Figure 1
The design of the Callascope promotes visualization of the cervix for diagnostic image capture without the speculum. (a) Detailed schematic of Callascope camera. Th: thickness, I.D: inner diameter, O.D: outer diameter. The camera module has a 2MP CMOS sensor, a lens, white illumination LED ring, and a micro processing board. A circular 5 mm hydrophobic window (Edmund optics) is placed over the camera lens and a concentric LED window is placed over the LEDs. A thin layer of black epoxy is applied between the outer edge of the hydrophobic window and the inner edge of the LED window to prevent LED illumination from causing a vignette in the image. The camera module is wired to a micro processing board that controls the LED brightness and connects the camera to a USB board. A female-to-male USB adapter is used to connect the USB board to a computer. A USB adaptor can be attached to enable connection to a phone or a tablet. (b) CAD model of the Callascope camera. (c) CAD model of the Callascope camera inserted into the introducer. (d) Close-up of the spray nozzle of the Callascope showing the fluid distribution path over a cervix. (e–i) Schematics of cervix visualization used in clinical studies. (e) The speculum inserted in closed position into a vagina with a tilted uterus. (f) Speculum bills expanded and used to center the cervix for the exam. The Callascope camera, without the introducer was inserted through the speculum to obtain an image with the cervix view enabled by the speculum. (g) The Callascope camera and introducer inserted into a vagina with a tilted uterus for cervix imaging without the speculum. (h) The Callascope introducer lip centering the cervix to enable imaging with the Callascope camera. (i) schematic of a cervix showing the cervix quadrants and os (central red oval) that need to be viewed during cervix examination.
