Results 21 to 30 of about 99,920 (253)

Automated computer-assisted detection system for cerebral aneurysms in time-of-flight magnetic resonance angiography using fully convolutional network

BioMedical Engineering OnLine, 2020
Background As the rupture of cerebral aneurysm may lead to fatal results, early detection of unruptured aneurysms may save lives. At present, the contrast-unenhanced time-of-flight magnetic resonance angiography is one of the most commonly used methods ...
Geng Chen, Xia Wei, Huang Lei, Yang Liqin, Li Yuxin, Dai Yakang, Geng Daoying   +6 more
doaj   +1 more source

Standardization of MRI Studies Using an Automatic Magnetic Resonance Contrast Agent Injector

Вестник рентгенологии и радиологии, 2020
The reproducibility of the conditions used during scanning, especially in MRI, is one of the important tasks in radiodiagnosis to obtain standardized data and to correctly assess them over time in the same patient.
V. A. Fokin
doaj   +1 more source

Bolus characteristics based on Magnetic Resonance Angiography

BioMedical Engineering OnLine, 2006
Background A detailed contrast bolus propagation model is essential for optimizing bolus-chasing Computed Tomography Angiography (CTA). Bolus characteristics were studied using bolus-timing datasets from Magnetic Resonance Angiography (MRA) for adaptive ...
Bi Xiaoming, Li Debiao, Vannier Michael, Potts Tom, Bai Henri, McCabe Robert, Sharafuddin Melhem J, Stolpen Alan, Cai Zhijun, Bennett James, Golzarian Jafar, Sun Shiliang, Wang Ge, Bai Er-Wei   +13 more
doaj   +1 more source

Fenestration of the posterior cerebral artery P1-P2 junction: A case report

Radiology Case Reports
Fenestration is a rare anatomical variation in the posterior cerebral artery. To the best of our knowledge, there are few reports of fenestrations at the posterior cerebral artery P1-P2 junction.
Hideki Endo, MD, PhD, Hirohiko Nakamura, MD, PhD   +1 more
doaj   +1 more source

Changes in Immune‐Inflammation Status and Prognosis in Pregnancy‐Related Cerebral Venous Thrombosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Distinguishing pathological changes from physiological adaptations in pregnancy‐related cerebral venous thrombosis (CVT) is clinically challenging. This study aimed to characterize coagulation, immune‐inflammation, and dehydration status in these patients and assess their prognostic value.
Xiaoming Zhang, Zilin Xu, Ran Duan, Chunxiao Lu, Da Zhou, Chen Zhou, Ran Meng, Xunming Ji   +7 more
wiley   +1 more source

Cross‐Scale Hierarchical Targeted Delivery System Based on Small‐Scale Magnetic Robots

Advanced Robotics Research, EarlyView.
This article reviews a cross‐scale hierarchical targeted delivery system that integrates magnetic continuum robots and magnetic microrobots. By combining rapid long‐range navigation with precise microscale targeting, the system overcomes key limitations of single‐scale approaches.
Junjian Zhou, Zhiqiang Chen, Yuanbiao Ma, Zhiqiang Tang, Qianqian Wang   +4 more
wiley   +1 more source

Guidelines for imaging in Neuro-ophthalmic and Orbital disease

Kerala Journal of Ophthalmology, 2016
Neuroimaging has progressed from plain X-ray to magnetic resonance imaging, noninvasive angiography, and special sequences. Utilization of the appropriate investigation can save the sight and sometimes life of the patient.
Thomas A Varghese, Anusha Varghese
doaj   +1 more source

Magnetic Resonance Angiography of the Aorta

Annals of Vascular Diseases, 2011
Magnetic resonance angiography (MRA) is capable of imaging arteries in the half to whole body by a single acquisition without a nephrotoxic contrast medium, and acquired images can be reconstructed into a specific cross-sectional view in an arbitrary directions.
Takehara, Yasuo, Yamashita, Shuhei, Sakahara, Harumi, Masui, Takayuki, Isoda, Haruo   +4 more
openaire   +3 more sources

Engineering Ultrastable Intrinsic Radicals: Graphene Quantum Dots With NIR‐II Emission for Dynamic Deep‐Tissue Bioimaging

Advanced Science, EarlyView.
Stable radicals are attractive for photonic and quantum information technologies but are often limited by instability. We stabilize intrinsic radicals in graphene quantum dots via 2D polymerization of perylene derivatives, where bilayer defect confinement suppresses quenching (100–500 K).
Qin Xu, Yijie Hou, Bingzhe Wang, Tesen Zhang, Yupeng Liu, Shuaiqi Li, Maohua Chen, Guichuan Xing, Dongbo Guo, Songnan Qu   +9 more
wiley   +1 more source

Modular Metamaterials for Adaptable MRI Signal Control: Combining Dipole Array With a New Hexagon‐Based Artificial Dielectrics

Advanced Science, EarlyView.
A flexible, hexagonally packed artificial dielectric providing a wide range of effective permittivities (εr ≈ 30–1400) without lumped elements was developed for clinical and ultra‐high‐field MRI. Combined with modular passive‐dipole arrays, the system enables adaptable RF field shaping through electric‐ and magnetic‐dipole tuning.
Santosh Kumar Maurya, Ilan Goldberg, Rita Schmidt   +2 more
wiley   +1 more source