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noninvasive vascular imaging

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https://www.readbyqxmd.com/read/28743388/traumatic-bilateral-dissection-of-cervical-internal-carotid-artery-in-the-wake-of-a-car-accident-a-case-report
#1
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
#2
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
#3
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
#4
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
https://www.readbyqxmd.com/read/28728187/in-vivo-microvascular-pattern-of-solitary-juxtapapillary-capillary-hemangioma-on-oct-angiography
#5
M B Thirumalesh, Astha Jain, Sumeet Agrawal, K Bhujang Shetty
Juxtapapillary capillary hemangioma (JCH) is a vascular hamartoma. Fluorescein fundus angiography aids in diagnosis. The vascular morphology of this tumor has not been documented with optical coherence tomography angiography (OCTA), a new, noninvasive diagnostic modality that provides high-resolution images of vascular pattern based on blood flow in the retina and choroid. Although mainly a clinical diagnosis, OCTA helps in studying the intrinsic vascularity of the tumor and helps in differentiating it from other vascular tumors...
July 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28728184/multi-spectral-imaging-of-circumscribed-choroidal-hemangioma-introduction
#6
Nicola Y Gan, Cheryl Zimmer, Wai-Ching Lam
BACKGROUND AND OBJECTIVE: To illustrate the features of a circumscribed choroidal hemangioma (CCH) using Annidis RHA multi-spectral imaging (MSI) technology (Annidis Corporation, Ottawa, Canada). This novel imaging technique uses non-overlapping, narrow-band LED light sources ranging from 520 nm to 940 nm to create a monochromatic series of en face fundus images and oxy/deoxyhemoglobin contrasted maps of the retina and choroid. PATIENTS AND METHODS: Annidis RHA MSI images were taken of a 67-year-old Chinese male with CCH...
July 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28708222/multimodal-imaging-in-a-patient-with-traumatic-choroidal-ruptures
#7
Luisa Pierro, Chiara Giuffrè, Alessandro Rabiolo, Marco Gagliardi, Alessandro Arrigo, Francesco Bandello
PURPOSE: To describe the case and the follow-up of a traumatic choroidal rupture characterized by means of multimodal imaging including color fundus photographs, infrared reflectance, blue autofluorescence, swept-source optical coherence tomography, fluorescein angiography (FA), indocyanine green angiography (ICGA), and optical coherence tomography angiography (OCT-A). METHODS: Case report. RESULTS: A 17-year-old boy was referred to our clinic complaining of reduction in visual acuity in the right eye (RE) after a blunt ocular trauma during a soccer match...
July 5, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28701474/detecting-human-coronary-inflammation-by-imaging-perivascular-fat
#8
Alexios S Antonopoulos, Fabio Sanna, Nikant Sabharwal, Sheena Thomas, Evangelos K Oikonomou, Laura Herdman, Marios Margaritis, Cheerag Shirodaria, Anna-Maria Kampoli, Ioannis Akoumianakis, Mario Petrou, Rana Sayeed, George Krasopoulos, Constantinos Psarros, Patricia Ciccone, Carl M Brophy, Janet Digby, Andrew Kelion, Raman Uberoi, Suzan Anthony, Nikolaos Alexopoulos, Dimitris Tousoulis, Stephan Achenbach, Stefan Neubauer, Keith M Channon, Charalambos Antoniades
Early detection of vascular inflammation would allow deployment of targeted strategies for the prevention or treatment of multiple disease states. Because vascular inflammation is not detectable with commonly used imaging modalities, we hypothesized that phenotypic changes in perivascular adipose tissue (PVAT) induced by vascular inflammation could be quantified using a new computerized tomography (CT) angiography methodology. We show that inflamed human vessels release cytokines that prevent lipid accumulation in PVAT-derived preadipocytes in vitro, ex vivo, and in vivo...
July 12, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28692175/neurosonology-accuracy-for-isolated-acute-vestibular-syndromes
#9
Miguel Tábuas-Pereira, João Sargento-Freitas, Luís Isidoro, Fernando Silva, Orlando Galego, César Nunes, Gustavo Cordeiro, Luís Cunha
OBJECTIVES: The clinical approach to acute vestibular syndromes is often complex for the physician. Neurosonology offers a noninvasive method to study the cervicocephalic circulation when a vascular etiology is suspected. We aim to evaluate the diagnostic accuracy of a vascular neurosonological exam in isolated acute vestibular syndrome. METHODS: All patients submitted to cerebrovascular ultrasound and magnetic resonance imaging during the period between 2011 and 2015 with acute isolated vestibular syndrome...
