Lowering Kilovoltage to Reduce Radiation Dose in Contrast-Enhanced Abdominal CT: Initial Assessment of a Prototype Automated Kilovoltage Selection Tool

摘要: OBJECTIVE. The purpose of this study was to determine whether the use an automated CT kilovoltage (kV) selection tool (Auto kV) can result in lower radiation dose without sacrificing image quality contrast-enhanced abdominopelvic CT. MATERIALS AND METHODS. Tube potential, dose, and iodine contrast-to-noise ratio (CNR) were retrospectively evaluated 36 patients who underwent with Auto kV, compared results from size-matched control using identical protocols. Two radiologists (sharpness, noise, diagnostic confidence) blinded kV. Volume index (CTDIvol) also what each patient would have received scanning at 120 RESULTS. Mean (SD) CTDIvol 16.0 (4.4) mGy after kV versus 19.5 (4.0) standard 120-kV prescription 19.3 (6.0) subjects (yielding reductions 18.0% 17.2%, respectively; p < 0.001 for both). Thirty scanned 100 kV...