10. A method, implemented at a computer system that includes one or more processors, for annotating a graphical element, the method comprising: displaying one or more graphical elements at a user interface, the one or more graphical elements representing one or more anatomical structures; simultaneous to display of the one or more graphical elements, displaying a user-selectable annotation button that, when selected, enables specification one or more points of the one or more graphical elements for annotation; receiving user input selecting the annotation button; subsequent to receiving the user input selecting the annotation button, receiving user input specifying a particular point of the one or more graphical elements for entry of an annotation; subsequent to receiving the user input specifying the particular point of the one or more graphical elements for entry of an annotation, displaying an annotation dialogue that provides selection of a plurality of annotation options for annotating the specified particular point, the annotation dialogue being visually associated with the specified particular point of the one or more graphical elements, the annotation dialogue including: one or more highlighting options for visually emphasizing the specified particular point, including one or more of shapes or colors; and one or more comment input options for providing information relevant to the specified particular point, including one or more of text or audio input; receiving user input selecting one or more of the highlighting options and one or more of the comment input options; receiving user comment input that provides at least one comment corresponding to the user comment input; and displaying the one or more graphical elements along with the selected annotation, including the selected highlighting options and the inputted at least one comment.
10. A method, implemented at a computer system that includes one or more processors, for annotating a graphical element, the method comprising: displaying one or more graphical elements at a user interface, the one or more graphical elements representing one or more anatomical structures; simultaneous to display of the one or more graphical elements, displaying a user-selectable annotation button that, when selected, enables specification one or more points of the one or more graphical elements for annotation; receiving user input selecting the annotation button; subsequent to receiving the user input selecting the annotation button, receiving user input specifying a particular point of the one or more graphical elements for entry of an annotation; subsequent to receiving the user input specifying the particular point of the one or more graphical elements for entry of an annotation, displaying an annotation dialogue that provides selection of a plurality of annotation options for annotating the specified particular point, the annotation dialogue being visually associated with the specified particular point of the one or more graphical elements, the annotation dialogue including: one or more highlighting options for visually emphasizing the specified particular point, including one or more of shapes or colors; and one or more comment input options for providing information relevant to the specified particular point, including one or more of text or audio input; receiving user input selecting one or more of the highlighting options and one or more of the comment input options; receiving user comment input that provides at least one comment corresponding to the user comment input; and displaying the one or more graphical elements along with the selected annotation, including the selected highlighting options and the inputted at least one comment. 18. The method of claim 10 , wherein displaying one or more graphical elements at the user interface comprises overlaying a virtual model over an image.