Fig. 13.1
L*a*b* color space
Fig. 13.2
b* value with different light intensity levels. The b* values of No. 2, No. 3, and No. 4 are the same after proper adjustments for brightness (L* value is within 40–80)
Fig. 13.3
b* value with different distances from lens of angioscope to the region of interest. The b* values of No. 1 (short distance), No. 2 (middle distance), and No. 3 (long distance) are the same after proper adjustments for brightness (L* value is within 40–80)
Fig. 13.4
The inverse linear correlation between b* value and the fibrous cap thickness covering the lipid core. Yellow color intensity was high (b* >23: represented by yellow circles) in all locations with the fibrous cap thickness <100 μm [14]
References
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Lehmann KG, Oomen JA, Slager CJ, deFeyter PJ, Serruys PW. Chromatic distortion during angioscopy: assessment and correction by quantitative colorimetric angioscopic analysis. Catheter Cardiovasc Diagn. 1998;45:191–201.
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