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Flow measurements with a high-speed computed tomography scanner.

W Jaschke, R G Gould, P A Assimakopoulos

Medical Physics

|March 1, 1987

Summary

High-speed computed tomography (CT) accurately measures blood flow using various methods in phantoms. This technology shows promise for flow measurements in experimental animals and patients.

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Area of Science:

Medical Imaging
Biomedical Engineering
Physiology

Background:

Accurate measurement of blood flow is crucial for diagnosing and managing various medical conditions.
Traditional methods for flow measurement can be invasive or provide limited spatial and temporal resolution.
Advancements in imaging technology are needed to improve the accuracy and efficiency of flow quantification.

Purpose of the Study:

To evaluate the accuracy of high-speed computed tomography (CT) for measuring flow in a simulated tissue and vessel phantom.
To compare different calculation methods based on the Stewart-Hamilton equation and Sapirstein principle for flow assessment using high-speed CT data.
To determine the feasibility of high-speed CT for quantitative flow measurements in preclinical and clinical settings.

Main Methods:

A high-speed CT scanner (50 ms scan time) was utilized to image a phantom simulating tissues and vessels.
Iodinated contrast medium was injected, and the phantom was scanned at up to 2 images/s.
Time-density data from inlet, outlet, and tissue-equivalent regions were analyzed using gamma-variate curve fitting.

Main Results:

High-speed CT demonstrated accurate flow measurements across multiple calculation methods, including the Stewart-Hamilton equation and Sapirstein principle modifications.
Comparison with actual flow rates assessed by timed sampling confirmed the reliability of the CT-based measurements.
The study successfully validated the use of high-speed CT for quantitative flow assessment in a controlled environment.

Conclusions:

High-speed CT is a viable and accurate tool for quantitative flow measurements.
The technology holds significant potential for application in experimental animal studies and human clinical practice.
Further investigation into the limitations of each specific technique is necessary for optimal clinical implementation.

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