or specialists) qualified to perform the validations described. Parameter Actor Specification DICOM Tag Shall prepare a protocol to meet the specifications in Acquisition Radiologist and this table. Protocol Technologist Shall ensure technologists have been trained on the requirements of this profile. Shall set IEC Pitch to less than or equal to 2.0 for Spiral Pitch Radiologist and IEC Pitch single source scanners, or the equivalent for dual Factor Technologist source scanners. (0018,9311) Nominal Single Shall set the nominal tomographic section thickness Tomographic Radiologist and Collimation to achieve reconstructed slice thickness less than or Section Technologist Width equal to 1.25mm. Thickness (T) (0018,9306) Shall prepare a protocol to meet the specifications in Reconstruction Radiologist and this table. Protocol Technologist Shall ensure technologists have been trained on the requirements of this profile. Reconstructed Slice Radiologist and Image Shall set to less than or equal 1.25mm. Thickness Technologist Thickness (0018,0050) Spacing Shall set the reconstructed image interval to less than Reconstructed Radiologist and Between or equal to the Reconstructed Image Thickness (i.e. Image Interval Technologist Slices no gap, may have overlap). (0018,0088) Shall validate that the protocol achieves: A 3D PSF sigma ellipsoid volume of less than Radiologist, or equal to 1.5mm3, and Resolution Technologist, and A Z PSF sigma less than two times larger than Physicist the in-plane PSF sigma. See section 4.1. Assessment Procedure: Image Quality Radiologist, Shall validate that the protocol does not result in Edge Technologist, and edge enhancement exceeding 5%. Enhancement Physicist See section 4.1. Assessment Procedure: Image Quality Shall validate that the protocol results in CT HU value Radiologist, deviation of less than 35 HU for Air and Acrylic HU Deviation Technologist, and materials. Physicist See section 4.1. Assessment Procedure: Image Quality Shall validate that the protocol achieves Radiologist, a standard deviation that is <= 50 HU for Voxel Noise Technologist, and homogeneous Air and Acrylic materials. Physicist See section 4.1. Assessment Procedure: Image Quality Spatial Radiologist, Shall validate that 3D image acquisition results in
or specialists) qualified to perform the validations described. Parameter Actor Specification DICOM Tag Acquisition Protocol Radiologist and Technologist Shall prepare a protocol to meet the specifications in this table. Shall ensure technologists have been trained on the requirements of this profile. IEC Pitch Radiologist and Technologist Shall set IEC Pitch to less than or equal to 2.0 for single source scanners, or the equivalent for dual source scanners. Spiral Pitch Factor (0018,9311) Nominal Tomographic Section Thickness (T) Radiologist and Technologist Shall set the nominal tomographic section thickness to achieve reconstructed slice thickness less than or equal to 1.25mm. Single Collimation Width (0018,9306) Reconstruction Protocol Radiologist and Technologist Shall prepare a protocol to meet the specifications in this table. Shall ensure technologists have been trained on the requirements of this profile. Reconstructed Image Thickness Radiologist and Technologist Shall set to less than or equal 1.25mm. Slice Thickness (0018,0050) Reconstructed Image Interval Radiologist and Technologist Shall set the reconstructed image interval to less than or equal to the Reconstructed Image Thickness (i.e. no gap, may have overlap). Spacing Between Slices (0018,0088) Resolution Radiologist, Technologist, and Physicist Shall validate that the protocol achieves: A 3D PSF sigma ellipsoid volume of less than or equal to 1.5mm3, and A Z PSF sigma less than two times larger than the in-plane PSF sigma. See section 4.1. Assessment Procedure: Image Quality Edge Enhancement Radiologist, Technologist, and Physicist Shall validate that the protocol does not result in edge enhancement exceeding 5%. See section 4.1. Assessment Procedure: Image Quality HU Deviation Radiologist, Technologist, and Physicist Shall validate that the protocol results in CT HU value deviation of less than 35 HU for Air and Acrylic materials. See section 4.1. Assessment Procedure: Image Quality Voxel Noise Radiologist, Technologist, and Physicist Shall validate that the protocol achieves a standard deviation that is <= 50 HU for homogeneous Air and Acrylic materials. See section 4.1. Assessment Procedure: Image Quality Spatial Radiologist, Shall validate that 3D image acquisition results in
QIBA_CT_Vol_SmallLungNoduleAssessmentInCTScreening_2018.02.11.docx