JP2018068578A5

JP2018068578A5 -

Info

Publication number: JP2018068578A5
Application number: JP2016211068A
Authority: JP
Filing date: 2016-10-27
Publication date: 2019-11-07
Anticipated expiration: 2036-10-27

Description

（１）測定光と参照光との光干渉を利用して被検体の断層画像を得るＯＣＴ装置であって、前記被検体に対して前記測定光を走査させる走査手段と、前記走査手段を制御し、走査経路に沿って前記測定光を走査させる走査サイクルを同じ位置で複数回繰り返させるたびに、撮影範囲内で前記走査経路の位置を変更する制御手段と、を備え、前記制御手段は、変更前後の前記走査経路が少なくとも１点で重なるように前記走査経路の位置を変更することを特徴とする。
（２）測定光と参照光との光干渉を利用して被検体の断層画像を得るＯＣＴ装置において実行されるＯＣＴ制御プログラムであって、プロセッサによって実行されることで、前記被検体に対して前記測定光を走査させる走査手段を制御し、同じ走査経路に沿って前記測定光を複数回走査させる走査ステップと、前記走査ステップが繰り返されるたびに、変更前後で前記走査経路が少なくとも１点で重なるように前記走査経路の位置を変更する走査位置変更ステップと、を前記ＯＣＴ装置に実行させることを特徴とする。 (1) An OCT apparatus that obtains a tomographic image of a subject using optical interference between measurement light and reference light, the scanning means for scanning the measurement light with respect to the subject, and controlling the scanning means And a control means for changing the position of the scanning path within the imaging range each time a scanning cycle for scanning the measurement light along the scanning path is repeated a plurality of times at the same position, and the control means comprises: The position of the scanning path is changed so that the scanning paths before and after the change overlap at least one point.
(2) An OCT control program that is executed in an OCT apparatus that obtains a tomographic image of a subject using optical interference between measurement light and reference light. A scanning step for controlling the scanning means for scanning the measurement light and scanning the measurement light a plurality of times along the same scanning path, and each time the scanning step is repeated, the scanning path is at least one point before and after the change. And a scanning position changing step of changing the position of the scanning path so as to overlap with each other.

Claims

An OCT apparatus that obtains a tomographic image of a subject using optical interference between measurement light and reference light,
Scanning means for scanning the measurement light with respect to the subject;
Control means for controlling the scanning means and changing the position of the scanning path within the imaging range each time a scanning cycle for scanning the measuring light along the scanning path is repeated a plurality of times at the same position, and
The OCT apparatus characterized in that the control means changes the position of the scanning path so that the scanning paths before and after the change overlap at least one point.

The OCT apparatus according to claim 1, further comprising a calculation unit that obtains motion contrast based on a plurality of temporally different OCT data obtained by repeating the scanning cycle a plurality of times at the same position.

The OCT apparatus according to claim 2, wherein the calculation unit estimates the movement of the subject by analyzing overlapping OCT data acquired in an overlapping portion where the scanning paths overlap.

The OCT apparatus according to claim 3, wherein the calculation unit edits OCT data based on the estimated movement of the subject.

The OCT apparatus according to claim 3, wherein the control unit changes the position of the scanning path based on the estimated movement of the subject.

An OCT control program that is executed in an OCT apparatus that obtains a tomographic image of a subject using optical interference between measurement light and reference light, and is executed by a processor,
A scanning step of controlling scanning means for scanning the subject with the measurement light, and scanning the measurement light a plurality of times along the same scanning path;
A scanning position changing step for changing the position of the scanning path so that the scanning path overlaps at least one point before and after the change each time the scanning step is repeated;
Is executed by the OCT apparatus.