International Workshop on Medical Ultrasound Tomography

Session

Session 2: Imaging and inversion II

Nov 1, 2017, 11:00 AM

Conveners

Session 2: Imaging and inversion II

• Frank Natterer (University of Münster)
• Joost van der Neut (Delft University of Technology)

26. USCT Image Reconstruction: Acceleration using Gauss-Newton Preconditioned Conjugate Gradient

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...

43. 3D time-domain spectral-element ultrasound waveform tomography

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...

62. Joint reconstruction of ultrasound and photoacoustic tomography images

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.