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The paper considers an inverse problem of reconstructing the spatially distributed complex dielectric permittivity function using backscattered data of the electric field in the frequency domain. We develop iterative algorithm for…

医学物理 · 物理学 2024-10-29 Larisa Beilina , Anders Eriksson , Noora Neittaanmäki

We report the growth of thickness-controlled rotationally faulted multilayer graphene (rf-MLG) on Ni foils by low-pressure chemical vapor deposition and their characterization by micro-Raman spectroscopy. The surface morphology and…

材料科学 · 物理学 2018-09-25 H. Kato , N. Itagaki , H. J. Im

Raman spectroscopy is an integral part of graphene research. It is used to determine the number and orientation of layers, the quality and types of edge, and the effects of perturbations, such as electric and magnetic fields, strain,…

材料科学 · 物理学 2015-06-16 Andrea C. Ferrari , Denis M. Basko

Deep learning methods for brain tumor segmentation are typically trained in an ad hoc fashion on all available data. Brain tumors are tremendously heterogeneous in image appearance and labeled training data is limited. We argue that…

图像与视频处理 · 电气工程与系统科学 2019-07-31 Raphael Meier , Michael Rebsamen , Urspeter Knecht , Mauricio Reyes , Roland Wiest , Richard McKinley

Gliomas are the most common malignant brain tumors that are treated with chemoradiotherapy and surgery. Magnetic Resonance Imaging (MRI) is used by radiotherapists to manually segment brain lesions and to observe their development…

图像与视频处理 · 电气工程与系统科学 2020-11-30 Jonas Wacker , Marcelo Ladeira , José Eduardo Vaz Nascimento

Deep Learning is the newest and the current trend of the machine learning field that paid a lot of the researchers' attention in the recent few years. As a proven powerful machine learning tool, deep learning was widely used in several…

图像与视频处理 · 电气工程与系统科学 2020-01-27 Ali Mohammad Alqudah , Hiam Alquraan , Isam Abu Qasmieh , Amin Alqudah , Wafaa Al-Sharu

Glioma, a prevalent and heterogeneous tumor originating from the glial cells, can be differentiated as Low Grade Glioma (LGG) and High Grade Glioma (HGG) according to World Health Organization's norms. Classifying gliomas is essential for…

计算机视觉与模式识别 · 计算机科学 2025-03-03 Kiranmayee Janardhan , Christy Bobby Thomas

Surface enhanced Raman spectra from molecules (bipyridyl ethylene) adsorbed on gold dumbells are observed to become increasingly asymmetric (Fano-like) at higher incident light intensity. The electronic temperature (inferred from the…

介观与纳米尺度物理 · 物理学 2016-01-12 S. Dey , M. Banik , E. Hulkko , K. Rodriguez , V. A. Apkarian , M. Galperin , A. Nitzan

Brain tumours are masses of abnormal cells that can grow in an uncontrolled way in the brain. There are different types of malignant brain tumours. Gliomas are malignant brain tumours that grow from glial cells and are identified as…

Gliomas, the most prevalent primary brain tumors, require precise segmentation for diagnosis and treatment planning. However, this task poses significant challenges, particularly in the African population, were limited access to…

图像与视频处理 · 电气工程与系统科学 2023-12-20 Mohannad Barakat , Noha Magdy , Jjuuko George William , Ethel Phiri , Raymond Confidence , Dong Zhang , Udunna C Anazodo

Raman scattering spectroscopy is widely used as an analytical technique in various fields, but its measurement process tends to be slow due to the low scattering cross-section. In the last decade, various broadband coherent Raman scattering…

光学 · 物理学 2025-05-06 Takuma Nakamura , Kazuki Hashimoto , Takuro Ideguchi

Gliomas are aggressive brain tumors that infiltrate surrounding tissue beyond the visible tumor margins observed on Magnetic Resonance Imaging (MRI). Predicting the spatial extent of this infiltration is essential for surgical planning and…

计算机视觉与模式识别 · 计算机科学 2026-05-05 S M Asif Hossain , Shruti Kshirsagar

Stimulated low-frequency Raman scattering can give essential information about the elastic properties of different nanoparticles systems, in particular, biological nanostructures. In the present study, low-frequency vibrational modes in…

Uncontrolled cell division in the brain is what gives rise to brain tumors. If the tumor size increases by more than half, there is little hope for the patient's recovery. This emphasizes the need of rapid and precise brain tumor diagnosis.…

图像与视频处理 · 电气工程与系统科学 2025-03-11 Plabon Paul , Md. Nazmul Islam , Fazle Rafsani , Pegah Khorasani , Shovito Barua Soumma

Brain tumors are abnormalities that can severely impact a patient's health, leading to life-threatening conditions such as cancer. These can result in various debilitating effects, including neurological issues, cognitive impairment, motor…

图像与视频处理 · 电气工程与系统科学 2024-09-04 Pandiyaraju V , Shravan Venkatraman , Abeshek A , Pavan Kumar S , Aravintakshan S A

Raman spectroscopy is a powerful and non-invasive method for analysis of chemicals and detection of unknown substances. However, Raman signal is so weak that background noise can distort the actual Raman signal. These baseline shifts that…

信号处理 · 电气工程与系统科学 2021-04-28 M. Hamed Mozaffari , Li-Lin Tay

Raman spectroscopy's capability to provide meaningful composition predictions is heavily reliant on a pre-processing step to remove insignificant spectral variation. This is crucial in biofluid analysis. Widespread adoption of diagnostics…

信号处理 · 电气工程与系统科学 2019-04-05 Emily E Storey , Amr S. Helmy

GBM (Glioblastoma multiforme) is the most aggressive type of brain tumor in adults that has a short survival rate even after aggressive treatment with surgery and radiation therapy. The changes on magnetic resonance imaging (MRI) for…

图像与视频处理 · 电气工程与系统科学 2023-06-07 M. S. Sadique , W. Farzana , A. Temtam , E. Lappinen , A. Vossough , K. M. Iftekharuddin

Raman spectroscopic studies of graphene have attracted much interest. The G-band Raman intensity of a single layer graphene on Si substrate with 300 nm SiO2 capping layer is surprisingly strong and is comparable to that of bulk graphite. To…

材料科学 · 物理学 2009-11-13 Yingying Wang , Zhenhua Ni , Zexiang Shen , Haomin Wang , Yihong Wu

The concept of tumor field effect implies that cancer is a systemic disease with its impact way beyond the visible tumor confines. For instance, in Glioblastoma (GBM), an aggressive brain tumor, the increase in intracranial pressure due to…