JP2021141969A - Endoscope device - Google Patents

Abstract

To provide a simplified endoscope device capable of properly preventing overlooking even a lesioned part on a rear side of a large intestine fold in large intestine endoscopic examination.SOLUTION: An endoscope device comprises: an image acquiring part 310 for acquiring an image acquired by imaging, an inside of a large intestine in a subject, by an insertion part 200 of an endoscope; a guide image generating part 320 for generating a guide image from the acquired image information; and a display part 400. The guide image generating part 320 comprises: an inside-of-large intestine detected position identifying part 325 for identifying a detected position in a large intestine model; and an association part 324 for associating positional information of the detected identified position with a part on the large intestine model.SELECTED DRAWING: Figure 2

Description

The present invention relates to an endoscopic device capable of avoiding oversight of a lesion site in colonoscopy.

Colonoscopy is so widespread that it is performed in many centers as part of a regular examination. In addition, efforts are being made to improve the accuracy of diagnosis and treatment by recognizing lesions in more detail through pigment spray observation and magnifying endoscopy. However, due to the characteristics of the anatomical structure, colonoscopy can cause observational blind spots. Since the ascending colon has deep half-moon folds and stool masses are likely to remain, the back side of the folds becomes an observational blind spot, and lesions may be overlooked.

The cecal reversal method has been proposed as a method for preventing oversight of lesions in colonoscopy. In this method, after normal observation, the up angle is maximized near the cecum, the ascending colon is looked up by a pushing operation, and the back side of the fold near the hepatic curve is observed from the cecum by a pulling operation (Non-Patent Document 1).

However, this inversion method in the cecum is a method that depends on the skill level of the operator, and it is required to prevent oversight of the lesion site in colonoscopy by a simpler method.

In Patent Document 1, for the purpose of preventing oversight of lesions in colonoscopy, it is possible to observe two directions at the same time with one endoscope, but the tip of the insertion part can be made small in diameter, and each observation. An endoscope device capable of displaying an image as a high-resolution image on a monitor is disclosed. Specifically, this endoscopic device is located in front of the operation unit, the flexible tube portion extending forward from the operation unit, and the flexible tube portion, and operates the bending operation means provided in the operation unit. A curved portion that curves according to the above, a connecting portion made of a hard material that connects the front end of the flexible tube portion and the rear end of the curved portion, and a tip rigid made of a hard material that extends forward from the front end of the curved portion. An insertion portion having a portion, a first observation optical system provided in a state of being exposed on the surface of the hard tip portion, and an observation image transmitted through the first observation optical system provided inside the hard tip portion. The first imaging element for imaging the image, the second observation optical system provided in a state of being exposed on the surface of the connection portion, and the observation image transmitted through the second observation optical system provided inside the connection portion. It includes a second imaging element for imaging.

Japanese Unexamined Patent Publication No. 2016-187578

Examination of Blind Spots in Colonoscopy-Usefulness of "Cecal Reversal Method" in Ascending Colon, Clinical Study, 2006 Vol. 69, No. 2, p.37-40

However, since the above-mentioned endoscopic device is complicated and there is an angle that becomes a blind spot in two-way observation, it is difficult to accurately prevent the lesion site from being overlooked.

The present invention has been made in view of such a problem, and it is intended to provide a simple endoscopic device capable of accurately preventing oversight even at a lesion site such as the back side of a large intestine fold in colonoscopy. The purpose.

The endoscope device according to the present invention acquires a guide image from an image acquisition unit that acquires an image of the inside of the large intestine in a subject by an insertion unit of the endoscope and image information acquired by the image acquisition unit. The guide image generation unit to be generated, an image captured by the insertion unit of the endoscope acquired by the image acquisition unit, and a display unit for displaying the guidance image generated by the guidance image generation unit are provided. The guide image generation unit is a large intestine position identification information acquisition unit that acquires the position information of the insertion portion of the endoscope in the large intestine when the image is captured, and a large intestine model that acquires the large intestine model in the subject. In the acquisition part and the large intestine model, the position on the large intestine model that specifies the position on the large intestine model corresponding to the position information in the acquired large intestine. It has a specific part and a corresponding part that associates the position information on the specified large intestine model on the large intestine model and the detected position information of the specified place on the large intestine model.

According to the present invention, it is possible to accurately prevent oversight even in a lesion site such as the back side of a large intestine fold in colonoscopy.

It is a figure explaining the outline of the image displayed on the display part of the endoscope apparatus which concerns on this invention. It is a figure explaining the outline of the endoscope apparatus which concerns on this invention. It is a figure explaining the outline of the guide image generation part of the endoscope apparatus which concerns on this invention. It is a figure explaining the outline of the position identification information acquisition part in the large intestine of the endoscope apparatus which concerns on this invention. It is a figure explaining the state which changes from the undetected place to the detected place when the insertion part of the endoscope apparatus which concerns on this invention moves. It is a figure explaining the outline of the position specifying part on the large intestine model of the endoscope apparatus which concerns on this invention.

Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings, but the embodiments are for facilitating understanding of the principles of the present invention, and the scope of the present invention is as follows. The present invention is not limited to the embodiment, and other embodiments in which those skilled in the art appropriately replace the configurations of the following embodiments are also included in the scope of the present invention.

