Commonwealth poetry (English) -- History and criticism.

Magic.

18th century.

18th - 19th century.

18th century.

18th century.

18th - 19th century.

19th century.

19th century.

19th century.

19th century.

19th century.

19th century.

19th century.

19th century.

19th century.

19th century.

19th century.

19th century.

19th century.

18th - 19th century.

18th - 19th century.

18th - 19th century.

18th century.

Segmentation of cardiac images, particularly late gadolinium-enhanced magnetic resonance imaging (LGE-MRI) widely used for visualizing diseased cardiac structures, is a crucial first step for clinical diagnosis and treatment. However, direct segmentation of LGE-MRIs is challenging due to its attenuated contrast. Since most clinical studies have relied on manual and labor-intensive approaches, automatic methods are of high interest, particularly optimized machine learning approaches. To address this, we organized the "2018 Left Atrium Segmentation Challenge" using 154 3D LGE-MRIs, currently the world's largest cardiac LGE-MRI dataset, and associated labels of the left atrium segmented by three medical experts, ultimately attracting the participation of 27 international teams. In this paper, extensive analysis of the submitted algorithms using technical and biological metrics was performed by undergoing subgroup analysis and conducting hyper-parameter analysis, offering an overall picture of the major design choices of convolutional neural networks (CNNs) and practical considerations for achieving state-of-the-art left atrium segmentation. Results show the top method achieved a dice score of 93.2% and a mean surface to a surface distance of 0.7 mm, significantly outperforming prior state-of-the-art. Particularly, our analysis demonstrated that double, sequentially used CNNs, in which a first CNN is used for automatic region-of-interest localization and a subsequent CNN is used for refined regional segmentation, achieved far superior results than traditional methods and pipelines containing single CNNs. This large-scale benchmarking study makes a significant step towards much-improved segmentation methods for cardiac LGE-MRIs, and will serve as an important benchmark for evaluating and comparing the future works in the field.

Jasper Akerboom
Oct 3, 2012; 32:13819-13840
Cellular

Georg S. Kranz
Nov 12, 2014; 34:15466-15475
Systems/Circuits

Jasper Akerboom
Oct 3, 2012; 32:13819-13840
Cellular

Geoffrey M. Boynton
Jul 1, 1996; 16:4207-4221
Articles

The controversial series stems from the museum's desire to reach a younger generation by telling history in new ways

A young white bear from Manitoba while lazily enjoying a soft snowfall. It is morning in Hudson Bay, Canada, and the bear has just woken up. I succeeded in capturing it at an extreme temperature (-26 °), in a surreal silence, after observing its habits for a few days. The polar bear spends most of its time sleeping and lounging in the snow. It only moves when it's hungry. To hunt its favorite prey - the seal - it is willing to walk hundreds of miles. Its refined nose allowes the bear to sneak up on its prey with a paw when the seal rises to the surface to breathe.

A virus that spreads fear and stigma, as well as disease. It’s the story of HIV/AIDS as well as COVID-19. The former executive director of AIDS Thunder Bay reflects on the similarities he sees between HIV 35 years ago, and the coronavirus now.

Every day there is something or the other happening in the entertainment industry the proceeds of which are being given away for fighting the corona crisis.

Repair site iFixit has shared x-ray photographs of the new Magic Keyboard for iPad Pro, and they reveal an accessory more complicated than it might appear from the outside.

The success of Apple's AirPods line did better than the company "could ever imagine," Apple VP of product marketing Greg Joswiak claims in a profile on the audio accessories' popularity, one that also reveals extensive resources have been put into mapping ears.

Young Mexicans are challenged to do their part in missions during a conference in August, in which OM participated.

OM EAST offers a special start to the new school term for hundreds of children in Bosnia-Herzegovina.

NEW YORK, USA (AP) — Queen Latifah, Rebecca Breeds, and Thomas Middleditch are set to star in three new CBS shows for the 2020-21 season as the network adds a reimagined Equalizer, a show based on The Silence of the Lambs and a comedy about organ donation.

IF you’re under 40, or as I like to call it these days, "pre-arthritis", you probably won’t remember the dark days of malbec when you had a 50-50 chance of opening something that would be as rough as sandpaper.

Cross-sectional imaging can reduce the negative appendectomy rate (NAR) in children being evaluated for suspected appendicitis; however, the ability of diagnostic imaging to decrease NAR may vary by age and gender.

Cross-sectional imaging leads to a significant reduction in NAR for children younger than 5 years and girls older than 10 years. For boys older than 5 years being evaluated for uncomplicated appendicitis, advanced imaging appears to have limited value. (Read the full article)

Retinal hemorrhages occur in accidental and inflicted traumatic brain injury (ITBI) and some medical encephalopathies. Large numbers and peripherally located retinal hemorrhages are frequently cited as distinguishing features of ITBI in infants, but the predictive value has not been established.

This prospective retinal imaging study found that a diagnosis of ITBI in infants and children can be distinguished from other traumatic and nontraumatic causes by the presence of >25 dot-blot (intraretinal layer) hemorrhages (positive predictive value = 93%). (Read the full article)

Medical imaging that uses ionizing radiation provides notable benefits in the clinical setting. Controversy regarding increased cancer risk, particularly in children, dictates that ordering practices and use of such medical imaging be evaluated to reduce unnecessary exposure to imaging-related radiation.

We evaluated the prevalence and characteristics of diagnostic imaging procedures in children. The proportion of higher radiation procedures is increasing, especially among children evaluated in the inpatient and emergency department settings and those with gastrointestinal and neurologic symptoms, and congenital anomalies. (Read the full article)

Gaining intravenous access in children can be difficult. Recently, several near-infrared devices have been introduced attempting to support intravenous cannulation by visualizing veins underneath skin. Only one of those devices has been evaluated systemically thus far and results are inconclusive.

Although it was possible to visualize veins with near-infrared in most patients, the VascuLuminator did not improve the success of cannulation. An explanation is that the main problem is probably not localization of the vein but insertion of the cannula. (Read the full article)

Because pediatric appendicitis is challenging to diagnose, computed tomography (CT) is used frequently. Childhood radiation exposure is associated with increased risk of cancer. Ultrasound avoids radiation exposure but is less sensitive for appendicitis than CT.

Controlling for referral bias, evaluation at a community compared with a children’s hospital is associated with higher CT and lower ultrasound use before appendectomy. CT and ultrasound accuracy for appendicitis in children varies with hospital type. (Read the full article)

There is a lack of consensus regarding the optimal investigative approach after a first febrile urinary tract infection. This is because of uncertainty regarding the long-term clinical significance of vesicoureteral reflux and urinary tract infection–related renal scarring.

No ideal diagnostic algorithm exists. We found marked variability in sensitivity and specificity for detection of abnormalities using current protocols. We also highlight the considerable cost differences, both financially and in terms of radiation dose, of different protocols. (Read the full article)

Computed tomography is commonly used for neuroimaging in newborn infants with neonatal encephalopathy despite concerns over potential harm from radiation exposure. Alternative neuroimaging options include MRI and cranial ultrasound.

Using a very large, international, multicenter database, we demonstrate utilization rates and compare diagnostic findings of computed tomography, MRI, and cranial ultrasound in the evaluation of neonatal encephalopathy. (Read the full article)