Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies

Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies

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...

Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

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...

Imaging Studies VII: Vascular Imaging

Imaging Studies VII: Vascular Imaging

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...

Radiological Investigation III: Pulmonary Angiogram and PET Scan

Radiological Investigation III: Pulmonary Angiogram and PET Scan

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.
Pulmonary Angiogram
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...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Efficiency in radiation protection of a novel exoskeleton-based interventional radiology apron and correlation with conventional aprons.

European journal of radiology·2025

Same author

Forearm elevation impairs local static handgrip endurance likely through reduction in vascular conductance and perfusion pressure: revisiting Rohmert's curve.

Scientific reports·2025

Same author

Developing a Clinical Service in Interventional Radiology: Results from the 2024 CIRSE Clinical Practice Survey.

Cardiovascular and interventional radiology·2024

Same author

Occupational orthopedic problems and its relation to personal radiation protection in interventional radiology.

European journal of radiology·2024

Same author

FLT3-directed UniCAR T-cell therapy of acute myeloid leukaemia.

British journal of haematology·2023

Same author

Physical strain while wearing personal radiation protection systems in interventional radiology.

PloS one·2022

Search research articles

Related Experiment Video

Updated: Dec 2, 2025

Improved Registration of 3D CT Angiography with X-ray Fluoroscopy for Image Fusion During Transcatheter Aortic Valve Implantation

Improved Registration of 3D CT Angiography with X-ray Fluoroscopy for Image Fusion During Transcatheter Aortic Valve Implantation

Published on: June 3, 2018

Digital Variance Angiography in Lower-Limb Angiography with Metal Implants.

M B Bastian¹, A M König¹, S Viniol¹

¹Department of Diagnostic and Interventional Radiology, University Hospital Marburg, Philipps University of Marburg, Baldingerstrasse 1, 35043, Marburg, Germany.

Cardiovascular and Interventional Radiology

|November 4, 2020

Summary

This summary is machine-generated.

Digital variance angiography (DVA) significantly improves lower-limb angiography image quality in patients with metal implants. This advanced technique offers better contrast-to-noise ratio (CNR) and visual assessment compared to digital subtraction angiography (DSA).

Keywords:

Automated exposure control Contrast-to-noise ratio Digital variance angiography Metal implants

More Related Videos

Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences

Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences

Published on: May 17, 2018

Author Spotlight: Improved Imaging for Neovascular Development in Congenital Heart Disease Research

Author Spotlight: Improved Imaging for Neovascular Development in Congenital Heart Disease Research

Published on: April 26, 2024

Related Experiment Videos

Last Updated: Dec 2, 2025

Improved Registration of 3D CT Angiography with X-ray Fluoroscopy for Image Fusion During Transcatheter Aortic Valve Implantation

Improved Registration of 3D CT Angiography with X-ray Fluoroscopy for Image Fusion During Transcatheter Aortic Valve Implantation

Published on: June 3, 2018

Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences

Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences

Published on: May 17, 2018

Author Spotlight: Improved Imaging for Neovascular Development in Congenital Heart Disease Research

Author Spotlight: Improved Imaging for Neovascular Development in Congenital Heart Disease Research

Published on: April 26, 2024

Area of Science:

Radiology
Medical Imaging
Interventional Cardiology

Background:

Metal implants in patients can degrade angiographic image quality due to automated beam adjustments.
Digital subtraction angiography (DSA) is the standard but can be affected by artifacts from implants.
Digital variance angiography (DVA) has shown potential for superior image quality and contrast-to-noise ratio (CNR).

Purpose of the Study:

To evaluate if DVA can overcome the image quality reduction caused by metal implants in lower-limb angiographies.
To compare the effectiveness of DVA versus DSA in the presence of metallic artifacts.
To assess the impact of DVA on contrast-to-noise ratio (CNR) and overall image quality.

Main Methods:

Retrospective analysis of 85 lower-limb iodine contrast angiograms from 12 patients with metal implants.
Processing of angiograms using DVA and comparison with standard DSA.
Objective measurement of CNR and subjective evaluation of image quality by three experienced radiologists using Likert scales and paired comparisons.

Main Results:

DVA demonstrated a median CNR ratio (CNR_DVA/CNR_DSA) of 1.84, indicating significantly higher CNR.
Paired comparisons showed 84.5% preference for DVA images, with high interrater agreement (83.2%).
Mean image quality scores were significantly higher for DVA (4.43) compared to DSA (3.64).

Conclusions:

DVA significantly enhances image quality in lower-limb angiography when metal implants are present.
The improved CNR with DVA suggests potential for reduced radiation exposure in such procedures.
DVA represents a promising alternative to DSA for improving imaging in complex patient populations with implants.