Multiline 3D beamforming using micro-beamformed datasets for pediatric transesophageal echocardiography

Area of Science:

• Medical Imaging
• Ultrasound Technology
• Pediatric Cardiology

Background:

• No matrix transducers currently exist for 3D transesophageal echocardiography (TEE) in pediatric patients.
• Key challenges include connecting numerous elements to standard ultrasound systems and achieving high volume rates (>200 Hz).

Purpose of the Study:

• To develop and evaluate novel multiline parallel 3D beamforming techniques for pediatric 3D TEE.
• To assess the feasibility of a prototype miniaturized matrix transducer with micro-beamforming for pediatric applications.

Main Methods:

• Proposed two multiline parallel 3D beamforming techniques (µBF25 and µBF169) using micro-beamformed datasets.
• Utilized angle-weighted combination of overlapping sub-volumes to mitigate parallel beamforming artifacts.
• Validated simulation results with experimental data acquired using a Verasonics V1 research ultrasound system.

Main Results:

• µBF25 achieved a volume rate of 300 Hz, and µBF169 achieved 44 Hz.
• Simulated image quality (PSF width, lateral shift invariance, clutter level) for both techniques was comparable to idealized conventional methods.
• Experimental results showed similar PSFs to simulations, with a ~10 dB higher clutter level.

Conclusions:

• The proposed multiline 3D beamforming techniques are promising for real-time pediatric 3D TEE.
• The prototype matrix transducer with micro-beamforming addresses critical challenges in pediatric TEE.
• Further optimization may be needed to reduce experimental clutter levels for enhanced diagnostic accuracy.