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Figure 2 Example of a discrepancy between the optical coherence tomography and integrated backscatter intravascular ultrasound diagnosis. (A) Histological image (Masson’s trichrome staining). (B) Optical coherence tomography image. (C) Conventional intravascular ultrasound image. (D) Integrated backscatter intravascular ultrasound image. A fibrous lesion was detected by optical coherence tomography as a homogeneous, highly backscattering (signal-rich) region (arrowhead in B). However, the fibrous lesion was misclassified as intimal hyperplasia by the integrated backscatter intravascular ultrasound image (arrowhead in D) because the fibrous lesion consisted of fibrosis with minimal collagen fiber. CL = calcification. Bar = 1 mm.
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