keyword
MENU ▼
Read by QxMD icon Read
search

noninvasive vascular imaging

keyword
https://www.readbyqxmd.com/read/28910426/optical-coherence-tomography-angiography-features-of-iris-racemose-hemangioma-in-4-cases
#1
Jason L Chien, Kareem Sioufi, Sandor Ferenczy, Emil Anthony T Say, Carol L Shields
Importance: Optical coherence tomography angiography (OCTA) allows visualization of iris racemose hemangioma course and its relation to the normal iris microvasculature. Objective: To describe OCTA features of iris racemose hemangioma. Design, Setting, and Participants: Descriptive, noncomparative case series at a tertiary referral center (Ocular Oncology Service of Wills Eye Hospital). Patients diagnosed with unilateral iris racemose hemangioma were included in the study...
September 14, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28894975/reperfusion-of-the-choriocapillaris-observed-using-optical-coherence-tomography-angiography-in-hypertensive-choroidopathy
#2
Miwa Saito, Akihiro Ishibazawa, Reiko Kinouchi, Akitoshi Yoshida
PURPOSE: Optical coherence tomography angiography (OCTA) can visualize the vascular status of the choriocapillaris noninvasively and separately from the other vascular beds. We describe focal ischemia in the choriocapillaris and reperfusion of the area in hypertensive choroidopathy using en-face OCTA. CASE: A 32-year-old woman diagnosed with pregnancy-induced hypertension presented with acute anorthopia in the right eye after delivery via Caesarian section. Fundus examination showed an Elschnig's spot and serous retinal detachment (SRD) in the inferior perifoveal region...
September 11, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28887236/iatrogenic-major-venous-injury-is-associated-with-increased-morbidity-of-aortic-reconstruction
#3
Sachinder S Hans, Steven Vang, Gul Sachwani-Daswani
BACKGROUND: Major venous injury during open aortic reconstruction though uncommon often result in sudden and massive blood loss resulting in increased morbidity and mortality. This study details the etiology, management, and outcome of such injuries. METHODS: A retrospective review of 945 patients (1981-2017) undergoing aortic reconstruction from 2 mid-sized (350 bed teaching hospitals). Seven hundred twenty-three patients (76.5%) underwent open abdominal aortic aneurysm (AAA) repair/iliac aneurysm repair, 222 patients (23...
September 5, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28886803/optical-coherence-tomography-in-the-diagnosis-of-skin-cancer
#4
REVIEW
Amanda Levine, Katie Wang, Orit Markowitz
Optical coherence tomography (OCT) has emerged as a novel noninvasive imaging device that allows for the real-time, in vivo, cross-sectional imaging of skin morphology. OCT has increased imaging depth and field of view compared with reflectance confocal microscopy, at the cost of decreased cellular resolution. Frequency domain OCT, dynamic OCT (D-OCT), and high-definition OCT (HD-OCT) are useful in the diagnosis, treatment planning, and treatment monitoring of nonmelanoma skin cancers. Research is currently underway to assess the utilization of these devices in distinguishing between malignant and benign melanocytic lesions based on vascular patterns on D-OCT and cellular information on HD-OCT...
October 2017: Dermatologic Clinics
https://www.readbyqxmd.com/read/28884300/what-every-radiologist-should-know-about-adnexal-torsion
#5
Guillaume Ssi-Yan-Kai, Anne-Laure Rivain, Caroline Trichot, Marie-Chantal Morcelet, Sophie Prevot, Xavier Deffieux, Jocelyne De Laveaucoupet
Adnexal torsion is the fifth most common gynecologic surgical emergency, requiring clinician and radiologist awareness. It involves the rotation of the ovarian tissue on its vascular pedicle leading to stromal edema, hemorrhagic infarction, and necrosis of the adnexal structures with the subsequent sequelae. Expedient diagnosis poses a difficult challenge because the clinical presentation is variable and often misleading. Adnexal torsion can mimic malignancy as it can take a subacute, intermittent, or chronic course, and thereby can be complicated to diagnose...
