Figure 1.

Computed tomography (CT) of the brain on January 15, 2019 and magnetic resonance imaging (MRI) of the brain on January 11, 2019. Abnormal signals were marked by red arrow. (A) The unenhanced high-density axial CT images within the left lentiform nucleus. The range of this abnormal signal was about 11.4 mm * 10.6 mm, and the CT value was 50.7 Hu. (B) The left lentiform nucleus showed a slightly high signal intensity by diffusion weighted imaging (DWI). (C) The left lentiform nucleus showed an equal signal intensity on ADC images. The ADC value of the abnormal lesion center was 0.636 * 10⁻³ mm²/s. (D) The left lentiform nucleus with a high signal intensity on T1-weighted MR images. The range of this abnormal signal is about 21 mm * 11 mm. (E) The left lentiform nucleus showed a low signal intensity on T2-weighted scans. (F) The left lentiform nucleus indicated a low signal intensity on fluid-attenuation inversion recovery (FLAIR) sequences.