Journal: Quantitative Imaging in Medicine and Surgery

Article Title: Comparison of virtual monoenergetic imaging between a rapid kilovoltage switching dual-energy computed tomography with deep-learning and four dual-energy CTs with iterative reconstruction

doi: 10.21037/qims-21-708

Figure Lengend Snippet: Acquisition and reconstruction parameters used for each dual-energy CT platform with a dose level of 10 mGy

Article Snippet: However, this dose level can be considered as routinely low in radiologic fields. table ft1 table-wrap mode="anchored" t5 caption a7 Dual-energy CT (DECT) platform Rapid kVp switching (KVSCT-Canon) Fast kVp switching (KVSCT-GE) Split filter (SFCT) Dual-source (DSCT) Dual-layer detector (DLCT) Manufacturer Canon Medical Systems GE Healthcare Siemens Healthineers Siemens Healthineers Philips Medical system CT scan model Aquilion Revolution Somatom Somatom IQon Spectral CT One PRISM GSI Edge Force Tube voltage (kVp) 80/135 80/140 AuSn120 80/Sn150 120 Pitch 0.813 1.375 0.3 0.6 1.234 Tube current (mAs) 140 191 (GSI 22) 468 278/139 111 Rotation time (s) 0.5 0.7 0.33 0.5 0.5 CTDI vol (mGy) 10.10 10.76 10.00 9.93 10.00 Beam collimation 80×0.5 mm 64×0.625 mm 64×0.6 mm 128×0.6 mm 64×0.625 mm Slice thickness/overlapped (mm) 0.5/0.5 mm; 1.5/1.5 mm* 1.25/1.25 mm 1.5/1.25 mm 1.5/1.25 mm 1.5/1.25 mm Reconstruction algorithm DLSR - Standard ASIR 50% ADMIRE 3 ADMIRE 3 iDose 4 4 Reconstruction kernel Body Spectral Standard Br38 Br40 B Workstation Vitrea Advantage Window Syngo.Via Syngo.Via IntelliSpace Viewing mode – Mono Monoenergetic+ Monoenergetic+ MonoE VMI range 40–135 keV 40–140 keV 40–190 keV 40–190 keV 40–200 keV Open in a separate window *, the slices with a thickness of 1.5/1.5 mm were generated after the reconstruction process using the Vitrea workstation.

Techniques: Computed Tomography

Journal: Quantitative Imaging in Medicine and Surgery

Article Title: Comparison of virtual monoenergetic imaging between a rapid kilovoltage switching dual-energy computed tomography with deep-learning and four dual-energy CTs with iterative reconstruction

doi: 10.21037/qims-21-708

Figure Lengend Snippet: Contrast values (variations of CT numbers) for the 3 inserts (soft tissue, blood-mimicking material plus iodine at 2.0 or 4.0 mg/mL), as function of keV for all platforms and both slice thicknesses for KVSCT-Canon. (A) Contrast between soft tissue and blood-mimicking material plus iodine at 2.0 mg/mL inserts; (B) contrast between soft tissue and blood-mimicking material plus iodine at 4.0 mg/mL inserts. KVSCT-Canon, rapid kV switching CT; DLCT, dual-layer CT; DSCT, dual-source CT; KVSCT-GE, fast kV switching CT; SFCT, split filter CT.

Article Snippet: However, this dose level can be considered as routinely low in radiologic fields. table ft1 table-wrap mode="anchored" t5 caption a7 Dual-energy CT (DECT) platform Rapid kVp switching (KVSCT-Canon) Fast kVp switching (KVSCT-GE) Split filter (SFCT) Dual-source (DSCT) Dual-layer detector (DLCT) Manufacturer Canon Medical Systems GE Healthcare Siemens Healthineers Siemens Healthineers Philips Medical system CT scan model Aquilion Revolution Somatom Somatom IQon Spectral CT One PRISM GSI Edge Force Tube voltage (kVp) 80/135 80/140 AuSn120 80/Sn150 120 Pitch 0.813 1.375 0.3 0.6 1.234 Tube current (mAs) 140 191 (GSI 22) 468 278/139 111 Rotation time (s) 0.5 0.7 0.33 0.5 0.5 CTDI vol (mGy) 10.10 10.76 10.00 9.93 10.00 Beam collimation 80×0.5 mm 64×0.625 mm 64×0.6 mm 128×0.6 mm 64×0.625 mm Slice thickness/overlapped (mm) 0.5/0.5 mm; 1.5/1.5 mm* 1.25/1.25 mm 1.5/1.25 mm 1.5/1.25 mm 1.5/1.25 mm Reconstruction algorithm DLSR - Standard ASIR 50% ADMIRE 3 ADMIRE 3 iDose 4 4 Reconstruction kernel Body Spectral Standard Br38 Br40 B Workstation Vitrea Advantage Window Syngo.Via Syngo.Via IntelliSpace Viewing mode – Mono Monoenergetic+ Monoenergetic+ MonoE VMI range 40–135 keV 40–140 keV 40–190 keV 40–190 keV 40–200 keV Open in a separate window *, the slices with a thickness of 1.5/1.5 mm were generated after the reconstruction process using the Vitrea workstation.

