The value of metal artifact reduction and iterative algorithms in dual energy CT angiography in patients after complex endovascular aortic aneurysm repair
Rationale and objectives: Evaluation of the diagnostic value of linearly blended (LB) and virtual monoenergetic images (VMI) reconstruction techniques with and without metal artifacts reduction (MAR) and of adaptive statistical iterative reconstructions (ASIR) in the assessment of target vessels aft...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-10-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023079082 |
| _version_ | 1797646530641920000 |
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| author | Wojciech Kazimierczak Ewa Nowak Natalia Kazimierczak Tomasz Jankowski Agnieszka Jankowska Zbigniew Serafin |
| author_facet | Wojciech Kazimierczak Ewa Nowak Natalia Kazimierczak Tomasz Jankowski Agnieszka Jankowska Zbigniew Serafin |
| author_sort | Wojciech Kazimierczak |
| collection | DOAJ |
| description | Rationale and objectives: Evaluation of the diagnostic value of linearly blended (LB) and virtual monoenergetic images (VMI) reconstruction techniques with and without metal artifacts reduction (MAR) and of adaptive statistical iterative reconstructions (ASIR) in the assessment of target vessels after branched/fenestrated endovascular aortic repair (f/brEVAR) procedures. Materials and methods: CT scans of 28 patients were used in this study. Arterial phase of examination was obtained using a dual-energy fast-kVp switching scanner. CT numbers in the aorta, celiac trunk, superior mesenteric artery, and renal arteries were measured in the following reconstructions: LB, VMI 60 keV, VMI MAR 60 keV, VMI ASIR 60 % 60 keV. Contrast-to-noise ratio (CNR) and signal-to-noise ratio (SNR) were calculated for each reconstruction. Luminal diameters (measurements at 2 levels of stent) and subjective image quality (5-point Likert scale) were assessed (2 readers, blinded to the type of reconstruction). Results: The highest mean values of CNR and SNR in vascular structures were obtained in VMI MAR 60 keV (CNR 12.526 ± 2.46, SNR 17.398 ± 2.52), lower in VMI 60 keV (CNR 11.508 ± 2.01, SNR 16.524 ± 2.07) and VMI ASIR (CNR 11.086 ± 1.78, SNR 15.928 ± 1.82), and the lowest in LB (CNR 6.808 ± 0.79, SNR 11.492 ± 0.79) reconstructions. There were no statistically significant differences in the measurements of the stent width between reconstructions (p > 0.05). The highest subjective image quality was obtained in the ASIR VMI (4.25 ± 0.44) and the lowest in the MAR VMI (1.57 ± 0.5) reconstruction. Conclusion: Despite obtaining the highest values of SNR and CNR in the MAR VMI reconstruction, the subjective diagnostic value was the lowest for this technique due to significant artifacts. The type of reconstruction did not significantly affect vessel diameter measurements (p > 0.05). Iterative reconstructions raised both objective and subjective image quality. |
| first_indexed | 2024-03-11T15:03:00Z |
| format | Article |
| id | doaj.art-9884434ad2f54608ad2c2119f6ceba79 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-11T15:03:00Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-9884434ad2f54608ad2c2119f6ceba792023-10-30T06:07:04ZengElsevierHeliyon2405-84402023-10-01910e20700The value of metal artifact reduction and iterative algorithms in dual energy CT angiography in patients after complex endovascular aortic aneurysm repairWojciech Kazimierczak0Ewa Nowak1Natalia Kazimierczak2Tomasz Jankowski3Agnieszka Jankowska4Zbigniew Serafin5Collegium Medicum, Nicolaus Copernicus University in Torun, Jagiellońska 13-15, 85-067, Bydgoszcz, Poland; University Hospital No 1 in Bydgoszcz, Marii Skłodowskiej – Curie 9, 85-094, Bydgoszcz, Poland; Kazimierczak Private Medical Practice, Dworcowa 13/u6a, 85-009, Bydgoszcz, Poland; Corresponding author. Dworcowa 13/u6a, 85-009, Bydgoszcz, Poland.University Hospital No 1 in Bydgoszcz, Marii Skłodowskiej – Curie 9, 85-094, Bydgoszcz, PolandKazimierczak Private Medical Practice, Dworcowa 13/u6a, 85-009, Bydgoszcz, PolandJankowscy Private Dental Practice, Czerwonego Krzyża 24, 68-200, Żary, PolandJankowscy