Saturday, July 1, 2017

Counting impacts on a target (Traces of heavy ions beam)

When studying effect of ionizing radiation (heavy ions with high LET) on cells, the fluence (particules/cm²) of the particles beam must be known. Detectors in the GANIL (Caen, France) particles accelerator can estimate the fluence. However, when irradiating cells, radiobiologists (Testard I, CEA CIRIL) need to localize the impacts of the ions and to count the number of impact per cell.

The application TRACES (scripts for the aphelion application) was developped: It was capable of recording and saving images from a camera, segmenting and counting traces: 
The application was designed to analyse images as the following:

raw image of traces

Distinguishing traces resulting from one or several impacts can be done from the python ecosystem :