Radiographic Evaluation of Normal Pressure Hydrocephalus

Area of Science:

• Neurology
• Radiology
• Medical Imaging

Background:

• Normal pressure hydrocephalus (NPH) presents as a triad of gait disturbance, cognitive decline, and urinary incontinence.
• Characteristic imaging findings are crucial for NPH diagnosis.

Purpose of the Study:

• To provide an overview of the radiographic evaluation and imaging features of Normal Pressure Hydrocephalus (NPH).
• To highlight key imaging findings that aid in NPH diagnosis and differentiation from other conditions.

Main Methods:

• Review of characteristic radiographic and advanced imaging features associated with NPH.
• Discussion of imaging findings in idiopathic and congenital NPH subtypes.
• Exploration of advanced imaging techniques such as PET and MR elastography for CSF dynamics and brain stiffness evaluation.

Main Results:

• Ventriculomegaly is a common but nonspecific imaging feature of NPH.
• Specific features like high-convexity tight sulci and enlarged sylvian fissures are associated with idiopathic NPH.
• Disproportionately enlarged subarachnoid space hydrocephalus is a key diagnostic feature for idiopathic NPH.

Conclusions:

• Radiographic evaluation is essential for diagnosing NPH.
• Advanced imaging techniques can improve diagnostic accuracy and differentiate NPH from neurodegenerative diseases.
• Recognizing specific imaging patterns aids in the management of NPH patients.