Light-powered light-emitting tissue marker

A medical imaging device, comprising an image sensor to capture an image and a light source to provide ambient light for the light sensor, and a synchronizer logic operable to cause the light source being switched into at least two intensity states, a low intensity state and a high intensity state, whilst capturing images, the said switching on and off being set at a preset frequency or wherein the switching between the two intensities is in response to an external switching signal received by the synchronizer logic through an interface of the device.

Method for marker-based navigation, comprising the steps of:

• capturing a first image with a medical imaging apparatus, whilst a light source of an implanted marker device is in a low intensity state and a second light source of the medical imaging apparatus is in a high intensity state, higher than the low intensity state of the marker;
• and
• capturing a second image with the medical imaging apparatus, whilst the light source of the implanted marker device is in a high intensity state and the second light source of the medical imaging apparatus is in a low intensity state, lower than the high intensity state of the marker.