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• W2381139277 abstract "Objective To investigate the influence of dual-source CT using 2. 0-pitch and 3. 2-pitch acquisition mode on the image quality and radiation dose in angiography of aorta and solid organs so as to determine the optimal scanning protocol. Methods Dual-source CT scanning of aorta was performed in 40 patients with suspected aortic disease. The patients were prospectively,randomly and equally divided into group A( using 2. 0-pitch scanning mode) and group B( using3. 2-pitch scanning mode). The mean CT values of aorta and solid organs( liver and spleen),the mean background noise( SD),the signal-to-noise ratio( SNR) and the contrast-to-noise ratio( CNR) of the two groups were separately calculated.The radiation dose,acquisition time,and scanning length were also recorded. The quantitative image quality parameters and radiation dose were statistically analyzed by using independent-sample student's t test with SPSS19. 0 software. Results( 1) The image quality score of aorta was 3 in all 40 cases. In group A,the aortic quality score was 3. 65 ± 0. 49 and the quality score of solid organ was 4. 25 ± 0. 55,both of which were higher than those in group B( 3. 20 ± 0. 41 and 3.85 ± 0. 37 respectively),the differences were statistically significant( t = 3. 151 and t = 2. 707; P 0. 5).( 2) The mean CT value of aorta in group A and group B was( 411. 47 ± 117. 82) HU and( 341. 10 ± 85. 92) HU respectively,the difference between the two groups was statistically significant( t = 5. 286,P 0. 05). The mean CT value of the liver and spleen in group A was( 63. 60 ± 10. 81) HU and( 103. 65 ± 26. 48) HU respectively,which was( 59. 25 ± 15. 09) HU and( 98.70 ± 22. 28) HU respectively in group B,and the difference between the two groups was not significant( t = 1. 048 and t =0. 640; P 0. 05). The mean SD,SNR and CNR of aortic area in group A were 12. 59 ± 1. 79,33. 47 ± 10. 87 and 28. 97± 10. 15 respectively,and were 14. 61 ± 2. 49,24. 05 ± 7. 78 and 20. 52 ± 7. 19 respectively in group B,the difference between the two groups was statistically significant( t =- 7. 202,t = 7. 711 and t = 7. 437 respectively; P 0. 05). The mean SD of liver and spleen in group A was 11. 55 ± 1. 32 and 15. 60 ± 2. 30 respectively,which was lower than those in group B( 12. 45 ± 1. 19 and 17. 70 ± 3. 26 respectively). The mean SNR of liver and spleen in group A( 5. 61 ± 1. 35 and6. 60 ± 1. 18 respectively) was higher than those in group B( 4. 75 ± 1. 12 and 5. 62 ± 1. 07 respectively),the difference between the two groups was statistically significant( t =- 2. 267,t =- 2. 352,t = 2. 186 and t = 2. 749 respectively; P 0. 05).( 3) The CTD,DLP and ED in group A were( 4. 55 ± 0. 71) mG y,( 80. 25 ± 47. 10) mG y / cm and( 4. 77 ±0. 80) mS v respectively,which were( 4. 49 ± 0. 67) mG y,( 261. 05 ± 41. 95) mG y / cm and( 4. 44 ± 0. 71) mS v respectively in group B,and no statistically significant differences existed between the two groups( t = 0. 282,t =- 1. 361 and t=- 1. 367 respectively; P 0. 05). Conclusion The radiation doses of 2. 0-pitch and 3. 2-pitch scanning mode are quite similar,but 2. 0-pitch scanning mode can provide more clear images of solid organs and it is more suitable for the diagnosis of aortic disease than 3. 2 pitch scanning." @default.
• W2381139277 created "2016-06-24" @default.
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• W2381139277 date "2014-01-01" @default.
• W2381139277 modified "2023-09-23" @default.
• W2381139277 title "The Influence of Dual-Source CT Using 2.0-Pitch and 3.2-Pitch Acquisition Mode on the Image Quality and Radiation Dose in Angiography of Aorta and Solid Organs: A Comparative Study" @default.
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