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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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Imaging Studies VII: Vascular Imaging01:19

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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Relationships between multimodal ocular imaging and white matter hyperintensity volume.

Rui Li1, Ying Hui2, Jing Li3

  • 1Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China.

Quantitative Imaging in Medicine and Surgery
|October 13, 2025
PubMed
Summary

Ocular imaging biomarkers, including retinal nerve fiber layer thickness and vessel width, are associated with white matter hyperintensities (WMH) volume. These findings suggest potential for non-invasive, early detection of cerebral small vessel disease.

Keywords:
White matter hyperintensity volume (WMH volume)fundus photographyoptical coherence tomography (OCT)retinal thickness

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Area of Science:

  • Ophthalmology
  • Neurology
  • Radiology

Background:

  • White matter hyperintensities (WMH) are key markers of cerebral small vessel disease, linked to stroke, cognitive decline, and mortality.
  • Current MRI assessments for WMH are costly and impractical for large-scale monitoring.
  • Ocular imaging offers a non-invasive alternative due to shared microvascular characteristics between the retina and brain.

Purpose of the Study:

  • To explore associations between multimodal ocular imaging biomarkers and WMH volume.
  • To enable earlier, non-invasive detection of cerebral small vessel disease.
  • To investigate lobe-specific WMH and multimodal biomarkers.

Main Methods:

  • 761 participants underwent ophthalmic (OCT, fundus photography) and neuroimaging (MRI) evaluations.
  • Ocular metrics included macular retinal nerve fiber layer (mRNFL), macular ganglion cell-inner plexiform layer (mGCIPL), central retinal arteriolar equivalent (CRAE), and arteriole/venular ratio (AVR).
  • Generalized linear regression models analyzed associations between ocular biomarkers and WMH volume, adjusting for demographics and vascular risk factors.

Main Results:

  • Thinner mGCIPL and macular ganglion cell complex (mGCC) associated with greater WMH volume in total brain, temporal, and occipital lobes.
  • Reduced macular inner nuclear layer (mINL) correlated with larger WMH in the total brain and specific lobes.
  • Smaller AVR, narrower CRAE, wider CRVE, lower fractal dimension (FD), and wider global vein width were linked to increased WMH volume, particularly in the occipital lobe. Associations were stronger in females.

Conclusions:

  • OCT and fundus photography parameters are independently associated with WMH volume.
  • These ocular parameters show potential as biomarkers for early detection and monitoring of WMH.
  • Multimodal ocular imaging may facilitate precise identification and surveillance of white matter alterations.