HRS-9231

The purpose of this study is to evaluate the efficacy and safety of HRS-9231 for Central Nervous System (CNS) Magnetic Resonance Imaging (MRI); to demonstrate that, in patients requiring CNS MRI examinations, HRS-9231 is non-inferior to Gadobutrol in lesion visualization scores and show that, in patients requiring CNS MRI examinations, contrast-enhanced MRI with HRS-9231 is superior to unenhanced MRI in lesion visualization scores using the patients as their own controls; and to explore the population pharmacokinetic characteristics of HRS-9231 in CNS MRI subjects.