Effectiveness of low-tube current for reducing radiation dose in cerebral CT perfusion

Tian, Chao; Yang, Tianhao; Fu, Le-jun; Song, Junqiang

doi:10.5114/aoms/122209

Cited by 1 publication

(1 citation statement)

References 22 publications

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“…Therefore, procedures have been developed to manage CT dose under the principle of "as low as reasonably achievable" (also known as ALARA). Management or reduction of X-ray CT radiation dose is possible via a variety of strategies [3,4], such as reduction of radiation dose by imaging with a low tube current or potential [5,6], or development of dual-source X-ray imaging technology [7]. However, imaging with a low tube current increases image noise and artifacts.…”

Section: Introductionmentioning

confidence: 99%

PARS-NET: a novel deep learning framework using parallel residual conventional neural networks for sparse-view CT reconstruction

Khodajou-Chokami

Hosseini

2022

J. Inst.

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Sparse-view computed tomography (CT) is recently proposed as a promising method to speed up data acquisition and alleviate the issue of CT high dose delivery to the patients. However, traditional reconstruction algorithms are time-consuming and suffer from image degradation when faced with sparse-view data. To address this problem, we propose a new framework based on deep learning (DL) that can quickly produce high-quality CT images from sparsely sampled projections and is able for clinical use. Our DL-based proposed model is based on the convolution, and residual neural networks in a parallel manner, named the parallel residual neural network (PARS-Net). Besides, our proposed PARS-Net model benefits from a loss based on the geodesic distance to effectively reflect image structures. Experiments have been performed on the combination of two large-scale CT datasets consisting of CT images of whole-body patients for different sparse projection views including 120, 60, and 30 views. Our experimental results show that PARS-Net is 4–5 times faster than the state-of-the-art DL-based models, with fewer memory requirements, better performance in other objective quality evaluations, and improved visual quality. Results showed that our PARS-Net model was superior to the latest methods, demonstrating the feasibility of using this model for high-quality CT image reconstruction from sparsely sampled projections.

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