Read by QxMD icon Read


Chao Tian, Wei Zhang, Van Phuc Nguyen, Xueding Wang, Yannis M Paulus
Photoacoustic ocular imaging is an emerging ophthalmic imaging technology that can noninvasively visualize ocular tissue by converting light energy into sound waves and is currently under intensive investigation. However, most reported work to date is focused on the imaging of the posterior segment of the eyes of small animals, such as rats and mice, which poses challenges for clinical human translation due to small eyeball sizes. This manuscript describes a novel photoacoustic microscopy (PAM) and optical coherence tomography (OCT) dual-modality system for posterior segment imaging of the eyes of larger animals, such as rabbits...
February 8, 2018: Journal of Visualized Experiments: JoVE
Karthik Vishwanath, Rajan Gurjar, David Wolf, Suzannah Riccardi, Michael Duggan, David King
Reliable, continuous and noninvasive blood flow and hemoglobin monitoring in trauma patients remains a critical, but generally unachieved goal. Two optical sensing methods - diffuse correlation spectroscopy (DCS) and diffuse reflectance spectroscopy (DRS) - are used to monitor and detect internal hemorrhage. Specifically, we investigate if cutaneous perfusion measurements acquired using DCS and DRS in peripheral (thighs and ear-lobe) tissues could detect severe hemorrhagic shock in a porcine model. Four animals underwent high-grade hepato-portal injury in a closed abdomen, to induce uncontrolled hemorrhage and were subsequently allowed to bleed for 10 minutes before fluid resuscitation...
February 1, 2018: Biomedical Optics Express
Xi Li, Hui Li, Xingzhen He, Tingai Chen, Xianyuan Xia, Chunxia Yang, Wei Zheng
Early identification of premalignant and malignant gastric mucosa is crucial to decrease the incidence and mortality of stomach cancer. Spectrum- and time-resolved multiphoton microscopy are capable of providing not only structural but also biochemical information at the subcellular level. Based on this multidimensional imaging technique, we performed a systematic investigation on fresh human tissue specimens at the typical stages of gastric carcinogenesis, including normal, chronic gastritis with erosion, chronic gastritis with intestinal metaplasia, and intestinal-type adenocarcinoma...
February 1, 2018: Biomedical Optics Express
Jun Yang, Chengde Liao, Yifan Liu, Guangjun Yang, Tengfei Ke, Yingying Ding, Qinqing Li
The beginning and the end of the vascular normalization window are not clear in response to anti-angiogenic therapies. We used dynamic contrast-enhanced MRI (DCE-MRI) and intravoxel incoherent motion MRI (IVIM-MRI) to noninvasively evaluate the vascular normalization window. MRI was performed five times: before treatment and on the second, fourth, sixth and eighth days of treatment. Quantitative perfusion parameters were calculated at each time point, including the volume transfer coefficient (Ktrans), reverse transfer constant (Kep), pseudodiffusion coefficient (D* ) and perfusion fraction (f)...
February 23, 2018: Oncotarget
Narges Aghaallaei, Baubak Bajoghli
T-cell development is coupled with a highly ordered migratory pattern. Lymphoid progenitors must follow a precise journey; starting from the hematopoietic tissue, they move toward the thymus and then migrate into and out of distinct thymic microenvironments, where they receive signals and cues required for their differentiation into naïve T-cells. Knowing where, when, and how these cells make directional "decisions" is key to understanding T-cell development. Such insights can be gained by directly observing developing T-cells within their environment under various conditions and following specific experimental manipulations...
2018: Frontiers in Immunology
Yu Jen Jan, Jie-Fu Chen, Yazhen Zhu, Yi-Tsung Lu, Szu Hao Chen, Howard Chung, Matthew Smalley, Yen-Wen Huang, Jiantong Dong, Hsiao-Hua Yu, James S Tomlinson, Shuang Hou, Vatche G Agopian, Edwin M Posadas, Hsian-Rong Tseng
Circulating tumor cells (CTCs) are cancer cells shredded from either a primary tumor or a metastatic site and circulate in the blood as the potential cellular origin of metastasis. By detecting and analyzing CTCs, we will be able to noninvasively monitor disease progression in individual cancer patients and obtain insightful information for assessing disease status, thus realizing the concept of "tumor liquid biopsy". However, it is technically challenging to identify CTCs in patient blood samples because of the extremely low abundance of CTCs among a large number of hematologic cells...
March 15, 2018: Advanced Drug Delivery Reviews
Alexander Lam, Kevin Bui, Eduardo Hernandez Rangel, Michael Nguyentat, Dayantha Fernando, Kari Nelson, Nadine Abi-Jaoudeh
Radiogenomics involves the integration of mineable data from imaging phenotypes with genomic and clinical data to establish predictive models using machine learning. As a noninvasive surrogate for a tumor's in vivo genetic profile, radiogenomics may potentially provide data for patient treatment stratification. Radiogenomics may also supersede the shortcomings associated with genomic research, such as the limited availability of high-quality tissue and restricted sampling of tumoral subpopulations. Interventional radiologists are well suited to circumvent these obstacles through advancements in image-guided tissue biopsies and intraprocedural imaging...
