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noninvasive imaging

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https://www.readbyqxmd.com/read/29774779/image-guided-radiation-therapy-for-post-operative-gynaecologic-cancer-patient-set-up-verification-with-and-without-implanted-fiducial-markers
#1
Donna H Murrell, Andrew Warner, Quinn Benwell, Wendy Wells, Danielle Scott, Vikram Velker, George Hajdok, David P D'Souza
BACKGROUND: Intensity modulated radiotherapy (IMRT) is increasingly being used to treat gynaecological malignancies in the postoperative setting. The purpose of this study was to evaluate the use of image-guided radiotherapy (IGRT) using cone-beam computed tomography (CBCT) with fiducial markers for daily localization. MATERIAL AND METHODS: A single institution study was performed of consecutive cervical or endometrial cancer patients receiving adjuvant external beam radiotherapy (n = 15)...
May 18, 2018: Acta Oncologica
https://www.readbyqxmd.com/read/29774076/the-human-somatostatin-receptor-type-2-as-an-imaging-and-suicide-reporter-gene-for-pluripotent-stem-cell-derived-therapy-of-myocardial-infarction
#2
Katrien Neyrinck, Natacha Breuls, Bryan Holvoet, Wouter Oosterlinck, Esther Wolfs, Hubert Vanbilloen, Olivier Gheysens, Robin Duelen, Willy Gsell, Ivo Lambrichts, Uwe Himmelreich, Catherine M Verfaillie, Maurilio Sampaolesi, Christophe M Deroose
Rationale: Pluripotent stem cells (PSCs) are being investigated as a cell source for regenerative medicine since they provide an infinitive pool of cells that are able to differentiate towards every cell type of the body. One possible therapeutic application involves the use of these cells to treat myocardial infarction (MI), a condition where billions of cardiomyocytes (CMs) are lost. Although several protocols have been developed to differentiate PSCs towards CMs, none of these provide a completely pure population, thereby still posing a risk for neoplastic teratoma formation...
2018: Theranostics
https://www.readbyqxmd.com/read/29773860/noninvasive-low-cycle-fatigue-characterization-at-high-depth-with-photoacoustic-eigen-spectrum-analysis
#3
Xiaoxiang Gao, Chao Tao, Rong Zhu, Xiaojun Liu
In this work, photoacoustic eigen-spectrum analysis was proposed for noninvasively characterizing the mechanical properties of materials. We theoretically predicted the relationship between the photoacoustic eigen-spectra of cylindrical optical absorbers and their mechanical properties. Experimental measurements of eigen-spectra extracted from photoacoustic coda waves agreed well with the theoretical predictions. We then applied the photoacoustic eigen-spectrum analysis for contactless monitoring of low-cycle fatigue damage...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29772963/simplifying-skin-disease-diagnosis-with-topical-nanotechnology
#4
David C Yeo, Chenjie Xu
A new study published in the journal Nature Biomedical Engineering1 documents a novel diagnostic technology that exploits topically applied nanotechnology to detect skin tissue biomarkers for diagnosis. This concept is demonstrated by noninvasively imaging connective tissue growth factor (CTGF) mRNA in abnormal scar cells, whole tissue, and animal models. In this commentary, we highlight the main findings and discuss their implications. Successful implementation in the clinic could give rise to self-applied, biopsy-free diagnostic technology and significantly reduce healthcare burden...
May 1, 2018: SLAS Technology
https://www.readbyqxmd.com/read/29770267/role-of-noninvasive-imaging-of-cerebral-arterial-system-in-ischemic-stroke-comparison-of-transcranial-color-coded-doppler-sonography-with-magnetic-resonance-angiography
#5
Betty Simon, Sunithi Elizabeth Mani, Shyamkumar Nidugala Keshava, Mathew Alexander, Sanjith Aaron
Aim: To determine the accuracy of transcranial color-coded Doppler sonography (TCCS) in the evaluation of cerebral arterial system in patients with ischemic stroke attending a tertiary care hospital in South India. Objectives: (1) To describe the topographical distribution of atherosclerotic lesions in the cerebral circulation in patients presenting with ischemic stroke from the Indian subcontinent and (2) to determine the accuracy of TCCS for detection and quantification of intracranial stenoses in various segments of the intracerebral arterial system in comparison with magnetic resonance angiography (MRA)...
