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Functional MRI and MR Spectroscopy Utilization in Jeddah Hospitals

Open Journal of Medical Imaging 2015年第3期5卷 165-173页

作者： Lamis K. Jada Nabeel Mishah khalid gh. alsafi Sarah Hagi Mawya A. Khafaji Hanan Y. Abbas Saddig D. Jastaniah Department of Diagnostic Radiology Faculty of Applied Medical Sciences King Abdulaziz University Jeddah KSA Radiology Department King Abdulaziz University Hospital Jeddah KSA Department of Radiology School of Medicine King Abdulaziz University Jeddah KSA

Functional magnetic resonance imaging “fMRI” and magnetic resonance spectroscopy “MRS” are two crucial milestones that were introduced apart from one another into brain imaging and their implementation in major local cities is eventual step. Thus, the purpose of this study was to compare those techniques in terms of their clinical utilization in patient care delivery among the major governmental and private hospitals within Jeddah city. The study initially included eigh.een hospitals to identify whether they were utilizing fMRI and MRS in their clinical practice. Out of the 18 hospitals under study only one hospital (5.6%) had both fMRI and MRS software;7 (38.9%) had MRS but not fMRI;4 (22.2%) did not have fMRI or MRS;and 6 (33.3%) hospitals had no MRI machine at all. Out of the eigh. hospitals applying MRS with one being excluded, the starting date of application was 2002 in 4 (57.1%) hospitals, 2004 in 1 (14.3%) hospital, and 2006 in 2 (28.6%) hospitals. The frequency of doing MRS was once a week in 2 (28.6%) hospitals, 2-3 cases/week in 3 (42.9%) hospitals, 5-10 cases/week in 1 (14.3%) hospital, and once every 6 months in 1 (14.3%) hospital. On the other hand, fMRI was applied only by one hospital starting in 2000 and was soon dismissed due to its time consumption and the inability of patients to accurately follow given instructions. It was concluded that MRS was more widely utilized compared to fMRI. Later on, a follow-up survey in the year of 2014 demonstrated that MRS has started to become a standard service in most hospitals whereas fMRI was still being unrecognized.

关键词： Brain fMRI Activation MRS Metabolites

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CT Optimization for Diagnosis of Some Acute Abdomen Cases

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Advances in Computed Tomography 2015年第2期4卷 19-26页

作者： Saddig D. Jastaniah Alamin M. Salih khalid gh. alsafi Hamad Elniel H. Eltyib Sarah Hagi Maway A. Khafaji Hanan Y. Abbas Mohammad Alshihri Department of Diagnostic Radiology Faculty of Applied Medical Sciences King Abdulaziz University Jeddah Kingdom of Saudi Arabia Radiology Department King Abdulaziz University Hospital Jeddah Kingdom of Saudi Arabia Department of Radiology School of Medicine King Abdulaziz University Jeddah Kingdom of Saudi Arabia

The acute abdomen is one of the most frequent causes for presentation to the emergency department. Imaging plays an important role for an accurate diagnosis, which in turn diminishes morbidity and mortality. The aim of this study was to demonstrate optimum CT aspects and emphasize on the important features of CT for those patients presenting with an acute abdominal pain at the Emergency Department both in general and in a number of selected conditions (appendicitis, small-bowel obstruction, acute pancreatitis, and diverticulitis). The reported data by this study are based on the author working experience, which forms a continuous protocol adjustment process. The present study provides evidence that CT would result in definite diagnosis of patients with abdominal pain in terms of the detection of some urgent conditions.

关键词： CT Acute Abdominal Pain Appendicitis Small-Bowel Obstruction

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机器人标定系统稳定性研究

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工业控制计算机 2017年第3期30卷 80-81,84页

作者：苏成志种垒王承运 Huzaifa khalid 刘响长春理工大学机电工程学院吉林长春130022

机器人标定是影响离线编程精度的关键因素之一。与传统的工业机器人标定方法相比,基于双PSD的标定方法能为准确地标定工业机器人关节零位偏差提供一种更有效的方法。在机器人基坐标系和PSD坐标系的空间关系未知时,双PSD标定系统稳定性... 详细信息

机器人标定是影响离线编程精度的关键因素之一。与传统的工业机器人标定方法相比,基于双PSD的标定方法能为准确地标定工业机器人关节零位偏差提供一种更有效的方法。在机器人基坐标系和PSD坐标系的空间关系未知时,双PSD标定系统稳定性要求严格的数学证明。通过设计一个基于Lyapunov函数的自适应算法,可以在线估计出机器人基坐标系和PSD坐标系之间关系;并证明了激光光斑能够稳定到双PSD平面上的理想位置,理论最终被仿真实验所验证。

关键词：机器人标定双PSD 关节零位偏差自适应算法

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