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https://www.readbyqxmd.com/read/29679848/a-deep-boltzmann-machine-driven-level-set-method-for-heart-motion-tracking-using-cine-mri-images
#1
Jian Wu, Thomas R Mazur, Su Ruan, Chunfeng Lian, Nalini Daniel, Hilary Lashmett, Laura Ochoa, Imran Zoberi, Mark A Anastasio, H Michael Gach, Sasa Mutic, Maria Thomas, Hua Li
Heart motion tracking for radiation therapy treatment planning can result in effective motion management strategies to minimize radiation-induced cardiotoxicity. However, automatic heart motion tracking is challenging due to factors that include the complex spatial relationship between the heart and its neighboring structures, dynamic changes in heart shape, and limited image contrast, resolution, and volume coverage. In this study, we developed and evaluated a deep generative shape model-driven level set method to address these challenges...
April 6, 2018: Medical Image Analysis
https://www.readbyqxmd.com/read/29679829/fulfilling-spawning-flow-requirements-for-potamodromous-cyprinids-in-a-restored-river-segment
#2
Isabel Boavida, Joaquim B Jesus, Vítor Pereira, Cátia Santos, Marisa Lopes, Rui M V Cortes
The Baixo Sabor hydroelectric scheme was recently constructed (began operating in 2015), blocking fish migration immediately at the river mouth. As a compensation measure for spawning habitat loss the Vilariça River which confluences with Sabor River, immediately downstream from the Baixo Sabor scheme, was chosen for rehabilitation site as an attempt to replace the spawning grounds lost in Sabor River for the potamodromous cyprinid Iberian barbel (Luciobarbus bocagei). Restoration activities included: placement of submerged weirs with fish ramps to increase the lotic/lentic sequence, bank reinforcement, boulder placement and river water profile increase...
April 18, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29679489/data-driven-motion-correction-will-replace-motion-tracking-devices-in-molecular-imaging-guided-radiation-therapy-treatment-planning
#3
Adam Kesner, Tinsu Pan, Habib Zaidi
The last decade has seen abundant literature demonstrating the advantages of hybrid imaging modalities combining morphological and molecular imaging in clinical oncology. Commercial systems merging SPECT and CT, PET and CT or PET and MRI are now widely used in the clinic and have had significant impact on patient management. Ultimately, molecular imaging-guided radiotherapy holds the promise of improved definition of tumor target volumes. However, respiratory motion management remains one of the main challenges of this technique...
April 21, 2018: Medical Physics
https://www.readbyqxmd.com/read/29679219/rf-ablation-pattern-shaping-employing-switching-channels-of-dual-bipolar-needle-electrodes-ex-vivo-results
#4
Jens Ziegle, Chloé Audigier, Johannes Krug, Ghazanfar Ali, Younsu Kim, Emad M Boctor, Michael Friebe
PURPOSE: Radiofrequency (RF) ablation with mono- or bipolar electrodes is a common procedure for hepatocellular carcinoma (HCC) with a low rate of recurrence for small size tumors. For larger lesions and/or non-round/ellipsoid shapes RF ablation has some limitations and generally does not achieve comparable success rates to microwave ablation or high-intensity focused ultrasound therapies. MATERIALS AND METHODS: To shape RF ablations for matching a tumor size and geometry, we have developed an electronic channel switch box for two bipolar needles that generates multiple selectable ablation patterns...
April 20, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29678900/prevention-of-exacerbations-in-patients-with-stable-non-cystic-fibrosis-bronchiectasis-a-systematic-review-and-meta-analysis-of-pharmacological-and-non-pharmacological-therapies
#5
Abd Moain Abu Dabrh, Adam T Hill, Claudia C Dobler, Noor Asi, Wigdan H Farah, Qusay Haydour, Zhen Wang, Khalid Benkhadra, Larry J Prokop, Mohammad Hassan Murad
BACKGROUND: Several pharmacological and non-pharmacological therapies are used to treat stable bronchiectasis of non-cystic fibrosis (CF) aetiology. OBJECTIVE: We conducted a systematic review and meta-analysis to assess the evidence of the effectiveness of pharmacological and non-pharmacological treatment options in patients with stable non-CF bronchiectasis with a focus on reducing exacerbations. STUDY SELECTION: Multiple databases were searched through September 2017...
