Angiography Guidance
Angiography Guidance - Related Videos
10:14
Automated Robotic Dispensing Technique for Surface Guidance and Bioprinting of Cells
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Cited by 9 •
2016
This protocol describes a bioprinting methodology using an automated robotic depositing system that incorporates etched topographical guidance cues with the precision deposition of a cell bearing hydrogel bioink. The printed cells are directly delivered to the etched features and are able to sense and orientate with them.
01:17
Time-of-Flight Magnetic Resonance Angiography to Visualize Blood Vasculature
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2025
Position the patient's head inside the radiofrequency, or RF, coil of a magnetic resonance imaging, or MRI, machine.Initiate the time-of-flight magnetic resonance angiography or TOF MRA, a non-invasive technique for visualizing blood vessels.Select a tissue slice for imaging to visualize arteries and veins.Apply an RF pulse to excite the protons within the selected imaging slice. These protons release energy, which is detected as an MR signal.Repeated application of RF pulses saturates the MR...
01:22
Detection of Internal Carotid Artery Narrowing Using Digital Subtraction Angiography
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2025
Position a human patient with internal carotid stenosis, a condition characterized by narrowing of the internal carotid artery, on the imaging table for digital subtraction angiography (DSA). Insert an angiocatheter into the common carotid artery at the fourth cervical vertebra level. Capture a pre-contrast X-ray image to record background structures like bones and soft tissues using X-ray irradiation. Administer an iodine-based contrast medium into the carotid artery. The contrast medium...
09:32
Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging
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Cited by 2 •
2021
Dynamic computed tomography angiography (CTA) imaging provides additional diagnostic value in characterizing aortic endoleaks. This protocol describes a qualitative and quantitative approach using time-attenuation curve analysis to characterize endoleaks. The technique of integrating dynamic CTA imaging with fluoroscopy using 2D-3D image fusion is illustrated for better image guidance during treatment.
10:30
Use of pHluorin to Assess the Dynamics of Axon Guidance Receptors in Cell Culture and in the Chick Embryo
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Cited by 10 •
2014
We describe here the use of a pH-sensitive green fluorescent protein variant, pHluorin, to study the spatio-temporal dynamics of axon guidance receptors trafficking at the cell surface. The pHluorin-tagged receptor is expressed both in cell culture and in vivo, using electroporation of the chick embryo.
FAQs
Contrast material makes the vascular system distinguishable as it moves through the vessels. Imaging captures this movement, allowing clinicians to assess both vessel anatomy and blood flow rather than relying on anatomy alone. Changes in the contrast pathway can help reveal abnormalities such as stenosis, occlusion, or aneurysms and support decisions about where to direct a catheter or device.
Real-time imaging lets clinicians observe catheter position and device advancement while the procedure is underway. This immediate feedback helps align instruments with the relevant vessel anatomy and supports more precise placement during treatment. Because clinicians can connect what they see with the catheter’s location, imaging guidance contributes to safer procedural decisions and more controlled vascular intervention.
Angiography guidance can help identify stenosis, meaning narrowing of a vessel, as well as occlusion, or blockage, and aneurysms. These findings emerge from the relationship between visible vessel anatomy and the movement of contrast through the vascular system. Recognizing the abnormality helps clinicians determine whether further catheter-based treatment, such as angioplasty, stenting, or embolization, may be appropriate.
Anatomical visualization shows the structure of the vessels, while contrast movement provides information about blood flow through that structure. Considering both views gives clinicians a more useful basis for interpreting vascular abnormalities and selecting a response. This combined information supports more accurate decisions than positioning a treatment device without imaging feedback about the surrounding vascular anatomy.
A typical workflow begins with catheter placement in the vascular system, followed by delivery of contrast material. Fluoroscopy or another imaging modality then captures the contrast as it moves through the vessels. Clinicians interpret the resulting anatomy and flow information, use it to guide catheter or device positioning, and proceed with an indicated vascular intervention when appropriate.
The technique is useful when identifying a vascular abnormality is directly connected to a catheter-based treatment. Imaging can guide angioplasty for a narrowed vessel, stent placement to support treatment, or embolization to address a targeted vascular problem. Its value is the ability to carry diagnostic visualization into the same procedure used to position and deploy the treatment device.
Clinicians can evaluate vessel anatomy, observe blood-flow behavior through contrast movement, and identify abnormalities including stenosis, occlusion, and aneurysms. They can also use the images to assess catheter and device position during an intervention. Together, these observations provide procedural information that supports diagnosis, treatment selection, and more accurate execution of vascular care.
Continuous imaging feedback helps clinicians match device placement to the patient’s visible vascular anatomy instead of relying only on indirect guidance. The images also show how contrast moves through the vessels, helping connect treatment decisions with the observed abnormality. This combination supports more precise positioning, better-informed choices, and safer catheter-based procedures such as stenting or embolization.