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| 1 | Feasibility and accuracy of coronary imaging in elderly patients using the 64-row multi-detector computed tomography: a correlation study with conventional coronary angiography显示文摘Background Elderly patients generally have higher occurrence of coronary calcification, increased heart rate and difficulty with prolonged breath-holding. The aim of our study was to investigate the feasibility and accuracy of using 64-row multi-detector computed tomography (MDCT) in the assessment of coronary artery stenoses in elderly patients. Methods One hundred and fifty two patients with suspected or known coronary artery disease were divided into 4 groups according to their age (Group A: 40-49 years,n=34; Group B: 50-59 years, n=57; Group C: 60-69 years, n=48; Group D: 70 years and above; n=13). Coronary CT angiography (CTA) using a 64-row MDCT was performed and the findings were compared with that of conventional coronary angiography (CCA).Using axial images, multi-planar reconstructions (MPR) and maximum intensity projections (MIP), coronary segments of lumen diameter = 1.5mm were analyzed for the presence of significant stenosis (= 50% ). Results Percentages of poor image quality from coronary CTA preventing reliable correlations with CCA were 21%, 14%, 19% and 62% in Groups A to D respectively. Patients in Group D had significantly higher calcium scores compared with the other groups (P<0.001). In patients where CTA images were of acceptable quality, percentages of accurate correlations with CCA were 89.8%, 93.4%, 86.6% and 78.0% for Groups A to D respectively.There were no significant difference in serum creatinine, heart rate and contrast volume between the 4 groups. Conclusions The 64-row MDCT coronary angiography was less accurate and feasible for patients aged 70 years or above due to heavy coronary calcification and inability to perform a satisfactory breath-hold. However, a high diagnostic accuracy with the MDCT is possible in patients aged less than 70 years. | Chee Khoon LIEW Sze Piaw CHIN Tiong Kiam ONG Seyfarth Tobias Yean Yip FONG Choon Kiat ANG Houng Bang LIEW Rapaee ANNUAR Kui Hian SIM | 2006 | Journal of Geriatric Cardiology2006，3，1： | 4 |
| 2 | A collaborative multiagent taxi dispatch system显示文摘 | KIAM T S NAM H D DER-HORNG L | 2010 | IEEE Transactions on Automation Science and Engineering2010，7，3： | 1 |
| 3 | PID control system analysis, design, and technology显示文摘 | Kiam Heong Ang Chong G and Yun Li | 2005 | IEEE Transactions on Control Systems Technology2005，13，4： | 1 |
| 4 | PID control system analysis, design and technology显示文摘 | Kiam H A Chong G Yun L | 2005 | IEEE Transactions on Control Systems Technology2005，13，4： | 1 |
| 5 | PID control sys- tem analysis, design, and technology 显示文摘 | KIAM Heong-ang CHONG G YUN Li | 2005 | IEEE Transac- tions on Control Systems Technology2005，13，4： | 1 |
| 6 | PID con- trol system analysis and design 显示文摘 | Li Yun Kiam Heong Ang Chong G C Y | 2006 | IEEE Control Systems Magazine2006，26，1： | 1 |
| 7 | Coalition for- mation for resource coallocation using BEI assignment agents 显示文摘 | Kiam T S Kwang M S Shane Y C K | 2007 | IEEE transactions on systems man and cybernetics-part C: applications and reviews2007，37，4： | 1 |
| 8 | Patents, soft- ware and hardware for PID control:An overview and analysis of the current art 显示文摘 | YUN L KIAM H A GREGORY C Y C | 2006 | IEEE Control Systems Magazine2006，26，1： | 1 |
| 9 | PID control system analysis, Design, and Technology 显示文摘 | Kiam Heong Ang Gregory Chong YunLi | 2005 | IEEE Transactions on control systems Technology2005，4，13： | 1 |
| 10 | Patents,software and hardware for PID Control显示文摘 | LI Y KIAM H A GREGORY C Y | 2006 | IEEE Control Systems Magazine2006，26，1： | 1 |
| 11 | PID control system analysis and design 显示文摘 | Yun Li Kiam Heong Ang Gregory C Y Chong | 2006 | IEEE Control System Magazine2006，，2： | 1 |
| 12 | PID control system analysis and design 显示文摘 | LI Yun KIAM H A GREGORY C C | 2006 | IEEE Control Systems Magazine2006，，2： | 1 |
| 13 | PID Control System Analysis,Design,And Technology显示文摘 | Kiam Heeng Ang Chong G Yun Li | 2005 | IEEE Transactions on Conrool Systems Technology2005，13，4： | 1 |
| 14 | PID control system analysis and design 显示文摘 | Li Yun Kiam Heong Ang Chong G C Y | 2006 | Control System IEEE2006，26，1： | 1 |
| 15 | PID Control System Analysis, Design, and Technology 显示文摘 | Kiam H A Gregory C Li Y | 2005 | IEEE Transactions on control systems technology2005，13，4： | 1 |
| 16 | Patents, software and hardware for PID control-an overview and analysis of the current art显示文摘 | Yun L Kiam H A Gregory C Y C | 2006 | IEEE Control Systems Magazine2006，26，1： | 1 |
| 17 | PID control system analysis and design 显示文摘 | LI Yun KIAM H A CHONG G C Y | 2006 | IEEE Control Systems2006，26，1： | 1 |
| 18 | PID Control System Analysis and Design 显示文摘 | YUN Li KIAM Heong Ang CHONG G C Y | 2006 | Control System Magazine IEEE(S0272-1708)2006，26，： | 1 |
| 19 | PID control system analysis,design,and technology显示文摘 | Kiam H A Chong G Yun L | | 0，，04： | 1 |
| 20 | PID control system analysis, design and technology显示文摘 | Kiam Heongang Gregory Chong Li Yun | 2005 | IEEE Transac- tions on Control Systems Technology2005，13，4： | 1 |
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