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The agricultural sector is pivotal to food security and economic stability worldwide. Corn holds particular significance in the global food industry, especially in developing countries where agriculture is a cornerstone of the economy. However, corn crops are vulnerable to various diseases that can significantly reduce yields. Early detection and precise classification of these diseases are crucial to prevent damage and ensure high crop productivity. This study leverages the VGG16 deep learning (DL) model to classify corn leaves into four categories: healthy, blight, gray spot, and common rust. Despite the efficacy of DL models, they often face challenges related to the explainability of their decision-making processes. To address this, Layer-wise Relevance Propagation (LRP) is employed to enhance the model's transparency by generating intuitive and human-readable heat maps of input images. The proposed VGG16 model, augmented with LRP, outperformed previous state-of-the-art models in classifying corn leaf diseases. Simulation results demonstrated that the model not only achieved high accuracy but also provided interpretable results, highlighting critical regions in the images used for classification. By generating human-readable explanations, this approach ensures greater transparency and reliability in model performance, aiding farmers in improving their crop yields.
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Objective: To investigate the compliance and clinical efficacy of vaginal dilators (VDs) as an educational intervention in patients receiving pelvic radiation therapy (RT) for endometrial and cervical malignancies. Material and methods: This is a single institution, retrospective chart review. Patients undergoing pelvic RT for endometrial or cervical cancer at our center were educated about the use of a VD starting 1 month after completion of RT. The patients were assessed after 3 months of prescribing VD. The demographic details and physical examination findings were extracted from medical records. Results: We identified 54 female patients at our institution during the 6-month duration. The median mean age of patients was 54 ± 9.9 years. Twenty-four (44.4%) had endometrial cancers and 30 (55.6%) were diagnosed with cervical cancers. All patients received external beam RT, 38 (70.4%) received a dose of 45 Gy, and 16 (29.6%) patients received 50.4 Gy. Brachytherapy was also received by all patients, 28 (51.9%) received 5 Gy × 2 fractions, 4 (7.4%) received 7 Gy × 3 fractions and 22 (40.7%) received 8 Gy × 3 fractions. The compliance with VD use was 36 (66.6%) patients. Twenty-two (40.7%) used 2-3 times a week, 8 (14.8%) used <2 times per week and 6 (11.9%) used only once a month, and 18 (33.3%) did not use the VD post-treatment. Per vaginal (PV) examination findings of the patient's vagina with normal mucosa were evaluated in 32 (59.3%) and adhesions were found in 20 (37.0%) and 2 (3.7%) were unable to examine due to dense adhesions. During examination 12 (22.2%) had bleeding PV, however, the majority of the patients, 42 (77.8%) experienced no bleeding PV. Out of the 36 patients who used a VD, it was found to be efficacious in 29 (80.6%) of patients. Upon stratification of efficacy with a frequency of VD, 72.4% (n = 21) efficacy was seen in patients using frequent VD as prescribed 2-3 times per week. Conclusion: The compliance and efficacy of VD use after radiation to pelvic in cervical and endometrial cancers at 3 months follow-up were found to be 66.6% and 80.6%, respectively. This shows that VD therapy is an effective interventional tool and patients should receive specialist education about vaginal stenosis as toxicity at the outset of treatment.
