Conveners
Session 2: Imaging and inversion II
- Frank Natterer (University of Münster)
- Joost van der Neut (Delft University of Technology)
Hongjian Wang
(Heidelberg University)
11/1/17, 11:00 AM
Main Track
Oral
Ultrasound transmission tomography offers quantitative characterization of the tissue or materials by their speed of sound and attenuation. Reconstruction of such images is an inverse problem which is solved iteratively based on a forward model of paraxial approximation of the Helmholtz equation and thus is time-consuming. Hence, developing optimizers that decrease this time, in particular...
Christian Boehm
(ETH Zurich)
11/1/17, 11:20 AM
Main Track
Oral
Waveform inversion for ultrasound computed tomography is a promising tool to image the acoustic properties of breast tissue. We present a technique for time-domain 3D acoustic waveform inversion that combines the spectral-element method with source encoding strategies and a quasi-Newton trust-region method. The key objective is to reduce the computational cost of waveform inversion by randomly...
Mark Anastasio
(Washington University in St. Louis)
11/1/17, 11:40 AM
Main Track
Oral
Photoacoustic computed tomography (PACT) is a bioimaging modality that seeks to reconstruct an estimate of the absorbed optical energy density within an object. We propose a joint reconstruction problem in which the speed-of-sound (SOS) distribution is concurrently estimated along with the sought-after absorbed optical energy density from the photoacoustic measurement data.