March 15, 2018: Journal of Vascular and Interventional Radiology: JVIR
C Guillot, C Le Reun, H Behal, J Labreuche, M Recher, A Duhamel, S Leteurtre
BACKGROUND: Viral bronchiolitis is the leading cause of hospitalization in children during the first 12 months of life. There is evidence to support the use of noninvasive ventilation in bronchiolitis. A recent respiratory management of bronchiolitis is the use of high-flow nasal cannula (HFNC) therapy. The primary objective of this study was to evaluate the use of HFNC as the first-line treatment for children with severe bronchiolitis and the secondary objective was to identify factors for HFNC therapy failure...
March 15, 2018: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
Shiteng Suo, Lan Zhang, Hui Tang, Qihong Ni, Suqin Li, Haimin Mao, Xiangyu Liu, Shengyun He, Jianxun Qu, Qing Lu, Jianrong Xu
BACKGROUND: Noninvasive cardiovascular magnetic resonance (CMR) techniques including arterial spin labeling (ASL), blood oxygenation level-dependent (BOLD), and intravoxel incoherent motion (IVIM), are capable of measuring tissue perfusion-related parameters. We sought to evaluate and compare these three CMR techniques in characterizing skeletal muscle perfusion in lower extremities and to investigate their abilities to diagnose and assess the severity of peripheral arterial disease (PAD)...
March 19, 2018: Journal of Cardiovascular Magnetic Resonance
Aimée C Dane, Madelyn Peterson, Yvette D Miller
Adequate knowledge is a vital component of informed decision-making; however, we do not know what information women value when making decisions about noninvasive prenatal testing (NIPT). The current study aimed to identify women's information needs for decision-making about NIPT as a first-tier, non-contingent test with out-of-pocket expense and, in turn, inform best practice by specifying the information that should be prioritized when providing pre-test counseling to women in a time-limited scenario or space-limited decision support tool...
March 17, 2018: Journal of Genetic Counseling
Kathryn J Gray, Louise E Wilkins-Haug
Prenatal aneuploidy screening changed significantly in 2012 when cell-free fetal deoxyribonucleic acid (DNA) was introduced as a noninvasive prenatal test. A noninvasive prenatal test detects cell free fragments of fetal DNA from the placenta circulating in maternal blood that coexist with cell-free DNA (cfDNA) of maternal origin. Using next-generation sequencing, the noninvasive prenatal test compares maternal and fetal cfDNA ratios for chromosomes of interest (i.e., 21, 18, 13, X, and Y) to assess chromosomal aneuploidy...
April 2018: Pediatric Radiology
Floriana Costanzo, Serena Rossi, Cristiana Varuzza, Pamela Varvara, Stefano Vicari, Deny Menghini
Noninvasive brain stimulation transiently modulates reading ability in individuals with dyslexia by facilitating the underactive neural pathways in them. However, its long-term effects have not been determined. This study confirmed the ameliorative effects of multiple sessions of transcranial direct current stimulation (tDCS) combined with a training for reading on the reading abilities of children and adolescents with dyslexia and examined whether they are long-lasting. Twenty-six children and adolescents with dyslexia received 3 20-minute sessions per week for 6 weeks (18 sessions) of left anodal/right cathodal tDCS, set to 1mA, over the parieto-temporal regions, combined with training for reading...
March 14, 2018: Neuropsychologia
Olivier Villemain, Mafalda Correia, Elie Mousseaux, Jérome Baranger, Samuel Zarka, Ilya Podetti, Gilles Soulat, Thibaud Damy, Albert Hagège, Mickael Tanter, Mathieu Pernot, Emmanuel Messas
OBJECTIVES: The goal of our study was to investigate the potential of myocardial shear wave imaging (SWI) to quantify the diastolic myocardial stiffness (MS) (kPa) noninvasively in adult healthy volunteers (HVs) and its physiological variation with age, and in hypertrophic cardiomyopathy (HCM) populations with heart failure and preserved ejection function (HFpEF). BACKGROUND: MS is an important prognostic and diagnostic parameter of the diastolic function. MS is affected by physiological changes but also by pathological alterations of extracellular and cellular tissues...
