Introduction
Ultrasonic examinations are increasingly important in modern medicine, particularly for sinus evaluations. The ultrasonic probe functions as both a transmitter and receiver of ultrasonic impulses, with echoes indicating changes in acoustic impedance.

Specifications
- System: PC module with USB 2.0 interface
- System Requirements: Pentium PC min. 500 MHz, USB 2.0 port, Windows 98, ME, 2000, XP
- Method: A-mode
- Standards: EN 60601-1 / 1-1 / 1-2 / IEC 1157 / MPG
- Probe: Focused, 14 mm diameter
- Probe Frequency: 3.5 MHz
- Impulse Frequency: 120 Hz
- Probe Power: < 20 mW/cm²
- Total Amplification: 80 dB
- Depth Amplification: 20 dB
- Depth Range: Sinus frontalis - 3.5 cm, Sinus maxillaris - 7.5 cm
- Switchover: Automatic or manual by footswitch

Procedures and Usage
The ultrasonic method is quick, user-friendly, and safe, with no dangerous side effects. It is particularly useful for monitoring sinusitis progress. The examination is reliable and requires no computer expertise.

Data Management
All data and measured curves are automatically stored on the computer's hard disk. Printouts can be made using any Windows printer. Four sinus images can be stored for comparison, with depth amplification stored in four selectable curves.

Accessories
- 1 ultrasound probe
- 1 bottle of sonogel
- 1 footswitch
- 1 probe holder
- 1 program CD
- 1 instruction manual

Conclusion
The ultrasonic method serves as a cost-effective supplement or alternative to x-rays, widely used in ENT practices in Germany.