Private Dental Practice, Czerwonego Krzyża 24, 68-200, Żary, PolandCollegium Medicum, Nicolaus Copernicus University in Torun, Jagiellońska 13-15, 85-067, Bydgoszcz, Poland; University Hospital No 1 in Bydgoszcz, Marii Skłodowskiej – Curie 9, 85-094, Bydgoszcz, PolandRationale and objectives: Evaluation of the diagnostic value of linearly blended (LB) and virtual monoenergetic images (VMI) reconstruction techniques with and without metal artifacts reduction (MAR) and of adaptive statistical iterative reconstructions (ASIR) in the assessment of target vessels after branched/fenestrated endovascular aortic repair (f/brEVAR) procedures. Materials and methods: CT scans of 28 patients were used in this study. Arterial phase of examination was obtained using a dual-energy fast-kVp switching scanner. CT numbers in the aorta, celiac trunk, superior mesenteric artery, and renal arteries were measured in the following reconstructions: LB, VMI 60 keV, VMI MAR 60 keV, VMI ASIR 60 % 60 keV. Contrast-to-noise ratio (CNR) and signal-to-noise ratio (SNR) were calculated for each reconstruction. Luminal diameters (measurements at 2 levels of stent) and subjective image quality (5-point Likert scale) were assessed (2 readers, blinded to the type of reconstruction). Results: The highest mean values of CNR and SNR in vascular structures were obtained in VMI MAR 60 keV (CNR 12.526 ± 2.46, SNR 17.398 ± 2.52), lower in VMI 60 keV (CNR 11.508 ± 2.01, SNR 16.524 ± 2.07) and VMI ASIR (CNR 11.086 ± 1.78, SNR 15.928 ± 1.82), and the lowest in LB (CNR 6.808 ± 0.79, SNR 11.492 ± 0.79) reconstructions. There were no statistically significant differences in the measurements of the stent width between reconstructions (p > 0.05). The highest subjective image quality was obtained in the ASIR VMI (4.25 ± 0.44) and the lowest in the MAR VMI (1.57 ± 0.5) reconstruction. Conclusion: Despite obtaining the highest values of SNR and CNR in the MAR VMI reconstruction, the subjective diagnostic value was the lowest for this technique due to significant artifacts. The type of reconstruction did not significantly affect vessel diameter measurements (p > 0.05). Iterative reconstructions raised both objective and subjective image quality.http://www.sciencedirect.com/science/article/pii/S2405844023079082Endovascular aortic aneurysm repairStentDual-energy computed tomographyVirtual monoenergetic imagesIterative reconstructions |
| spellingShingle | Wojciech Kazimierczak Ewa Nowak Natalia Kazimierczak Tomasz Jankowski Agnieszka Jankowska Zbigniew Serafin The value of metal artifact reduction and iterative algorithms in dual energy CT angiography in patients after complex endovascular aortic aneurysm repair Heliyon Endovascular aortic aneurysm repair Stent Dual-energy computed tomography Virtual monoenergetic images Iterative reconstructions |
| title | The value of metal artifact reduction and iterative algorithms in dual energy CT angiography in patients after complex endovascular aortic aneurysm repair |
| title_full | The value of metal artifact reduction and iterative algorithms in dual energy CT angiography in patients after complex endovascular aortic aneurysm repair |
| title_fullStr | The value of metal artifact reduction and iterative algorithms in dual energy CT angiography in patients after complex endovascular aortic aneurysm repair |
| title_full_unstemmed | The value of metal artifact reduction and iterative algorithms in dual energy CT angiography in patients after complex endovascular aortic aneurysm repair |
| title_short | The value of metal artifact reduction and iterative algorithms in dual energy CT angiography in patients after complex endovascular aortic aneurysm repair |
| title_sort | value of metal artifact reduction and iterative algorithms in dual energy ct angiography in patients after complex endovascular aortic aneurysm repair |
| topic | Endovascular aortic aneurysm repair Stent Dual-energy computed tomography Virtual monoenergetic images Iterative reconstructions |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023079082 |
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