Choatehughes9742
A pan-Asian consensus was issued by the forum. It is hoped that this consensus will guide the development of future shielding policies throughout Asia.
Demonstrate the importance of combining multiple readers' opinions, in a context-aware manner, when establishing the reference standard for validation of artificial intelligence (AI) applications for,
chest radiographs. By comparing individual readers, majority vote of a panel, and panel-based discussion, we identify methods which maximize interobserver agreement and label reproducibility.
1100 frontal chest radiographs were evaluated for 6 findings airspace opacity, cardiomegaly, pulmonary edema, fracture, nodules, and pneumothorax. Each image was reviewed by six radiologists, first individually and then via asynchronous adjudication (web-based discussion) in two panels of three readers to resolve disagreements within each panel. We quantified the reproducibility of each method by measuring interreader agreement.
Panel-based majority vote improved agreement relative to individual readers for all findings. Most disagreements were resolved with two rounds of adjudication, which further improved reproddation. The manner in which differing opinions are resolved is shown to be important, and has not been previously explored.
This study aimed to conduct objective and subjective comparisons of image quality among abdominal computed tomography (CT) reconstructions with deep learning reconstruction (DLR) algorithms, model-based iterative reconstruction (MBIR), and filtered back projection (FBP).
Datasets from consecutive patients who underwent low-dose liver CT were retrospectively identified. Images were reconstructed using DLR, MBIR, and FBP. Mean image noise and contrast-to-noise ratio (CNR) were calculated, and noise, artifacts, sharpness, and overall image quality were subjectively assessed. Dunnett's test was used for statistical comparisons.
Ninety patients (67 ± 12.7 years; 63 males; mean body mass index [BMI], 25.5 kg/m
) were included. The mean noise in the abdominal aorta and hepatic parenchyma of DLR was lower than that in FBP and MBIR (
< .001). For FBP and MBIR, image noise was significantly higher for obese patients than for those with normal BMI. The CNR for the abdominal aorta and hepatic parenchyma was higher for DLR than for FBP and MBIR (
< .001). MBIR images were subjectively rated as superior to FBP images in terms of noise, artifacts, sharpness, and overall quality (
< .001). DLR images were rated as superior to MBIR images in terms of noise (
< .001) and overall quality (
= .03).
Based on objective and subjective comparisons, the image quality of DLR was found to be superior to that of MBIR and FBP on low-dose abdominal CT. DLR was the only method for which image noise was not higher for obese patients than for those with a normal BMI.
This study provides previously unavailable information on the properties of DLR systems and their clinical utility.
This study provides previously unavailable information on the properties of DLR systems and their clinical utility.Background The endogenous cannabinoid system modulates inflammatory signaling in a variety of pathological states, including traumatic brain injury (TBI). The selective expression of diacylglycerol lipase-β (DAGL-β), the 2-arachidonylglycerol biosynthetic enzyme, on resident immune cells of the brain (microglia) and the role of this pathway in neuroinflammation, suggest that this enzyme may contribute to TBI-induced neuroinflammation. Accordingly, we tested whether DAGL-β-/- mice would show a protective phenotype from the deleterious consequences of TBI on cognitive and neurological motor functions. Materials and Methods DAGL-β-/- and -β+/+ mice were subjected to the lateral fluid percussion model of TBI and assessed for learning and memory in the Morris water maze (MWM) Fixed Platform (reference memory) and Reversal (cognitive flexibility) tasks, as well as in a cued MWM task to infer potential sensorimotor/motivational deficits. In addition, subjects were assessed for motor behavior (Rotarod and the Neuroloic and antiapoptotic pathways), in which DAGL-β deletion modestly altered levels of select species. Conclusions These findings indicate that although DAGL-β does not play a necessary role in TBI-induced cognitive and neurological function, it appears to contribute to the increased vulnerability of male mice to TBI-induced mortality, whereas female mice show high survival rates irrespective of DAGL-β expression.Aim Delayed diagnosis of transthyretin amyloid cardiomyopathy (ATTR-CM) represents a missed opportunity for intervention. This study estimates the health benefits of timely diagnosis and treatment with tafamidis. Methods A disease simulation model was developed to predict health outcomes under scenarios of timely and delayed diagnosis and treatment. Efficacy and quality of life (QoL) profiles were derived from the pivotal tafamidis trial and diagnostic delay durations from the literature. Results Timely diagnosis and treatment were predicted to extend mean life expectancy by 5.46 and 7.76 years, relative to delayed diagnosis, for wild-type and hereditary ATTR-CM, respectively. Corresponding QALY gains were 4.50 and 6.22. Conclusion Timely diagnosis and treatment with tafamidis are predicted to significantly improve survival and QoL for ATTR-CM patients.Background Cannabis plants and their seed have been used in many cultures as a source of medicine and feeding during history. Today, there is an increasing demand for cannabis seeds for medical use. Moreover, a seed sales market with no legal regulations has also grown. Curzerene