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Educación Médica , Humanos , Inteligencia Emocional , Grupo de Atención al PacienteRESUMEN
Radiotherapy (RT) is an important component of treatment in the management of breast cancer patients. The radiation treatment paradigm has been shifted towards hypofractionated RT. This study aims to determine the severity of acute dermatitis in patients receiving hypofractionated RT for breast cancer at a tertiary care university hospital in Pakistan. Patients with biopsy-proven invasive breast carcinoma or DCIS who were referred for radical radiotherapy after discussion in the breast tumour board were retrospectively reviewed. Physical assessment of the patients for evaluation of the severity of radiation dermatitis will be carried out in the first week, last week and on the first follow-up after 1 month of completion of RT, according to the Radiation Therapy Oncology Group/European Organisation For Research And Treatment Of Cancer (RTOG/EORTC) criteria. We identified 92 female patients in 6 months at Aga Khan University Hospital, with a mean age of 53.1 years. Most of the treated patients had clinical stage 3 (64%) cancer, while others were stage 2 (42%), stage 1 (2%) and stage 0 (2%). The surgeries performed were mastectomy in 59 patients and breast-conserving surgery in 33 patients. Histology was Intra Ductal Carcinoma (IDC) (95%), DCIS (3%) and Invasive Lobular Carcinoma (ILC) (2%). Most of the patients received chemotherapy (96%). Radiotherapy dose was 4256 cGy in 16 fractions, followed by a boost of 10 Gy. The radiation techniques used were intensity-modulated radiotherapy (47.8%) and three-dimensional conformal radiotherapy (52.2%). Most of the patients experienced no toxicity (59%), while grade I toxicity was observed in 29% of the patients and grade II toxicity was observed in 11%. Only 1% of the patients experienced grade III skin toxicity. Hypofractionated radiation therapy is beneficial because of the shorter overall treatment time which reduces the socio-economic burden, not only for patients but also for radiotherapeutic institutions. However, extended follow-up is to be reported for long-term toxicity and other consequences.
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The mortality rate of Breast Cancer in women has increased, both in west and east. Early detection is important to improve the survival rate of cancer patients. The manual detection and identification of cancer in whole slide images are critical and difficult tasks for pathologists. In this work, we introduce PMNet, a pipeline to detect regions with invasive characteristics in whole slide images. Our method employs scaled networks for detecting breast cancer in whole slide images. It classifies whole slide images on patch level into normal, benign, in situ and invasive tumors. Our approach yielded f1-score of 88.9(±1.7)% that outperforms the benchmark f1-score of 81.2(±1.3)% on patch level and achieved an average dice coefficient of 69.8% on 10 whole slide images compared to the benchmark average dice coefficient of 61.5% on BACH dataset. Similarly, on the dryad test dataset that comprises of 173 whole slide images, we achieved an average dice coefficient of 82.7% as compared to the previous state-of-art of 76% without fine-tuning on this dataset. We further proposed a method to generate patch level annotations for the image level TCGA breast cancer database that will be useful for future deep learning methods.
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Neoplasias de la Mama , Neoplasias de la Mama/diagnóstico por imagen , Femenino , Humanos , ProbabilidadRESUMEN
Burkholderia glumae, the primary causative agent of bacterial panicle blight in rice, has been reported as an opportunistic pathogen in patients with chronic infections. This study aimed to re-sequence the clinical isolate B. glumae strain AU6208 and comparatively analyze its genome using B. glumae strain BGR1 from rice plant as the reference. Re-sequencing results revealed that the genome of strain AU6208 comprised 96 contigs corresponding to a 6.1 Mbp genome of the strain AU6208, with 5322 coding sequences and 68.2 % GC content; this is much larger compared to the genome previously sequenced by us and described by Seo et al (2015), which was reported to be 4.1 Mbp comprising >1200 contigs, 4361 coding sequences, and 67.31 % GC content. Moreover, this updated genome shares >80 % identity to the 7.2 Mbp genome of BGR1, which encodes 6491 coding sequences and has 68.3 % GC content. Further computational analysis revealed that the strain AU6208 encodes several bacteriocin biosynthesis genes, antibiotic, as well as virulent genes such as toxoflavin genes, which included 425 specialty genes and 12 toxoflavin genes. Upon further characterization, 12 toxoflavins (ToxA, B, C, D, E, F, G, H, I, J, TofI, and TofR) were found in AU6208 with 70-100 % sequence, family, and domain similarity with that of BGR1. Upon comparison with BGR1, the structural characterizations of selected toxoflavin genes (ToxB, ToxC, ToxG, H, and TofI) revealed variations in 2D and 3D structures such as differences in α-helix, ß-sheets, loops, physiological properties of proteins, RMSD values, etc. These variations may play significant role in different mode of action in different hosts thereby indicating that in addition to their respective hosts, toxoflavins could also contribute to exploit other hosts across the kingdom. In addition to understanding the epidemiology of strain AU6208, this updated genomics data will also unfold the pathogenicity of bacteria in diversity of various hosts and anti-virulence.
