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[DSA parametric imaging--a research on organs blood flow perfusion]
Zhonghua Fang She Xue Za Zhi Chinese Journal of Radiology
|October 1, 1989
Summary
This study shows that DSA parametric imaging accurately measures organ blood flow in animal models. "Peak height" is a key indicator, unlike time-based parameters, for assessing regional blood flow changes.
Area of Science:
- Medical Imaging
- Physiology
- Biomedical Engineering
Background:
- Assessing organ blood flow is crucial for diagnosing and managing various diseases.
- Digital Subtraction Angiography (DSA) parametric imaging offers potential for quantitative blood flow assessment.
- Limitations exist in current DSA techniques for precise regional blood flow evaluation.
Purpose of the Study:
- To evaluate the efficacy of DSA parametric imaging in quantitatively assessing organ blood flow.
- To establish reliable animal models for studying kidney, brain, and lung perfusion.
- To identify sensitive parameters for reflecting quantitative changes in regional blood flow.
Main Methods:
- Development of a gradient stenotic vessel model for kidney and brain blood flow studies.
- Implementation of a balloon embolization model for lung blood flow research.
- Utilizing DSA parametric imaging to analyze blood flow dynamics in created organ models.
Main Results:
- The developed animal models accurately reflected quantitative changes in organ blood flow perfusion.
- "Peak height" emerged as a sensitive parameter for quantifying regional blood flow.
- Time-based parameters (Tmax, 1/2 Tmax) demonstrated limited sensitivity in reflecting blood flow changes.
Conclusions:
- DSA parametric imaging, particularly using the "peak height" parameter, can accurately assess quantitative changes in organ blood flow.
- The experimental models provide a foundation for applying DSA parametric imaging in human studies.
- Further research is warranted to refine DSA parametric imaging for clinical applications in organ perfusion assessment.