X-RAY IMAGE PICKUP APPARATUS, X-RAY IMAGE PICKUP METHOD, AND X-RAY IMAGE PICKUP APPARATUS MONITORING METHOD

WIPO Patent Application WO/2015/064446

A1

The present invention estimates and corrects changes in X-ray radiation quality arising from small design tolerances, etc. for substances between the X-ray source and detection elements. As a result, reduction in the ability to distinguish substances by the dual energy imaging method is prevented. The X-ray image pickup apparatus (100) is provided with an inherent filtration-calculating unit (223) for calculating the deviation from a reference radiation quality as a transmission distance (inherent filtration) of a specific reference substance using measurement data for air (without a subject) taken at two or more different tube voltages. The inherent filtration-calculating unit calculates the reference substance transmission distance (inherent filtration) for each detection element by applying reference substance transmission distance conversion using the dual energy imaging method to the measured data. When imaging the subject, images in which changes in radiation quality have been corrected are obtained by performing dual energy imaging that takes the calculated inherent filtration for each detection element into account.

TSUBOTA YUSHI (JP)
WATANABE FUMITO (JP)
KONNO YASUTAKA (JP)
KOJIMA SHINICHI (JP)
YAMAKAWA KEISUKE (JP)
KUROKAWA SHINJI (JP)

PCT/JP2014/078099

May 07, 2015

October 22, 2014

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HITACHI MEDICAL CORP (JP)

A61B6/03; G01N23/04

JPH06296607A	1994-10-25
JP2004347328A	2004-12-09
JP2009112627A	2009-05-28

Sannozaka Patent Law Firm (JP)
Patent business corporation The Sanno hill patent firm (JP)

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