Techniques:

Journal: Quantitative Imaging in Medicine and Surgery

Article Title: Comparison of virtual monoenergetic imaging between a rapid kilovoltage switching dual-energy computed tomography with deep-learning and four dual-energy CTs with iterative reconstruction

doi: 10.21037/qims-21-708

Figure Lengend Snippet: Values of NPS as function of keV for all CT platforms and both slice thicknesses for KVSCT-Canon. (A) Noise magnitude; (B) average NPS spatial frequency (fav). NPS, noise power spectrum; KVSCT-Canon, rapid kV switching CT; DLCT, dual-layer CT; DSCT, dual-source CT; KVSCT-GE, fast kV switching CT; SFCT, split filter CT.

Article Snippet: However, this dose level can be considered as routinely low in radiologic fields. table ft1 table-wrap mode="anchored" t5 caption a7 Dual-energy CT (DECT) platform Rapid kVp switching (KVSCT-Canon) Fast kVp switching (KVSCT-GE) Split filter (SFCT) Dual-source (DSCT) Dual-layer detector (DLCT) Manufacturer Canon Medical Systems GE Healthcare Siemens Healthineers Siemens Healthineers Philips Medical system CT scan model Aquilion Revolution Somatom Somatom IQon Spectral CT One PRISM GSI Edge Force Tube voltage (kVp) 80/135 80/140 AuSn120 80/Sn150 120 Pitch 0.813 1.375 0.3 0.6 1.234 Tube current (mAs) 140 191 (GSI 22) 468 278/139 111 Rotation time (s) 0.5 0.7 0.33 0.5 0.5 CTDI vol (mGy) 10.10 10.76 10.00 9.93 10.00 Beam collimation 80×0.5 mm 64×0.625 mm 64×0.6 mm 128×0.6 mm 64×0.625 mm Slice thickness/overlapped (mm) 0.5/0.5 mm; 1.5/1.5 mm* 1.25/1.25 mm 1.5/1.25 mm 1.5/1.25 mm 1.5/1.25 mm Reconstruction algorithm DLSR - Standard ASIR 50% ADMIRE 3 ADMIRE 3 iDose 4 4 Reconstruction kernel Body Spectral Standard Br38 Br40 B Workstation Vitrea Advantage Window Syngo.Via Syngo.Via IntelliSpace Viewing mode – Mono Monoenergetic+ Monoenergetic+ MonoE VMI range 40–135 keV 40–140 keV 40–190 keV 40–190 keV 40–200 keV Open in a separate window *, the slices with a thickness of 1.5/1.5 mm were generated after the reconstruction process using the Vitrea workstation.

Techniques:

Journal: Quantitative Imaging in Medicine and Surgery

Article Title: Comparison of virtual monoenergetic imaging between a rapid kilovoltage switching dual-energy computed tomography with deep-learning and four dual-energy CTs with iterative reconstruction

doi: 10.21037/qims-21-708

Figure Lengend Snippet: Normalized NPS peak curves at different keVs for all platforms. Each NPS curve is normalized to its respective maximum NPS peak value. NPS, noise power spectrum; KVSCT-Canon, rapid kV switching CT; DLCT, dual-layer CT; DSCT, dual-source CT; KVSCT-GE, fast kV switching CT; SFCT, split filter CT.

