Publications by Sarah Qahtan
Background: Non-alcoholic fatty liver disease (NAFLD) is a very common liver disease in the world... more Background: Non-alcoholic fatty liver disease (NAFLD) is a very common liver disease in the world, particularly in Western and developed countries. It is rapidly growing in the Asia-Pacific region. Objectives: This study was designed to determine the association between risk factors and non-alcoholic fatty liver disease grades among Malaysian adults. Patients and Methods: A cross-sectional observational study design was prospectively carried out in this study. Consecutive 628 respondents who attended for a medical checkup at urban health center had been recruited for the study. All respondents had physical examination, blood tests, clinical assessments and abdominal ultrasound. A structured self-administered questionnaire has been also used in this study in this survey. Results: From total of 628 " health screened " subjects, 235 subjects (37.4%) were diagnosed to have non-alcoholic fatty liver disease. Female gender and Chinese race were predominant in our study population. Of those with NAFLD, more than half subjects (63.4) had a moderate grade of non-alcoholic fatty liver disease. The mean age of the study population was 54.54 ±6.69 years. Differences of mean body mass index (BMI) and waist to hip ratio (WHR) were found to be significant among non-alcoholic fatty liver disease grades (P< 0.001). Similarly, mean triglycerides (TG) and high-densiy lipoprotein-cholesterol (HDL-C) levels had significant differences among non-alcoholic fatty liver disease grades (P< 0.001 and P= 0.016, respectively). Conclusion: non-alcoholic fatty liver disease is common among urban Malaysian adult population. Anthropometric measurements were a closely correlated with non-alcoholic fatty liver disease grades.
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3D data visualization and 3D display have received extensive attention from researchers due to th... more 3D data visualization and 3D display have received extensive attention from researchers due to the rapid growth in computer graphics in the human’s daily life. Despite the massive studies efforts consumed for 3D visualization, the shape perception of a 3D model has not yet been satisfied. In this study, we enhanced the visualization of 3D data for a hologram pyramid display by proposing a procedure named the hololighting style which consists of two steps. The first step is enhancing the shape perception of the 3D data. We proposed a new lighting system to emphasize the shape feature by employing non-photorealistic rendering as an alternative to the traditional lighting. The second step in the procedure is 3D hologram rendering for the hologram pyramid display. The screen is split in this step into nine segments for creating four viewports to contain 3D object from four views which are front, back, left and right. These steps are created and implemented using Visual C++, OpenGL 4.5. The results showed the enhancement of the 3D data as a hologram floating inside a transparent pyramid. The quality of the hologram is reported to be preferred when compared to a traditional 2D display. Moreover, the shape of the 3D data was reported to be enhanced by the new lighting style when compared to traditional lighting.
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Publications by Sarah Qahtan