September 7, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28880220/real-time-two-dimensional-magnetic-particle-imaging-for-electromagnetic-navigation-in-targeted-drug-delivery
#6
Tuan-Anh Le, Xingming Zhang, Ali Kafash Hoshiar, Jungwon Yoon
Magnetic nanoparticles (MNPs) are effective drug carriers. By using electromagnetic actuated systems, MNPs can be controlled noninvasively in a vascular network for targeted drug delivery (TDD). Although drugs can reach their target location through capturing schemes of MNPs by permanent magnets, drugs delivered to non-target regions can affect healthy tissues and cause undesirable side effects. Real-time monitoring of MNPs can improve the targeting efficiency of TDD systems. In this paper, a two-dimensional (2D) real-time monitoring scheme has been developed for an MNP guidance system...
September 7, 2017: Sensors
https://www.readbyqxmd.com/read/28866260/spatiotemporal-optoacoustic-mapping-of-tumor-hemodynamics-in-a-clinically-relevant-orthotopic-rabbit-model-of-head-and-neck-cancer
#7
Laurie J Rich, Sandra Sexton, Leslie Curtin, Mukund Seshadri
The purpose of this study was to investigate the usefulness of photoacoustic imaging (PAI) for spatiotemporal mapping of tumor hemodynamics in a rabbit model of head and neck carcinoma. Shope cottontail rabbit papilloma virus associated VX2 carcinomas were established in adult male New Zealand White rabbits (n = 9) by surgical transplantation of tumor tissue in the neck. Noninvasive PAI with co-registered ultrasound (US) was performed to longitudinally monitor tumor growth, oxygen saturation (%sO2), and hemoglobin concentration (HbT)...
August 31, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28860216/arterial-spin-labeling-perfusion-mr-imaging-demonstrates-regional-cbf-decrease-in-idiopathic-normal-pressure-hydrocephalus
#8
J Virhammar, K Laurell, A Ahlgren, E-M Larsson
BACKGROUND AND PURPOSE: Regional cerebral blood flow has previously been studied in patients with idiopathic normal pressure hydrocephalus with imaging methods that require an intravenous contrast agent or expose the patient to ionizing radiation. The purpose of this study was to assess regional CBF in patients with idiopathic normal pressure hydrocephalus compared with healthy controls using the noninvasive quantitative arterial spin-labeling MR imaging technique. A secondary aim was to compare the correlation between symptom severity and CBF...
August 31, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28858788/development-of-a-fluid-dynamic-model-for-quantitative-contrast-enhanced-ultrasound-imaging
#9
Baudouin Denis de Senneville, Anthony Novell, Chloe Arthuis, Vanda Mendes, Paul-Armand Dujardin, Frederic Patat, Ayache Bouakaz, Jean-Michel Escoffre, Franck Perrotin
Contrast-enhanced ultrasound (CEUS) is a noninvasive imaging technique extensively used for blood perfusion imaging of various organs. This modality is based on the acoustic detection of gas-filled microbubble contrast agents used as intravascular flow tracers. Recent efforts aim at quantifying parameters related to the enhancement in the vascular compartment using time-intensity curve (TIC), and at using these latter as indicators for several pathological conditions. However, this quantification is mainly hampered by two reasons: first, the quantification intrinsically solely relies on temporal intensity variation, the explicit spatial transport of the contrast agent being left out...
August 29, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28841925/increasing-role-of-dual-energy-ct-in-noninvasive-vascular-imaging
#10
Klaus D Hagspiel
No abstract text is available yet for this article.
