Trainable Joint Bilateral Filters for Enhanced Prediction Stability in
Low-dose CT
- URL: http://arxiv.org/abs/2207.07368v1
- Date: Fri, 15 Jul 2022 09:30:32 GMT
- Title: Trainable Joint Bilateral Filters for Enhanced Prediction Stability in
Low-dose CT
- Authors: Fabian Wagner and Mareike Thies and Felix Denzinger and Mingxuan Gu
and Mayank Patwari and Stefan Ploner and Noah Maul and Laura Pfaff and Yixing
Huang and Andreas Maier
- Abstract summary: Low-dose computed tomography (CT) denoising algorithms aim to enable reduced patient dose in routine CT acquisitions.
Deep learning(DL)-based methods were introduced, outperforming conventional denoising algorithms on this task due to their high model capacity.
We propose a hybrid denoising approach consisting of a set of trainable joint bilateral filters (JBFs) combined with a convolutional DL-based denoising network.
- Score: 7.879949714759592
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Low-dose computed tomography (CT) denoising algorithms aim to enable reduced
patient dose in routine CT acquisitions while maintaining high image quality.
Recently, deep learning~(DL)-based methods were introduced, outperforming
conventional denoising algorithms on this task due to their high model
capacity. However, for the transition of DL-based denoising to clinical
practice, these data-driven approaches must generalize robustly beyond the seen
training data. We, therefore, propose a hybrid denoising approach consisting of
a set of trainable joint bilateral filters (JBFs) combined with a convolutional
DL-based denoising network to predict the guidance image. Our proposed
denoising pipeline combines the high model capacity enabled by DL-based feature
extraction with the reliability of the conventional JBF. The pipeline's ability
to generalize is demonstrated by training on abdomen CT scans without metal
implants and testing on abdomen scans with metal implants as well as on head CT
data. When embedding two well-established DL-based denoisers (RED-CNN/QAE) in
our pipeline, the denoising performance is improved by $10\,\%$/$82\,\%$ (RMSE)
and $3\,\%$/$81\,\%$ (PSNR) in regions containing metal and by $6\,\%$/$78\,\%$
(RMSE) and $2\,\%$/$4\,\%$ (PSNR) on head CT data, compared to the respective
vanilla model. Concluding, the proposed trainable JBFs limit the error bound of
deep neural networks to facilitate the applicability of DL-based denoisers in
low-dose CT pipelines.
Related papers
- WIA-LD2ND: Wavelet-based Image Alignment for Self-supervised Low-Dose CT Denoising [74.14134385961775]
We introduce a novel self-supervised CT image denoising method called WIA-LD2ND, only using NDCT data.
WIA-LD2ND comprises two modules: Wavelet-based Image Alignment (WIA) and Frequency-Aware Multi-scale Loss (FAM)
arXiv Detail & Related papers (2024-03-18T11:20:11Z) - Rotational Augmented Noise2Inverse for Low-dose Computed Tomography
Reconstruction [83.73429628413773]
Supervised deep learning methods have shown the ability to remove noise in images but require accurate ground truth.
We propose a novel self-supervised framework for LDCT, in which ground truth is not required for training the convolutional neural network (CNN)
Numerical and experimental results show that the reconstruction accuracy of N2I with sparse views is degrading while the proposed rotational augmented Noise2Inverse (RAN2I) method keeps better image quality over a different range of sampling angles.
arXiv Detail & Related papers (2023-12-19T22:40:51Z) - On the Benefit of Dual-domain Denoising in a Self-supervised Low-dose CT
Setting [6.450514665591633]
Data-driven image denoising algorithms were proposed to restore image quality in low-dose acquisitions.
We present an end-to-end trainable CT reconstruction pipeline that contains denoising operators in both the projection and the image domain.
arXiv Detail & Related papers (2022-11-02T13:37:59Z) - Self-supervised Physics-based Denoising for Computed Tomography [2.2758845733923687]
Computed Tomography (CT) imposes risk on the patients due to its inherent X-ray radiation.
Lowering the radiation dose reduces the health risks but leads to noisier measurements, which decreases the tissue contrast and causes artifacts in CT images.
Modern deep learning noise suppression methods alleviate the challenge but require low-noise-high-noise CT image pairs for training.
We introduce a new self-supervised approach for CT denoising Noise2NoiseTD-ANM that can be trained without the high-dose CT projection ground truth images.
arXiv Detail & Related papers (2022-11-01T20:58:50Z) - Ultra Low-Parameter Denoising: Trainable Bilateral Filter Layers in
Computed Tomography [7.405782253585339]
This work presents an open-source CT denoising framework based on the idea of bilateral filtering.
We propose a bilateral filter that can be incorporated into a deep learning pipeline and optimized in a purely data-driven way.
Denoising performance is achieved on x-ray microscope bone data (0.7053 and 33.10) and the 2016 Low Dose CT Grand Challenge dataset (0.9674 and 43.07) in terms of SSIM and PSNR.
arXiv Detail & Related papers (2022-01-25T14:33:56Z) - InDuDoNet+: A Model-Driven Interpretable Dual Domain Network for Metal
Artifact Reduction in CT Images [53.4351366246531]
We construct a novel interpretable dual domain network, termed InDuDoNet+, into which CT imaging process is finely embedded.
We analyze the CT values among different tissues, and merge the prior observations into a prior network for our InDuDoNet+, which significantly improve its generalization performance.
arXiv Detail & Related papers (2021-12-23T15:52:37Z) - Differentially private training of neural networks with Langevin
dynamics forcalibrated predictive uncertainty [58.730520380312676]
We show that differentially private gradient descent (DP-SGD) can yield poorly calibrated, overconfident deep learning models.
This represents a serious issue for safety-critical applications, e.g. in medical diagnosis.
arXiv Detail & Related papers (2021-07-09T08:14:45Z) - Controlling False Positive/Negative Rates for Deep-Learning-Based
Prostate Cancer Detection on Multiparametric MR images [58.85481248101611]
We propose a novel PCa detection network that incorporates a lesion-level cost-sensitive loss and an additional slice-level loss based on a lesion-to-slice mapping function.
Our experiments based on 290 clinical patients concludes that 1) The lesion-level FNR was effectively reduced from 0.19 to 0.10 and the lesion-level FPR was reduced from 1.03 to 0.66 by changing the lesion-level cost.
arXiv Detail & Related papers (2021-06-04T09:51:27Z) - No-reference denoising of low-dose CT projections [2.7716102039510564]
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.
The reduction of the radiation dose decreases the risks to the patients but raises the noise level, affecting the quality of the images and their ultimate diagnostic value.
One mitigation option is to consider pairs of low-dose and high-dose CT projections to train a denoising model using deep learning algorithms; however, such pairs are rarely available in practice.
In this paper, we present a new self-supervised method for CT denoising. Unlike existing self-supervised
arXiv Detail & Related papers (2021-02-03T13:51:33Z) - COVI-AgentSim: an Agent-based Model for Evaluating Methods of Digital
Contact Tracing [68.68882022019272]
COVI-AgentSim is an agent-based compartmental simulator based on virology, disease progression, social contact networks, and mobility patterns.
We use COVI-AgentSim to perform cost-adjusted analyses comparing no DCT to: 1) standard binary contact tracing (BCT) that assigns binary recommendations based on binary test results; and 2) a rule-based method for feature-based contact tracing (FCT) that assigns a graded level of recommendation based on diverse individual features.
arXiv Detail & Related papers (2020-10-30T00:47:01Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.