April 20, 2018: BMJ evidence-based medicine
https://www.readbyqxmd.com/read/29678420/a-novel-validation-and-calibration-method-for-motion-capture-systems-based-on-micro-triangulation
#6
Gergely Nagymáté, Tamás Tuchband, Rita M Kiss
Motion capture systems are widely used to measure human kinematics. Nevertheless, users must consider system errors when evaluating their results. Most validation techniques for these systems are based on relative distance and displacement measurements. In contrast, our study aimed to analyse the absolute volume accuracy of optical motion capture systems by means of engineering surveying reference measurement of the marker coordinates (uncertainty: 0.75 mm). The method is exemplified on an 18 camera OptiTrack Flex13 motion capture system...
April 12, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29677039/time-to-reconsider-the-role-of-relative-blood-volume-monitoring-for-fluid-management-in-hemodialysis
#7
David F Keane, Paul Baxter, Elizabeth Lindley, Laura Rhodes, Sue Pavitt
Relative blood volume (RBV) monitoring during hemodialysis has been used to help guide fluid management for decades, although with little supporting evidence. The technique relies on the assumption that variation in RBV during fluid removal reflects the capacity for vascular refilling and that efficient refilling is related to fluid overload. This study investigated the relationship between RBV variation and bioimpedance-based fluid overload in 47 patients on stable hemodialysis. Mean treatment ultrafiltration volume (UFV) was 1...
April 18, 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29676967/municipal-solid-waste-generation-and-disposal-in-robe-town-ethiopia
#8
Duguma Erasu, Tesfaye Faye, Amaha Kiros, Abel Balew
The amount of solid waste generated in developing countries is rising from time to time due to economic growth, change in consumer behavior and lifestyles of people. But it is hard to manage and handle the increase of solid waste with existing waste management infrastructure. Thus, the management system of solid waste is very poor and become a serious problem. The main purpose of this study is to quantify the volume of solid waste generated and investigate factors affecting generation and disposal of wastes in the study area...
April 20, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29676892/multiple-pathways-to-bacterial-load-reduction-by-stormwater-best-management-practices-tradeoffs-in-performance-volume-and-treated-area
#9
Jordyn Wolfand, Colin D Bell, Alexandria B Boehm, Terri Hogue, Richard G Luthy
Stormwater best management practices (BMPs) are implemented to reduce microbial pollution in runoff, but their removal efficiencies differ. Enhanced BMPs, such as those with media amendments, can increase removal of fecal indicator bacteria (FIB) in runoff from 0.25-log10 to above 3-log10 ; however, their implications for watershed-scale management are poorly understood. In this work, a computational model was developed to simulate watershed-scale bacteria loading and BMP performance, using the Ballona Creek Watershed (Los Angeles County, CA) as a case study...
April 20, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29676695/huge-heterogeneity-in-survival-in-a-subset-of-adult-patients-with-resected-wild-type-isocitrate-dehydrogenase-status-who-grade-ii-astrocytomas
#10
Gaëtan Poulen, Catherine Gozé, Valérie Rigau, Hugues Duffau
OBJECTIVE World Health Organization grade II gliomas are infiltrating tumors that inexorably progress to a higher grade of malignancy. However, the time to malignant transformation is quite unpredictable at the individual patient level. A wild-type isocitrate dehydrogenase (IDH-wt) molecular profile has been reported as a poor prognostic factor, with more rapid progression and a shorter survival compared with IDH-mutant tumors. Here, the oncological outcomes of a series of adult patients with IDH-wt, diffuse, WHO grade II astrocytomas (AII) who underwent resection without early adjuvant therapy were investigated...
