Eye ultrasound with an AB-scan
The ultrasound of the eye in the AB-scan mode makes it possible to conduct a more complex ultrasound of the eye, which allows you to overcome the limitations of individual A and B scans and combines the advantages of both these techniques. Modern AB-scanners give a three-dimensional image of the structure of the eye, so that it is possible to determine not only the linear, but also the volume characteristics of the objects under study.
The ultrasound of the eye in the form of AB scanning has found application primarily in the impossibility of conducting an ophthalmoscope due to the opacity of the refractive media of the eye. With the transparency of the eye media, AB scanning is used in the diagnosis of retinal detachment, to measure biometric parameters, to determine the dynamics of the tumor process.
Ocular ultrasound with an A-scan
An ultrasound of an eye in A-scan mode allows one-dimensional image of eye structures to be obtained. A-scan is used to measure various anatomical parameters of the eyeball structures (ultrasonic eye biometry) and as a review ultrasound.
What A-scan is used for:
- A-scan is aimed at detecting foreign bodies of the eye;
- determination of the localization and size of neoplasms of various parts of the eye, monitoring the dynamics of their development;
- diagnosis of the prevalence and height of detachment of the mesh and vascular membranes of the eye;
- detection of opacities, destructive foci, blood clots in the vitreous with the recognition of the degree of their mobility and density.
Eye and orbit ultrasound with a B-scan
During the B-scan, the received echoes reflected from the anatomical structures of the eye are converted into a two-dimensional image, thus forming a picture of the “ultrasonic cut”. This method of ultrasound is more informative and sensitive in detecting various pathological processes of the orbit, but is less accurate in comparison with A-scanning.
It allows you to determine the location, shape and size, the relationship with a number of located structures, as well as the acoustic density of the pathological focus (tumor, infiltrate, foreign body, opacity, foci of destruction, etc.).