Method for controlling radiation dose and intravenous contrast dose in computed tomography imaging

摘要

A system and method for acquiring an image of a region of interest (ROI) of subject using a computed tomography (CT) system includes a) performing a scout scan of the subject using the CT system to yield scout data related to the ROI and b) determining an initial contrast volume form at least the scout data. The method also includes c) prescribing a scanning protocol to be implemented using the computed tomography system to image the ROI and d) determining a size of the subject about the ROI. The method further includes e) determining a computed tomography dose related to volume (CTDIvol) based on at least the size determined at step d) and f) adjusting the scanning protocol prescribed in step b) to match at least one of a desired radiation dose and a relative intravenous (IV) contrast dose to a reference CTDIvol. The method includes g) acquiring imaging data from the ROI using the CT system by using the adjusted scanning protocol.

主权项

1. A method for acquiring an image of a subject using a computed tomography (CT) system, the method comprising:
a) performing a scout scan of the subject using the CT system to yield scout data; b) determining an initial intravenous (IV) contrast volume from at least the scout data; c) prescribing a reference scanning protocol for a clinical task to be implemented using the CT system to image the subject; d) determining a radiation dose reduction relative to the reference scanning protocol that corresponds to an acceptable image contrast for the clinical task; e) determining a reduced intravenous contrast volume associated with the radiation dose reduction using a computed tomography dose index; f) adjusting the reference scanning protocol prescribed in step c) using the reduced IV contrast volume determined at step e); and g) acquiring imaging data of the subject using the CT system using the adjusted scanning protocol.