Original name record: Stryker Corporation

The present disclosure relates to techniques for imaging tissue of a subject. An exemplary method comprises transitioning the liquid crystal light shutter to the closed state to prevent the global shutter imager from receiving visible light; illuminating the tissue of the subject with the fluorescence excitation illumination source to accumulate charge at a plurality of pixels of the global shutter imager, while the liquid crystal light shutter is in the closed state; reading a set of accumulated charge at the plurality of pixels of the global shutter imager to produce a set of imaging data; and generating a fluorescence image frame based on the set of imaging data.

A method of visualizing tissue of a subject includes receiving a fluorescence image of the tissue including a plurality of intensity values. A first portion of the intensity values is associated with a first fluorescence emission that is from fluorescence agent that is preferentially accumulated or activated in a target region in the tissue, and a second portion of the intensity values is associated with a second fluorescence emission that is from fluorescence agent that is not located within the target region. The intensity values are analyzed to determine a set of local maximum intensity values. An enhanced fluorescence image is generated by applying a nonlinear contrast mapping based on the set of local maximum intensity values to the plurality of intensity values. The enhanced fluorescence image is displayed, and at least a portion of the target region is diagnosed or treated based on the displayed enhanced fluorescence image.

CPR systems and/or CPR devices that are configured to operate in association with a particular duty cycle are disclosed. An example mechanical chest compression device includes a processor(s) and a chest compressing mechanism configured to be disposed on a chest of a subject and to move for administering chest compressions to the subject. The processor(s) is configured to cause the chest compressing mechanism to move for administering the chest compressions to the subject over a series of compression-decompression cycles, wherein a compression-decompression cycle of the series of compression-decompression cycles includes a compression phase that is shorter than a decompression phase. The processor(s) is further configured to determine, during the compression phase, that a criterion is satisfied, and to cause the chest compressing mechanism to transition to movement that corresponds to the decompression phase in response to determining that the criterion is satisfied.