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Common carotid intima-media thickness: does it matter how it is measured
C Cipriano1, J Constans, P Gosse
1Service of Internal Medicine and Vascular Pathology St. André Hospital, Bordeaux, France.
Summary
Comparing intima media thickness (IMT) software revealed significant differences. Using the same software for repeated vascular risk assessments is crucial due to variations in measurements between different tools.
Area of Science:
- Cardiology
- Medical Imaging
- Biomedical Engineering
Background:
- Intima media thickness (IMT) is a key predictor of cardiovascular events.
- Standardization of IMT measurement methods and software is lacking.
- Software variability may impact the reliability of IMT data in clinical practice.
Purpose of the Study:
- To compare the performance of two widely used semi-automatic software packages for IMT measurement.
- To assess the impact of software choice on IMT measurements.
- To highlight the need for standardization in IMT analysis.
Main Methods:
- Intima media thickness (IMT) was measured on the common carotid arteries of 97 patients.
- Standardized measurement conditions were applied.
- Two software packages, Metris and Iôdp, were used for semi-automatic IMT analysis.
Main Results:
- No significant intra-investigator variability was observed with either software.
- The Iôdp software yielded a greater number of measurable points compared to Metris.
- A statistically significant difference in IMT measurements was found, with Iôdp measuring lower IMT values (mean difference 0.066 mm on the right side).
Conclusions:
- Software choice significantly influences IMT measurements, affecting vascular risk assessment.
- Consistent use of the same software is essential for serial IMT measurements in individual patients.
- Urgent standardization of IMT measurement methodologies is required for reliable clinical application and data extrapolation.