Third-generation iterative reconstruction on a dual-source, high-pitch, low-dose chest CT protocol with tin filter for s
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CHEST RADIOLOGY
Third‑generation iterative reconstruction on a dual‑source, high‑pitch, low‑dose chest CT protocol with tin filter for spectral shaping at 100 kV: a study on a small series of COVID‑19 patients Andrea Agostini1,2 · Alessandra Borgheresi2 · Marina Carotti1,2 · Letizia Ottaviani2 · Myriam Badaloni2 · Chiara Floridi1,2 · Andrea Giovagnoni1,2 Received: 2 June 2020 / Accepted: 23 September 2020 © Italian Society of Medical Radiology 2020
Abstract Objectives To investigate the role of third-generation iterative reconstruction (ADMIRE) in dual-source, high-pitch chest CT protocol with spectral shaping at 100 kVp in Coronavirus disease 2019 (COVID-19). Methods Confirmed COVID-19 inpatients undergoing to unenhanced chest CT were scanned with a dual-energy acquisition (DECT, 90/150Sn kV) and a dual-source, high-pitch acquisition with tin-filtered 100 kVp (LDCT). On the DECT with ADMIRE 3 (DECT3) were evaluated the pulmonary findings and their extension (25-point score). Two radiologists in consensus evaluated with 5-point scales the overall image quality, the anatomical structures, and the elementary findings on LDCT reconstructed with filtered backprojection (LDCT0), with ADMIRE 3 (LDCT3) and 5 (LDCT5), and on DECT3. The signal-to-noise ratio (SNR), the body mass index, the exposure times, and the radiation doses were recorded. Results Seventy-five patients (57 M/18F; median age: 63 y.o.) were included, with median pulmonary extension of 13/25 points. The imaging findings were detected in proportion comparable to the available literature. The ADMIRE significantly improved the SNR in LDCT (p
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