Fiducial Error
Fiducial error, also known as fiducial marker error, is a measure of the accuracy and precision of the positioning of fiducial markers in medical imaging. Fiducial markers are small, identifiable objects placed within or on the body during medical imaging procedures, such as computed tomography (CT) or magnetic resonance imaging (MRI), to provide a reference point for the area's location of interest.
The fiducial error is the difference between the actual location of the fiducial marker and where it is identified or located by the imaging system. It is usually measured in millimeters and can be affected by factors such as the size and shape of the fiducial marker, the imaging technique used, and the skill of the technician placing the marker.
The fiducial error is essential to consider as it can affect the accuracy of the image and the ability to align and register images from different imaging modalities properly. A high fiducial error can lead to an inaccurate diagnosis and negatively impact a treatment plan's outcome. In summary, Fiducial error is a measure of the accuracy and precision of the positioning of fiducial markers in medical imaging. It is the difference between the actual location of the fiducial marker and where it is identified or located by the imaging system and is usually measured in millimeters.
The fiducial error of a measuring instrument; fiducial error: terms and definition approved by ISO, the International Bureau of Weights and Measures (BIPM), the International Electrotechnical Commission (IEC), the International Organization of Legal Metrology (OIML), and others [Claude].
The specified value is generally called the fiducial value. It may be, for example, the span or the upper limit of the nominal range of the measuring instrument
Fiducial Marker. Retrieved from https://en.wikipedia.org/wiki/Fiducial_marker