Impact of A-Scan Rate on Image Quality and Acquisition Time in OCT.

Autor: Bodenbender JP; Department for Ophthalmology, University of Tuebingen, Tübingen, Germany., Kowalski M; Department for Ophthalmology, University of Tuebingen, Tübingen, Germany., Stingl K; Department for Ophthalmology, University of Tuebingen, Tübingen, Germany., Ziemssen F; Department for Ophthalmology, University of Tuebingen, Tübingen, Germany.; University Eye Hospital Leipzig, University of Leipzig, Leipzig, Germany., Kühlewein L; Department for Ophthalmology, University of Tuebingen, Tübingen, Germany.
Jazyk: angličtina
Zdroj: Current eye research [Curr Eye Res] 2023 Oct; Vol. 48 (10), pp. 973-979. Date of Electronic Publication: 2023 Jul 10.
DOI: 10.1080/02713683.2023.2232957
Abstrakt: Purpose: This study aims to examine the impact of the A-scan rate in optical coherence tomography (OCT) on scan quality and acquisition time.
Methods: Two horizontal OCT scans per scan rate (20, 85, 125 kHz) of the right eye were captured with the same OCT device (Spectralis SHIFT, HRA + OCT, Heidelberg Engineering GmbH, Heidelberg, Germany) of patients who presented to the inherited retinal dystrophies consultation, thus predominantly challenging patients due to reduced fixation ability. Scan quality was measured by the Q score, a signal-to-noise-ratio (SNR). Acquisition time was measured in seconds.
Results: Fifty-one patients were included in the study. The highest quality was seen for an A-scan rate of 20 kHz (44.49 dB), succeeded by scans of an A-Scan rate of 85 kHz (38.53 dB) and of 125 kHz (36.65 dB). Differences in scan quality between the various A-scan rates were statistically significant. The acquisition time seen for an A-scan rate of 20 kHz (6.45 s) was significantly longer than those seen for an A-Scan rate of 85 kHz (1.51 s) and of 125 kHz (1.69 s).
Conclusion: An A-scan rate of 20 kHz resulted in a significantly higher scan quality but also a significantly longer acquisition time compared to scan rates of 85 kHz and 125 kHz. Differences between an A-scan rate of 85 kHz and 125 kHz were marginal.
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje