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242 results on '"Omar Sultan"'

1. Comparative Analysis of Hand-Crafted and Machine-Driven Histopathological Features for Prostate Cancer Classification and Segmentation

Author

Baqain, Feda Bolus Al and Al-Kadi, Omar Sultan

Subjects
Electrical Engineering and Systems Science - Image and Video Processing, Computer Science - Computer Vision and Pattern Recognition, Computer Science - Machine Learning, Quantitative Biology - Quantitative Methods
Abstract

Histopathological image analysis is a reliable method for prostate cancer identification. In this paper, we present a comparative analysis of two approaches for segmenting glandular structures in prostate images to automate Gleason grading. The first approach utilizes a hand-crafted learning technique, combining Gray Level Co-Occurrence Matrix (GLCM) and Local Binary Pattern (LBP) texture descriptors to highlight spatial dependencies and minimize information loss at the pixel level. For machine driven feature extraction, we employ a U-Net convolutional neural network to perform semantic segmentation of prostate gland stroma tissue. Support vector machine-based learning of hand-crafted features achieves impressive classification accuracies of 99.0% and 95.1% for GLCM and LBP, respectively, while the U-Net-based machine-driven features attain 94% accuracy. Furthermore, a comparative analysis demonstrates superior segmentation quality for histopathological grades 1, 2, 3, and 4 using the U-Net approach, as assessed by Jaccard and Dice metrics. This work underscores the utility of machine-driven features in clinical applications that rely on automated pixel-level segmentation in prostate tissue images., Comment: 13 pages, 14 figures, 2 tables

Published
2025
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2. Canadian national electrophysiology ablation registry report 2011–2016

Author

Anna Kaoutskaia, Mohammed Shurrab, Guy Amit, Ratika Parkash, Derek Exner, Satish Toal, Laurence Sterns, Jean-Francois Sarrazin, Vijay Chauhan, Omar Sultan, Girish Nair, Marc Deyell, Laurent Macle, Steve Klassen, Benedict Glover, and Eugene Crystal

Subjects
Cardiac catheter ablation, Survey, Registry, Invasive electrophysiology, Arrhythmia, Public aspects of medicine, RA1-1270
Abstract

Abstract Background/purpose : Interventional cardiac electrophysiology (EP) is a rapidly evolving field in Canada; a nationwide registry was established in 2011 to conduct a periodic review of resource allocation. Methods The registry collects annual data on EP lab infrastructure, imaging, tools, human resources, procedural volumes, success rates, and wait times. Leading physicians from each EP lab were contacted electronically; participation was voluntary. Results All Canadian EP centres were identified (n = 30); 50 and 45 % of active centres participated in the last 2 instalments of the registry. A mean of 508 ± 270 standard and complex catheter ablation procedures were reported annually for 2015–2016 by all responding centres. The most frequently performed ablation targets atrial fibrillation (PVI) arrhythmia accounting for 36 % of all procedures (mean = 164 ± 85). The number of full time physicians ranges between 1 and 7 per centre, (mean = 4). The mean wait time to see an electrophysiologist for an initial non-urgent consult is 23 weeks. The wait time between an EP consult and ablation date is 17.8 weeks for simple ablation, and 30.1 weeks for AF ablation. On average centres have 2 (range: 1–4) rooms equipped for ablations; each centre uses the EP lab an average of 7 shifts per week. While diagnostic studies and radiofrequency ablations are performed in all centres, point-by-point cryoablation is available in 85 % centres; 38 % of the respondents use circular ablation techniques. Conclusions This initiative provides contemporary data on invasive electrophysiology lab practices. The EP registry provides activity benchmarks on national trends and practices.

Published
2021
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11. Assessment of texture measures susceptibility to noise in conventional and contrast enhanced computed tomography lung tumour images

