Abstract: A particle filtering face half mask (100) configured to provide respiratory protection and to contact a nasal region, cheeks and a chin of a user. The face half mask (100) comprises a main body (102) configured to cover nostrils and a mouth of a user, and a seal (104) configured to form an interface between the main body (102) and a skin surface of the user, the seal (104) configured to prevent the ingress of undesired particles into the face half mask (100). The seal (104) is releasably connectable to a perimeter of the main body (102).

Abstract: Systems and methods for generating annotations associated with medical imaging data are disclosed. A method described herein includes receiving volumetric medical imaging data including a structure, displaying a first node of a branching annotation on top of the medical imaging data responsive to input from a user, and extending the branching annotation through the structure by displaying a continuous path between the first node and at least a second node of the branching annotation.