April 20, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29676691/defining-the-lateral-limits-of-the-endoscopic-endonasal-transtuberculum-transplanum-approach-anatomical-study-with-pertinent-quantitative-analysis
#11
Alberto Di Somma, Jorge Torales, Luigi Maria Cavallo, Jose Pineda, Domenico Solari, Rosa Maria Gerardi, Federico Frio, Joaquim Enseñat, Alberto Prats-Galino, Paolo Cappabianca
OBJECTIVE The extended endoscopic endonasal transtuberculum transplanum approach is currently used for the surgical treatment of selected midline anterior skull base lesions. Nevertheless, the possibility of accessing the lateral aspects of the planum sphenoidale could represent a limitation for such an approach. To the authors' knowledge, a clear definition of the eventual anatomical boundaries has not been delineated. Hence, the present study aimed to detail and quantify the maximum amount of bone removal over the planum sphenoidale required via the endonasal pathway to achieve the most lateral extension of such a corridor and to evaluate the relative surgical freedom...
April 20, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29676628/increasing-the-resolution-of-chronic-obstructive-pulmonary-disease-definition-lessons-from-a-cohort-with-remote-but-extensive-exposure-to-secondhand-tobacco-smoke
#12
Mehrdad Arjomandi, Siyang Zeng, Paul D Blanc, Warren M Gold
RATIONALE: The Global Initiative for Chronic Obstructive Lung Disease criteria require a ratio of forced expiratory volume in 1 second (FEV1 ) to forced vital capacity (FVC) (FEV1 /FVC) of less than 0.70 for the diagnosis of chronic obstructive pulmonary disease, whereas other criteria emphasize a lower limit of normal approach. However, the use of Global Initiative for Chronic Obstructive Lung Disease (or lower limit of normal) criteria may result in classification of many smokers with respiratory morbidities as not having chronic obstructive pulmonary disease...
April 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29676590/emphysema-management-from-investigational-endobronchial-coils-to-lung-transplantation
#13
Harpreet Singh Grewal, Atul C Mehta
This brief imaging case report highlights a successful bridge to lung transplantation after endobronchial coil assisted lung volume reduction procedure. Our patient was a 64-year-old male with severe emphysema (FEV1:19%, RV: 289%, TLC: 143%), on maximum medical regimen who was enrolled into the Lung Volume Reduction Coil Treatment (RENEW) Study. He underwent bilateral endobronchial coil placement in a two-step procedure, with an immediate improvement in symptoms and pulmonary function testing (FEV1:21%, RV: 254%, TLC: 138%)...
April 20, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29673182/assessing-the-impact-of-urbanization-on-direct-runoff-using-improved-composite-cn-method-in-a-large-urban-area
#14
Chunlin Li, Miao Liu, Yuanman Hu, Tuo Shi, Min Zong, M Todd Walter
Urbanization is one of the most widespread anthropogenic activities, which brings a range of physical and biochemical changes to hydrological system and processes. Increasing direct runoff caused by land use change has become a major challenge for urban ecological security. Reliable prediction of the quantity and rate of surface runoff is an inherently difficult and time-consuming task for large ungauged urban areas. In this study, we combined Geographic Information System and remote sensing technology with an improved Soil Conservation Service curve number model to evaluate the effects of land use change on direct runoff volume of the four-ring area in Shenyang, China, and analyzed trends of direct runoff at different scales...
April 17, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29669479/long-term-use-of-hydraulic-artificial-urethral-sphincters-in-nine-dogs-from-new-zealand-with-urethral-sphincter-mechanism-incompetence
#15
K R S Morgan, H R Milner, A Tikekar, H L Smith, A R Coomer
AIMS: To report on the long-term outcomes of hydraulic artificial urethral sphincter (HAUS) placement for the correction of urethral sphincter mechanism incompetence (USMI) in New Zealand dogs. METHODS: Retrospective data were obtained from cases of dogs which had a HAUS placed after failed medical and/or surgical management of USMI between August 2012 and November 2016. Owner assessment of urinary incontinence was evaluated by an online survey in May 2017 using a visual analogue scale (0 being normal, 100 being severely affected) for the frequency, volume and severity of any straining to urinate, immediately prior to the placement of the HAUS and at the time of the survey...
