Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Diffuse ultrasound computed tomography for medical imaging   An alternative approach to ultrasound computed tomography (USCT) for medical
imaging is proposed, with the intent to (i) shorten acquisition time for
devices with a large number of emitters, (ii) eliminate the calibration step,
and (iii) suppress instrument noise. Inspired by seismic ambient field
interferometry, the method rests on the active excitation of diffuse ultrasonic
wavefields and the extraction of deterministic travel time information by
inter-station correlation. To reduce stochastic errors and accelerate
convergence, ensemble interferograms are obtained by phase-weighted stacking of
observed and computed correlograms, generated with identical realizations of
random sources. Mimicking a breast imaging setup, the accuracy of the travel
time measurements as a function of the number of emitters and random
realizations can be assessed both analytically and with spectral-element
simulations for realistic breast phantoms. The results warrant tomographic
reconstructions with straight- or bent-ray approaches, where the effect of
inherent stochastic fluctuations can be made significantly smaller than the
effect of subjective choices on regularisation. This work constitutes a first
conceptual study and a necessary prelude to future implementations.

25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex