公开(公告)号：JPH09133521A

公开(公告)日：1997-05-20

申请号：JP29132095

申请日：1995-11-09

Applicant: TOSHIBA CORP

Inventor： UYAMA KIICHIRO ,  FUJII MASAJI ,  TAMAKI KIYOHIDE ,  MIZUGUCHI HIROSHI ,  YOSHIDA MASAYA

IPC: G01B15/00

Abstract: PROBLEM TO BE SOLVED: To measure the internal dimensions of a specimen in a short time by receiving an X-ray fan beam passed through the specimen by means of an X-ray line sensor and then determining the internal structure of specimen at an image processing section based on the detected values. SOLUTION: X-rays radiated from an X-ray tube 51 is passed through a specimen collimator 53 (53a, 53b) to produce an X-ray fan beam 54. A specimen 55 is carried in the direction substantially orthogonal to the X-ray fan beam 54 by a carrying means 57. The X-ray fan beam 54 is received by an X-ray line sensor 56 which then produces a detection value of X-ray. An image processing section 59 determines the internal structure of specimen 55 based on the detection values from X-ray line sensor 56.

公开(公告)号：JPS63167248A

公开(公告)日：1988-07-11

申请号：JP31020186

申请日：1986-12-27

Applicant: TOSHIBA CORP

Inventor： YOSHIDA MASAYA ,  FUJII MASAJI

IPC: A61B6/03 ,  G01N23/04 ,  G06T1/00

Abstract: PURPOSE:To eliminate a part where radiation can not be detected by a separator by laminating plural detection parts where detecting elements and separators are arranged alternately, and arranging the detecting elements of the respective layers so that they shift in position. CONSTITUTION:A radiation beam from a radiation generator 11 is collimated by a slit 15 into a fan-shaped beam 14, which is projected on a sample 12. A radiation detector group 13 have detection parts 13a and 13b laminated. The detection part 13a has detecting elements 1 at positions obtained by dividing a fan angle alpha equally and separators 2 between them respectively, and the detection part 13b have an arrangement in the opposite relation from the detection part 13a. The quantity of radiation transmission is detected by respective detecting elements 1 of the detection part 13a by arrangement positions. While a turntable 16 is rotated by a specific angle, the sample is rotated by at least 180 deg.+alpha and data corresponding to respective angles are collected. Then the detector group 13 is lowered until the detection part 13b reaches the same plane with the fan-shaped beam and transmission data corresponding to the arrangement positions of the respective detecting elements of the detection part 13b, i.e. >=180 deg.+alpha are collected similarly.

公开(公告)号：JPH07104438A

公开(公告)日：1995-04-21

申请号：JP24706093

申请日：1993-10-01

Applicant: TOSHIBA CORP

Inventor： FUJII MASAJI ,  YOSHIDA MASAYA ,  UYAMA KIICHIRO

IPC: G01T7/00 ,  G03B42/02 ,  G03C5/00

Abstract: PURPOSE:To obtain a radioscopic image high in quality in a state where the object is fixed. CONSTITUTION:It is characterized in that the device includes a collimator means 23 which is provided in front of a detecting means 21, and is moved in a to- and-fro motion integrally with the detecting means 21 by ascanning means, and concurrently has an aperture 24 roughly identical in angle to an incident angle of radiation to the detecting means 21 at the maximum movement position, a connecting means which connects a radiation generating means 11 to a radiation detecting means 20 so as to hold them, and a signal processing means which collects the output signal of the detecting means 21, processes the output signal to make the picture, and thereby obtains a radioscopic image.

