ArcScan Insight® 100 Device
The ArcScan Insight® 100 scanner is a precision high frequency ultrasound device for imaging and biometry of the eye. It uses core proprietary technology that originally developed in cooperation with Columbia/Weill University. A 20-60 MHz transducer scans the eye in an arc shaped motion whereby its curvature approximates the anterior ocular surface.
During this process the device produces images with 1 micron resolution of the cornea or the anterior segment. In addition, measurements can also be made of the anatomic structures comprising the anterior of the eye such as anterior chamber depth, angle-to-angle width, and sulcus-to-sulcus width, and pathologic structures, such as solid masses and cysts.
Designed for functional efficiency and ease of use, the system is comprised of four main components: the ArcScan Insight® 100 Scanner, the Insight software package, the fluidics module and the electronics unit.
The scanner is designed to comfortably position the patient so their eye is looking through the center of the EyeSeal Disposable while keeping their head still. EyeSeal Disposables are used to prevent cross contamination between patients.
The ArcScan Insight® 100 is able to perform three different types of scans:
Anterior Segment imaging and biometry
Anterior segment imaging is used for:
Biometry for lens replacement including sulcus to sulcus distance (for posterior chamber IOL) or angle-to-angle distance (for anterior chamber IOL)
Assessment of pathology
In anterior segment imaging mode, the scan radius is set to 12 mm during setup and the focal plane is set on the ciliary body.
Capsule imaging mode is used for:
Biometry for pre-op and post-op lens replacement including sulcus to sulcus distance, angle-to-angle distance, anterior chamber depth, capsule thickness, anterior capsule curvature, posterior capsule curvature, capsule diameter, and capsule volume
Assessment of pathology
The radius is set to 18mm and the scan area is set to image the entire eye using four equally spaced meridians.
Cornea imaging and biometry
Corneal imaging is used for:
Early detection of Keratoconus
Evaluation of corneal scars
The Corneal Imaging mode uses an arc radius of 8-9 mm to match the cornea’s radius of curvature. The scan area is set to image the entire cornea using four equally spaced meridians.
The ArcScan Insight System offers 5 different scan options to allow for fully automated image acquisition but also for customized manual imaging to adapt to the needs of each patient:
This option generates a full set of scans with auto-centering used on the first meridian. It is the default scan type of the device and centers the image on the corneal apex. The device will scan the patient’s eye and then calculate the position of the corneal apex before obtaining the images. As a variation this mode can be set to auto center before every meridian. In this case the device will recalculate the position of the corneal apex prior to each meridian.
NO CENTERING/MANUAL CENTERING
In some patients auto-centration may not be desirable, therefore the system offers two types of alternative scanning without auto-centration: a no-centering mode and a manual centration mode. Using the manual centration mode enables users to select the desired centration point, e.g. based on certain anatomic variations or due to the fact that the patient is unable to hold the eye steady. The machine will then perform the scans using the selected reference point.
In order to benefit from auto-centration but still retain the ability to manually make fine adjustments, the ArcScan Insight System features a continuous scan mode. This enables the user to precisely image a particular, small feature of the eye, such as a scar or implant haptic or a specific region around the zonules.
NEXT/REPEAT SCAN MODE
This mode is specifically designed for patients who have trouble holding their eye steady during the scanning procedure. Images are taken individually and the system will prompt the user after each scan to either repeat the scan or continue with the image acquisition.
ArcScan Insight® 100 SoftwareThe ArcScan Insight® 100 software was designed to enable users to quickly and easily obtain stunning images, conduct measurements and store them.
Corneal imaging and Biometry
The ArcScan Insight® 100 software enables users to view, manipulate, annotate and measure the produced scans. In viewing mode, users can adjust brightness and contrast, zoom in and out and conduct a black and white point adjustment.
In the analysis section the software offers a range of editing tools, such as snap/unsnap, a magic wand and an erase function. Also, the variety of surface selection options allow for automatic identification of the front surface, epithelium, flap or back surface of the cornea.
An added a-scan viewing function displays the a-scan measurement value wherever the mouse is hovering.
In display mode, the user can select from a range of different viewing modes, has the ability to conduct measurements of distances, radius of curvature or angles and display thickness maps for epithelium, stroma, cornea, flap, residual stroma and the stroma component of a flap. Naturally, everything can be saved or printed.
Anterior Segment Imaging and biometry
In this mode, the scan images obtained from the anterior segment can be viewed, annotated and measured. For measuring, users can choose between distance measurements, radius of curvature and angle measurements.
INDICATIONS FOR USE
The ArcScan Insight System is indicated for evaluation and/or planning of refractive surgery and evaluation of pathologies of the anterior segment such as trauma, tumors, cysts, glaucoma, and hypotony.
Scanning should not be attempted on un-repaired ruptured globes or in other situations where ocular integrity is questionable.