Isabelle Bloch

Isabelle Bloch, a Researcher and Professor at Télécom Paris since 1991, is currently working on the mathematical modeling of spatial relations in the LTCI laboratory, as part of the IMAGES group.

She builds mathematical models, which are then incorporated into algorithms to help interpret images, medical images especially. Applications in this field include the methods that Prof. Bloch offers to doctors to help them analyze and interpret images. To that end, she models the spatial relationships between objects and incorporates them in the analysis and interpretation process, to guide segmentation. This consists in  limiting the search area, to identify the contours and surfaces of an image’s different objects (here, organs or diseases) and to recognize them.

Prof. Bloch uses spatial reasoning, based mostly on algebraic methods such as mathematical morphology, fuzzy sets, logic. This research has many applications, especially in the field of medical imaging. Close collaboration with hospitals leads to diagnostic support, surgical planning – with less invasive surgery, care plans, monitoring programs and so on.

Prof. Bloch previously worked on data mergers. This process combines a range of data derived from images of varying origin that relate to the same problem and improves decision making on how to observe the object. This work on mergers now forms part of data processing tasks in various fields, including in current research on medical imaging and spatial reasoning.


Structures anatomiques du cerveau et une tumeur (Equipe IMAGES)
Picture taken from Olivier Nempont’s doctoral thesis. It shows anatomical structures and a tumor in color. They have been segmented and recognized, using spatial relations, and superimposed on the original MRI. Only three cross sections are visible on this figure.

Recently, Prof. Bloch has started work with Ircam (Institut de Recherche et Coordination Acoustique/Musique) researchers. The aim is to extend the spatial representation tools she is developing to possible ramifications in the spatial representation of music.

Prof. Bloch was awarded the Blondel medal in 2008, which recognizes outstanding work from a young scientist each year.