The purpose of the study is to understand how the contrast agent distributes and is eliminated in the body, as observed through repeated MRI scans. The study will also monitor any side effects that may occur from the administration of Gadovist. Participants will receive an injection of the contrast agent into the spinal canal, and then undergo a series of MRI scans to track the movement and clearance of the contrast in the brain.

Throughout the study, researchers will analyze changes in the MRI images to gain insights into the dynamics of cerebrospinal fluid movement. This information could help improve understanding of the condition and potentially lead to better treatment options for patients with INPH. The study will also compare the distribution of the contrast agent with other MRI sequences and fluid dynamics parameters to explore possible mechanisms driving the distribution of cerebrospinal fluid.