MKI67 and small cell lung carcinoma: A recent study compared the quantitative MRI parameters from conventional DWI, IVIM, and diffusion kurtosis imaging (DKI) in correlations with tumor Ki-67 and revealed that the (D value) from IVIM displayed the best performance among the three techniques for differentiating the high-Ki-67 group from the low-Ki-67 group, as well as distinguishing SCLC from NSCLC [83].