Peristaltic Contrast Media Injection Improved Image Quality and Decreased Radiation and Contrast Dose When Compared With Direct Drive Injection During Liver Computed Tomography. Issue 2 (March 2020)

• Record Type: Journal Article
• Authors: Saade, Charbel; Karout, Lina; Khalife, Sarah; Mayat, Ahmad; Pillay, Sugendran; Chan, Edward; Maroun, Gilbert; Alam, Raquelle; Shattal, Mohammad Abu; Naffaa, Lena
• Is Part Of: Journal of computer assisted tomography. Volume 44:Issue 2(2020)
• Publication Date: 2020-03
• Subjects: computed tomography -- contrast media -- injector -- liver; Tomography -- Periodicals; Tomography -- Periodicals; Tomography; Periodicals; 616.0757
• DOI: 10.1097/RCT.0000000000000994
• Languages: English
• ISSNs: 0363-8715

Abstract

Abstract : Purpose: The aim of this study was to compare hepatic vascular and parenchymal image quality between direct and peristaltic contrast injectors during hepatic computed tomography (HCT). Methods: Patients (n = 171) who underwent enhanced HCT and had both contrast media protocols and injector systems were included; group A: direct-drive injector with fixed 100 mL contrast volume (CV), and group B: peristaltic injector with weight-based CV. Opacification, contrast-to-noise ratio, signal-to-noise ratio, radiation dose, and CV for liver parenchyma and vessels in both groups were compared by paired t test and Pearson correlation. Receiver operating characteristic curve, visual grading characteristics, and Cohen κ were used. Results: Contrast-to-noise ratio: compared with hepatic vein for functional liver, contrast-to-noise ratio was higher in group B (2.17 ± 0.83) than group A (1.82 ± 0.63); portal vein: higher in group B (2.281 ± 0.96) than group A (2.00 ± 0.66). Signal-to-noise ratio for functional liver was higher in group B (5.79 ± 1.58 Hounsfield units) than group A (4.81 ± 1.53 Hounsfield units). Radiation dose and contrast media were lower in group B (1.98 ± 0.92 mSv) (89.51 ± 15.49 mL) compared with group A (2.77 ± 1.03 mSv) (100 ± 1.00 mL). Receiver operating characteristic curve demonstrated increased reader in group B (95% confidence interval, 0.524–1.0) than group A (95% confidence interval, 0.545–1.0). Group B had increased revenue up to 58% compared with group A. Conclusions: Image quality improvement is achieved with lower CV and radiation dose when using peristaltic injector with weight-based CV in HCT.