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lüll Applications of particle microbeams in space radiation research Durante MJ Radiat Res 2009[Mar]; 50 Suppl A (ä): A55-8Galactic cosmic radiation is acknowledged as one of the major barriers to human space exploration. In space, astronauts are exposed to charged particles from Z = 1 (H) up to Z = 28 (Ni), but the probability of a hit to a specific single cell in the human body is low. Particle microbeams can deliver single charged particles of different charge and energy to single cells from different tissues, and microbeam studies are therefore very useful for improving current risk estimates for long-term space travel. 2D in vitro cell cultures can be very useful for establishing basic molecular mechanisms, but they are not sufficient to extrapolate risk, given the substantial evidence proving tissue effects are key in determining the response to radiation insult. 3D tissue or animal systems represent a more promising target for space radiobiology using microbeams.|*Dose-Response Relationship, Radiation[MESH]|*Research[MESH]|Animals[MESH]|Biological Assay/*instrumentation/methods[MESH]|Cell Culture Techniques/*instrumentation/methods[MESH]|Cell Physiological Phenomena/*radiation effects[MESH]|Equipment Design[MESH]|Humans[MESH]|Radiation Dosage[MESH]|Radiobiology/*instrumentation/methods[MESH]|Space Flight/*instrumentation[MESH] |