Author

Al-Kadi, Omar Sultan

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Noise is one of the major problems that hinder an effective texture analysis of disease in medical images, which may cause variability in the reported diagnosis. In this paper seven texture measurement methods (two wavelet, two model and three statistical based) were applied to investigate their susceptibility to subtle noise caused by acquisition and reconstruction deficiencies in computed tomography (CT) images. Features of lung tumours were extracted from two different conventional and contrast enhanced CT image data-sets under filtered and noisy conditions. When measuring the noise in the background open-air region of the analysed CT images, noise of Gaussian and Rayleigh distributions with varying mean and variance was encountered, and Fisher distance was used to differentiate between an original extracted lung tumour region of interest (ROI) with the filtered and noisy reconstructed versions. It was determined that the wavelet packet (WP) and fractal dimension measures were the least affected, while the Gaussian Markov random field, run-length and co-occurrence matrices were the most affected by noise. Depending on the selected ROI size, it was concluded that texture measures with fewer extracted features can decrease susceptibility to noise, with the WP and the Gabor filter having a stable performance in both filtered and noisy CT versions and for both data-sets. Knowing how robust each texture measure under noise presence is can assist physicians using an automated lung texture classification system in choosing the appropriate feature extraction algorithm for a more accurate diagnosis., Comment: 10 pages, 9 figures

Published
2015
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18. Tumour grading and discrimination based on class assignment and quantitative texture analysis techniques

Author

Al-Kadi, Omar Sultan

Subjects
616.994, RC0078.7.D53 Diagnostic imaging
Abstract

Medical imaging represents the utilisation of technology in biology for the purpose of noninvasively revealing the internal structure of the organs of the human body. It is a way to improve the quality of the patient's life through a more precise and rapid diagnosis, and with limited side-effects, leading to an effective overall treatment procedure. The main objective of this thesis is to propose novel tumour discrimination techniques that cover both micro and macro-scale textures encountered in computed tomography (CI') and digital microscopy (DM) modalities, respectively. Image texture can provide significant information on the (ab)normality of tissue, and this thesis expands this idea to tumour texture grading and classification. The fractal dimension (FO) as a texture measure was applied to contrast enhanced CT lung tumour images in an aim to improve tumour grading accuracy from conventional CI' modality, and quantitative performance analysis showed an accuracy of 83.30% in distinguishing between advanced (aggressive) and early stage (non-aggressive) malignant tumours. A different approach was adopted for subtype discrimination of brain tumour OM images via a set of statistical and model-based texture analysis algorithms. The combined Gaussian Markov random field and run-length matrix texture measures outperformed all other combinations, achieving an overall class assignment classification accuracy of 92.50%. Also two new histopathological multi resolution approaches based on applying the FO as the best bases selection for discrete wavelet packet transform, and when fused with the Gabor filters' energy output improved the accuracy to 91.25% and 95.00%, respectively. While noise is quite common in all medical imaging modalities, the impact of noise on the applied texture measures was assessed as well. The developed lung and brain texture analysis techniques can improve the physician's ability to detect and analyse pathologies leading for a more reliable diagnosis and treatment of disease.

Published
2009

20. Evaluating the Various Reasons and Causes for Odontophobia Among Saudi Parents Accompanying Pediatric Patients at King Khalid University, Saudi Arabia.

Author

Zakirulla, Meer, Alqahtani, Ali Mushabab S., Ali Alshehri, Ali Abdulrahman, Almofreh, Feras Mohammed, Altimni, Omar Ali Y., Ali Albwahi, Nawaf Hassan, Alamri, Mohammed Saleem A., Asiri, Samiyah Ahmed, Otayf, Yahya Mohammed, Asiri, Saeed Ahmed, Alzaid, Raghad Mohammed S., Ruwayni, Ahmed Ibrahim, alharthi, Omar sultan, and Alwadaani, Mohammad Abdullah

Subjects
FEAR of dentists, CHILD patients, PARENTS, KINGS & rulers, DENTAL care utilization, DENTAL clinics
Abstract

Study Design: Cross-sectional Objective: This study evaluated the various reasons and causes for odontophobia among Saudi parents accompanying pediatric patients at King Khalid University, Saudi Arabia. Methods: A cross-sectional study was carried out on a total number of 300 parents (Male=150; Female=150) who participated in the study with age ranges from 30- to 55-year-old to know the various reasons and causes for odontophobia among Saudi parents accompanying pediatric patients attending dental clinic in college of dentistry, King Khalid University, Abha. The Questionnaire was given to Saudi parents accompanying pediatric patients attending dental clinics and data was collected from them. The data were entered and analyzed using the Statistical Package for the Social Sciences (SPSS 20). A P-value of less than 0.05 was considered to be statistically significant. Results: The majority of participants, 189(63%) were, said that they have experience of dental fear and anxiety in their lifetime period. 255(85%) agreed that they have come across one of their relatives or friends having the fear of dental treatment. Parents experienced various reasons for the cause of their dental fear, one of the major factors for dental fear they told was having the dentist remove their tooth (26%). Parents 155 (52%) stated that they visited dental clinic for treatment very often and 66(22%) visited rarely. Conclusions: Recognizing the level of fear that prevents patients from seeking dental care and understanding the occurrence of dental anxiety hold crucial importance in dental practice. While only a small percentage of subjects reported dental fear or would consider refusing dental consultations, assessing dental fear provides valuable insights for dental practitioners. However, there is a call for further research and efforts to enhance the comprehension of dental anxiety and behaviors during dental visits. [ABSTRACT FROM AUTHOR]

