Application of aluminum and arylic phantom to characterize the mass X-ray attenuation proper in dual energy absorptiometry (DEXA)INSTRUMENTS
| Autor: | Ming-Shiung Huang, 黃敏雄 |
|---|---|
| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 The purpose of this research is to investigate the capability of detecting slight bone mineral density value changes of those dual-emission X-ray absorptiometries used in clinical. This experiment is designed based on the combination of clinical experiences and academic research method to demonstrate the sensitivity of those dual-emission X-ray absorptiometries widely used in clinical. In this research, a standard phantom is produced based on the different X-ray attenuation factors of Aluminum and acrylics and a standard scan pattern is also established. The values generated from the phantom scanned by clinical used absorptiometries under standard scan pattern are analyzed and compared. The experiment is comprised of standard phantom production, the investigation of quality assurance and quality control results of each absorptiometry, comparison of detected radiation dose, data analysis and recognition of realistic and arithmetic values. According to the data from this research, the factors, which might affect the capability of absorptiometry of detecting slight bone mineral density value changes, such as, scan model, thickness of body and the patient information changes are discussed. The result of this experiment will be used as the reference of absorptiometry quality investigation. Key word: Dual-emission X-ray absorptiometry, Accuracy, Precision, realistic value, arithmetic value. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|