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Proteínas Bacterianas/genética , Toxinas Bacterianas/genética , Burkholderia/genética , Genoma Bacteriano , Pirimidinonas , Triazinas , Burkholderia/patogenicidadRESUMEN
PURPOSE: To evaluate and report the frequency of changes in radiation therapy treatment plans after peer review in a simulation review meeting once a week. MATERIALS AND METHODS: Between July 1 and August 31, 2016, the radiation plans of 116 patients were discussed in departmental simulation review meetings. All plans were finalized by the primary radiation oncologist before presenting them in the meeting. A team of radiation oncologists reviewed each plan, and their suggestions were documented as no change, major change, minor change, or missing contour. Changes were further classified as changes in clinical target volume, treatment field, or dose. All recommendations were stratified on the basis of treatment intent, site, and technique. Data were analyzed by Statistical Package for the Social Sciences and are presented descriptively. RESULTS: Out of 116 plans, 26 (22.4%) were recommended for changes. Minor changes were suggested in 15 treatment plans (12.9%) and a major change in 10 (8.6%), and only one plan was suggested for missing contour. The frequency of change recommendations was greater in radical radiation plans than in palliative plans (92.3% v 7.7%). The head and neck was the most common treatment site recommended for any changes (42.3%). Most of the changes were recommended in the technique planned with three-dimensional conformal radiation therapy (50%). Clinical target volume (73.1%) was identified as the most frequent parameter suggested for any change, followed by treatment field (19.2%) and dose (0.08%). CONCLUSION: Peer review is an important tool that can be used to overcome deficiencies in radiation treatment plans, with a goal of improved and individualized patient care. Our study reports changes in up to a quarter of radiotherapy plans.
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Neoplasias/radioterapia , Órganos en Riesgo/efectos de la radiación , Revisión por Expertos de la Atención de Salud , Planificación de la Radioterapia Asistida por Computador/normas , Radioterapia de Intensidad Modulada/normas , Algoritmos , Humanos , Neoplasias/epidemiología , Variaciones Dependientes del Observador , Pakistán/epidemiología , Oncología por Radiación/normas , Dosificación Radioterapéutica , Planificación de la Radioterapia Asistida por Computador/métodos , Radioterapia de Intensidad Modulada/métodos , Centros de Atención Terciaria/normasRESUMEN
Primary spinal cord glioblastoma multiforme involving the conus medullaris is an uncommon entity with poor outcomes. An aggressive multimodality treatment approach has been used, but prognosis remains same. There are no guidelines for the treatment of patients with spinal glioblastoma multiforme (GBM). We highlight the case of a child diagnosed with conal GBM. He was treated with definitive surgery followed by adjuvant concurrent chemoradiation. After completion of treatment, he showed a temporary symptomatic improvement, but later on his condition deteriorated. We elaborate the stepwise treatment approach employed in this patient.
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OBJECTIVE: To evaluate handwashing behaviour 5 years after a handwashing intervention in Karachi, Pakistan. METHODS: In 2003, we randomised neighbourhoods to control, handwashing promotion, or handwashing promotion and water treatment. Intervention households were given soap +/- water treatment product and weekly handwashing education for 9 months. In 2009, we re-enrolled 461 households from the three study groups: control (160), handwashing (141), and handwashing + water treatment (160) and assessed hygiene-related outcomes, accounting for clustering. RESULTS: Intervention households were 3.4 times more likely than controls to have soap at their handwashing stations during the study visit [293/301 (97%) vs. 45/159 (28%), P < 0.0001]. While nearly all households reported handwashing after toileting, intervention households more commonly reported handwashing before cooking [relative risk (RR) 1.2 (95% confidence interval (CI) 1.0-1.4)] and before meals [RR 1.7 (95% CI, 1.3-2.1)]. Control households cited a mean of 3.87 occasions for washing hands; handwashing households, 4.74 occasions; and handwashing + water treatment households, 4.78 occasions (P < 0.0001). Households reported purchasing a mean of 0.65 (control), 0.91 (handwashing) and 1.1 (handwashing + water treatment) bars of soap/person/month (P < 0.0001). CONCLUSIONS: Five years after receiving handwashing promotion, intervention households were more likely to have soap at the household handwashing station, know key times to wash hands and report purchasing more soap than controls, suggesting habituation of improved handwashing practices in this population. Intensive handwashing promotion may be an effective strategy for habituating hygiene behaviours and improving health.