April 18, 2018: New Zealand Veterinary Journal
https://www.readbyqxmd.com/read/29667909/losartan-does-not-decrease-renal-oxygenation-and-norepinephrine-effects-in-rats-after-resuscitated-haemorrhage
#16
Sofia Jönsson, Jacqueline M Melville, Mediha Becirovic-Agic, Michael Hultström
Renin-angiotensin-system blockers are thought to increase the risk of acute kidney injury after surgery and haemorrhage. We found that Losartan does not cause renal cortical hypoxia after haemorrhage in rats because of decreased renal vascular resistance, but did not evaluate resuscitation. AIM: Study Losartan´s effect on renal cortical and medullary oxygenation, and norepinephrine´s vasopressor effect in a model of resuscitated haemorrhage. METHOD: After seven days Losartan (60 mg/kg/day) or control treatment, male Wistar rats were haemorrhaged 20 % of the blood volume and resuscitated with Ringer's Acetate...
April 18, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29667726/interventions-for-infantile-haemangiomas-of-the-skin
#17
REVIEW
Monica Novoa, Eulalia Baselga, Sandra Beltran, Lucia Giraldo, Ali Shahbaz, Hector Pardo-Hernandez, Ingrid Arevalo-Rodriguez
BACKGROUND: Infantile haemangiomas (previously known as strawberry birthmarks) are soft, raised swellings of the skin that occur in 3% to 10% of infants. These benign vascular tumours are usually uncomplicated and tend to regress spontaneously. However, when haemangiomas occur in high-risk areas, such as near the eyes, throat, or nose, impairing their function, or when complications develop, intervention may be necessary. This is an update of a Cochrane Review first published in 2011...
April 18, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29666713/comprehensive-treatment-of-severe-periodontal-and-periimplant-bone-destruction-caused-by-iatrogenic-factors
#18
Gregor-Georg Zafiropoulos, Andreas Parashis, Taha Abdullah, Evangelos Sotiropoulos, Gordon John
Dental implant success requires placement after periodontal therapy, with adequate bone volume, plaque control, primary stability, control of risk factors, and use of well-designed prostheses. This report describes the surgical and prosthetic management of a patient with severe iatrogenic periodontal/periimplant bone destruction. Methods. A 55-year-old female smoker with fixed partial dentures (FPDs) supported on teeth and implants presented with oral pain, swelling, bleeding, and a 10-year history of multiple implant placements and implants/prosthesis failures/replacements...
2018: Case Reports in Dentistry
https://www.readbyqxmd.com/read/29666180/thrombectomy-for-acute-ischemic-stroke-in-the-elderly-a-real-world-experience
#19
Ali Alawieh, Arindam Chatterjee, Wuwei Feng, Guilherme Porto, Jan Vargas, Ryan Kellogg, Aquilla S Turk, Raymond D Turner, M Imran Chaudry, Alejandro M Spiotta
INTRODUCTION: Completed randomized trials on endovascular thrombectomy (ET) did not independently assess the efficacy of ET in the elderly (≥80 years old) who were often excluded or under-represented in trials. There were also inconsistent criteria for patient selection in this population across the different trials. This work evaluates outcomes after ET for acute ischemic stroke (AIS) in the elderly at a high volume stroke center. METHODS: We reviewed all cases of AIS that underwent a direct aspiration first pass technique (ADAPT) thrombectomy for large vessel occlusions between March 2013 and October 2017 while comparing outcomes in the elderly with younger counterparts...
April 17, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29664455/physician-awareness-of-decompressive-hemicraniectomy-for-malignant-middle-cerebral-artery-infarction-in-saudi-arabia-and-the-gulf-countries
#20
Hosam M Al-Jehani, Abdulaziz Alsharydah, Seba A Rammal, Saleh S Baeesa, Mohammad Mekhlafi
OBJECTIVE: To explore the perspective on Decompressive craniectomy (DH) of each of these specialties to establish common grounds for improved clinical practice. METHODS: An electronic survey was distributed via email and social media groups to members of these specialties in Kingdom of Saudi Arabia and the Gulf countries. Local practices, common triggers for referral for DH, perceived outcomes of these procedures, individual impression of what constitutes good clinical outcomes were explored...
April 2018: Neurosciences: the Official Journal of the Pan Arab Union of Neurological Sciences
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