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Time and flow parameter extraction in digital angiography: principles and methods.

|August 1, 1985

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Indicator dilution techniques analyze angiograms for blood flow and time measurements. Parametric images derived from digital angiography enable precise regional blood flow calculations.

Area of Science:

Medical Imaging
Biomedical Engineering
Cardiovascular Physiology

Background:

Indicator dilution techniques are crucial for quantitative analysis in angiography.
Digital angiography examines temporal brightness changes in image elements.
Parametric images are generated from functional parameters for detailed analysis.

Purpose of the Study:

To detail methods for quantitative analysis of angiograms using indicator dilution techniques.
To describe the generation and application of parametric images for flow and volume measurements.
To present five time parameters and two depth parameters for regional blood flow calculation.

Main Methods:

Utilizing indicator dilution techniques for time and flow measurements in angiograms.

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Last Updated: Feb 21, 2026

Deep Vascular Imaging in the Eye with Flow-Enhanced Ultrasound

Deep Vascular Imaging in the Eye with Flow-Enhanced Ultrasound

Published on: October 4, 2021

Blood Flow Imaging with Ultrafast Doppler

Blood Flow Imaging with Ultrafast Doppler

Published on: October 14, 2020

Spatial Temporal Analysis of Fieldwise Flow in Microvasculature

Spatial Temporal Analysis of Fieldwise Flow in Microvasculature

Published on: November 18, 2019

Analyzing temporal brightness changes in digital angiography for each picture element.

Developing parametric images, including time and depth parameters, for vascular analysis.

Main Results:

Parametric images enable the evaluation of functional parameters in angiograms.
Vascular segments are defined using time parameters based on blood flow intervals.
Regional blood flow is calculated using computed segment volumes from depth parameter images.

Conclusions:

The described parameters provide a basis for regional blood flow calculation.
Five time and two depth parameters offer versatile tools for various applications.
This approach enhances quantitative analysis in digital angiography for cardiovascular studies.