selecting the desired blood vessel from the image of the predetermined organ displayed by the organ display step and designating a specific position of the desired blood vessel; and an image display step for displaying a pseudo image in a pseudo imaging mode as if a contrast, agent were made to flow through the blood vessel selected in the blood vessel selection step. The pseudo image of the flow of the contrast agent in the blood vessel assists doctor in conducting diagnoses and therapies.

Medical image display method and apparatus

In an image display apparatus capable of storing therein a small amount of images and also capable of displaying two sorts, or more of images within a short time period, an axial image, a sagittal image, and a coronal image, which are loaded from a magnetic disk, are displayed on a CRT monitor. Image position indication FIGS.are indicated above the respective tomographic images, and positions of the respective tomographic images are indicated on the respective image position indication FIGS.by employing heavy lines, and triangular symbols. The positions of the tomographic images can be adjusted by dragging the respective triangular symbolsby using a mouse. Image position input FIGS.are indicated under the respective tomographic images, and the positions of the respective displayed tomographic images are indicated on the image position input FIGS.by way of drag bars. Alternatively, the positions of the tomographic images may be adjusted by dragging the drag barsby using the mouse

Image display

An X-ray computerized tomography (CT) apparatus including a cyclic movement detector to detect a cyclic movement of at least a part of a living body to be examined, and producing an output signal representing the cyclic movement, a rotational member support an X-ray source and an X-ray detector, and rotating around the living body, a driving mechanism to drive a rotation of the rotational member, and a control unit to control a rotational speed of the rotational member in accordance with the output signal indicative of the cyclic movement from the cyclic movement detector, so that the X-ray detector collects total scan data for reconstructing a single slice starting at a predetermined phase of a signal cycle of the cyclic movement of the part of the living body, and not ending until immediately before a corresponding phase of a next cycle of the cyclic movement.

X-ray computerized tomography apparatus, control method therefor and image generating method using the apparatus

A radiography apparatus is constituted by an image pickup unit including an X-ray source for irradiating cone shaped X-ray beams to a patient under examination and an image receptor disposed opposite the x-ray source for receiving x-ray image data of the patient by the irradiated cone shaped x-ray beam; a cylindrical ring which carries the image pickup unit, defines a sufficient space to receive the patient therein so as to permit relative positional change of the patient with respect to the image pickup unit and is supported so as to permit rotation around its center axis; a second arm, an image pickup unit; a first video image processing unit; a second video image processing unit; and a change-over device which changes-over the x-ray image data obtained from the image pickup unit either to the first video image processing unit or to the second video image processing unit, whereby a three-dimensional x-ray image of the patient is obtained depending on necessity during an IVR while temporarily resting or interrupting the IVR.

Radiography apparatus with rotatably supported cylindrical ring carrying image pickup unit

An X-ray computerized tomography apparatus which includes: an X-ray generating source for irradiating an object with X-rays; a unit for detecting X-rays transmitted through the object; a scan unit for controlling direction of irradiation with X-rays so that a periphery of the object is scanned in a predetermined direction with the X-rays from the X-ray generating source; and a control unit for controlling a scan speed of the scan unit on the basis of an external signal synchronized with movement of a part or whole of the object. An X-ray computerized tomography apparatus which includes: a rotary member on which an X-ray source and an X-ray detector are disposed so as to be opposite to each other with respect to a center of rotation of the rotary member; an opening portion provided so that an object can be arranged on the center of rotation of the rotary member; a scan control section for controlling drive of the X-ray source and the rotary member so that the rotary member rotates to thereby perform scan on the periphery of the object with the X-rays in a direction of a sliced face crossing a body axis of the object; an image reconstituting section for generating a slice image signal of the object on the basis of an output signal of the X-ray detector obtained during the scan; a display unit for displaying a slice image of the object on the basis of the slice image signal; and a scan speed control section for receiving an electrocardiogram signal of the object to thereby control a rotational speed of the rotary member on the basis of the electrocardiogram signal. An image generating method by using an X-ray computerized tomography apparatus, which includes the steps of: scanning an object with X-rays along a sliced face crossing a body axis of the object while an irradiation source of the X-rays is rotated around the object; changing relative positions of the object and the irradiating source along the direction of the body axis and repeating the step of scanning the object with the X-rays every time the relative positions are changed; receiving an electrocardiogram signal of the object and controlling a scan speed of the X-rays synchronously with a period of the electrocardiogram signal; detecting the X-rays transmitted through the object every time the scan is performed to thereby collect image information with respect to a sliced face of the object; and generating three-dimensional image information of the object on the basis of image information collected by scan on a plurality of different sliced faces.