September 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28830331/vascular-imaging-of-matrix-metalloproteinase-activity-as-an-informative-preclinical-biomarker-of-drug-induced-vascular-injury
#11
Raymond J Gonzalez, Shu-An Lin, Bohumil Bednar, Brett Connolly, Lisa LaFranco-Scheuch, Gebre M Mesfin, Thomas Philip, Shetal Patel, Timothy Johnson, Frank D Sistare, Warren E Glaab
Lack of biomarkers specific to and either predictive or diagnostic of drug-induced vascular injury (DIVI) continues to be a major obstacle during drug development. Biomarkers derived from physiologic responses to vessel injury, such as inflammation and vascular remodeling, could make good candidates; however, they characteristically lack specificity for vasculature. We evaluated whether vascular remodeling-associated protease activity, as well as changes to vessel permeability resulting from DIVI, could be visualized ex vivo in affected vessels, thereby allowing for visual monitoring of the pathology to address specificity...
July 2017: Toxicologic Pathology
https://www.readbyqxmd.com/read/28822765/real-time-monitoring-of-circulating-tumor-cell-ctc-release-after-nanodrug-or-tumor-radiotherapy-using-in-in%C3%A2-vivo-flow-cytometry
#12
Nathan A Koonce, Mazen A Juratli, Chengzhong Cai, Mustafa Sarimollaoglu, Yulian A Menyaev, Judith Dent, Charles M Quick, Ruud P M Dings, Dmitry Nedosekin, Vladimir Zharov, Robert J Griffin
Noninvasive biological readouts of tumor metastatic risk and therapeutic efficacy are needed as healthcare costs rise. CTCs are the source of metastasis in distant organs that are responsible for the majority of cancer-related deaths. Here we demonstrate the acute and long-term effect of vascular disrupting therapies (high-dose radiotherapy and tumor necrosis factor-alpha (TNF)) on CTCs released from the primary tumor with a non-invasive real-time in vivo flow cytometry system. Using our innovative flow cytometry platform, we show here that radiation and nanodrug treatment can lead to short term release of CTC from the primary tumor...
August 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28810002/retinal-oximetry-discovers-novel-biomarkers-in-retinal-and-brain-diseases
#13
REVIEW
Einar Stefánsson, Olof Birna Olafsdottir, Anna Bryndis Einarsdottir, Thorunn Scheving Eliasdottir, Thor Eysteinsson, Wouter Vehmeijer, Evelien Vandewalle, Toke Bek, Sveinn Hakon Hardarson
Purpose: Biomarkers for several eye and brain diseases are reviewed, where retinal oximetry may help confirm diagnosis or measure severity of disease. These include diabetic retinopathy, central retinal vein occlusion (CRVO), retinitis pigmentosa, glaucoma, and Alzheimer's disease. Methods: Retinal oximetry is based on spectrophotometric fundus imaging and measures oxygen saturation in retinal arterioles and venules in a noninvasive, quick, safe manner. Retinal oximetry detects changes in oxygen metabolism, including those that result from ischemia or atrophy...
May 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28793276/opacification-patterns-of-cardiac-masses-using-low-mechanical-index-contrast-echocardiography-comparison-with-histopathological-findings
#14
Agata Barchitta, Cristina Basso, Pier Giuseppe Piovesana, Francesco Antonini-Canterin, Luisa Ruzza, Alessandra Bianchi, Alberto Banzato, Maurizio Chiesa, Gaetano Thiene, Gino Gerosa, Stefania Rizzo
BACKGROUND: Two-dimensional echocardiography is the main noninvasive imaging tool to identify cardiac masses but is unable to provide detailed tissue characterization. AIM: The aim of the study was to assess the ability of low mechanical index (MI) contrast echocardiography to detect presence and amount of tissue vascularization as validated by histopathology study of cardiac masses. METHODS AND RESULTS: Twelve consecutive patients (5 females and 7 males, age range 51-82 years) underwent conventional and contrast two-dimensional echocardiography with low MI...
September 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28791067/optical-coherence-tomography-angiography-a-new-tool-in-glaucoma-diagnostics-and-research
#15
Ramin Daneshvar, Kouros Nouri-Mahdavi
Optical coherence tomography angiography (OCTA) is a new modality in ocular imaging which provides high resolution view of the vascular structures in the retina and optic nerve head. This technology has the advantages of being noninvasive, rapid and reproducible. OCTA is becoming a valuable tool for evaluating many retinal and optic nerve diseases. This article provides a brief introduction to the technology and its application in the field of glaucoma diagnostics.
