Fast kilovoltage-switching dual-energy CT offering lower x-ray dose than single-energy CT for the chest: a quantitative and qualitative comparison study of the two methods of acquisition
| Autor: | Basar Sarikaya, Osman Melih Topcuoglu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Adult
Male Lung Neoplasms Image quality media_common.quotation_subject Interobserver reproducibility Signal-To-Noise Ratio Radiation Dosage 030218 nuclear medicine & medical imaging Objective assessment Radiography Dual-Energy Scanned Projection 03 medical and health sciences 0302 clinical medicine Chest Imaging Medicine Contrast (vision) Humans Radiology Nuclear Medicine and imaging Prospective Studies media_common Aged X ray dose business.industry Significant difference Reproducibility of Results Middle Aged Thorax Image Enhancement Comparison study Female Dual energy ct Cardiology and Cardiovascular Medicine business Nuclear medicine Tomography X-Ray Computed |
| Popis: | PURPOSE: We aimed to compare the size-specific dose estimates (SSDE), computed tomography (CT) dose indices and image quality parameters of the chest CTs obtained with fast kilovoltage-switching (FKS) dual-energy (DE) CT versus those with single-energy (SE) CT. METHODS: Patients who had chest SECT within the last 6 months were prospectively scanned with chest FKS-DECT. Quantitative comparison was made by calculating the mean SSDE, CTDI(vol), contrast, noise, contrast-to-noise ratio (CNR), and signal-to-noise ratio (SNR) for both acquisitions. Two radiologists evaluated the chest SECT and DECT images qualitatively blinded to the technique used. The paired Student’s t test was utilized for comparing the quantitative and qualitative data. Inter- and intraobserver agreement were also assessed. RESULTS: A total of 42 patients were included. The mean SSDE, CTDI(vol), contrast, noise, CNR, and SNR for SECT versus DECT were 12.7±2.2 mGy vs. 9.3±1.2 mGy (P = 0.001), 10.9±2.4 mGy vs. 8±1.2 mGy (P < 0.001), 211.9±44.7 vs. 216.3±59 (P = 0.350), 12.9±2.4 vs. 13.9±3.7 (P = 0.086), 13.5±5.2 vs. 13.3±8.4 (P = 0.548) and 12±3.5 vs. 11.5±3.4 (P = 0.774), respectively. Interobserver reproducibility was high for contrast, noise, CNR, and SNR (ICC = 0.89, 0.85, 0.93, and 0.82, respectively; all P < 0.05). Intraobserver reproducibility was high for contrast, noise, CNR, and SNR (ICC = 0.80, 0.77, 0.85, and 0.88, respectively; all P < 0.05). CONCLUSION: The mean SSDE of the chest CTs obtained with FKS-DECT were 26.8% lower than those with SECT with significant difference for the objective assessment and there was no significant difference for the subjective assessment of the image qualities, in this series. |
| Databáze: | OpenAIRE |
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