Published
2024

25. PURPOSE OF NURSES IN INFECTION CONTROL AND PREVENTION IN MEDICAL MANAGEMENT. A NEW APPRAISAL

Author

Omar, Abdullah Hussein Ali Al, Samhah Mosfoh Saud Al Salem, Omar, Sultan Huseein Ali Al, Alyami, Salem Mufarrih Mohammed, and Fatmah Masfoh Saud Al Salem

Subjects
Role Nurses Infection Prevention Control Health
Abstract

Infection Control activity works in tandem with all healthcare disciplines to provide quality patient care through education and practical application of the principles of microbiology, epidemiology, and infection prevention and control.Infection prevention and control (IPC) is a practical, evidence-based approach that prevents patients and health workers from being harmed by avoidable infection as a result of antimicrobial resistance. No one should catch an infection while receiving health care, yet, these infections can spread through outbreaks and many regular care practices, affecting hundreds of millions of people across the world every year. Infection prevention and control is one of the first topics introduced in nursing programs, yet its main tenets are often lost or forgotten. Objectives:The main objective of these guidelines is to prevent the health care workers and the environment from the transmission of infections. The specific objectives of these guidelines are to provide directions and information in relation to facilities, equipment, and procedures necessary to implement standard and additional (transmission-based) precautions for control of infections Cleaning, disinfecting and reprocessing of reusable equipment, Waste management, Protection of health care workers from transmissible infections, Prevention of HAI in patients, Infection control practices in special situations. &nbsp

Published
2023
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26. EEFFECTS OF VIDEO-ASSISTED TEACHING PROGRAM ON KNOWLEDGE OF UPPER RESPIRATORY INFECTION MANAGEMENT AND PREVENTION AMONG PARENTS OF THE CHILDREN UNDER FIVE YEARS OLD, FARASAN, KINGDOM OF SAUDI ARABIA

Author

Santhi Muttipoll Dharmarajlu, Sadeem yahya Najmi, Salha Adnan Edriss, Khloud Ahmed Redhwan, Soad Omar Sultan, and Hayam Ahmed

Abstract

Among children, Acute Upper Respiratory Infections constitutes a leading cause of morbidity and mortality. It accounts for 4 million of the 15 million child deaths in the world, annually. Globally, 30-60% of paediatric outpatient attendance and 20-30% of hospital admissions are due to Acute upper respiratory tract infections. Mothers are the main caregivers for their children, so their behaviours may be used as a disease prevention technique. The aim of the study is to identify the parent’s knowledge and practice of upper respiratory tract infection of children with under five age groups. Pre experimental design was used and 104 parents were selected by using of purposive sampling technique. The knowledge and practice were assessed by using structured interview schedule and checklist. The results of the study shows that in knowledge the total mean score for pre-test was 2.33±0.886, whereas in post-test it was 8.89±0.81 with the mean difference of 6.56. It shows that parents had excellent knowledge on Upper respiratory tract infections after implementation of educational programme, it shows that teaching was more effective. The overall mean score for practice on Upper respiratory tract infections shows that, in pre-test the mean score was 6.85±1.413, whereas in post-test it was 20.49±1.115, with the mean difference of 13.64. It predicts that parents were improved their practice after implementation of education programme on Upper respiratory tract infections preventive measures. The calculated ‘t’ value for awareness and practice scores were 7.24 & 2.914 at 0.05 level respectively. Hence it shows that significant improvement of parents knowledge and practice of Upper respiratory tract infections after implementation of educational programme. Infection prevention is critical in children under the age of five, as is thorough handwashing while caring for children who have respiratory infections. The researchers proposed that special instructional and educational programs for mothers be conducted to inform them about the preventive measures that should be taken to avoid upper respiratory tract disease.

