[Optimization of Scan Parameters for Patient without Breath Hold in Chest by Computed Tomography]
| Autor: | Hiroshi Takaku, Takuya Adachi, Masakatsu Takahashi, Hisashi Kayama, Yuya Shirakawa, Takeshi Sakamoto, Hiromi Ichikawa |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Time Factors
medicine.diagnostic_test Computer science business.industry Phantoms Imaging Detector Computed tomography General Medicine Thorax Standard deviation Imaging phantom Breath Holding Noise Motion medicine Operating time Humans Sensitivity (control systems) Nuclear medicine business Artifacts Tomography X-Ray Computed Rotation (mathematics) |
| Zdroj: | Nihon Hoshasen Gijutsu Gakkai zasshi. 74(2) |
| ISSN: | 0369-4305 |
| Popis: | This study aims to establish optimal scan parameters by high temporal resolution computed tomography (CT) scan for emergency patients who cannot hold their breath. First, we investigated scan parameters that can reduce the effect of motion by evaluating motion artifacts from the moving phantom scan and the temporal sensitivity profile (TPS) measurement. Second, we confirmed the standard deviation (SD) of the CT values as well as the operating time and exposure dose. As the results, plan C [rotation time: 0.275 s, detector rows: 80, pitch factor (PF): 1.100] and plan E (rotation time: 0.275 s, detector rows: 100, PF: 0.880) demonstrated high temporal resolution. The difference between the two is PF. The noise of plan C increased because PF is higher than plan E. This is also evident from the results of SD measurement. Our study demonstrates that the optimal parameters for patients who cannot hold their breath in the emergency care are plan C and plan E. In conclusion, we clarified necessary optimal scan parameters to provide clinical image that has more diagnostic information by reducing the effect of breath motion for emergency patients. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|