Search Results for author: Alexey Chernyavskiy

Found 6 papers, 2 papers with code

Self-supervised Physics-based Denoising for Computed Tomography

no code implementations1 Nov 2022 Elvira Zainulina, Alexey Chernyavskiy, Dmitry V. Dylov

Computed Tomography (CT) imposes risk on the patients due to its inherent X-ray radiation, stimulating the development of low-dose CT (LDCT) imaging methods.

Computed Tomography (CT) Denoising

Medical image segmentation with imperfect 3D bounding boxes

no code implementations6 Aug 2021 Ekaterina Redekop, Alexey Chernyavskiy

While current weakly-supervised approaches that use 2D bounding boxes as weak labels can be applied to medical image segmentation, we show that their success is limited in cases when the assumption about the tightness of the bounding boxes breaks.

Image Segmentation Medical Image Segmentation +3

Anatomy of Domain Shift Impact on U-Net Layers in MRI Segmentation

1 code implementation10 Jul 2021 Ivan Zakazov, Boris Shirokikh, Alexey Chernyavskiy, Mikhail Belyaev

Domain Adaptation (DA) methods are widely used in medical image segmentation tasks to tackle the problem of differently distributed train (source) and test (target) data.

Anatomy Domain Generalization +3

Uncertainty-based method for improving poorly labeled segmentation datasets

no code implementations16 Feb 2021 Ekaterina Redekop, Alexey Chernyavskiy

The success of modern deep learning algorithms for image segmentation heavily depends on the availability of large datasets with clean pixel-level annotations (masks), where the objects of interest are accurately delineated.

Image Segmentation Segmentation +1

No-reference denoising of low-dose CT projections

no code implementations3 Feb 2021 Elvira Zainulina, Alexey Chernyavskiy, Dmitry V. Dylov

Low-dose computed tomography (LDCT) became a clear trend in radiology with an aspiration to refrain from delivering excessive X-ray radiation to the patients.

Denoising

First U-Net Layers Contain More Domain Specific Information Than The Last Ones

1 code implementation17 Aug 2020 Boris Shirokikh, Ivan Zakazov, Alexey Chernyavskiy, Irina Fedulova, Mikhail Belyaev

Our results demonstrate that 1) domain-shift may deteriorate the quality even for a simple brain extraction segmentation task (surface Dice Score drops from 0. 85-0. 89 even to 0. 09); 2) fine-tuning of the first layers significantly outperforms fine-tuning of the last layers in almost all supervised domain adaptation setups.

Domain Adaptation

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