As shown in FIG. 1, the display unit of the endoscope device of the present invention displays an image of the large intestine captured by the insertion unit of the endoscope device and a large intestine model image which is a model of the large intestine. .. On the large intestine model image, where the insertion part of the endoscope device is located in the large intestine is displayed. That is, the position of the insertion portion of the endoscope device on the large intestine model image coincides with the position of the insertion portion of the actual endoscope device in the large intestine. Further, on the large intestine model image, a place detected by the endoscopic device and a place not detected by the endoscope device are displayed.

As shown in FIG. 2, the endoscope device 900 of the present invention includes a light source unit 100, an insertion unit 200, an image processing unit 300, a display unit 400, and an external interface unit 500. The light source unit 100 includes a white light source that generates white light. The insertion portion 200 is elongated and bendable to allow insertion into the large intestine.

The insertion unit 200 includes a fiber 210 for guiding the light of the light source unit 100, an illumination lens 220 for irradiating the observation target with the light guided to the tip by the fiber 210, and an objective for collecting the reflected light returning from the observation target. Includes lens 230 and.

The external interface unit 500 includes a power switch, a button for starting a shooting operation, and the like. The external interface unit 500 outputs the input information to the control unit 350.

The image acquired by the image acquisition unit 310 is output to the display unit 400. The image acquired by the image acquisition unit 310 is output to the guide image generation unit 320. The guide image generation unit 320 generates a guide image and outputs it to the image display unit 400.

As shown in FIG. 3, the guide image generation unit 320 has the large intestine position identification information acquisition unit 321 and the large intestine model acquisition unit 323, the large intestine model upper position identification unit 322, the corresponding unit 324, and the large intestine detection completed. Includes the positioning unit 325 and.

The image signal from the image acquisition unit 310 is output to the large intestine internal position identification information acquisition unit 321 and the large intestine model upper position identification unit 322. The position identification information acquisition unit 321 in the large intestine is connected to the position identification unit 322 on the large intestine model. The position identification information acquisition unit 321 in the large intestine is connected to the detected position identification unit 325 in the large intestine. The detected positioning unit 325 in the large intestine is connected to the corresponding unit 324. The large intestine model acquisition unit 323 is connected to the large intestine model upper position specifying unit 322 and the corresponding unit 324.

The corresponding unit 324 is connected to the display unit 400. Further, the control unit 350 is bidirectionally connected to the large intestine internal position identification information acquisition unit 321 and the large intestine model upper position identification unit 322, the large intestine model acquisition unit 323, and the corresponding unit 324, and controls these. do.

Based on the control of the control unit 350, the large intestine position identification information acquisition unit 321 identifies the position of the insertion part of the endoscope device in the large intestine when the image is captured, and the insertion part of the endoscope device As information for specifying the position to be detected, the moving distance and the moving direction of the insertion portion of the endoscope device in the large intestine are acquired.

As shown in FIG. 4, the position identification information acquisition unit 321 in the large intestine includes an image storage unit 321a, a distance calculation unit 321c, and a direction calculation unit 321b.

The image storage unit 321a stores the image output from the image acquisition unit 310 under the control of the control unit 350. When the image is input to the image storage unit 321a, the image one frame before stored in the image storage unit 321a is output to the direction calculation unit 321b and the distance calculation unit 321c, respectively.

The distance calculation unit 321c calculates the moving distance of the insertion unit of the endoscope device in the large intestine based on the acquired image based on the control of the control unit 350. Similar figures are extracted from the feature points of the image acquired by the image acquisition unit 310 and the feature points of the image acquired one frame before the image stored in the image storage unit 321a. From the relationship between the magnification of the similar shape and the moving distance, the moving distance L in the large intestine of the insertion portion of the endoscope device is calculated. The calculated movement distance L is output to the position identification unit 322 on the large intestine model. Further, the calculated moving distance L is output to the detected position identification unit 325 in the large intestine.

The direction calculation unit 321b calculates the movement direction (h, v) in the large intestine from the measurement start point of the insertion unit of the endoscope device based on the acquired image based on the control of the control unit 350. .. The image acquired by the image acquisition unit 310 is compared with the image acquired one frame before the image stored in the image storage unit 321a, and the moving direction (h, v) is determined based on the comparison result. calculate. Note that h indicates the angle moved in the horizontal direction, and v indicates the angle moved in the vertical direction. The calculated movement direction (h, v) is output to the position identification unit 322 on the large intestine model. The calculated movement direction (h, v) is output to the detected position identification unit 325 in the large intestine.

As shown in FIG. 5A, in the case of the moving distance L1 and the moving direction (h1, v1), there are detected places and undetected places in the large intestine. After that, as shown in FIG. 5 (b), in the case of the moving distance L2 and the moving direction (h2, v2), the detected places in the large intestine increase.

Based on the control of the control unit 350, the response unit 324 associates the position information detected by the endoscope with the position on the large intestine model.

