Results 111 to 120 of about 989,563 (206)

Design and evaluation of a compound acoustic lens for photoacoustic computed tomography

Biomedical Optics Express, 2017
In photoacoustic computed tomography, the limited directivity of the detectors may cause deformation of off-center targets and lead to an imbalanced resolution in the imaging area. To improve the directivity of the acoustic detectors, several negative acoustic lenses have been proposed.
Shirui, Yang, Wei, Qin, Heng, Guo, Tian, Jin, Na, Huang, Ming, He, Lei, Xi   +6 more
openaire   +2 more sources

Extracellular vesicles in pharmacology: Innovations in drug delivery and therapeutic applications in cancer

British Journal of Pharmacology, EarlyView.
Extracellular vesicles (EVs) are a diverse population of membrane nanoparticles secreted by nearly all cell types, playing a key role in intercellular communication by transferring bioactive macromolecular cargo. In cancer, EVs shape both the local tumour microenvironment and distant premetastatic niches.
Evangelia Pantazaka, Georgios Sivvas, Evangelia Papadimitriou, Constantinos M. Mikelis   +3 more
wiley   +1 more source

Imprint Cytology Improves Accuracy of Computed Tomography-Guided Percutaneous Transthoracic Needle Biopsy

, 2009
The aim of the present study was to investigate whether imprint cytology can improve the diagnostic accuracy of computed tomography- guided transthoracic core biopsy.
CHANG, YEUN-CHUNG;YU, CHONG-JEN;LEE, WEN-JENG;KUO, SOW-HSONG;HSIAO, CHENG-HSIANG;JAN, I-SHIOW;HU, FU-CHANG;LIU, HON-MAN;CHAN, WING-KAI;YANG, PAN-CHYR, 張允中;余忠仁;李文正;郭壽雄;蕭正祥;詹一秀;胡賦強;廖漢文;陳榮楷;楊泮池   +1 more
core   +1 more source

Systematic review of the clinical effectiveness and cost-effectiveness of 64-slice or higher computed tomography angiography as an alternative to invasive coronary angiography in the investigation of coronary artery disease [PDF]

, 2008
Objectives: To assess the clinical effectiveness and cost-effectiveness, in different patient groups, of the use of 64-slice or higher computed tomography (CT) angiography, instead of invasive coronary angiography (CA), for diagnosing people with ...
Cummins, E., Fraser, Cynthia Mary, N Waugh, Cook, J., Cook, Jonathan Alistair, Fraser, C., S Walker, Cummins, E. (Ewen), E Cummins, Mowatt, G., Walker, S., Jia, Xueli, Waugh, Norman, C Fraser, G Mowatt, G Hillis, J Cook, Jian, X., Hillis, Graham S., X Jia, Waugh, N., Mowatt, Graham   +21 more
core   +1 more source

Quantitative oximetry with photoacoustic computed tomography: Principles, progress, and prospects

Journal of Innovative Optical Health Sciences
Photoacoustic computed tomography (PACT) is an emerging biomedical imaging modality that uniquely combines high spatial resolution with deep penetration, holding great promise for noninvasive mapping of tissue oxygen saturation (sO2) — a critical ...
Xingyang Liu, Chuhua Wu, Songde Liu, Chenlong Zhu, Rongkang Gao, Cheng Ma, Chao Tian   +6 more
doaj   +1 more source

Understanding extracellular vesicle biology, isolation, and characterization: The theory of EV‐erything

Periodontology 2000, EarlyView.
Abstract Background Extracellular vesicles (EVs), especially exosomes, are nanoparticles increasingly recognized as key regulators of intercellular communication in both physiological and pathological aspects. Despite rapid progress, inconsistencies in nomenclature, isolation, and characterization continue to restrict translational advancement.
Paras Ahmad, Nima Farshidfar, Nathan E. Estrin, Yulan Wang, Yufeng Zhang, Anton Sculean, Richard J. Miron   +6 more
wiley   +1 more source

Shearlet-based regularized ROI reconstruction in fan beam computed tomography

, 2015
Region-of-interest (ROI) reconstruction in computed tomography (CT) is a problem receiving increasing attention in the medical imaging community, due to its potential to lower exposure to X-ray radiation and to reduce the scanning time.
Bubba T. , A., Labate, D., BONETTINI, Silvia, Goossens, B., Zanghirati, G.   +4 more
core   +1 more source

Scaling temporal resolution from mice to humans: Challenges and innovations in preclinical imaging of translational models

The Journal of Physiology, EarlyView.
Abstract figure legend Temporal scaling physiology differs significantly between mice and humans. Mice have higher metabolism, heart and respiratory rate, as well as faster blood flow rates, brain activity and physiological dynamics over time. These differences influence the temporal resolution needed in preclinical imaging of mouse models to ...
Sara Gargiulo, Matteo Gramanzini
wiley   +1 more source

The effectiveness and cost-effectiveness of computed tomography screening for coronary artery disease : systematic review [PDF]

, 2006
Coronary heart disease (CHD) is one of the main causes of mortality and morbidity in the UK and other Western countries. The disease can be asymptomatic until the first event, which may be a fatal myocardial infarction (heart attack).
Black, C. (Corrinda), Cummins, E. (Ewen), N Waugh, L McIntyre, E Cummins, C Black, Walker, S., Hillis, G. S., Waugh, Norman, G Hillis, S Walker, McIntyre, Linda   +11 more
core   +1 more source

Brown Adipose Tissue: Molecular Mechanisms of Regulation, Physiological Functions, and Therapeutic Targets

MedComm, Volume 7, Issue 10, October 2026.
This review systematically covers three core dimensions of brown adipose tissue (BAT): multilayered regulatory mechanisms governing brown adipocyte differentiation and phenotypic identity, physiological functions and signaling pathways in mediating thermogenesis and systemic metabolic crosstalk between BAT and multiple organs, and emerging clinical in ...
Xiaoli Deng, Yuanyuan Shen, Ying Sun, Lu Lu, Chongkui Sun   +4 more
wiley   +1 more source