Jan-Erik Scholtz1, Julian L Wichmann2, Kristina Hüsers2, Martin Beeres2, Nour-Eldin Abdelrehim Nour-Eldin3, Claudia Frellesen2, Thomas J Vogl2, Thomas Lehnert2. 1. Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590 Frankfurt, Germany. Electronic address: janerikscholtz@gmail.com. 2. Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590 Frankfurt, Germany. 3. Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590 Frankfurt, Germany; Diagnostic and Interventional Radiology Department, Cairo University Hospital, Cairo, Egypt.
Abstract
RATIONALE AND OBJECTIVES: To evaluate image quality and radiation exposure of portal venous-phase thoracoabdominal third-generation 192-slice dual-source computed tomography (DSCT) with automated tube voltage adaptation (TVA) in combination with advanced modeled iterative reconstruction (ADMIRE). MATERIALS AND METHODS: Fifty-one patients underwent oncologic portal venous-phase thoracoabdominal follow-up CT twice within 7 months. The initial examination was performed on second-generation 128-slice DSCT with fixed tube voltage of 120 kV in combination with filtered back projection reconstruction. The second examination was performed on a third-generation 192-slice DSCT using automated TVA in combination with ADMIRE. Attenuation and image noise of liver, spleen, renal cortex, aorta, vena cava inferior, portal vein, psoas muscle, and perinephric fat were measured. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were calculated. Radiation dose was assessed as size-specific dose estimates (SSDE). Subjective image quality was assessed by two observers using five-point Likert scales. Interobserver agreement was calculated using intraclass correlation coefficients (ICC). RESULTS: Automated TVA set tube voltage to 90 kV (n = 8), 100 kV (n = 31), 110 kV (n = 11), or 120 kV (n = 1). Average SSDE was decreased by 34.9% using 192-slice DSCT compared to 128-slice 120-kV DSCT (7.8 ± 2.4 vs. 12.1 ± 3.2 mGy; P < .001). Image noise was substantially lower; SNR and CNR were significantly increased in 192-slice DSCT compared to 128-slice DSCT (all P < .005). Image quality was voted excellent for both acquisition techniques (5.00 vs. 4.93; P = .083). CONCLUSIONS: Automated TVA in combination with ADMIRE on third-generation 192-slice DSCT in portal venous-phase thoracoabdominal CT provides excellent image quality with reduced image noise and increased SNR and CNR, whereas average radiation dose is reduced by 34.9% compared to 128-slice DSCT.
RATIONALE AND OBJECTIVES: To evaluate image quality and radiation exposure of portal venous-phase thoracoabdominal third-generation 192-slice dual-source computed tomography (DSCT) with automated tube voltage adaptation (TVA) in combination with advanced modeled iterative reconstruction (ADMIRE). MATERIALS AND METHODS: Fifty-one patients underwent oncologic portal venous-phase thoracoabdominal follow-up CT twice within 7 months. The initial examination was performed on second-generation 128-slice DSCT with fixed tube voltage of 120 kV in combination with filtered back projection reconstruction. The second examination was performed on a third-generation 192-slice DSCT using automated TVA in combination with ADMIRE. Attenuation and image noise of liver, spleen, renal cortex, aorta, vena cava inferior, portal vein, psoas muscle, and perinephric fat were measured. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were calculated. Radiation dose was assessed as size-specific dose estimates (SSDE). Subjective image quality was assessed by two observers using five-point Likert scales. Interobserver agreement was calculated using intraclass correlation coefficients (ICC). RESULTS: Automated TVA set tube voltage to 90 kV (n = 8), 100 kV (n = 31), 110 kV (n = 11), or 120 kV (n = 1). Average SSDE was decreased by 34.9% using 192-slice DSCT compared to 128-slice 120-kV DSCT (7.8 ± 2.4 vs. 12.1 ± 3.2 mGy; P < .001). Image noise was substantially lower; SNR and CNR were significantly increased in 192-slice DSCT compared to 128-slice DSCT (all P < .005). Image quality was voted excellent for both acquisition techniques (5.00 vs. 4.93; P = .083). CONCLUSIONS: Automated TVA in combination with ADMIRE on third-generation 192-slice DSCT in portal venous-phase thoracoabdominal CT provides excellent image quality with reduced image noise and increased SNR and CNR, whereas average radiation dose is reduced by 34.9% compared to 128-slice DSCT.
Authors: Doris Leithner; Tatjana Gruber-Rouh; Martin Beeres; Julian L Wichmann; Scherwin Mahmoudi; Simon S Martin; Lukas Lenga; Moritz H Albrecht; Christian Booz; Thomas J Vogl; Jan-Erik Scholtz Journal: Br J Radiol Date: 2018-06-05 Impact factor: 3.039
Authors: Doris Leithner; Julian L Wichmann; Scherwin Mahmoudi; Simon S Martin; Moritz H Albrecht; Thomas J Vogl; Jan-Erik Scholtz Journal: Br J Radiol Date: 2018-03-08 Impact factor: 3.039
Authors: Emily Hammond; Chelsea Sloan; John D Newell; Jered P Sieren; Melissa Saylor; Craig Vidal; Shayna Hogue; Frank De Stefano; Alexa Sieren; Eric A Hoffman; Jessica C Sieren Journal: Med Phys Date: 2017-08-02 Impact factor: 4.071
Authors: Clara Park; Tatjana Gruber-Rouh; Doris Leithner; Amelie Zierden; Mortiz H Albrecht; Julian L Wichmann; Boris Bodelle; Mohamed Elsabaie; Jan-Erik Scholtz; Moritz Kaup; Thomas J Vogl; Martin Beeres Journal: Cancer Imaging Date: 2016-10-10 Impact factor: 3.909
Authors: Jan-Erik Scholtz; Julian L Wichmann; Kristina Hüsers; Moritz H Albrecht; Martin Beeres; Ralf W Bauer; Thomas J Vogl; Boris Bodelle Journal: Eur Radiol Date: 2015-11-11 Impact factor: 5.315
Authors: Patrick D McLaughlin; Liam Chawke; Maria Twomey; Kevin P Murphy; Siobhán B O'Neill; Sebastian R McWilliams; Karl James; Richard G Kavanagh; Charles Sullivan; Faimee E Chan; Niamh Moore; Owen J O'Connor; Joseph A Eustace; Michael M Maher Journal: Insights Imaging Date: 2017-10-23