Evaluation of dose modulation software through the assessment of body mass index, radiation dose and image noise.

Purpose: This study attempts to establish a quantitative link between a patient's body mass index (BMI), the delivered radiation dose, and the image noise.

Methods: The CARE Dose4D computed tomography (CT) acquisitions from 206 patients undergoing "eyes-to-thighs" contrast-enhanced positron emission tomography/CT studies were retrospectively examined. Computed tomography dose index volume (CTDIVOL), mAs, and dose-length product were recorded from the dose report card.