公开(公告)号：JPH07103743A

公开(公告)日：1995-04-18

申请号：JP24961893

申请日：1993-10-06

Applicant: TOSHIBA CORP

Inventor： YOSHIDA MASAYA

IPC: G01B15/00 ,  G01N23/04

Abstract: PURPOSE:To collect interesting signal components with high accuracy thereby to improve image quality by subtracting offset data from sensitivity data having unnecessary components mixed therein by a reference X-ray dose, and calculating pure sensitivity data. CONSTITUTION:An X-ray tube 101 is turned OFF, and an output, of an X-ray detector 103 when a sample to be inspected is not present is detected to be used as offset data. Then, the X-ray tube 101 is turned ON to measure sensitivity data under conditions of X-rays different, from when the sample is inspected. The measured sensitivity data include unnecessary components by the offset data and therefore, the unnecessary components are subtracted to form pure sensitivity data. Thereafter, a transfer device 108 is driven to move a to-be- inspected sample 107. X-ray beams 102 cast to the sample l07 and passing through the sample 107 are detected by tone detector 103. Data of the transmission of X rays are collected at a data-collecting device 104. The offset data are subtracted from the collected data at a processing device 105, which is divided by the pure sensitivity data, so that data of the actual transmission of X rays are calculated.

公开(公告)号：JPH0694648A

公开(公告)日：1994-04-08

申请号：JP24016492

申请日：1992-09-09

Applicant: TOSHIBA CORP

Inventor： YOSHIDA MASAYA

IPC: G01N23/00

Abstract: PURPOSE:To obtain a CT scanner improving picture quality. CONSTITUTION:A reference phantom with a transmittance of radiation which is nearly equal to that of a specimen 8 is used to create a reference data for compensating the difference in sensitivity characteristics of each detection channel in a radiation detector 4 according to the transmittance data obtained by shooting of the reference phantom and to compensate the transmittance data of the specimen with the reference data, thus reducing the influence due to fluctuation of sensitivity of each detection channel of the radiation detector 4 in the transmittance data of the specimen and obtaining a reconfigured image of improved quality.

公开(公告)号：JPH08220025A

公开(公告)日：1996-08-30

申请号：JP3084195

申请日：1995-02-20

Applicant: TOSHIBA CORP

Inventor： FUJII MASAJI ,  YOSHIDA MASAYA

IPC: G01N23/04

Abstract: PURPOSE: To eliminate the deterioration of image quality caused by the sensitivity spectrum of an X-ray line sensor (one-dimension type X-ray detecting means). CONSTITUTION: This X-ray inspecting apparatus, which interposes an object under inspection W between an X-ray generating means 1 and a one-dimensional type X-ray detecting means 3, relatively moves it, two-dimensionally scanning it, processes the output of the X-ray detecting means 3, and obtains the fluoroscopic image of the object under inspection comprises a data forming means 51 which samples the output of the X-ray inspection means 3 under the state that an X-ray filter 11 having the characteristics corresponding to the transmitting spectrum is arranged between the X-ray generating means 1 and the X-ray detecting means 3 in place of the object under inspection W and forms the correcting data for correcting the sensitivity spectrum of the X-ray detecting means 3 and a correction operating means 58 performing the correcting operation for the transmitted data of the object under inspection obtained from the output of the X-ray inspecting means 3 at the actual inspection based on the correcting data.

公开(公告)号：JPH07167800A

公开(公告)日：1995-07-04

申请号：JP31293793

申请日：1993-12-14

Applicant: TOSHIBA F A SYSTEM ENG ,  TOSHIBA CORP

Inventor： TSURU SHIYOUJI ,  SHINOHARA MASAHARU ,  NISHIDE AKIHIKO ,  YOSHIDA MASAYA

IPC: G01N23/04

Abstract: PURPOSE:To provide a tomographic image photographing device capable of setting photographing position and executing planned scan with such a simple operation as selecting proper one among tomographic images photographed in advance. CONSTITUTION:Constituted are a means 8 for containing and reserving each tomographic image already photographed and additional information, a tomographic image selection means 9 for selecting a plurality of tomographic images from already photographed images, a tomographic plan-producing means 8, 10 for extracting a position out of at least the image selected with the tomograph selection means 9 and the additional information and producing tomographic plan table, and a tomogram-taking means for automatically photographing a sample body based on the produced tomographic plan table.