Lorenzo Piergallini1, Elisa Scola2, Bruno Tuscano1, Roberto Brambilla3, Mauro Campoleoni3, Gabriella Raimondi3, Luciano Lombardi2, Federica Di Berardino4, Diego Zanetti4, Clara Sina2, Fabio Triulzi5, Giorgio Conte6. 1. Università degli Studi di Milano, Postgraduation School of Radiodiagnostics, Milan, Italy. 2. Fondazione IRCCS Ca'Granda Ospedale Maggiore Policlinico, Neuroradiology Unit, Milan, Italy. 3. Fondazione IRCCS Ca'Granda Ospedale Maggiore Policlinico, Health Physics Unit, Milan, Italy. 4. Fondazione IRCCS Ca'Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Audiology Unit, Department of Clinical Sciences and Community, Milan, Italy. 5. Fondazione IRCCS Ca'Granda Ospedale Maggiore Policlinico, Neuroradiology Unit, Milan, Italy; Università degli Studi di Milano, Department of Pathophysiology and Transplantation, Milan, Italy. 6. Fondazione IRCCS Ca'Granda Ospedale Maggiore Policlinico, Neuroradiology Unit, Milan, Italy. Electronic address: giorgioconte.unimed@gmail.com.
Abstract
OBJECTIVE: We compared the image quality and radiation dose of flat-panel CT (FPCT) and multi-slice CT (MSCT) performed respectively with an angiographic unit and a 128-slice CT scanner. We investigated whether the higher spatial resolution of FPCT translated into higher image quality and we sought to eliminate inter-subject variability by scanning temporal bone specimens with both techniques. MATERIALS AND METHODS: Fifteen temporal bone specimens were imaged with FPCT and MSCT. Two neuroradiologists experienced in otoradiology evaluated 30 anatomical structures with a 0-2 score; 18 structures important from a clinical perspective were assigned a twofold value in calculation of the overall score. The radiation dose was calculated through the use of an anthropomorphic phantom. RESULTS: The image quality was significantly higher for FPCT than MSCT for 10 of the 30 anatomical structures; the overall score was also significantly higher for FPCT (p = 0.001). The equivalent dose of the two techniques was very similar, but with different effective doses to the organs. CONCLUSION: FPCT performed on an angiographic unit provides higher image quality in temporal bone assessment compared to MSCT performed on a 128-slice CT scanner thanks to its higher spatial resolution, with comparable equivalent doses but different effective doses to the organs.
OBJECTIVE: We compared the image quality and radiation dose of flat-panel CT (FPCT) and multi-slice CT (MSCT) performed respectively with an angiographic unit and a 128-slice CT scanner. We investigated whether the higher spatial resolution of FPCT translated into higher image quality and we sought to eliminate inter-subject variability by scanning temporal bone specimens with both techniques. MATERIALS AND METHODS: Fifteen temporal bone specimens were imaged with FPCT and MSCT. Two neuroradiologists experienced in otoradiology evaluated 30 anatomical structures with a 0-2 score; 18 structures important from a clinical perspective were assigned a twofold value in calculation of the overall score. The radiation dose was calculated through the use of an anthropomorphic phantom. RESULTS: The image quality was significantly higher for FPCT than MSCT for 10 of the 30 anatomical structures; the overall score was also significantly higher for FPCT (p = 0.001). The equivalent dose of the two techniques was very similar, but with different effective doses to the organs. CONCLUSION: FPCT performed on an angiographic unit provides higher image quality in temporal bone assessment compared to MSCT performed on a 128-slice CT scanner thanks to its higher spatial resolution, with comparable equivalent doses but different effective doses to the organs.
Authors: Franz-Tassilo Müller-Graff; Lukas Ilgen; Philipp Schendzielorz; Johannes Voelker; Johannes Taeger; Anja Kurz; Rudolf Hagen; Tilmann Neun; Kristen Rak Journal: Eur Arch Otorhinolaryngol Date: 2021-06-08 Impact factor: 3.236
Authors: Felix Eisenhut; Lava Taha; Michael Manhart; Vivian Thimsen; Konstantinos Mantsopoulos; Heinrich Iro; Joachim Hornung; Arnd Dörfler; Stefan Lang Journal: Neuroradiology Date: 2022-04-12 Impact factor: 2.995