Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Zero-Shot Domain Adaptation in CT Segmentation by Filtered Back
  Projection Augmentation   Domain shift is one of the most salient challenges in medical computer
vision. Due to immense variability in scanners' parameters and imaging
protocols, even images obtained from the same person and the same scanner could
differ significantly. We address variability in computed tomography (CT) images
caused by different convolution kernels used in the reconstruction process, the
critical domain shift factor in CT. The choice of a convolution kernel affects
pixels' granularity, image smoothness, and noise level. We analyze a dataset of
paired CT images, where smooth and sharp images were reconstructed from the
same sinograms with different kernels, thus providing identical anatomy but
different style. Though identical predictions are desired, we show that the
consistency, measured as the average Dice between predictions on pairs, is just
0.54. We propose Filtered Back-Projection Augmentation (FBPAug), a simple and
surprisingly efficient approach to augment CT images in sinogram space
emulating reconstruction with different kernels. We apply the proposed method
in a zero-shot domain adaptation setup and show that the consistency boosts
from 0.54 to 0.92 outperforming other augmentation approaches. Neither specific
preparation of source domain data nor target domain data is required, so our
publicly released FBPAug can be used as a plug-and-play module for zero-shot
domain adaptation in any CT-based task.

21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph