id	keyword
american_scientific_journal-4545	tomography
american_scientific_journal-4545	system
american_scientific_journal-4545	oct
american_scientific_journal-4545	coherence
american_scientific_journal-4545	samples
american_scientific_journal-4545	figure
american_scientific_journal-4545	imaging
american_scientific_journal-4545	light
american_scientific_journal-4545	signal