The large intestine model acquisition unit 323 acquires a large intestine model representing an overview of the large intestine in the subject under the control of the control unit 350. The large intestine model is a two-dimensional model that represents the large intestine of a healthy person. The large intestine model may be acquired from the subject himself / herself, or may be acquired from a different human body in advance according to physical characteristics such as height and physique and conditions such as gender. The large intestine model is output to the position identification unit 322 on the large intestine model and the corresponding unit 324.

The large intestine model upper position specifying unit 322 specifies a position on the large intestine model corresponding to the imaging position in the large intestine on the acquired large intestine model based on the control of the control unit 350.

As shown in FIG. 6, the large intestine model upper position identification unit 322 includes a reference position detection unit 322a and a conversion unit 322b.

The reference position detection unit 322a detects a reference position that serves as a reference for the moving distance based on the control of the control unit 350. Here, the measurement start point, which is one of the reference positions, is the point where the imaging itself of the inside of the body by the endoscope device is started.

Based on the control of the control unit 350, the conversion unit 322b converts the movement distance in the body calculated by the large intestine position identification information acquisition unit 321 into the distance on the large intestine model, and changes the movement direction in the large intestine on the large intestine model. Convert to the moving direction of.

The corresponding unit 324 associates the acquired image information with the position on the large intestine model based on the control of the control unit 350.

The display unit 400 simultaneously displays the image output from the image acquisition unit 310 and the guide image output from the guide image generation unit 320.

As described above, in the present invention, the image acquisition unit 310 acquires an captured image obtained by capturing the inside of the large intestine in the subject with an endoscope device. Then, the large intestine position identification information acquisition unit 321 acquires information for specifying the position of the endoscope device in the large intestine when the captured image is captured, based on the acquired image. The large intestine model acquisition unit 323 acquires the large intestine model in the subject. The large intestine model upper position identification part 322 specifies the position on the large intestine model corresponding to the position identification information in the large intestine on the acquired large intestine model, and the corresponding part 324 relates to the acquired image on the specified large intestine model upper position. Performs the process of associating information. The detected position identification part 325 in the large intestine identifies the detected place on the large intestine model corresponding to the position identification information in the large intestine on the acquired large intestine model, and the corresponding part 324 is the detected place on the large intestine model. Performs the process of associating information about the image.

As a result, the guide image associated with the position of the insertion part of the endoscope device in the large intestine is detected because it shows the position of the insertion part on the large intestine model and the detected position on the large intestine model. It is possible to accurately grasp the place where the image is not present, and it is possible to prevent oversight of, for example, the back of the half-moon fold of the large intestine in endoscopy with high accuracy.

It can be used for colonoscopy.

100: Light source
200: Insert
210: Fiber
220: Illumination lens
230: Objective lens
300: Image processing unit
310: Image acquisition department
320: Guidance image generator
321: Large intestine position identification information acquisition department
322: Large intestine model upper position identification part
323: Large intestine model acquisition department
324: Corresponding part
325: Detected position identification part in the large intestine
350: Control unit
400: Display
500: External interface section
900: Endoscope device

Claims (4)

An image acquisition unit (310) that acquires an image of the inside of the large intestine in the subject taken by the insertion unit (200) of the endoscope, and an image acquisition unit (310).
A guide image generation unit (320) that generates a guide image from the image information acquired by the image acquisition unit (310),
An image captured by the insertion unit (200) of the endoscope acquired by the image acquisition unit (310) and a display unit (400) for displaying the guidance image generated by the guidance image generation unit (320). With
The guide image generation unit (320)
When the image is taken, the position information acquisition unit (321) in the large intestine that acquires the position information in the large intestine of the insertion unit (200) of the endoscope, and
The large intestine model acquisition unit (323) that acquires the large intestine model in the subject,
In the large intestine model, the large intestine model upper position identification part (322) that specifies the position on the large intestine model corresponding to the acquired position information in the large intestine,
In the large intestine model, the detected position identification part (325) in the large intestine that identifies the detected location,
An endoscope characterized by having a corresponding portion (324) that associates the position information on the identified large intestine model with the large intestine model and the detected position information of the specified location on the large intestine model. Mirror device. The position identification information acquisition unit (321) in the large intestine
An image storage unit (321a) that stores the image output from the image acquisition unit (310), and
A direction calculation unit (321b) that calculates the direction of movement in the large intestine from the measurement start point of the endoscope insertion unit (200) based on the image acquired by the image acquisition unit (310),
A claim characterized by having a distance calculation unit (321c) for calculating the moving distance of the endoscope insertion unit (200) in the large intestine based on the image acquired by the image acquisition unit (310). Item 1. The endoscope device according to item 1. The position identification part (322) on the large intestine model is
A reference position detection unit (322a) that detects a reference position that serves as a reference for the distance traveled,
A conversion unit (322b) that converts the movement distance in the body calculated from the position identification information acquisition unit (321) in the large intestine into the distance on the large intestine model, and converts the movement direction in the large intestine into the movement direction on the large intestine model. The endoscope device according to claim 1 or 2, wherein the endoscope device has. The endoscope device according to any one of claims 1 to 3, wherein the image of the inside of the large intestine acquired by the image acquisition unit (310) is an image of the back of the half-moon fold of the colon.

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