Article Snippet: However, this dose level can be considered as routinely low in radiologic fields. table ft1 table-wrap mode="anchored" t5 caption a7 Dual-energy CT (DECT) platform Rapid kVp switching (KVSCT-Canon) Fast kVp switching (KVSCT-GE) Split filter (SFCT) Dual-source (DSCT) Dual-layer detector (DLCT) Manufacturer Canon Medical Systems GE Healthcare Siemens Healthineers Siemens Healthineers Philips Medical system CT scan model Aquilion Revolution Somatom Somatom IQon Spectral CT One PRISM GSI Edge Force Tube voltage (kVp) 80/135 80/140 AuSn120 80/Sn150 120 Pitch 0.813 1.375 0.3 0.6 1.234 Tube current (mAs) 140 191 (GSI 22) 468 278/139 111 Rotation time (s) 0.5 0.7 0.33 0.5 0.5 CTDI vol (mGy) 10.10 10.76 10.00 9.93 10.00 Beam collimation 80×0.5 mm 64×0.625 mm 64×0.6 mm 128×0.6 mm 64×0.625 mm Slice thickness/overlapped (mm) 0.5/0.5 mm; 1.5/1.5 mm* 1.25/1.25 mm 1.5/1.25 mm 1.5/1.25 mm 1.5/1.25 mm Reconstruction algorithm DLSR - Standard ASIR 50% ADMIRE 3 ADMIRE 3 iDose 4 4 Reconstruction kernel Body Spectral Standard Br38 Br40 B Workstation Vitrea Advantage Window Syngo.Via Syngo.Via IntelliSpace Viewing mode – Mono Monoenergetic+ Monoenergetic+ MonoE VMI range 40–135 keV 40–140 keV 40–190 keV 40–190 keV 40–200 keV Open in a separate window *, the slices with a thickness of 1.5/1.5 mm were generated after the reconstruction process using the Vitrea workstation.

Techniques:

Journal: Quantitative Imaging in Medicine and Surgery

Article Title: Comparison of virtual monoenergetic imaging between a rapid kilovoltage switching dual-energy computed tomography with deep-learning and four dual-energy CTs with iterative reconstruction

doi: 10.21037/qims-21-708

Figure Lengend Snippet: Values of task-based transfer function of the acrylic insert at 50% as function of keV for all platforms and both slice thicknesses for KVSCT-Canon. (A) Values of task-based transfer function at 50% (f50); (B) values of task-based transfer function at 10% (f10). KVSCT-Canon, rapid kV switching CT; DLCT, dual-layer CT; DSCT, dual-source CT; KVSCT-GE, fast kV switching CT; SFCT, split filter CT.

Article Snippet: However, this dose level can be considered as routinely low in radiologic fields. table ft1 table-wrap mode="anchored" t5 caption a7 Dual-energy CT (DECT) platform Rapid kVp switching (KVSCT-Canon) Fast kVp switching (KVSCT-GE) Split filter (SFCT) Dual-source (DSCT) Dual-layer detector (DLCT) Manufacturer Canon Medical Systems GE Healthcare Siemens Healthineers Siemens Healthineers Philips Medical system CT scan model Aquilion Revolution Somatom Somatom IQon Spectral CT One PRISM GSI Edge Force Tube voltage (kVp) 80/135 80/140 AuSn120 80/Sn150 120 Pitch 0.813 1.375 0.3 0.6 1.234 Tube current (mAs) 140 191 (GSI 22) 468 278/139 111 Rotation time (s) 0.5 0.7 0.33 0.5 0.5 CTDI vol (mGy) 10.10 10.76 10.00 9.93 10.00 Beam collimation 80×0.5 mm 64×0.625 mm 64×0.6 mm 128×0.6 mm 64×0.625 mm Slice thickness/overlapped (mm) 0.5/0.5 mm; 1.5/1.5 mm* 1.25/1.25 mm 1.5/1.25 mm 1.5/1.25 mm 1.5/1.25 mm Reconstruction algorithm DLSR - Standard ASIR 50% ADMIRE 3 ADMIRE 3 iDose 4 4 Reconstruction kernel Body Spectral Standard Br38 Br40 B Workstation Vitrea Advantage Window Syngo.Via Syngo.Via IntelliSpace Viewing mode – Mono Monoenergetic+ Monoenergetic+ MonoE VMI range 40–135 keV 40–140 keV 40–190 keV 40–190 keV 40–200 keV Open in a separate window *, the slices with a thickness of 1.5/1.5 mm were generated after the reconstruction process using the Vitrea workstation.

Techniques:

Journal: Quantitative Imaging in Medicine and Surgery

Article Title: Comparison of virtual monoenergetic imaging between a rapid kilovoltage switching dual-energy computed tomography with deep-learning and four dual-energy CTs with iterative reconstruction

doi: 10.21037/qims-21-708

Figure Lengend Snippet: Detectability index (d’) for the detection tasks of two contrast-enhanced lesions as function of keV for all CT platforms and both slice thicknesses for KVSCT-Canon. Simulated lesions with characteristics of contrast corresponding to the soft tissue and blood mimicking iodine at 2 mg/mL (A) and at 4 mg/mL (B) are presented. KVSCT-Canon, rapid kV switching CT; DLCT, dual-layer CT; DSCT, dual-source CT; KVSCT-GE, fast kV switching CT; SFCT, split filter CT.