July 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28783442/a-literature-review-on-current-and-proposed-technologies-of-noninvasive-blood-pressure-measurement
#16
Ramtanu Mukherjee, Sanchita Ghosh, Bharat Gupta, Tapas Chakravarty
BACKGROUND: Noninvasive continuous blood pressure (BP) measurement has become an evolving topic in the field of remote healthcare. The classical noninvasive BP measurement techniques provide spontaneous values of systolic and diastolic BP. On the other hand, intrusive type BP measurement techniques provide continuous values of systolic and diastolic BP. However, these techniques are very painful, cannot be used for long-term monitoring, and are obtainable only in an intensive care unit environment...
August 7, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28743388/traumatic-bilateral-dissection-of-cervical-internal-carotid-artery-in-the-wake-of-a-car-accident-a-case-report
#17
N Taoussi, A J Alghamdi, J Bielewicz, P Luchowski, K Rejdak
BACKGROUND: Bilateral carotid artery dissection secondary to severe trauma is rare and can be potentially life -threatening if not diagnosed and treated properly. CASE PRESENTATION: We report a 29-year-old female who was admitted to the emergency department after a car accident. The patient was conscious at the time of admission and presented with an initial Glasgow Coma Scale (GCS) of 15 presenting normal vital signs. The patient developed motor dysphasia with right upper limb paresis a few hours after the admission...
July 10, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28738134/indocyanine-green-angiography-and-optical-coherence-tomography-angiography-of-choroidal-neovascularization-in-age-related-macular-degeneration
#18
COMPARATIVE STUDY
Chiara M Eandi, Antonio Ciardella, Mariacristina Parravano, Filippo Missiroli, Camilla Alovisi, Chiara Veronese, Maria C Morara, Massimo Grossi, Gianni Virgili, Federico Ricci
Purpose: To compare the capability of indocyanine green angiography (ICGA) and optical coherence tomography angiography (OCTA) in detecting choroidal neovascularization (CNV). Methods: In this prospective study, patients with CNV detected with fluorescein angiography (FA) underwent ICGA and OCTA, spectral domain OCT (SD-OCT), and infrared or fundus color photographs. CNV lesions were outlined on ICGA and OCTA images, and the composition and size of the CNV was documented...
July 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28737601/new-ways-to-detect-pediatric-sickle-cell-retinopathy-a-comprehensive-review
#19
Daniel A Pahl, Nancy S Green, Monica Bhatia, Royce W S Chen
Sickle retinopathy reflects disease-related vascular injury of the eye, which can potentially result in visual loss from vitreous hemorrhage or retinal detachment. Here we review sickle retinopathy among children with sickle cell disease, describe the epidemiology, pediatric risk factors, pathophysiology, ocular findings, and treatment. Newer, more sensitive ophthalmological imaging modalities are available for retinal imaging, including ultra-widefield fluorescein angiography, spectral-domain optical coherence tomography, and optical coherence tomography angiography...
July 21, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28736671/noninvasive-in-vivo-monitoring-of-collagenase-induced-intracerebral-hemorrhage-by-photoacoustic-tomography
#20
Dan Wu, Jinge Yang, Guang Zhang, Huabei Jiang
Photoacoustic tomography (PAT) is an emerging noninvasive biomedical imaging modality that can be used for visualizing the structure and function of brain in high resolution. Here we report an application of PAT to imaging intracerebral hemorrhage (ICH) in a mouse model. In vivo photoacoustic images were obtained in mice with right basal ganglia hemorrhage induced by microinjection of collagenase. With multi-spectral light excitation, cortical vascular network was clearly revealed at 532 nm, and ICH associated hematoma lesions and perihemmatoma regions were accurately mapped over time at 750 nm and 875 nm, respectively...
April 1, 2017: Biomedical Optics Express
keyword
keyword
68226
1
2
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"