Novadaq Technologies, Inc.

Stryker European Operations Limited

Novadaq Technologies Ulc

Peter Dvorsky

David Mark Henri Goyette

Cheng Chen

T Bruce Ferguson, Jr

Ferguson T Bruce Bruce

David M H Goyette

T Bruce Ferguson

David Mark Goyette

Chen Cheng

Jr T Bruce Ferguson

Bruce T Ferguson Jr

Vessel perfusion and myocardial blush are determined by analyzing fluorescence signals obtained in a static region-of-interest (ROI) in a collection of fluorescence images of myocardial tissue. The blush value is determined from the total intensity of the intensity values of image elements located within the smallest contiguous range of image intensity values containing a predefined fraction of a total measured image intensity of all image elements within the ROI. Vessel (arterial) peak intensity is determined from image elements located within the ROI that have the smallest contiguous range of highest measured image intensity values and contain a predefined fraction of a total measured image intensity of all image elements within the ROI. Cardiac function can be established by comparing the time differential between the time of peak intensity in a blood vessel and that in a region of neighboring myocardial tissue both pre and post procedure.

Method for evaluating blush in myocardial tissue

A method and an apparatus for preoperative identification of a perforator vessel for plastic and/or reconstructive surgery using ICG fluorescence angiography imaging are disclosed. Time-resolved image processing is used to highlight perforator locations and to enable visual discrimination among candidate perforators by various computed metrics. Based on these metrics, the surgeon is able to interactively locate and select perforator vessels suitable for plastic and reconstructive surgery.

Locating and analyzing perforator flaps for plastic and reconstructive surgery

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Toronto, Canada

Peter Dvorsky