An X-ray CT apparatus is provided with an X-ray tube current modulation pattern calculation means that calculates an X-ray tube current modulation pattern based on a 3-dimensional model of an object calculated based on a scanogram image of the object, start-up shape acquisition means that acquires a start-up shape of CT values of a predetermined region of the object or CT value time differences after injecting contrast agent into the object, time contrast curve prediction means that predicts a time contrast curve indicative of a time sequential change of contrast in a diagnostic portion of the object at each slice position at a scan time based on the acquired start-up shape of the CT values or CT value time differences, object 3-dimensional model modification means that modifies a 3-dimensional model of the object based on the predicted time contrast curve, and X-ray tube electric current modulation pattern modification means that modifies the X-ray tube electric current modulation pattern based on the modified 3-dimensional model of the object.

X-ray CT apparatus

A data acquisition device, which has an X-ray detector including a plurality of channel widths at which channels at its central portion are fine and channels at its peripheral portions are coarse or rough, and a plurality of data acquisition ranges including a data acquisition range wide in a channel direction and a data acquisition range narrow in the channel direction, and which is capable of performing switching among the data acquisition ranges for each data acquisition, is used to perform data acquisition on the channels fine at the central portion in the data acquisition range narrow in the channel direction, whereby an X-ray CT apparatus is provided which is capable of performing high-resolution imaging and brings about more satisfactory image quality.

X-ray ct apparatus

An object rotating type cone beam radiation CT radiographing device in which a high speed and high sensitivity are obtained with low costs is provided. Thus, a radiation CT device of high performance for vehicle-mounted use and group medical examination can be provided at low costs. In the object rotating type cone beam radiation CT radiographing device, a rotational angle of an object is detected, a signal storage period of a batch-exposure type radiation image sensor panel is controlled on the basis of the rotational angle signal, and a signal storage period of a signal storage type reference signal generator is controlled. There is provided a radiation CT radiographing device in which the object can be photographed at arbitrary resolution during the photographing, a fluctuation of a radiation source during the photographing can be detected without using a special detector and corrected in accordance with its detection amount.

Radiation CT radiographing device, radiation CT radiographing system, and radiation CT radiographing method using the same

A reduced size CT scanner for baggage inspection has a wide angle x-ray source and multiple sets of detectors at different distances from the x-ray source. The detectors in each set are sized and positioned to maintain consistent pitch and flux levels among all detectors. Conventional reconstruction processes can be used to process the data from the CT scanner. The scanner may also be incorporated into a check-in desk in a network of scanners.

Folded array ct baggage scanner

An X-ray inspection device includes an X-ray detecting unit, a determining unit, and an output unit. The X-ray detecting unit is configured and arranged to detect a level of X-rays passing through an article. The determining unit is configured to determine a state of the article based on a detection level of the X-rays detected by the X-ray detecting unit using a plurality of thresholds including a first threshold and a second threshold for a single determination criterion. The output unit is configured and arranged to output a result of determination made by the determining unit.

X-ray inspection device

A radiation detector of this invention includes a scintillator for converting an X-ray incident from a surface side into light, at least one photodiode chip having a plurality of photodiodes for converting the converted light into electrical signals, at least one switching chip having a plurality of switching elements for reading out a plurality of signals from the plurality of photodiodes, and at least one data acquisition chip having a plurality of data acquisition systems for amplifying the plurality of readout signals and converting the signals into digital signals. The photodiode chip, the switching chip, and the data acquisition chip are commonly mounted on a rigid multilayer wiring board.

Radiation detector, radiation detecting system and X-ray CT apparatus

PROBLEM TO BE SOLVED: To provide a radiation detector, a radiation detecting system and an X-ray CT system in which the number of arrays can be increased. SOLUTION: The radiation detector has a scintillator 9 for converting incident X-rays from the surface side into light, a photodiode chip 2 having a photodiode 3 for converting the light thus converted into an electrical signal, a switching chip 4 having a transistor 5 for reading out a signal from the photodiode 3, and a data collecting chip 8 for amplifying and digitizing a signal thus read out, and the photodiode chip 2, the switching chip 4 and the data collecting chip 8 are mounted commonly on a rigid multilayer wiring board 30.

Radiation detector, radiation detecting system, x-ray ct system

PROBLEM TO BE SOLVED: To provide a radiation detector which can take a photograph of high resolution in a shorter photography time and a CT device which uses it. SOLUTION: At least photodiode arrays 4, 24, 34, and 44 or switching elements 8a to 8n, 28a to 28n, 38a to 38n, and 48a to 48n and wiring boards 7, 7a, 7b, and 7c or the photodiode arrays and switching elements are electrically connected through flexible substrates 9a to 9n, 39, or bumps 49a to 49n. COPYRIGHT: (C)2001,JPO

Radiation detector and x-ray ct device

PROBLEM TO BE SOLVED: To provide a two-dimensional detector for X-ray CT capable of executing image photographing highly precisely in a wide range per unit time. SOLUTION: This two-dimensional detector for X-ray CT is equipped with scintillators 407 arranged in array, for generating a light signal based on an incident X-ray, a photodiode group 406 connected respectively to the scintillators 407 arranged in array, for converting the light signal into an electric signal, a substrate 401 having the photodiode group 406 formed on its first main surface, switching elements 404 installed on the side of the photodiode group 406 on the substrate 401, for binding the electric signals, and data collection elements 405 arranged on the second main surface of the substrate 401 and connected to the switching elements 404. COPYRIGHT: (C)2001,JPO

Two-dimensional detector for x-ray ct

PROBLEM TO BE SOLVED: To provide a radiation detector, a radiation detection system, and an X-ray CT system, capable of increasing the number of columns SOLUTION: The radiation detection system comprises a scintillator for converting X-rays, incident from a surface side into light; at least one photodiode chip provided with a plurality of photodiodes for converting the converted light into electrical signals; at least one switching chip, provided with a plurality of switching elements for reading a plurality of signals from among a plurality of the photodiodes; at least one data acquisition chip provided with a plurality of digital data acquisition sections for amplifying a plurality of signals that have been read out for digitizing; and a rigid printed-wiring board for commonly mounting the photodiode chips, the switching chips, and the data acquisition chips COPYRIGHT: (C)2008,JPO&INPIT

Machiko Ono

Papers

Radiation detector, radiation detecting system and X-ray CT apparatus

Radiation detector, radiation detecting system, x-ray ct system

Radiation detector and x-ray ct device

Two-dimensional detector for x-ray ct

Radiation detector, radiation detection system, and x-ray computer tomography system