July 10, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28663925/noninvasive-mesoscopic-imaging-of-actinic-skin-damage-using-spatial-frequency-domain-imaging
#10
Jeffrey B Travers, Chien Poon, Daniel J Rohrbach, Nathan M Weir, Elizabeth Cates, Faye Hager, Ulas Sunar
For prevention and accurate intervention planning, it is crucial to predict if lesions will progress towards cancer. In this study, we investigated the change in optical properties and vascular parameters to characterize skin tissue from mild photodamage to actinic keratosis (AK). Multi-wavelength spatial frequency domain imaging (SFDI) measurements were performed on three patients with clinically normal skin, as well as pre-cancerous actinic keratosis lesions. Our results indicate that there exist significant differences in both optical and vascular parameters between these patients, and that these parameters can be early biomarkers of neoplasia...
June 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28663862/quantitative-characteristics-of-sickle-cell-retinopathy-in-optical-coherence-tomography-angiography
#11
Minhaj Alam, Damber Thapa, Jennifer I Lim, Dingcai Cao, Xincheng Yao
Early detection is an essential step for effective intervention of sickle cell retinopathy (SCR). Emerging optical coherence tomography angiography (OCTA) provides excellent three-dimensional (3D) resolution to enable label-free, noninvasive visualization of retinal vascular structures, promising improved sensitivity in detecting SCR. However, quantitative analysis of SCR characteristics in OCTA images is yet to be established. In this study, we conducted comprehensive analysis of six OCTA parameters, including blood vessel tortuosity, vessel diameter, vessel perimeter index (VPI), area of foveal avascular zone (FAZ), contour irregularity of FAZ and parafoveal avascular density...
March 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28657379/a-new-imaging-technique-for-assessment-of-the-effectiveness-of-long-pulse-nd-yag-532-nm-laser-in-treatment-of-facial-port-wine-stain
#12
Murtadha Hashim Al-Janabi, Noor Taha Ismaeel Ali, Karrar Dheiaa Mohammed, Muhsin A Al-Dhalimi, Sahib Neamh Abdul Wahid
BACKGROUND: PWS is a vascular malformation presented at birth and associated with a psychological problem to the patients. Many types the laser systems were used to solve this problem. AIM OF THE STUDY: to assess the efficacy of long-pulsed Nd:YAG 532 nm for the treatment of port wine stain both clinically and by imaging technique. PATIENTS AND METHODS: This is an Interventional therapeutic clinical study for the treatment of facial port-twine stain with long-pulsed, 532nm, Nd:YAG laser...
June 28, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28643092/application-of-ct-texture-analysis-in-predicting-histopathological-characteristics-of-gastric-cancers
#13
Shunli Liu, Song Liu, Changfeng Ji, Huanhuan Zheng, Xia Pan, Yujuan Zhang, Wenxian Guan, Ling Chen, Yue Guan, Weifeng Li, Jian He, Yun Ge, Zhengyang Zhou
OBJECTIVES: To explore the application of computed tomography (CT) texture analysis in predicting histopathological features of gastric cancers. METHODS: Preoperative contrast-enhanced CT images and postoperative histopathological features of 107 patients (82 men, 25 women) with gastric cancers were retrospectively reviewed. CT texture analysis generated: (1) mean attenuation, (2) standard deviation, (3) max frequency, (4) mode, (5) minimum attenuation, (6) maximum attenuation, (7) the fifth, 10th, 25th, 50th, 75th and 90th percentiles, and (8) entropy...
June 22, 2017: European Radiology
https://www.readbyqxmd.com/read/28639927/carotid-artery-plaque-vulnerability-assessment-using-noninvasive-ultrasound-elastography-validation-with-mri
#14
Marie-Hélène Roy Cardinal, Maarten H G Heusinkveld, Zhao Qin, Richard G P Lopata, Cyrille Naim, Gilles Soulez, Guy Cloutier
OBJECTIVE: Vulnerable and nonvulnerable carotid artery plaques have different tissue morphology and composition that may affect plaque biomechanics. The objective of this study is to evaluate plaque vulnerability with the use of ultrasound noninvasive vascular elastography (NIVE). MATERIALS AND METHODS: Thirty-one patients (mean [± SD] age, 69 ± 7 years) with stenosis of the internal carotid artery of 50% or greater were enrolled in this cross-sectional study...
July 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28634807/differential-diagnosis-between-benign-and-malignant-soft-tissue-tumors-utilizing-ultrasound-parameters
#15
Takeshi Morii, Tomonori Kishino, Naoko Shimamori, Mitsue Motohashi, Hiroaki Ohnishi, Keita Honya, Takayuki Aoyagi, Takashi Tajima, Shoichi Ichimura
PURPOSE: Preoperative discrimination between benign and malignant soft tissue tumors is critical for the prevention of excess application of magnetic resonance imaging and biopsy as well as unplanned resection. Although ultrasound, including power Doppler imaging, is an easy, noninvasive, and cost-effective modality for screening soft tissue tumors, few studies have investigated reliable discrimination between benign and malignant soft tissue tumors. METHODS: To establish a modality for discrimination between benign and malignant soft tissue tumors using ultrasound, we extracted the significant risk factors for malignancy based on ultrasound information from 40 malignant and 56 benign pathologically diagnosed soft tissue tumors and established a scoring system based on these risk factors...
