Chest CT scans were performed using a single inspiratory phase in two commercial multi-detector CT scanners (Philips Ingenuity Core 128, Philips Medical Systems, Best, the Netherlands; SOMATOM Definition AS, Siemens Healthineers, Germany). To minimize motion artifacts, patients were instructed on breath-holding; CT images were then acquired during a single breath-hold. For CT acquisition, the tube voltage was 120kVp with automatic tube current modulation. From the raw data, CT images were reconstructed with a matrix size of 512 ×512 as axial images (thickness of 1.5mm and increment of 1.5mm) in transverse slice orientation with either hybrid iterative reconstruction (iDose level 5, Philips Medical Systems, Netherlands) or a pulmonary B70F kernel and a mediastinal B30f kernel (Siemens Healthineers, Germany). The mean CTDIvol was 8.4 ±2.0 mGy (range: 5.2-12.6 mGy).
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Chest CT Imaging Protocol for Research
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Corresponding Organization :
Other organizations : State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing, Union Hospital, Huazhong University of Science and Technology, Philips (China), University College Hospital, University College London
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Variable analysis
independent variables
- CT scanner type (Philips Ingenuity Core 128, Siemens SOMATOM Definition AS)
- Chest CT scan images
- Tube voltage (120kVp)
- Automatic tube current modulation
- Reconstruction matrix size (512 x 512)
- Slice thickness (1.5mm)
- Slice increment (1.5mm)
- Reconstruction kernel (hybrid iterative reconstruction, pulmonary B70F, mediastinal B30f)
- Mean CTDIvol (8.4 ±2.0 mGy, range: 5.2-12.6 mGy)
- Breath-holding instructions to minimize motion artifacts
- None explicitly mentioned
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