Pirop - Ophthalmic Scanner (A+B+CCT)

Pirop

PIROP – state-of-the-art ophthalmic ultrasonic device for Biometry ,

Visualization and Pachymetry of eyeballs (A-Scan + B-Scan + CCT- Pachymeter) – modified version.

A-SCAN – Ocular Lens biometrics
Digital ‘A-scan’ tool for ophthalmology, biometry and lens power calculation of intra-ocular implants.

B-SCAN – Eye examination
Modern ‘B-scan’ tool for ophthalmology, interior eyeball imaging, retina, optical nerve …

CCT- PACHYMETER (P-SCAN) – Ocular cornea biometrics
Up-to-date ultrasonic pachymeter used to measure the thickness of the eye’s cornea (glaucoma screening and refractive surgery), with a very high sampling frequency –400MHz (a significant increase in measurement accuracy – ≤ 2 μm). Corneal pachymetry is an important test in the early detection of glaucoma (central corneal thickness CCT), and it help also surgeons by providing graphical surgical plans to eliminate corneal astigmatism.

PIROP user’s interface based on touch screen technology makes operation easy and user-friendly. The touch screen can be also operated not only with fingers, but also using the enclosed stylus to keep it clean.

Specifications

A-SCAN

Complete and quick biometry :
– eye axial length (AXL)
– anterior chamber depth (AC)
– lens thickness (LENS)
– vitreous length (VITR)

Measurement of all eye types: normal, cataract, dense cataract, aphakic,silicone oil vitreous, pseudoaphakic (PMMA, ACRYLATE, SILICONE)

OL six formulas: SRK II, SRK T, Holladay, Hoffer-Q, Binkhorst II, Haggis

Post refractive formulas: Double-K SRKT, Latkany / Flat-K SRKT/, Latkany /avg-K SRKT/, Masket

IOL power calculation comparison (for different lenses and calculation methods)

Contact and immersion methods (the immersion tube attached)

Probe with central light beam for correct eye positioning

Automatic TGC adjustment;GAIN adjustment up to 110dB

Memory of 20 scans with measurements for further analysis

Calculations of means and standard deviations

Automatic control of measurement scatters (with manual correction)

Customizable for 10 users, 10 profiles for each.

Adjusting and testing via attached calibrator

Probe frequency – 12 MHz

Range of scan 45 mm / 2500 points per line

Clinical resolution 0.1 mm

Electronic resolution –/+ 0.01 mm

POWER SUPPLY

Power supply from external AC/DC power adapter:
– input: 100-230V AC 50/60Hz / max 0.7A
– output: +12V DC / 2 A

Power consumption (12 DC supply) – ca 12 W

Electrical safety standards
– Medical device Class IIa complies with MDD 93/42 EEC
– Scanner complies with requirements for Class II devices of EN/IEC 60601-1

B-SCAN

Probe frequency: 12 .. 15 MHz

Scanning angle : 55ᵒͦ

Range of scan: 20 .. 60 mm

Gain/dymamics up to 110dB / 90dB

TGC – zone gain adjustment in selected eye

256 Levels Gray Scale

Axial clinical resolution: 0.12 mm

Lateral clinical resolution : 0.3 mm

Display modes : B, B+A, B+B

A-mode for selected line CV (in Run and Freeze modes)

Dynamic Range Correction

Image cache memory M1..M4 independent for right and left eyes

Zoom function (x2) in Run and Freeze modes

Digital Gain Correction in Freeze mode

Cineloop function (about 6 second) independent for left/right eyes

Distances measurements with ultrasound velocity correction

Area and angle measurements

Pointers, comments entered by the user

Composite video output for videoprinter

CCT – PACHYMETER

Quick thickness measurements for all corneal types
– the measurement of central corneal thickness (CCT)
– thickness measurement at arbitrarily selected points
– automatic and manual measurements
– calculation of mean from measurements
– standard deviation of the measured thickness
– ability for rejecting inaccurate measurements

Very high level of accuracy and repeatability of all measurements:
– sophisticated algorithms for the accuracy improvement
– very high frequency for measuring purpose- 400 MHz
– high averaging ratio
– 512 automatic measurements cycles

Intra-ocular pressure (IOP) calculations with measuring and/or manual correction

Ten IOP correction formulas : Kohlhas/Shah, Argus et al. Whitarce et al, Doughty, Ehlers, Dresden, Stodmeister, custom-own

BIAS percentage deviation of the measured thickness from 60% to 130%

TEST function for automatic checking of operation correctness (without using external phantoms or patterns)

Nine defined maps of corneal thickness with the number of points: 1, 5, 9, 13, 21, 25, 1 MULTI, 5 MULTI, 9 MULTI (central, paracentral, peripheral, parietal, mixed)

20 MHz probe operating frequency

Default sound velocity – 1640 m/s ; range from 1400 to 2000 m/s

Measurement range from 220 μm to 1100 μm

Measuring accuracy ≤ 2 μm

Resolution 1 μm

GENERAL PROPERTIES

Touch Screen
– easy, ergonomic and user-friendly operation via displayed menu
– virtual keyboard for entering patient data, etc.

Functional knob (gain control, review results, cine etc.)

Color LCD 7” display

Internal patient’s databas

Ten (10) user profiles

Support for barcode reader