The present invention relates to a system (10) for guiding an instrument (12, 100, 100A, 100B, 112) in a body (14). The system (10) records an image where the instrument (12, 100, 100A,100B, 112) is identifiable and the instrument (12, 100, 100A, 100B, 112) records signals indicative of the type of tissue at the instrument (12, 100, 100A, 100B, 112). The system (10) determines the tissue type based on a signal from the instrument (12, 100, 100A, 100B, 112). The system (10) displays an image being a combined image of the body (14) and instrument (12, 100, 100A, 100B, 112) and an indication of tissue type at a position where the tissue type was determined. The present invention further relates to a method of displaying an image comprising tissue-type and instrument position in a body. The present invention further relates to an instrument and a software implemented method for being executed on a digital processor.