2018: Journal of Clinical Imaging Science
https://www.readbyqxmd.com/read/29768319/contrast-enhanced-stress-echocardiography-and-myocardial-perfusion-imaging-in-patients-hospitalized-with-chest-pain-a-randomized-study
#6
Gerald Salame, Whitney E Juselius, Marisha Burden, Carlin S Long, Tiffany Bendelow, Brenda Beaty, Frederick A Masoudi, Mori J Krantz
Ultrasound contrast-enhanced stress echocardiography improves endocardial visualization, but diagnostic test rates versus stress myocardial perfusion imaging (MPI) have not been studied. A prospective randomized trial was performed between April 2012 and October 2014 at a single-center, safety net hospital. Hospitalized patients referred for noninvasive stress imaging were randomized 1:1 to stress echocardiography or stress MPI. The primary outcome was diagnostic test rate defined as interpretable images and achievement of >85% of age-predicted maximal heart rate (for dobutamine and exercise)...
June 2018: Critical Pathways in Cardiology
https://www.readbyqxmd.com/read/29766686/multimodal-approach-in-assessment-of-the-response-of-breast-cancer-to-neoadjuvant-chemotherapy
#7
Mikhail Viktorovich Pavlov, Tatyana Igorevna Kalganova, Yekaterina Sergeevna Lyubimtseva, Vladimir Ivanovich Plekhanov, German Yurievich Golubyatnikov, Olga Yevgenyevna Ilyinskaya, Anna Gennadjevna Orlova, Pavel Vladimirovich Subochev, Dmitriy Vladimirovich Safonov, Natalia Mikhailovna Shakhova, Anna Vladimirovna Maslennikova
The ability for noninvasive visualization of functional changes of a tumor's oxygenation and circulatory system offers new advantages for prognosis and monitoring of the treatment efficacy. The results of breast cancer oxygen state study under chemotherapy action obtained by diffuse optical spectroscopy (DOS) in combination with Doppler ultrasonic imaging are presented. Complex use of optical and ultrasound methods gives complementary information about the size of the tumor node, peculiarities of its vascular bed, rate of its blood flow as well as oxygenation, and provide a picture of the tumor response to treatment...
May 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29765443/management-of-cardiac-hemochromatosis
#8
Wilbert S Aronow
Iron-overload syndromes may be hereditary or acquired. Patients may be asymptomatic early in the disease. Once heart failure develops, there is rapid deterioration. Cardiac hemochromatosis is characterized by a dilated cardiomyopathy with dilated ventricles, reduced ejection fraction, and reduced fractional shortening. Deposition of iron may occur in the entire cardiac conduction system, especially the atrioventricular node. Cardiac hemochromatosis should be considered in any patient with unexplained heart failure...
April 2018: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/29765201/deposition-and-transport-of-linezolid-mediated-by-a-synthetic-surfactant-synsurf-%C3%A2-within-a-pressurized-metered-dose-inhaler-a-calu-3-model
#9
Lyné van Rensburg, Johann M van Zyl, Johan Smith
Background: Previous studies in our laboratory demonstrated that a synthetic peptide containing lung surfactant enhances the permeability of chemical compounds through bronchial epithelium. The purpose of this study was to test two formulations of Synsurf® combined with linezolid as respirable compounds using a pressurized metered dose inhaler (pMDI). Methods: Aerosolization efficiency of the surfactant-drug microparticles onto Calu-3 monolayers as an air interface culture was analyzed using a Next Generation Impactor™...
2018: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/29763773/ultrasound-doppler-as-an-imaging-modality-for-selection-of-murine-4t1-breast-tumors-for-combination-radiofrequency-hyperthermia-and-chemotherapy
#10
Martyna Krzykawska-Serda, Jason Chak-Shing Ho, Matthew J Ware, Justin J Law, Jared M Newton, Lam Nguyen, Mahdi Agha, Steven A Curley, Stuart J Corr
Noninvasive radiofrequency-induced (RF) hyperthermia has been shown to increase the perfusion of chemotherapeutics and nanomaterials through cancer tissue in ectopic and orthotopic murine tumor models. Additionally, mild hyperthermia (37°C-45°C) has previously shown a synergistic anticancer effect when used with standard-of-care chemotherapeutics such as gemcitabine and Abraxane. However, RF hyperthermia treatment schedules remain unoptimized, and the mechanisms of action of hyperthermia and how they change when treating various tumor phenotypes are poorly understood...
