X-RAY FLUOROSCOPIC METHOD AND X-RAY FLUOROSCOPIC APPARATUS

To provide an X-ray fluoroscopic method and X-ray fluoroscopic apparatus which can correctly recognize the position of an end edge of a linear marker.SOLUTION: An X-ray fluoroscopic method that uses two X-ray imaging systems including X-ray irradiation units and X-ray detection units and specifies t...

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Bibliographic Details
Main Author YAMANAKA SEIJI
Format Patent
LanguageEnglish
Japanese
Published 27.05.2021
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Summary:To provide an X-ray fluoroscopic method and X-ray fluoroscopic apparatus which can correctly recognize the position of an end edge of a linear marker.SOLUTION: An X-ray fluoroscopic method that uses two X-ray imaging systems including X-ray irradiation units and X-ray detection units and specifies the position of an end edge of a linear marker by collecting from different two directions the X-ray image including the marker detained in the body of a subject to detect the position of the marker that moves following the body motion of the subject comprises: a determination step of determining whether or not the position of one end edge of the marker on a pair of projection surfaces matches epipolar restriction when setting epipolar geometry with the focal point of each X-ray irradiation unit as the projection center of a camera, and an image detected by each X-ray detection unit viewed from the focal point of each X-ray irradiation unit as the projection surface of the camera; and a change step of changing the position of the other end edge of the marker on one projection surface to the position of the one end edge when the position of the one end edge of the marker on the pair of projection surfaces does not match the epipolar restriction.SELECTED DRAWING: Figure 8 【課題】 線状のマーカの端縁の位置を正確に認識することが可能なX線透視方法およびX線透視装置を提供する。【解決手段】 X線照射部とX線検出部からなる2個のX線撮影系を使用し、被検者の体内に留置された線状のマーカを含むX線画像を異なる2方向から収集してマーカの端縁の位置を特定することにより、被検者の体動に伴って移動するマーカの位置を検出するX線透視方法であって、各X線照射部の焦点をカメラの投影中心とし、各X線照射部の焦点から見た各X線検出部により検出される像をカメラの投影面としたエピポーラ幾何を設定したときに、一対の投影面におけるマーカの一方の端縁の位置がエピポーラ制約に合致するか否かを判定する判定工程と、一対の投影面におけるマーカの一方の端縁の位置がエピポーラ制約に合致しない場合には、一方の投影面におけるマーカの他方の端縁の位置を一方の端縁の位置に変更する変更工程とを含む。【選択図】 図8
Bibliography:Application Number: JP20190210146