Method and device for three-dimensionally positioning retinal hole
A three-dimensional positioning and retinal technology, applied in medical science, image data processing, 3D modeling, etc., can solve problems such as unreachable, limited operation, and inability to find small lesions, and achieve low cost and increase the success rate of surgery.
Inactive Publication Date: 2011-10-26
ZHONGSHAN OPHTHALMIC CENT SUN YAT SEN UNIV
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[0005] Direct ophthalmoscopy is the most commonly used method in primary hospitals. It has the advantages of simplicity, convenience, and low cost. However, there are problems such as no three-dimensional effect, small observation range, inability to detect minor lesions, and no objective recording method. It has no guiding significance, so it is rarely used in specialized eye hospitals
[0006]Three-face mirror examination method is mainly used to find peripheral vitreoretinal lesions, but it also has obvious shortcomings such as no three-dimensional sense, no overall sense, and no objective recording method. Clinical application is also limited
[0007] Although the indirect ophthalmoscopy method overcomes the shortcomings of the direct ophthalmoscopy method, there are still many deficiencies, such as seeing only the inside of the eyeball Partial two-dimensional images cannot reveal the precise range and volume of the lesion, as well as the corresponding relationship with the ocular surface anatomical landmarks
The advantage of B-ultrasound examination is that images can be obtained even in the case of opacity in the refractive media, but the images obtained are of low quality, low resolution, and are three-dimensional black and white images, which are far from meeting the requirements of clinical surgical guidance.
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[0036] The three-dimensional positioning method and device for retinal breaks of the present invention can establish the actual three-dimensional model of the retina and the three-dimensional model of the eyeball, and perform coincidence and matching on the three-dimensional model of the retina and the three-dimensional model of the eyeball, and the point that cannot be matched is the retinal detachment area. Furthermore, the coordinates of the retinal break can be obtained in the retinal detachment area, and the three-dimensional image of the retinal break and its projection on the surface of the sclera can be clearly, comprehensively and three-dimensionally presented, helping doctors to detect retinal lesions in patients in a timely and accurate manner, and determine the cause of the retinal break. The location guides the operation according to its projected position on the sclera, and improves the success rate of the operation; and the cost of the present invention is relativ...
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The invention discloses a device for three-dimensionally positioning a retinal hole. The method comprises the following steps of: acquiring an image of each position of a retina; sampling two images of adjacent positions, unifying the zoom scales and the directions of the images and superposing the two images; jointing peripheral images on a sphere of which the radius is R to complete the establishment of a three-dimensional retina model; establishing a three-dimensional eyeball model according to the eye axis value L, the retina width 2h, the retina radius r and the scleral radius R of an individual; and matching the three-dimensional retina model and the three-dimensional eyeball model by superposing and determining the position coordinates of a retinal hole A in a retinal detachment region consisting of points which cannot be matched. The method has the advantages of clearly, totally and three-dimensionally showing a three-dimensional image of the retinal hole and the projection of the retinal hole on the surface of a sclera, helping a doctor correctly find retinopathy of a patient in time, determining the position of retinal hole pathological change, guiding the operation of a surgery according to the projection position of the retinal hole on the sclera and improving the success rate of operation.
Description
technical field [0001] The invention relates to the technical field of image information processing, in particular to a three-dimensional positioning method for a retinal hole and a three-dimensional positioning device for a retinal hole. Background technique [0002] Retinal-vitreous disease is one of the most common and serious of all ophthalmic diseases. With the continuous development of society and economy, the average life expectancy of the population has been increasing. In recent years, the incidence of vitreoretinal diseases represented by diabetic retinopathy, retinal detachment, proliferative vitreoretinopathy, age-related macular degeneration, and high myopia fundus lesions rate is increasing. [0003] Among them, RD (renital detachment, retinal detachment) is a common blinding vitreoretinal disease. The disease has an acute onset, rapid development, and serious damage to vision. It requires early detection, diagnosis, and timely surgical treatment. Epidemiolog...
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IPC IPC(8): A61B3/10A61B3/107G06T17/00
Inventor唐仕波丁小燕刘伟李涛
OwnerZHONGSHAN OPHTHALMIC CENT SUN YAT SEN UNIV