June 20, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28614306/photoacoustic-confocal-dermoscope-with-a-waterless-coupling-and-impedance-matching-opto-sono-probe
#16
Haigang Ma, Sihua Yang, Zhongwen Cheng, Da Xing
Recently, intensive research on photoacoustic (PA) imaging has been conducted to accelerate the development of dermoscopy of the human skin. In this Letter, we first developed a PA dermoscope equipped with a waterless coupling and impedance matching opto-sono probe to achieve quantitative, high-resolution, and high-contrast imaging of the human skin. Compared with the commonly used liquid-coupled PA probes, the human-skin-adapted probe can facilitate implementation in the clinical setting. The noninvasive imaging experiments of epidermal and dermal structures in volunteers have been carried out to demonstrate the high imaging quality that can be obtained by using such an opto-sono probe for a PA dermoscope...
June 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28614137/swept-source-optical-coherence-tomography-angiography-in-rickettsial-retinitis
#17
Rim Kahloun, Bechir Jelliti, Imen Ksiaa, Hager Ben Amor, Sonia Zaouali, Marco Lupidi, Salim Ben Yahia, Moncef Khairallah
PURPOSE: To report optical coherence tomography angiography findings in a patient with rickettsial retinitis. METHODS: A 29-year-old man complaining of acute blurring vision in the right eye associated with Rickettsia conorii infection underwent a comprehensive ocular examination, fluorescein angiography, spectral-domain optical coherence tomography, and swept-source optical coherence tomography angiography. RESULTS: Funduscopy showed two large areas of retinitis in the inferior macula along the distribution of the inferotemporal artery with associated retinal hemorrhages, retinal edema, and serous retinal detachment...
June 13, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28613354/the-quantitative-measurements-of-vascular-density-and-flow-areas-of-macula-using-optical-coherence-tomography-angiography-in-normal-volunteers
#18
Fariba Ghassemi, Kaveh Fadakar, Fatemeh Bazvand, Reza Mirshahi, Masoumeh Mohebbi, Siamak Sabour
BACKGROUND AND OBJECTIVE: The quantification of the density of macular vascular networks and blood flow areas in the foveal and parafoveal area in healthy subjects using optical coherence tomography angiography (OCTA). PATIENTS AND METHODS: Cross-sectional, prospective study in an institutional setting at the Retina Services of Farabi Eye Hospital. One hundred twelve normal volunteers with no known ocular or systemic disease were included, including patient numbers (one or both eyes), selection procedures, inclusion/exclusion criteria, randomization procedure, and masking...
June 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28613216/polypoidal-choroidal-vasculopathy-upon-optical-coherence-tomographic-angiography
#19
Szy Yann Chan, Qian Wang, Ya Xing Wang, Xue Hui Shi, Jost B Jonas, Wen Bin Wei
PURPOSE: To study polypoidal lesions and branching choroidal vascular networks in eyes with polypoidal choroidal vasculopathy by optical coherence tomography (OCT)-based angiography (OCTA). METHODS: In the observational cross-sectional study, patients with polypoidal choroidal vasculopathy, as diagnosed by indocyanine green angiography, underwent OCTA. RESULTS: Thirty-two eyes of 31 patients with an age of 61.1 ± 7.6 years were included. Branching choroidal vascular networks were detected by indocyanine green angiography and OCTA in 25 of 32 (78 ± 73%) and in 30 of 32 (94 ± 4%) eyes, respectively, with a marginally significant difference (P = 0...
May 22, 2017: Retina
https://www.readbyqxmd.com/read/28605001/determination-of-structural-femoral-head-allograft-viability-and-integrity-with-a-novel-diagnostic-tool-spect-ct-a-preliminary-study
#20
Kasım Kilicarslan, Nadir Yalcin, Vedat Bicici, Elif Ozdemir, Izzet Bingol, Seyda Turkolmez
OBJECTIVE: To evaluate the viability and integrity of fresh frozen bulk femoral head allografts obtained from the institutional bone bank that were used to reconstruct severe acetabular defects and to validate the SPECT/CT method which gives both anatomical and functional data for this purpose. METHODS: We retrospectively reviewed 9 patients (6 female, 3 male; mean age 63.6 years). Preoperative and postoperative leg lengths, existence of the Trendelenburg sign, range of motion of the hip, visual analogue score (VAS), Harris Hip Score (HHS) and any complication were assesed at each follow-up...
June 2, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
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