Impact of active dose management on radiation exposure and image quality in computed tomography: An observational study in 1315 patients
| Autor: | Frank Wacker, Filip Klimeš, Erik F. Hauck, Hans-Jürgen Raatschen, Lena Sonnow, Babak Alikhani, Kristina Ringe, Gesa Helen Poehler |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Male
Radiography Abdominal Image quality Computed tomography Signal-To-Noise Ratio Radiation Dosage 030218 nuclear medicine & medical imaging Pelvis 03 medical and health sciences 0302 clinical medicine medicine Humans Radiology Nuclear Medicine and imaging Aged Retrospective Studies medicine.diagnostic_test business.industry Reproducibility of Results General Medicine Middle Aged Radiation Exposure Radiation exposure Cross-Sectional Studies 030220 oncology & carcinogenesis Radiological weapon Reference values Observational study Female Radiography Thoracic Tomography Radiation protection Nuclear medicine business Tomography X-Ray Computed |
| Zdroj: | European journal of radiology. 125 |
| ISSN: | 1872-7727 |
| Popis: | Purpose To determine the clinical impact of CT dose management team on radiation exposure and image quality. Methods 2026 clinical routine CT examinations of 1315 patients were evaluated retrospectively. A CT dose management team was established as an integral part of the radiological department. It identified 5 CT protocols (A–E), where national reference values were exceeded the most. Those reference values included specifically the mean volumetric CT dose index (CTDIvol) and the mean dose-length product (DLP). Baseline data (period 1) and follow up data (period 2) were obtained after reduction of tube voltage and increase of pitch or noise index. Signal-to-noise ratios (SNR) and contrast-to-noise ratios (CNR) were calculated to compare image quality. Two-sided t-tests were performed. Results Mean CTDIvol and mean DLP of the chest protocol (A) decreased after reduction of tube voltage (P 0.05). SNR (protocol A) was significantly higher in period 2 (P Conclusions Establishing an operating dose management team as a standard for good clinical practice helps to considerably reduce CT radiation dose while preserving image quality. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect