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Result : Searchterm 'Angiography' found in 14 terms [] and 98 definitions []
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Searchterm 'Angiography' was also found in the following services: 
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Fe O-BPAInfoSheet: - Contrast Agents - 
Intro, Overview, 
Characteristics, 
Types of, 
etc.
 
Short name: Fe O-BPA, central moiety: Fe3+/Fe2+
An ultrasmall superparamagnetic iron oxide under development (preclin.) as a vascular contrast agent for MR angiography.

See also USPIO.
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Searchterm 'Angiography' was also found in the following services: 
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Radiology  (34) Open this link in a new windowUltrasound  (9) Open this link in a new window
FlowForum -
related threads
 
Flow phenomena are intrinsic processes in the human body. Organs like the heart, the brain or the kidneys need large amounts of blood and the blood flow varies depending on their degree of activity. Magnetic resonance imaging has a high sensitivity to flow and offers accurate, reproducible, and noninvasive methods for the quantification of flow. MRI flow measurements yield information of blood supply of of various vessels and tissues as well as cerebro spinal fluid movement.
Flow can be measured and visualized with different pulse sequences (e.g. phase contrast sequence, cine sequence, time of flight angiography) or contrast enhanced MRI methods (e.g. perfusion imaging, arterial spin labeling).
The blood volume per time (flow) is measured in: cm3/s or ml/min. The blood flow-velocity decreases gradually dependent on the vessel diameter, from approximately 50 cm per second in arteries with a diameter of around 6 mm like the carotids, to 0.3 cm per second in the small arterioles.

Different flow types in human body:
•
Behaves like stationary tissue, the signal intensity depends on T1, T2 and PD = Stagnant flow
•
Flow with consistent velocities across a vessel = Laminar flow
•
Laminar flow passes through a stricture or stenosis (in the center fast flow, near the walls the flow spirals) = Vortex flow
•
Flow at different velocities that fluctuates = Turbulent flow

See also Flow Effects, Flow Artifact, Flow Quantification, Flow Related Enhancement, Flow Encoding, Flow Void, Cerebro Spinal Fluid Pulsation Artifact, Cardiovascular Imaging and Cardiac MRI.
 
Images, Movies, Sliders:
 MVP Parasternal  Open this link in a new window
    

Courtesy of  Robert R. Edelman
 TOF-MRA Circle of Willis Inverted MIP  Open this link in a new window
    

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• View the DATABASE results for 'Flow' (113).Open this link in a new window


• View the NEWS results for 'Flow' (7).Open this link in a new window.
 
Further Reading:
  News & More:
The super-fast MRI scan that could revolutionise heart failure diagnosis
Wednesday, 21 September 2022   by www.eurekalert.org    
MRI Resources 
Safety Products - Homepages - Mobile MRI - MRI Technician and Technologist Schools - Stimulator pool - Equipment
 
Flow Effects
 
Motion of material being imaged, particularly flowing blood, can result in many possible effects in the images.
Fast moving blood produces flow voids, blood flowing in to the outer slices of an imaging volume produces high signals (flow related enhancement, entry slice phenomenon), pulsatile flow creates ghost images of the vessel extending across the image in the phase encoding direction (image misregistration).
Flow-related dephasing occurring when spin isochromats are moving with different velocities in an external gradient field G so that they acquire different phases. When these phases vary by more then 180° within a voxel, substantial spin dephasing results leading to considerable intravascular signal loss.
These effects can be understood as caused by time of flight effects (washout or washin due to motion of nuclei between two consecutive spatially selective RF excitations, repeated in times on the order of, or shorter than the relaxation times of blood) or phase shifts (delay between phase encoding and frequency encoding) that can be acquired by excited spins moving along magnetic field gradients.
The inconsistency of the signal resulting from pulsatile flow can lead to artifacts in the image. The flow effects can also be exploited for MR angiography or flow measurements.

See also Flow Artifact.
 
Images, Movies, Sliders:
 Anatomic MRI of the Knee 1  Open this link in a new window
    
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 Anatomic MRI of the Neck  Open this link in a new window
    
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 PCA-MRA 3D Brain Venography Colored MIP  Open this link in a new window
    

 TOF-MRA Circle of Willis Inverted MIP  Open this link in a new window
    

 
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• View the DATABASE results for 'Flow Effects' (16).Open this link in a new window

 
Further Reading:
  News & More:
Magnetic resonance flow velocity and temperature mapping of a shape memory polymer foam device
Thursday, 31 December 2009   by 7thspace.com    
MRI measure of blood flow over atherosclerotic plaque may detect dangerous plaque
Friday, 5 April 2013   by www.sciencecodex.com    
Searchterm 'Angiography' was also found in the following services: 
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News  (19)  Resources  (26)  Forum  (6)  
 
