Implementation, validation of Delay and Sum Imaging with I/Q demodulation

Forschungsthema/Bereich: Medizinische Ultraschall-Bildgebung
Typ der Abschlussarbeit: Bachelor / Master
Startzeitpunkt: 01.09.2026
Bewerbungsschluss: 31.08.2026
Dauer der Arbeit: 6 months

Beschreibung

3D Ultrasound Tomography (USCT) reflection images are currently reconstructed using Synthetic Aperture Focusing Technique (SAFT). Due to large uncertainties in sound speed, manufacturing precision etc. we typically apply a signal detection and broadened pulses to reduce the SAFT resolution. Delay-and-Sum imaging avoids this signal detection and preserves speckle patterns. Yet, for reconstruction this requires a high-resolution grid due to the high frequencies used in the current 3D USCT system, which results in a high computational burden. I/Q demodulation on signal level would result in lower frequency signal and therefore allow reducing the resolution of the computational grid in the reconstruction. In this thesis the IQ demodulation should be implemented into the existing Delay-and-sum reconstruction implementation. Afterwards the method should be validated with simulated data and compared against Delay-and-Sum imaging without I/Q demodulation. Finally the method should be applied to experimental data and qualitatively compared to existing reconstruction methods

Voraussetzung

Voraussetzungen an Studierende

Interest in medical imaging, ultrasound, (Matlab) programming

Studiengangsbereiche

Ingenieurwissenschaften
Elektrotechnik & Informationstechnik
Biomedical Engineering
Electrical Engineering and Information Technology
Medizintechnik

Betreuung

Titel, Vorname, Name: Dr. Torsten Hopp and PD Dr. Nicole Ruiter
Organisationseinheit: IPE
E-Mail Adresse: nicole.ruiter@kit.edu
Link zur eigenen Homepage/Personenseite: Website

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