Figure 4

Pseudo-color images of D (A), D* (B) and f (C) value in IVIM-DWI images in the same 51-year-old healthy volunteer as in Fig. 3. The D, D* and f values of the left ventricular myocardium were uniform. The D, D* and f values of the interventricular septum were 0.0028 × 10⁻³ mm²/s, 0.61 × 10⁻³ mm²/s and 0.22, respectively. D value, diffusion coefficient; D* value, perfusion coefficient; f value, perfusion fraction; IVIM, intravoxel incoherent motion; DWI, diffusion-weighted image. (D) The measured signal intensity points are distributed near the fitting curves, which reflect a higher image quality without obvious impact by respiratory movement and heartbeat. Meanwhile, the dual-exponential algorithm demonstrates a better fitting effect than mono-exponential algorithm.