Reducing Image Noise in Computed Tomography (CT) Colonography
| Autor: | Cynthia H. McCollough, Thomas J. Vrieze, Xinhui Duan, Gregory J. Michalak, Yu Liu, Mingliang Qu, Maria M. Shiung, Joel G. Fletcher, Shuai Leng |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Male
medicine.medical_specialty Scanner Noise reduction Transducers Colonic Polyps Computed tomography Integrated circuit Signal-To-Noise Ratio Sensitivity and Specificity law.invention law Computed Tomography Colonography Image Interpretation Computer-Assisted Image noise medicine Humans Radiology Nuclear Medicine and imaging Medical physics Aged medicine.diagnostic_test business.industry Detector Reproducibility of Results Equipment Design Image Enhancement Equipment Failure Analysis Noise Semiconductors Female Artifacts Colorectal Neoplasms Nuclear medicine business Colonography Computed Tomographic |
| Zdroj: | Journal of Computer Assisted Tomography. 38:398-403 |
| ISSN: | 0363-8715 |
| Popis: | To investigate whether the integrated circuit (IC) detector results in reduced noise in computed tomography (CT) colonography (CTC).Three hundred sixty-six consecutive patients underwent clinically indicated CTC using the same CT scanner system, except for a difference in CT detectors (IC or conventional). Image noise, patient size, and scanner radiation output (volume CT dose index) were quantitatively compared between patient cohorts using each detector system, with separate comparisons for the abdomen and pelvis.For the abdomen and pelvis, despite significantly larger patient sizes in the IC detector cohort (both P0.001), image noise was significantly lower (both P0.001), whereas volume CT dose index was unchanged (both P0.18). Based on the observed image noise reduction, radiation dose could alternatively be reduced by approximately 20% to result in similar levels of image noise.Computed tomography colonography images acquired using the IC detector had significantly lower noise than images acquired using the conventional detector. This noise reduction can permit further radiation dose reduction in CTC. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|