Medical dosimetry with alanine

Research and development are carried out within the field of medical reference dosimetry using EPR (electron spin ressonance) of alanine. The current research focusses on applications in external beam radiotherapy (MV photons with or without strong magnetic fields). Applications include dosimetry in the context of animal irradiations.  

Three alanine pellets are placed in a special water-tight holder as shown below. 

Alanine pellets ready for dosimetry

The holder as the shape of a conventional Farmer-type ionization chamber.

DTU holder for alanine pellets aimed for absorbed dose measurements in water.

Irradiation of alanine pellets in the DTU linac beam.

Alanine pellets during irradiation in DTU linac.


Christina Ankjærgaard
Head of Dosimetry, senior researcher
DTU Health Tech
+45 93 51 19 80


Claus E. Andersen
Senior researcher
DTU Health Tech
+45 46 77 49 12


Mark Bailey
R&D Engineer
DTU Health Tech
+45 93 51 14 80