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Related Concept Videos

Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation01:21

Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

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Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...
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Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies01:20

Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies

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The key difference between Superficial Vein Thrombosis (SVT) and Deep Vein Thrombosis (DVT) lies in their location and severity.Clinical ManifestationsSVT typically presents with localized pain, tenderness, and redness along the course of a superficial vein, often accompanied by a palpable, cord-like structure under the skin. This condition is usually less dangerous than DVT but can be uncomfortable and may lead to complications such as cellulitis or, rarely, a clot extension into the deep...
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Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

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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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Varicose Veins II: Diagnostic Studies and Interprofessional Care01:26

Varicose Veins II: Diagnostic Studies and Interprofessional Care

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Varicose veins, or varicosities, develop when the valves in the veins, which control blood flow, weaken or damage. It causes blood to pool and the veins to enlarge. Understanding the clinical manifestations, diagnostic approaches, and management options for varicose veins is crucial for effective treatment and relief.Clinical manifestationsClinical manifestations of varicose veins include a heavy, achy feeling or pain after prolonged standing or sitting. This discomfort can often be relieved by...
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Arteries of Lower Limbs01:20

Arteries of Lower Limbs

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The external iliac artery transitions out of the body cavity, entering the femoral region of the lower leg, and is renamed the femoral artery at the point where it traverses the body wall. This artery is responsible for the distribution of blood to the thigh's deep muscles and the skin's ventral and lateral regions, achieved through several minor branches and the lateral deep femoral artery, which also spawns a lateral circumflex artery. The knee area receives blood from the genicular...
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Veins of Lower Limbs01:15

Veins of Lower Limbs

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The human body consists of an intricate network of veins responsible for the crucial task of blood drainage from the lower limbs. These veins can be categorized into two main types: deep veins and superficial veins.
Formed by the union of the medial and lateral plantar veins, the posterior tibial vein, rising through the calf muscle, assimilates the fibular vein. The anterior tibial vein, a superior extension of the foot's dorsalis pedis vein, merges with the posterior tibial vein at the...
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Related Experiment Video

Updated: Oct 16, 2025

Reduction of Radiation Exposure during Endovascular Treatment of Peripheral Arterial Disease Combining Fiber Optic RealShape Technology and Intravascular Ultrasound
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Digital Variance Angiography in Selective Lower Limb Interventions.

Rohit P Thomas1, Moritz B Bastian1, Simon Viniol1

  • 1Department of Diagnostic and Interventional Radiology, University Hospital Marburg, Philipps University of Marburg, Marburg, Germany.

Journal of Vascular and Interventional Radiology : JVIR
|October 15, 2021
PubMed
Summary
This summary is machine-generated.

Digital variance angiography (DVA) significantly improves contrast-to-noise ratio and image quality in lower limb angiography compared to digital subtraction angiography (DSA). DVA1 is recommended over DVA2 for better image quality, potentially aiding interventions and dose reduction.

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Area of Science:

  • Medical Imaging
  • Radiology
  • Vascular Interventions

Background:

  • Digital subtraction angiography (DSA) is a standard imaging technique for evaluating peripheral artery disease.
  • Improving image quality and reducing contrast agent use are key challenges in lower limb angiography.

Purpose of the Study:

  • To assess the benefits of digital variance angiography (DVA) in selective lower limb angiography.
  • To compare the performance of two DVA algorithms (DVA1 and DVA2) against conventional DSA.

Main Methods:

  • Retrospective analysis of 112 iodinated contrast media (ICM) and 40 CO2 angiograms from 15 and 13 patients, respectively.
  • DVA images were generated from unsubtracted source files, and CNR and subjective image quality were compared using the Wilcoxon signed-rank test.
  • Six radiologists evaluated images on a 5-grade Likert scale.

Main Results:

  • Both DVA algorithms demonstrated at least a 2-fold increase in contrast-to-noise ratio (CNR) (P < .001) compared to DSA.
  • DVA algorithms yielded significantly higher image quality scores than DSA, regardless of contrast agent (ICM and CO2).
  • DVA1 achieved superior or equivalent image quality compared to DVA2.

Conclusions:

  • Digital variance angiography (DVA) offers enhanced CNR and superior image quality in lower limb interventions, independent of the contrast agent.
  • DVA1 is the preferred algorithm due to its comparable or better image quality than DVA2.
  • DVA has the potential to improve interventional decision-making and enable future dose management strategies (radiation/ICM reduction).