Related Experiment Video
Updated: Jun 3, 2026
09:33
Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
Published on: July 28, 2013
Diffusion tensor imaging detects rarefaction of optic radiation in glaucoma patients
Tobias Engelhorn1, Georg Michelson, Simone Waerntges
1Department of Neuroradiology, University Erlangen-Nuremberg, Germany. tobias.engelhorn@uk-erlangen.de
Academic Radiology
|March 8, 2011
Summary
Diffusion tensor imaging (DTI) reveals optic radiation rarefaction in glaucoma patients, correlating with optic nerve damage. This technique assesses pathological changes in vivo, aiding glaucoma diagnosis.
Area of Science:
- Neuroimaging
- Ophthalmology
- Medical Physics
Background:
- Glaucoma is characterized by optic nerve damage.
- Optic radiation fibers can undergo rarefaction.
- Diffusion tensor imaging (DTI) is a neuroimaging technique capable of visualizing white matter tracts.
Purpose of the Study:
- To assess pathological changes in the optic radiation of glaucoma patients using DTI.
- To correlate DTI findings with ophthalmological examinations.
Main Methods:
- Fifty glaucoma patients and 50 healthy controls underwent 3T MRI.
- Fiber tracts were analyzed for rarefaction using volume rendering.
- Results were correlated with optic nerve atrophy and retinal contrast sensitivity.
Main Results:
- 44% of glaucoma patients showed significant optic radiation rarefaction (reduced volume to 67%).
- Rarefaction correlated with the stage of optic nerve atrophy (Kendall tau-b 0.272, P = .016).
- Cerebral microangiopathy affecting the optic radiation was more prevalent in glaucoma patients (P < .05).
Conclusions:
- Glaucomatous optic nerve atrophy involves anterograde and retrograde transneuronal rarefaction of the optic radiation.
- DTI can assess these in vivo changes.
- DTI findings correlate well with established ophthalmological examinations.
Related Concept Videos
01:17Assessment of Diffusion and Perfusion
Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...
01:25Glaucoma: Overview
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...