Article Snippet: However, this dose level can be considered as routinely low in radiologic fields. table ft1 table-wrap mode="anchored" t5 caption a7 Dual-energy CT (DECT) platform Rapid kVp switching (KVSCT-Canon) Fast kVp switching (KVSCT-GE) Split filter (SFCT) Dual-source (DSCT) Dual-layer detector (DLCT) Manufacturer Canon Medical Systems GE Healthcare Siemens Healthineers Siemens Healthineers Philips Medical system CT scan model Aquilion Revolution Somatom Somatom IQon Spectral CT One PRISM GSI Edge Force Tube voltage (kVp) 80/135 80/140 AuSn120 80/Sn150 120 Pitch 0.813 1.375 0.3 0.6 1.234 Tube current (mAs) 140 191 (GSI 22) 468 278/139 111 Rotation time (s) 0.5 0.7 0.33 0.5 0.5 CTDI vol (mGy) 10.10 10.76 10.00 9.93 10.00 Beam collimation 80×0.5 mm 64×0.625 mm 64×0.6 mm 128×0.6 mm 64×0.625 mm Slice thickness/overlapped (mm) 0.5/0.5 mm; 1.5/1.5 mm* 1.25/1.25 mm 1.5/1.25 mm 1.5/1.25 mm 1.5/1.25 mm Reconstruction algorithm DLSR - Standard ASIR 50% ADMIRE 3 ADMIRE 3 iDose 4 4 Reconstruction kernel Body Spectral Standard Br38 Br40 B Workstation Vitrea Advantage Window Syngo.Via Syngo.Via IntelliSpace Viewing mode – Mono Monoenergetic+ Monoenergetic+ MonoE VMI range 40–135 keV 40–140 keV 40–190 keV 40–190 keV 40–200 keV Open in a separate window *, the slices with a thickness of 1.5/1.5 mm were generated after the reconstruction process using the Vitrea workstation.

Techniques:

Journal: Quantitative Imaging in Medicine and Surgery

Article Title: Comparison of virtual monoenergetic imaging between a rapid kilovoltage switching dual-energy computed tomography with deep-learning and four dual-energy CTs with iterative reconstruction

doi: 10.21037/qims-21-708

Figure Lengend Snippet: Acquisition and reconstruction parameters used for each dual-energy CT platform with a dose level of 10 mGy

Article Snippet: However, this dose level can be considered as routinely low in radiologic fields. table ft1 table-wrap mode="anchored" t5 caption a7 Dual-energy CT (DECT) platform Rapid kVp switching (KVSCT-Canon) Fast kVp switching (KVSCT-GE) Split filter (SFCT) Dual-source (DSCT) Dual-layer detector (DLCT) Manufacturer Canon Medical Systems GE Healthcare Siemens Healthineers Siemens Healthineers Philips Medical system CT scan model Aquilion Revolution Somatom Somatom IQon Spectral CT One PRISM GSI Edge Force Tube voltage (kVp) 80/135 80/140 AuSn120 80/Sn150 120 Pitch 0.813 1.375 0.3 0.6 1.234 Tube current (mAs) 140 191 (GSI 22) 468 278/139 111 Rotation time (s) 0.5 0.7 0.33 0.5 0.5 CTDI vol (mGy) 10.10 10.76 10.00 9.93 10.00 Beam collimation 80×0.5 mm 64×0.625 mm 64×0.6 mm 128×0.6 mm 64×0.625 mm Slice thickness/overlapped (mm) 0.5/0.5 mm; 1.5/1.5 mm* 1.25/1.25 mm 1.5/1.25 mm 1.5/1.25 mm 1.5/1.25 mm Reconstruction algorithm DLSR - Standard ASIR 50% ADMIRE 3 ADMIRE 3 iDose 4 4 Reconstruction kernel Body Spectral Standard Br38 Br40 B Workstation Vitrea Advantage Window Syngo.Via Syngo.Via IntelliSpace Viewing mode – Mono Monoenergetic+ Monoenergetic+ MonoE VMI range 40–135 keV 40–140 keV 40–190 keV 40–190 keV 40–200 keV Open in a separate window *, the slices with a thickness of 1.5/1.5 mm were generated after the reconstruction process using the Vitrea workstation.

Techniques: Computed Tomography