Stratus-OCT is an older time-domain technology; a modern OCT advantage is higher speed and resolution.

Stratus-OCT is an older time-domain technology; a modern OCT advantage is higher speed and resolution.

• A. Stratus-OCT Is Time-Domain With Moving Mirror and Lower Resolution
• B. Stratus-OCT Is Spectral-Domain
• C. Stratus-OCT Uses Polarization-Sensitive Detection
• D. Stratus-OCT Cannot Image the Retina

Answer: (A)

Stratus-OCT uses time-domain technology with a moving reference mirror to encode depth. That mechanical scanning limits how fast it can acquire data and constrains the axial resolution, giving lower image quality compared with newer systems. Modern OCT uses Fourier-domain detection with a stationary reference arm, reading the whole depth information from a spectrum, which allows much higher A-scan speeds and finer axial resolution. So describing Stratus-OCT as time-domain with a moving mirror and lower resolution best explains why modern OCT brings higher speed and better resolution. The other points don’t fit: Stratus is not a spectral-domain system, polarization-sensitive detection isn’t a defining feature for it, and it can image the retina.

Stratus-OCT uses time-domain technology with a moving reference mirror to encode depth. That mechanical scanning limits how fast it can acquire data and constrains the axial resolution, giving lower image quality compared with newer systems. Modern OCT uses Fourier-domain detection with a stationary reference arm, reading the whole depth information from a spectrum, which allows much higher A-scan speeds and finer axial resolution. So describing Stratus-OCT as time-domain with a moving mirror and lower resolution best explains why modern OCT brings higher speed and better resolution. The other points don’t fit: Stratus is not a spectral-domain system, polarization-sensitive detection isn’t a defining feature for it, and it can image the retina.