Rigaku Corporation

Minoru Maesawa

Yukihiro Hara

Takafumi Koike

To make a user easily obtain an objective and stable analysis result of bone mineral density. An analyzerof bone mineral density using CT image data of a phantom having a known bone mineral density includes: a known data storage partthat stores known data of bone mineral density for a phantom; a histogram production partthat produces a histogram of region number relative to a CT value for three-dimensional CT image data of the phantom; a correspondence determination partthat determines correspondence between a CT value and a bone mineral density by correlating CT values showing respective peaks of the produced histogram with the known data of the phantom; and an analysis partthat decides a bone mineral density for three-dimensional CT image data of a subject using the determined correspondence.

Analyzer, analysis method and analysis program of bone mineral density

There are provided an image processing apparatus, an image processing method and an image processing program which can easily and accurately specify and analyze an abnormal part of a subject. An image processing apparatusused to specify the abnormal part of the subject includes a calculation unitcalculating position adjustment data between contour data of a specific subject extracted from an X-ray radiographic image and contour data of a photographic image obtained by photographing the specific subject, a sectional image generation unitgenerating a sectional image of a three-dimensional X-ray CT image correlated with the X-ray radiographic image on a plane parallel with a light receiving face of a two-dimensional biolight image correlated with the photographic image, and a display processing unitdisplaying the three-dimensional X-ray CT image and the two-dimensional biolight image in superposition on the sectional image, using the calculated position adjustment data.

Image processing apparatus, image processing method and image processing program

Provided are a CT-image processing apparatus and a method which can remove noise caused by one of a heartbeat and a breathing beat and extract only an accurate periodic motion by the other one. A CT-image processing apparatusthat processes projection data in which an animal is captured as a subject at each time by an X-ray CT apparatus includes a breathing beat threshold specification unitto specify a lower limit of a breathing beat frequency from a feature amount waveform within a ROI for breathing beat synchronization in a series of projection data, a heartbeat threshold specification unitto specify a lower limit of a heartbeat frequency from a feature amount waveform within a ROI for heartbeat synchronization in the series of projection data, a breathing beat extraction unitto extract a breathing beat waveform using a band-pass filter defined by the lower limit of the breathing beat frequency and the lower limit of the heartbeat frequency.

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Musashimurayama, Japan

Minoru Maesawa