title: [Combinations of scan parameters and image quality at C-arm CT for abdominal imaging].
abstract: We measured the contrast-to-noise ratio (CNR) and evaluated low-contrast images and streak artifacts to optimize abdominal C-arm CT imaging, and we investigated the view number, acquisition matrix, and pixel depth. To measure CNR, we filled 0.125-1.0-inch cavities in an American Association of Physicists in Medicine (AAPM) CT performance phantom with a sodium chloride solution. Five radiological technologists visually evaluated the noise, signal conspicuity at low-and high-signal density, and the overall image quality using paired comparisons based on Thurstone's law. In a given acquisition matrix, the total view number had the greatest effect on the image noise, artifacts, and signal detectability on C-arm CT images. For a given incident dose per view on the flat-panel detector (FPD), fewer images with noise and streak artifacts resulted when a larger view number was selected.
authors: Department of Radiology, Kumamoto University Hospital.
authors: Nozomu
authors: N
authors: Nagasue
authors: Yoshinori
authors: Y
authors: Funama
authors: Rika
authors: R
authors: Oniki
authors: Atsushi
authors: A
authors: Segawa
authors: Satoshi
authors: S
authors: Iwatake
authors: Tomohiko
authors: T
authors: Kawachino
authors: Masataka
authors: M
authors: Uetani
mesh_terms: D054893:Cone-Beam Computed Tomography / Q000295:instrumentation; D021621:Imaging, Three-Dimensional; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D011860:Radiography, Abdominal / Q000295:instrumentation