Abstract: Methods and devices for generating a cubic Bézier curve between a first point and a second point from a sequence of ordered points. One embodiment provides a method that includes selecting a third point from the sequence of ordered points; determining a first control point based on the first point, the second point, and the third point; selecting a fourth point from the sequence of ordered points; determining a second control point based on the first point, the second point, and the fourth point; and generating a cubic Bézier curve between the first point and the second point using the first control point and the second control point.

Abstract: A system for generating measurements and calculations on an image previously generated during a procedure. In one embodiment, the system includes an image display application configured to display the image previously generated during the procedure and a supplemental measurement tool configured to display one or more measurement types to a user, allow the user to select a measurement type, record a measurement made by the user of the selected measurement type on the displayed image, and automatically generate one or more calculations based on the recorded measurements.