How to apply the DAZE technique: structured approach to fetal cardiac image optimization

Area of Science:

• Medical Imaging
• Obstetrics and Gynecology
• Fetal Medicine

Background:

• Prenatal detection of congenital heart disease (CHD) remains a significant challenge in routine obstetric practice.
• Missed CHD diagnoses are often linked to suboptimal ultrasound image acquisition and inconsistent application of optimization principles.
• High-quality fetal cardiac assessment necessitates deliberate optimization of technical parameters beyond standard anatomical views.

Purpose of the Study:

• To introduce and describe the DAZE (Depth, Angle, Zoom, Enhancement) technique.
• To provide a systematic and reproducible method for optimizing two-dimensional ultrasound imaging and color Doppler for fetal cardiac assessment.
• To emphasize the importance of technical parameter optimization for improving spatial and temporal resolution in fetal echocardiography.

Main Methods:

• The DAZE technique involves four sequential optimization steps: Depth, Angle, Zoom, and Enhancement.
• 'D': Adjustment of Depth and focal-zone placement.
• 'A': Optimization of sector Angle width and Angle of insonation.
• 'Z': Appropriate Zoom magnification.
• 'E': Enhancement of ultrasound system settings.
• Practical application of each DAZE component is detailed, focusing on optimizing grayscale and color Doppler imaging.

Main Results:

• The DAZE technique provides an organized approach to systematically optimize ultrasound parameters for fetal cardiac imaging.
• Implementation of DAZE aims to improve image quality, including spatial and temporal resolution.
• Enhanced optimization of color Doppler application is a key outcome of the DAZE technique.

Conclusions:

• The DAZE technique offers a structured methodology to enhance the quality of fetal cardiac ultrasound examinations.
• Systematic optimization of ultrasound parameters using DAZE can potentially improve the accuracy of prenatal CHD detection.
• Consistent application of the DAZE technique can lead to more reliable and reproducible fetal echocardiography.