A pulse oximeter is a medical device that displays a digital percentage readout of a calculated value of the hemoglobin that is saturated with oxygen (SpO2).

Reconstruction is the mathematical process by which the displayed image is produced from the raw data.
Used equipment and data processing methods to reconstruct CT images:
See also Zoom Reconstruction, Reconstruction Matrix and Multiplanar Reconstruction.

A zoom reconstruction is the enlarged reconstruction of a part of an image. A zoom reconstruction uses the raw data of a scan. Zooming or targeting requires the operator to manipulate the displayed field of view.