X-ray computerized tomography apparatus control method therefor and image generating method using the apparatus

Vehicle load responsive power steering system

When CT imaging is effected by spiral scanning, an operator is required to set only one or two of three imaging conditions to be set, that is, a bed moving speed, a slice width of irradiation X-ray beams and an image reconstruction pitch. The CT apparatus according to the present invention determines in advance the relationship between these three imaging conditions so that when one or two of these imaging conditions are inputted, the remaining imaging condition or conditions are specified in the light of this relationship.

Spiral scanning type x-ray CT apparatus

A three-dimensional image display method for displaying a three-dimensional image including depth and distance information which consists of the steps of obtaining a densified three-dimensional image according to the distance information of an original three-dimensional image using a voxel method and modifying the densified three-dimensional image using a surface method. The surface method consists of the steps of determining each minute image element group including plural image elements proximate to each other over all image elements forming the densified three-dimensional image obtained under the voxel method, computing a density gradient defined by the each minute image element group based on density data of the plural image elements, substituting each modified density data modified according to the density gradient for the density data of the plural image elements obtained under voxel method, and displaying the modified density data on a display. A system for accomplishing this method is also provided.

Imaging system including means to provide a display image with shadows

In an X-ray tomograph having an X-ray source and a multi-channel detector rotatable around a body under examination, circuitry for compensating for changes in the characteristics of the X-ray source or the channels of the detector by extracting from the X-ray transmission data at least one sensitivity correction component and using this component to correct the transmission data and thus effect the desired compensation.

System for computing correction factors for sensitivity differences in

A multielement scintillation radiation detector comprises a scintillator and a photosensitive detector, wherein to optically isolate between the adjacent radiation detectors, a thin light reflecting sheet on which a sponge material is attached is used to closely adhere to radiation shielding plates for partitioning each radiation detector.

Radiation detecting apparatus

About 1 to about 25% by weight of a liquid refrigerant is mixed into a refrigerant gas to be introduced into a screw compressor by suction on the basis of the refrigerant gas in a refrigerator comprising a screw compressor, a condenser, and an expansion valve and an evaporator connected to one another in series. A cooling effect as well as a sealing effect can be satisfactorily attained thereby.

Refrigerator

An apparatus for axial transverse tomography using piercing radiation such as X-ray and .gamma.-ray for displaying a tomographic image concerning variation of radiation absorption values at a given section of a subject under examination, comprising: a scanner effecting a revolution-scanning around said subject at uniform angles while maintaining constant relative positions of a radiation source and a radiation detector with said subject intervening therebetween; an input device for setting a region of interest for being enlarged based on parameters of central angle, inter-center distance and radius ratio, to locally enlarge said tomographic image; co-ordinate system transforming circuitry for carrying out, on information within said region of interest outputted from radiation detector, a transformation of co-ordinate system corresponding to enlarged co-ordinates, from information obtained by the scanner and outputted by the radiation detector and also from the set parameters; and convolution circuitry for carrying out a convolution operation on the resulting information representing the trnsformation of co-ordinate system.

Growing community of inventors

Chiba, Japan

Hiroshi Takagi