Akademik Veri Yönetim Sistemi
EUROSON SCHOOL 2022, İstanbul, Türkiye, 1 - 02 Ekim 2022, ss.28-29
Purpose: The
recently developed ultrasound based tools using attenuation coefficient (AC)
and backscatter coefficient (BSC) values for the quantification of hepatic fat
content have gained popularity in the evaluation of patients with non-alcoholic
fatty liver disease (NAFLD). However, currently the impact of respiratory phase
on these measurements is not known. In this study, we aimed to compare AC and
BSC measurements obtained at peak inspiration and end expiration phases.
Materials and methods: AC
and BSC measurements were obtained in 50 patients with NAFLD. All patients were
examined with a single ultrasound device (RS85 Prestige, Samsung Medison Co.
Ltd.) with a convex probe (1-7 MHz). Vendor specific TAI and TSI tools were
utilized to measure AC and BSC values, respectively. Right intercostal approach
was used for evaluation. Five measurements were obtained at peak inspiration
phase using TAI and TSI tools, independently. Then, similar to peak inspiration
phase, five measurements were obtained at end expiration phase using TAI and
TSI tools. The median values were noted for each phase and tool (Figure 1).
Wilcoxon signed rank test was used for comparison of the measurements.
Results: Fifty patients (35 female, 15 male) were included in
the study. The mean age of the included patients was 53.2±9.7 years. The median
values of the TAI measurements at peak inspiration and end expiration phases
were 0.87 [Interquartile range (IQR): 0.77-1.04] dB/cm/MHz and 0.89 (IQR:
0.77-1.03) dB/cm/MHz, respectively. The median values of the TSI measurements
at peak inspiration and end expiration phases were 97.91 (IQR: 93.91-99.95) and
96.62 (IQR: 93.00-99.68), respectively. There were no statistically significant
differences in AC and BSC measurements between the respiratory phases (P >0.05).
Conclusion:
Our results revealed that there are no significant differences in AC and BSC
values obtained using TAI and TSI tools between the respiratory phases. These
findings suggest that AC and BSC values can be measured regardless of the phase
of respiration.