Correction: A non‑invasive nanoparticles for multimodal imaging of ischemic myocardium in rats.

Correction: J Nanobiotechnol (2021) 19:82 10.1186/s12951-021-00822-7

After the publication of the original article [1], the authors have identified mistakes in Fig. 2d, Fig. 5b, and Additional file 1: Figure S7. The revised figures are shown in this correction. All authors sincerely apologize for these errors.

Fig. 2

The safety profile of NPs. a Morphology of normal H9C2 cells and co-incubation with IMTP-Fe3O4-PFH NPs (scale bar: 100 μm). b Cell viability of H9C2 cells after co-incubation with different concentrations of IMTP-Fe3O4-PFH NPs. c Blood biochemical indexes analysis of SD rats from the control group and the experimental groups at 1, 3, 7, and 14 d post intravenous injection of IMTP-Fe3O4-PFH NPs. d HE staining of major organs from the control group and 14 d experimental group after 14 d of intravenous administration with IMTP-Fe3O4-PFH NPs (scale bar: 100 μm)

Fig. 5

Phase transition and US imaging in vitro. a Light microscope images of phase transformation induced by LIFU (scale bar = 10 μm). b The ultrasound imaging (left: B-Mode, right: CEUS) of IMTP-Fe3O4-PFH NPs with time- and intensity-dependent ADV. Quantitative analysis of the echo intensity of NPs after LIFU irradiation at different intensities and time in B-mode (c) and CEUS-mode (d)

Additional file 1: Figure S7. ADV and US imaging of IMTP-Fe3O4 NPs at different intensities of LIFU irritation and different time in vitro. Echo intensity did not change in all cases.