DETECTION DEVICE, PROGRAM, AND DETECTION METHOD

To provide a device, a program, or a method capable of more accurately detecting the position of a crystal lens equator part.SOLUTION: A tomographic image of an eye to be examined is acquired (S1), and a crystal lens front face, a crystal lens rear face, etc. displayed on the radiographic image are...

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Bibliographic Details
Main Authors ICHIKAWA KAZUO, ICHIKAWA KEI, MAJIMA KIYOYUKI
Format Patent
LanguageEnglish
Japanese
Published 15.04.2021
Subjects
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
MEDICAL OR VETERINARY SCIENCE
SURGERY
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Summary:To provide a device, a program, or a method capable of more accurately detecting the position of a crystal lens equator part.SOLUTION: A tomographic image of an eye to be examined is acquired (S1), and a crystal lens front face, a crystal lens rear face, etc. displayed on the radiographic image are specified (S2-S4). A first temporary crystal lens having a shape of the crystal lens front face on the rear face as well is set (S5). A second temporary crystal lens having a shape of the crystal lens rear face on the front face as well is set (S6). A third temporary crystal lens determined from a curve along the crystal lens front face and a curve along the crystal lens rear face is set (S7). Equator parts of the first to third temporary crystal lenses are specified (S8-S10). A center-of-gravity point of a triangle with each equator part as an apex is detected (S11). A straight line connecting the right and left centers-of-gravity is set as a straight line between the centers-of-gravity (S12). An intersection point of a perpendicular line drawn from the equator part of the third temporary crystal lens down to the straight line between the centers-of-gravity is detected (S13). A fourth temporary crystal lens with the center-of-gravity or the intersection point detected in Steps S11 and S13 as an equator part is set (S14). The fourth temporary crystal lens is displayed in a display part (S15).SELECTED DRAWING: Figure 3 【課題】水晶体赤道部の位置をより正確に検出できる装置、プログラム又は方法を提供する。【解決手段】被検眼の断層画像を取得し（Ｓ１）、断層画像上に表された水晶体前面及び後面等を特定する（Ｓ２〜Ｓ４）。水晶体前面の形状を後面にも有した第１仮水晶体を設定する（Ｓ５）。水晶体後面の形状を前面にも有した第２仮水晶体を設定する（Ｓ６）。水晶体前面に沿う曲線と水晶体後面に沿う曲線とから定まる第３仮水晶体を設定する（Ｓ７）。第１〜第３仮水晶体の赤道部を特定する（Ｓ８〜Ｓ１０）。各赤道部を頂点とした三角形の重心点を検出する（Ｓ１１）。左右の重心点間を結ぶ直線を重心点間直線として設定する（Ｓ１２）。第３仮水晶体の赤道部から重心点間直線に降ろした垂線の交点を検出する（Ｓ１３）。ステップＳ１１、１３で検出した重心点又は交点を赤道部とした第４仮水晶体を設定する（Ｓ１４）。第４仮水晶体を表示部に表示させる（Ｓ１５）。【選択図】図３
Bibliography:Application Number: JP20190183039