Gadomer 17InfoSheet: - Contrast Agents - 
Intro, Overview, 
Characteristics, 
Types of, 
etc.MRI Resource Directory:
 - Contrast Agents -
 
Short name: (Gd-DTPA)-17, 24 cascade polymer, generic name: Gadomer-17, 24, central moiety: Gd2+, relaxivity: r1=11.9, B0=1.0 T, r2=16.5, Dose: 0.05 mmol/kg
An intravascular macromolecular MRI contrast agent with positive enhancement under development (Bayer Schering Pharma AG) for MR angiography and tumor differentiation. The synthetic dendrimer with large molecular weight (17kD - limits agent to vascular space) is linked to Gadolinium. The renal excretion is slowed to intermediate molecular size. In MRA a longer lasting venous and arterial enhancement was seen with Gadomer-17 due to the particular pharmacokinetics of this agent.

See also Tumor Specific Agents, and Intravascular Contrast Agents.
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• View the DATABASE results for 'Gadomer 17' (3).Open this link in a new window


• View the NEWS results for 'Gadomer 17' (1).Open this link in a new window.
 
Further Reading:
  News & More:
Combined MR lymphangiography and MR imaging-guided needle localization of sentinel lymph nodes using Gadomer-17.
2002
Searchterm 'Angiography' was also found in the following services: 
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Radiology  (34) Open this link in a new windowUltrasound  (9) Open this link in a new window
Gadovist®InfoSheet: - Contrast Agents - 
Intro, Overview, 
Characteristics, 
Types of, 
etc.MRI Resource Directory:
 - Contrast Agents -
 
Gadovist® is an extracellular, neutral macrocyclic (gadolinium (Gd) complex) MRI contrast agents for central nervous system indications, particularly suited for studies in which high doses are required or advantageous. Gadovist® (also Gadograf) was available in two concentrations, currently only Gadovist® 1.0 is marketed.
The product was approved in Switzerland in 1999 and in Germany in 2000. Gadovist® 1.0 is in USA currently in the drug development and approval process, particularly for magnetic resonance angiography.

WARNING: NEPHROGENIC SYSTEMIC FIBROSIS Gadolinium-based contrast agents increase the risk for nephrogenic systemic fibrosis (NSF) in patients with acute or chronic severe renal insufficiency (glomerular filtration rate less than 30 mL/min/1.73m2), or acute renal insufficiency of any severity due to the hepato-renal syndrome or in the perioperative liver transplantation period.

See also Paramagnetic Contrast Agents and Gadobutrol.
Drug Information and Specification
NAME OF COMPOUND
Gadobutrol, Gd-BT-DO3A
CENTRAL MOIETY
Gd2+
CONTRAST EFFECT
T1, Predominantly positive enhancement
r1=3.6, B0=1.0 T
PHARMACOKINETIC
Intravascular, extracellular, renal excretion
OSMOLALITY
557 and 1603 mosm/kgH2O
CONCENTRATION
1 mol/L
DOSAGE
0.1mmol/kg
PREPARATION
Finished product
INDICATION
Central nervous system / whole body
DEVELOPMENT STAGE
For sale / submit for approval
DISTRIBUTOR
See below
PRESENTATION
Vials of 15, 30 mL
DO NOT RELY ON THE INFORMATION PROVIDED HERE, THEY ARE
NOT A SUBSTITUTE FOR THE ACCOMPANYING PACKAGE INSERT!
Distribution Information
TERRITORY
TRADE NAME
DEVELOPMENT
STAGE
DISTRIBUTOR
USA
Gadovist®
Submit for approval
Japan
Gadovist®
EU
Gadovist®
for sale
Australia
Gadovist®
for sale
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• View the DATABASE results for 'Gadovist®' (5).Open this link in a new window

 
Further Reading:
  Basics:
Important Drug Warning for Gadolinium-Based Contrast Agents
Wednesday, 12 September 2007   by www.ismrm.org    
Gadograf, Gadovist
Friday, 13 April 2007   by www.ema.europa.eu    
  News & More:
EMA's final opinion confirms restrictions on use of linear gadolinium agents in body scans
Friday, 21 July 2017   by www.ema.europa.eu    
FDA Drug Safety Communication: FDA warns that gadolinium-based contrast agents (GBCAs) are retained in the body; requires new class warnings
Tuesday, 19 December 2017   by www.fda.gov    
FDA approves Bayer's Gadavist® (gadobutrol) injection as the first magnetic resonance contrast agent for pediatric patients less than 2 years of age
Monday, 5 January 2015   by www.prnewswire.com    
New data presented at RSNA on use of Bayer's Gadavist® (gadobutrol) injection in children less than 2 years of age
Wednesday, 3 December 2014   by www.prnewswire.com    
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