Published
2022
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31. How Catastrophe Can Change Personality: Why EPCACE Is a Clinically Useful Diagnosis

Author

Tanaka, Gen, Tang, Hansen, Haque, Omar Sultan, and Bursztajn, Harold J.

Subjects
Diagnosis, Care and treatment, Suffering, Diseases
Abstract

Any psychiatric diagnosis has the potential for empowering the clinician to treat the patient's suffering as well as inspiring the patient to participate in an effective treatment. Alas, diagnosis also [...]

Published
2019

32. Evaluating the Various Reasons and Causes for Odontophobia Among Saudi Parents Accompanying Pediatric Patients at King Khalid University, Saudi Arabia.

Author

Zakirulla, Meer, Alqahtani, Ali Mushabab S., Alshehri, Ali Abdulrahman Ali, Almofreh, Feras Mohammed, Altimni, Omar Ali Y., Albwahi, Nawaf Hassan Ali, Alamri, Mohammed Saleem A., Asiri, Samiyah Ahmed, Otayf, Yahya Mohammed, Asiri, Saeed Ahmed, Alzaid, Raghad Mohammed S., Ruwayni, Ahmed Ibrahim, alharthi, Omar sultan, and Alwadaani, Mohammad Abdullah

Subjects
FEAR of dentists, CHILD patients, PARENTS, DENTAL care utilization, DENTAL clinics
Abstract

Study Design: Cross-sectional Objective: This study evaluated the various reasons and causes for odontophobia among Saudi parents accompanying pediatric patients at King Khalid University, Saudi Arabia. Methods: A cross-sectional study was carried out on a total number of 300 parents (Male=150; Female=150) who participated in the study with age ranges from 30- to 55-year-old to know the various reasons and causes for odontophobia among Saudi parents accompanying pediatric patients attending dental clinic in college of dentistry, King Khalid University, Abha. The Questionnaire was given to Saudi parents accompanying pediatric patients attending dental clinics and data was collected from them. The data were entered and analyzed using the Statistical Package for the Social Sciences (SPSS 20). A P-value of less than 0.05 was considered to be statistically significant. Results: The majority of participants, 189(63%) were, said that they have experience of dental fear and anxiety in their lifetime period. 255(85%) agreed that they have come across one of their relatives or friends having the fear of dental treatment. Parents experienced various reasons for the cause of their dental fear, one of the major factors for dental fear they told was having the dentist remove their tooth (26%). Parents 155 (52%) stated that they visited dental clinic for treatment very often and 66(22%) visited rarely. Conclusions: Recognizing the level of fear that prevents patients from seeking dental care and understanding the occurrence of dental anxiety hold crucial importance in dental practice. While only a small percentage of subjects reported dental fear or would consider refusing dental consultations, assessing dental fear provides valuable insights for dental practitioners. However, there is a call for further research and efforts to enhance the comprehension of dental anxiety and behaviors during dental visits. [ABSTRACT FROM AUTHOR]

Published
2023

33. Ethical and Public Health Considerations for Integrating Physicians with Mental Disability into the Physician Workforce

Author

Amalia R. Sweet, Omar Sultan Haque, and Michael Ashley Stein

Subjects
Issues, ethics and legal aspects, Health Policy, General Medicine
Abstract

Stigma against mental disability within the medical field continues to impose significant barriers on physicians and trainees. Here, we examine several implications of this stigma and propose steps toward greater inclusion of persons with mental disabilities in the physician workforce.

Published
2022
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44. Physician, Heal Thy Double Stigma — Doctors with Mental Illness and Structural Barriers to Disclosure

Author

Omar Sultan Haque, Amelia Marvit, and Michael Ashley Stein

Subjects
medicine.medical_specialty, Social stigma, Social Stigma, education, Stigma (botany), Disclosure, 030204 cardiovascular system & hematology, 03 medical and health sciences, 0302 clinical medicine, Physicians, Humans, Medicine, Disabled Persons, Confidentiality, 030212 general & internal medicine, Structural barriers, Schools, Medical, Licensure, business.industry, Mental Disorders, Medical school, General Medicine, Licensure, Medical, Mental illness, medicine.disease, United States, Family medicine, business
Abstract

Physician, Heal Thy Double Stigma Throughout the medical school admissions process, training, and licensure activities, students and physicians with histories of mental illness face structural barr...

Published
2021
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