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Doppler Optical Coherence Tomography of Retinal Circulation

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Published on: September 18, 2012

Comparison between spectral-domain optical coherence tomography-based and partial coherence interferometry-based

So Min Ahn¹, Young Ho Kim², Cheolmin Yun²

¹Department of Ophthalmology, Dongguk University Ilsan Hospital, Goyang, South Korea.

Scientific Reports

|November 18, 2024

Summary

Spectral-domain optical coherence tomography (SD-OCT) and partial coherence interferometry (PCI) provide highly consistent axial length (AL) measurements in eyes with chorioretinal diseases. However, the significant mean difference indicates these AL measurements are not interchangeable.

Keywords:

Axial length Correlation Chorioretinal disease Optical coherence tomography Partial coherence interferometry

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Area of Science:

Ophthalmology
Biomedical Engineering
Medical Imaging

Background:

Accurate axial length (AL) measurement is crucial for ophthalmic procedures.
Chorioretinal diseases can potentially affect AL measurement accuracy.
Comparing different biometry techniques is essential for clinical application.

Purpose of the Study:

To compare axial length (AL) measurements using spectral-domain optical coherence tomography (SD-OCT) and partial coherence interferometry (PCI) in eyes with chorioretinal diseases.
To assess the agreement and interchangeability of AL measurements between SD-OCT and PCI biometry.
To investigate factors influencing measurement differences.

Main Methods:

Retrospective analysis of medical records from 73 patients (123 eyes).
Inclusion of eyes with various chorioretinal diseases.
Comparison of AL measurements obtained via SD-OCT-based and PCI-based biometry.

Main Results:

High consistency and strong correlation were observed between SD-OCT and PCI AL measurements (ICC=0.996, r=0.982).
A statistically significant mean difference of -0.09 ± 0.17 mm was found between the two methods.
The presence of an epiretinal membrane significantly affected the measurement difference (P=0.014).

Conclusions:

While SD-OCT and PCI biometry show strong correlation for AL measurements, they are not interchangeable due to significant mean differences.
Clinical decisions requiring precise AL values should consider the specific biometry method used.
Further research may be needed to refine measurements in eyes with specific pathologies like epiretinal membranes.