May 11, 2018: Translational Oncology
https://www.readbyqxmd.com/read/29763740/combining-magnetic-resonance-imaging-mri-and-medical-infrared-thermography-mit-in-the-pre-and-per-operating-management-of-severe-hidradenitis-suppurativa-hs
#11
Stéphane Derruau, Yohann Renard, Hervé Pron, Redha Taiar, Ellie Abdi, Guillaume Polidori, Sandrine Lorimier
Hidradenitis suppurativa (HS) is a chronic, inflammatory, and recurrent skin disease. Surgical excision of wounds appears to be the only curative treatment for the prevention of recurrence of moderate to severe stages. Magnetic resonance imaging (MRI) is a standard reference examination for the detection of HS peri-anal inflammatory fistula. In this case study, the use of real-time medical infrared thermography, in combination with MRI as appropriate imaging, is proposed. The aim is to assist surgeons in the pre- and peri-surgical management of severe perianal hidradenitis suppurativa with the intent to ensure that all diseased lesions were removed during surgery and therefore to limit recurrence...
May 12, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29760971/quantitative-characterization-of-turbidity-by-radiative-transfer-based-reflectance-imaging
#12
Peng Tian, Cheng Chen, Jiahong Jin, Heng Hong, Jun Q Lu, Xin-Hua Hu
A new and noncontact approach of multispectral reflectance imaging has been developed to inversely determine the absorption coefficient of μ a , the scattering coefficient of μs and the anisotropy factor g of a turbid target from one measured reflectance image. The incident beam was profiled with a diffuse reflectance standard for deriving both measured and calculated reflectance images. A GPU implemented Monte Carlo code was developed to determine the parameters with a conjugate gradient descent algorithm and the existence of unique solutions was shown...
May 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29760766/holistic-and-component-plant-phenotyping-using-temporal-image-sequence
#13
Sruti Das Choudhury, Srinidhi Bashyam, Yumou Qiu, Ashok Samal, Tala Awada
Background: Image-based plant phenotyping facilitates the extraction of traits noninvasively by analyzing large number of plants in a relatively short period of time. It has the potential to compute advanced phenotypes by considering the whole plant as a single object (holistic phenotypes) or as individual components, i.e., leaves and the stem (component phenotypes), to investigate the biophysical characteristics of the plants. The emergence timing, total number of leaves present at any point of time and the growth of individual leaves during vegetative stage life cycle of the maize plants are significant phenotypic expressions that best contribute to assess the plant vigor...
2018: Plant Methods
https://www.readbyqxmd.com/read/29760545/quantitative-assessment-of-hepatic-fibrosis-in-chronic-hepatitis-b-and-c-t1-mapping-on-gd-eob-dtpa-enhanced-liver-magnetic-resonance-imaging
#14
Shen Pan, Xiao-Qi Wang, Qi-Yong Guo
AIM: To assess the accuracy of Look-Locker on gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI) for staging liver fibrosis in chronic hepatitis B/C (CHB/C). METHODS: We prospectively included 109 patients with CHB or CHC who underwent a 3.0-Tesla MRI examination, including T1-weighted and Look-Locker sequences for T1 mapping. Hepatocyte fractions (HeF) and relaxation time reduction rate (RE) were measured for staging liver fibrosis...
May 14, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29760407/comparison-of-intensity-phase-retardation-and-local-birefringence-images-for-filtering-blebs-using-polarization-sensitive-optical-coherence-tomography
#15
Shinichi Fukuda, Akari Fujita, Deepa Kasaragod, Simone Beheregaray, Yuta Ueno, Yoshiaki Yasuno, Tetsuro Oshika
Polarization-sensitive optical coherence tomography (PS-OCT) allows the recording of depth-resolved polarimetric measurements. It has been reported that phase retardation and local birefringence images can noninvasively detect fibrotic area in blebs after glaucoma surgery. Evaluation of scar fibrosis in blebs is important not only for predicting bleb function, but also for planning revision trabeculectomy. Herein, we characterize the intensity, phase retardation, and local birefringence images of blebs using PS-OCT...
