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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.
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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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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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Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
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Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

Radiological Investigation III: Pulmonary Angiogram and PET Scan

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Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
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A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
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Imaging Studies for Cardiovascular System IV: CMRI01:21

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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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Retinal Vascular Reactivity as Assessed by Optical Coherence Tomography Angiography
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Retinal Vascular Reactivity as Assessed by Optical Coherence Tomography Angiography

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Optical coherence angiography: A review.

Adam Wylęgała1, Sławomir Teper, Dariusz Dobrowolski

  • 1Departament of Ophthalmology, Santa Barbara Hospital, Sosnowiec Ophthalmology Clinic, Railway Hospital Katowice, II School of Medicine with the Division of Dentistry in Zabrze, Silesian Medical University, Katowice, Poland.

Medicine
|October 15, 2016
PubMed
Summary
This summary is machine-generated.

Optical Coherence Tomography Angiography (OCT-A) offers high-resolution retinal imaging for diagnosing vascular diseases like AMD and DR. While promising, OCT-A has limitations such as motion artifacts, requiring careful interpretation in clinical settings.

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Vascular Biology

Background:

  • Retinal vascular diseases are a leading cause of blindness.
  • Optical Coherence Tomography Angiography (OCT-A) is a noninvasive imaging technique.
  • OCT-A visualizes retinal vasculature with high resolution.

Purpose of the Study:

  • To review the applications of OCT-A in retinal vascular diseases.
  • To evaluate OCT-A's diagnostic capabilities for conditions like AMD and DR.
  • To discuss the advantages and limitations of OCT-A.

Main Methods:

  • Review of relevant literature on OCT-A, AMD, and DR.
  • Analysis of OCT-A's use in diagnosing neovascularization, occlusions, and vessel abnormalities.
  • Examination of OCT-A's ability to quantify parameters like vessel density and flow index.

Main Results:

  • OCT-A successfully diagnoses various retinal conditions and anterior segment neovascularization.
  • Studies compare OCT-A with fluorescein angiography, showing differences in vascular density in AMD patients.
  • OCT-A has limitations including motion artifacts and limited field of view, but offers high repeatability and resolution.

Conclusions:

  • OCT-A is a promising tool for visualizing retinal vasculature and quantifying blood flow.
  • The technique provides reliable images for clinical use.
  • Emerging applications include assessing anti-VEGF therapy and studying choriocapillaries.