cell line This may pose some issues if a quality control is not set in place. Identification of cannabis strains is important for quality control purposes in a nonregulated growing market and in cases of illegal traffic and medical use. Owing to the high price as a pharmacological drug, commercial products of cannabis plants and seeds for medical users are often subjected to adulterations, either when packing or distributing certified seeds in the market. Materials and Methods Cannabis commercial seeds and cannabis seeds for medical use were analyzed with high-resolution melting (HRM) analysis using barcoding markers. Humulus lupulus L. plants from a local market were used as outgroup control. DNA barcoding uses specific regions of the genome to identify differences in the genetic sequence of conserved regions such as internal transcribed spacer (ITS) and rbcL. DNA barcoding data can be generated with real-time polymerase chain reaction combined with HRM analysis to distinguish specific conserved DNA regions of closely related species. HRM analysis is the method of choice for rapid analysis of sequence variation. Results The melting temperature (Tm) of homogeneous packages was consistent with single genotypes. However, packages containing contaminating seeds showed Tm differences of 0.2°C on average. Conclusions An effective, rapid, and low-cost method based on ITS nuclear DNA and on chloroplast rbcL regions for screening and detection of contamination in commercial cannabis seeds was developed and applied for the analysis of different samples. This approach can be used as a quality control tool for cannabis seeds or other plant material.Background Cannabidiol (CBD) products are increasingly available to consumers in the United States and are subject to regulation by the U.S. Food and Drug Administration (FDA). CBD products cannot be marketed as unapproved new drugs with claims of therapeutic benefit. In addition, because CBD is the active ingredient in a FDA-approved CBD product, Epidiolex, CBD cannot be marketed as, or in, food products or dietary supplements. The FDA has issued Warning Letters to promote voluntary regulatory compliance. These letters provide insights as to the types of violations for CBD products detected in the U.S. market. Objective The goal of this retrospective study was to content analyze Warning Letters issued by the FDA to identify illicit marketing of CBD products. Design Warning Letters issued by the FDA between 2015 and 2019 were content analyzed using a deductive approach. We extracted year of issuance, issuing office, and claim types that are currently prohibited by the FDA, including (i) unapproved new drug, (claims that promote therapeutic benefits and as dietary supplements. Efforts are needed to regulate and monitor illicit advertising so consumers are not misled about the risks and benefits of CBD use.Purpose No prior study has been published on suicide-related behaviors among gay, bisexual, transgender, and queer (GBTQ) men in Singapore, where sexual relations between men are criminalized. This study explores the association and mediational pathways between experienced homophobia and suicidal ideation or suicide attempts among young GBTQ men in Singapore. Methods Results of this study were derived from baseline data of the Pink Carpet Y Cohort Study, Singapore's first prospective cohort study among young GBTQ men. The sample comprised 570 young GBTQ men 18 to 25 years of age who were HIV negative or unsure of their HIV status. Statistical analyses were conducted through descriptive statistics, multivariable logistic regression, and structural equation modeling techniques. Results Of 570 participants, 58.9% (n = 308) reported ever contemplating suicide, whereas 14.2% (n = 76) had ever attempted suicide. Controlling for key demographic variables, multivariable logistic regression revealed that experienced homophobia and depression severity were positively associated with a history of suicidal ideation, whereas depression severity and outness were positively associated with a history of suicide attempts. Mediation analyses revealed that depression severity and self-esteem partially accounted for the relationship between experienced homophobia and suicidal ideation, whereas depression severity and outness partially accounted for the relationship with suicide attempts. Conclusions The prevalence of suicidal ideation and past suicide attempts was found to be high in a sample of young GBTQ men in Singapore. Interventions to address experienced homophobia and discrimination among young GBTQ men are needed urgently in Singapore.Introduction Ayurveda and Siddha are two important components of the traditional Indian medicine (TIM). The regulatory mechanisms have been insufficient, and heavy metal toxicity with TIM preparations continues to be a public health nuisance, putting integrated medicine practice in jeopardy. The current study was undertaken to review the potential health hazards of the heavy metal content in the TIM and formulate patient-safety recommendations for integrative medical practice. Materials and Methods Systematic MEDLINE searches were performed using a combination of relevant MeSH terms and keywords, and case report/series of Ayurveda or Siddha-induced heavy metal toxicity, published in the previous two decades, were included. Risk of bias was assessed with the tool by Murad et al. Results A total of 220 cases (51 case reports and 14 case series) were found (lead, n = 156; arsenic, n = 11; mercury, n = 47; thallium, n = 1; gold, n = 1; combination of heavy metals, n = 4) after screening for the inclusion and exclusion criteria.
