Figure 2.

(A) XRD patterns of CA/BaSO₄ microcapsules measured with 2θ ranging from 5° to 90.0° in a step of 0.02° under a Cu Ka radiation. (B) CT images of CA/BaSO₄ microcapsules using various concentrations of Na₂SO₄ as injection liquid arranged from 0 mg/mL to 7.5 mg/mL (b–e: 0, 2.5, 5, 7.5 mg/mL); phospate buffered saline was used as the negative control (a) and iodixanol solution was used as the positive control (f). (C) SEM images of barium sulfate nanoclusters.

Abbreviations: XRD, x-ray diffraction; CA/BaSO₄, chitosan-coated alginate microcapsule loaded with in situ synthesized barium sulfate; CT, computed tomography; SEM, scanning electron microscopy.