March 9, 2018: JACC. Cardiovascular Imaging
Joo Myung Lee, Gilwoo Choi, Bon-Kwon Koo, Doyeon Hwang, Jonghanne Park, Jinlong Zhang, Kyung-Jin Kim, Yaliang Tong, Hyun Jin Kim, Leo Grady, Joon-Hyung Doh, Chang-Wook Nam, Eun-Seok Shin, Young-Seok Cho, Su-Yeon Choi, Eun Ju Chun, Jin-Ho Choi, Bjarne L Nørgaard, Evald Christiansen, Koen Niemen, Hiromasa Otake, Martin Penicka, Bernard de Bruyne, Takashi Kubo, Takashi Akasaka, Jagat Narula, Pamela S Douglas, Charles A Taylor, Hyo-Soo Kim
OBJECTIVES: We investigated the utility of noninvasive hemodynamic assessment in the identification of high-risk plaques that caused subsequent acute coronary syndrome (ACS). BACKGROUND: ACS is a critical event that impacts the prognosis of patients with coronary artery disease. However, the role of hemodynamic factors in the development of ACS is not well-known. METHODS: Seventy-two patients with clearly documented ACS and available coronary computed tomographic angiography (CTA) acquired between 1 month and 2 years before the development of ACS were included...
March 9, 2018: JACC. Cardiovascular Imaging
Simone Frea, Paolo Centofanti, Stefano Pidello, Francesca Giordana, Virginia Bovolo, Andrea Baronetto, Beatrice Franco, Marco Matteo Cingolani, Matteo Attisani, Mara Morello, Serena Bergerone, Mauro Rinaldi, Fiorenzo Gaita
OBJECTIVES: The aim of this prospective study was to validate an echocardiographic protocol derived from 5 HeartWare left ventricular assist device (HVAD) patients for the noninvasive evaluation of right atrial pressure (RAP) and left atrial pressure (LAP) in HVAD patients. BACKGROUND: Echocardiography is an invaluable tool to optimize medical treatment and pump settings and also for troubleshooting residual heart failure. Little is known about the echocardiographic evaluation of hemodynamic status in HVAD patients...
March 9, 2018: JACC. Cardiovascular Imaging
Li Huang, Calum T Roberts, Brett J Manley, Louise S Owen, Peter G Davis, Kim M Dalziel
OBJECTIVE: To compare the cost-effectiveness of 2 common "noninvasive" modes of respiratory support for infants born preterm. STUDY DESIGN: An economic evaluation was conducted as a component of a multicenter, randomized control trial from 2013 to 2015 enrolling infants born preterm at ≥28 weeks of gestation with respiratory distress, <24 hours old, who had not previously received endotracheal intubation and mechanical ventilation or surfactant. The economic evaluation was conducted from a healthcare sector perspective and the time horizon was from birth until death or first discharge...
March 15, 2018: Journal of Pediatrics
Antonella Macerollo, Matt J N Brown, James M Kilner, Robert Chen
Measurements of somatosensory evoked potentials (SEPs), recorded using electroencephalography during different phases of movement, have been fundamental in understanding the neurophysiological changes related to motor control. SEP recordings have also been used to investigate adaptive plasticity changes in somatosensory processing related to active and observational motor learning tasks. Combining noninvasive brain stimulation with SEP recordings and intracranial SEP depth recordings, including recordings from deep brain stimulation electrodes, has been critical in identifying neural areas involved in specific temporal stages of somatosensory processing...
March 14, 2018: Trends in Neurosciences
Charalambos Vlachopoulos, Christos Georgakopoulos, Iosif Koutagiar, Dimitrios Tousoulis
Peripheral artery disease (PAD) affects approximately one in five persons older than 70 years of age and it is often present in patients with concomitant vascular disease in different body territories (e.g. coronary artery disease). Diagnosis at an early stage is important in order to achieve improvement in patient's symptoms and prognosis. Remarkable improvements in the field of noninvasive and invasive imaging techniques have led to an advanced level the management of patients with PAD. Throughout this review article, the clinically available diagnostic modalities in PAD are presented...
March 14, 2018: Current Opinion in Pharmacology
Zhao-Lian Lu, Ying-Jian Chen, Xin-Yan Jing, Na-Na Wang, Ting Zhang, Cheng-Jin Hu
BACKGROUND Papillary thyroid cancer (PTC) is currently the most commonly diagnosed endocrine malignancy. In addition, the sex- and age-adjusted incidence of PTC has exhibited a greater increase over the last 2 decades than in many other malignancies. Thus, discovering noninvasive specific serum biomarker to distinguish PTC from cancer-free controls in its early stages remains an important goal. MATERIAL AND METHODS Serum samples from 88 PTC patients and 80 cancer-free controls were randomly allocated into training or validation sets...
March 17, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Christopher G Roth, Dina Halegoua-De Marzio, Flavius F Guglielmo
MRI has transformed from the theoretical, investigative realm to mainstream clinical medicine over the past four decades and has become a core component of the diagnostic toolbox in the practice of gastroenterology (GI). Its success is attributable to exquisite contrast and the ability to isolate specific proton species through the use of different pulse sequences (i.e., T1-weighted, T2-weighted, diffusion-weighted) and exploiting extracellular and hepatobiliary contrast agents. Consequently, MRI has gained preeminence in various GI clinical applications: liver and pancreatic lesion evaluation and detection, liver transplantation evaluation, pancreatitis evaluation, Crohn's disease evaluation (using MR enterography) rectal cancer staging and perianal fistula evaluation...
March 16, 2018: Digestive Diseases and Sciences
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"