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Related Concept Videos

Computed Tomography01:10

Computed Tomography

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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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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Imaging Studies III: Computed Tomography01:27

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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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Updated: Sep 19, 2025

Doppler Optical Coherence Tomography of Retinal Circulation
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Widefield OCT angiography.

Yali Jia1, Tristan T Hormel2, Thomas S Hwang2

  • 1Casey Eye Institute, Oregon Health and Science University, Portland, OR, USA; Department of Biomedical Engineering, Oregon Health and Science University, Portland, OR, USA.

Progress in Retinal and Eye Research
|June 15, 2025
PubMed
Summary
This summary is machine-generated.

Widefield optical coherence tomography angiography (OCTA) expands retinal imaging capabilities, enabling simultaneous visualization of both central and peripheral pathologies. This advancement significantly improves diagnostic accuracy for various eye conditions.

Keywords:
OCT angiographyRetinaWidefield imaging

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Retinal Diagnostics

Background:

  • Optical coherence tomography angiography (OCTA) provides high-resolution, non-invasive imaging of retinal microvasculature.
  • OCTA is crucial for diagnosing and monitoring conditions like diabetic retinopathy and vein occlusions.
  • Conventional OCTA is limited by a small field of view, potentially missing peripheral pathologies.

Purpose of the Study:

  • To review technical innovations in widefield OCTA.
  • To highlight the clinical utility of widefield OCTA.
  • To emphasize the growing importance of widefield OCTA in ophthalmic practice and research.

Main Methods:

  • Review of technological advancements in OCTA imaging.
  • Analysis of clinical applications and diagnostic capabilities of widefield OCTA.
  • Comparison of widefield OCTA with conventional imaging techniques.

Main Results:

  • Widefield OCTA extends the field of view to the mid-periphery and beyond.
  • This enables simultaneous detection of macular and peripheral retinal pathology.
  • Widefield OCTA significantly broadens diagnostic and research applications in ophthalmology.

Conclusions:

  • Widefield OCTA overcomes the field-of-view limitations of conventional OCTA.
  • It enhances the comprehensive assessment of retinal diseases.
  • Widefield OCTA represents a significant advancement in ophthalmic imaging and patient care.