May 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29756350/selective-parathyroid-venous-sampling-in-primary-hyperparathyroidism-a-systematic-review-and-meta-analysis
#16
REVIEW
Kareem Ibraheem, Eman A Toraih, Antoine B Haddad, Mahmoud Farag, Gregory W Randolph, Emad Kandil
OBJECTIVE: Minimally invasive parathyroidectomy requires accurate preoperative localization techniques. There is considerable controversy about the effectiveness of selective parathyroid venous sampling (sPVS) in primary hyperparathyroidism (PHPT) patients. The aim of this meta-analysis is to examine the diagnostic accuracy of sPVS as a preoperative localization modality in PHPT. METHODS: Studies evaluating the diagnostic accuracy of sPVS for PHPT were electronically searched in the PubMed, EMBASE, Web of Science, and Cochrane Controlled Trials Register databases...
May 14, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29756243/narrow-band-imaging-for-risk-stratification-of-glottic-cancer-within-leukoplakia
#17
Anna Rzepakowska, Ewelina Sielska-Badurek, Michal Żurek, Ewa Osuch-Wójcikiewicz, Kazimierz Niemczyk
BACKGROUND: This study investigates relevance of narrow band imaging (NBI) in stratifying risk of malignant transformation within leukoplakia. METHODS: We conducted a prospective analysis that included 62 patients with 91 changes of leukoplakia on vocal folds. The NBI was obtained before microsurgery. Categorization of the lesion as benign was made when vessels of surrounding epithelium were classified as type I, II, or IV according to Ni classification. If there were visualized intraepithelial papillary capillary loops of type V, the lesion was classified as malignant...
May 13, 2018: Head & Neck
https://www.readbyqxmd.com/read/29756168/transsplenic-splenoportography-and-portal-venous-interventions-in-pediatric-patients
#18
Eric J Monroe, Ethan J Speir, C Matthew Hawkins, Giri Shivaram, Kevin S H Koo, Anne E Gill
BACKGROUND: Data regarding transsplenic portal venous access for diagnostic imaging and endovascular intervention in children are limited, possibly due to concerns regarding high bleeding risks and resultant underutilization. OBJECTIVE: To investigate the safety and utility of transsplenic splenoportography and portal venous interventions in children. MATERIALS AND METHODS: A retrospective review was performed of all pediatric patients undergoing percutaneous transsplenic portal venous access and intervention at two large tertiary pediatric institutions between January 2012 and April 2017 was performed...
May 13, 2018: Pediatric Radiology
https://www.readbyqxmd.com/read/29754996/dce-mri-in-human-gliomas-a-surrogate-for-assessment-of-invasive-hypoxia-marker-hif-1%C3%AE-based-on-mri-neuronavigation-stereotactic-biopsies
#19
Qian Xie, Juan Wu, Zunguo Du, Ningning Di, Ren Yan, Haopeng Pang, Teng Jin, Hua Zhang, Yue Wu, Yong Zhang, Zhenwei Yao, Xiaoyuan Feng
RATIONALE AND OBJECTIVES: The purpose of this study was to correlate dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) parameters with data from a specific marker of hypoxia, hypoxia-inducible factor 1α (HIF-1α), in human gliomas on a point-to-point basis by using coregistered magnetic resonance imaging and frameless stereotactic biopsies. MATERIALS AND METHODS: Thirty-four patients with treatment-naive gliomas underwent DCE, axial T1-weighted, T2-weighted, T2-weighted fluid acquisition of inversion recovery, and three-dimensional T1-weighted brain volume with gadolinium contrast enhancement sequences on a 3...
May 10, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29754774/evaluation-of-intraplaque-neovascularization-using-superb-microvascular-imaging-and-contrast-enhanced-ultrasonography
#20
Kazumasa Oura, Tadayoshi Kato, Hideki Ohba, Yasuo Terayama
BACKGROUND: Several studies have shown a linkage between intraplaque neovascularization (IPN) and plaque instability. Although contrast-enhanced ultrasonography (CEUS) may help visualize IPN in the carotid artery, its benefits are limited in Japan, where there is no health insurance coverage for contrast agents in medical imaging. Superb microvascular imaging (SMI), however, enables the depiction of low-velocity blood flow. The current study compares the diagnostic accuracy of SMI and CEUS in the evaluation of IPN...
May 10, 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
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