The Avaibility of Strain Elastography in a Hydatid Cyst - Interobserver Study

Area of Science:

• Medical Imaging
• Diagnostic Ultrasound
• Parasitology

Background:

• Hydatid cyst (HC) diagnosis relies on imaging, with ultrasound elastography (USE) emerging as a promising technique.
• Differentiating HC types is crucial for treatment and prognosis, but current methods have limitations.

Purpose of the Study:

• To evaluate the efficacy of ultrasound elastography in differentiating hydatid cyst (HC) types.
• To assess the impact of region of interest (ROI) size (4 mm vs. 8 mm) and interobserver variability on HC elastography measurements.

Main Methods:

• Patients with hydatid cysts (HC) underwent ultrasound elastography (USE).
• Strain index (SI) was calculated using two different ROI sizes (4 mm and 8 mm) by two independent radiologists.
• Statistical analyses were performed to assess interobserver agreement and correlation between SI, HC types, and ROI size.

Main Results:

• No significant difference in HC strain index (SI) was observed between the two radiologists or between the 4-mm and 8-mm ROI sizes.
• No statistically significant difference was found in SI values among different HC types when analyzed by interobservers or different ROI sizes.
• The highest correlation between HC types and ROI sizes was observed with a 4-mm ROI.

Conclusions:

• Ultrasound elastography (USE) is an objective technique for HC assessment, showing no significant interobserver variability in SI values.
• While a 4-mm ROI demonstrated reliable correlation between SI and HC types, USE is not currently appropriate for differentiating specific HC types.