MedicalXpress -- The therapeutic action of medical radioisotopes is usually dominated by emitted electrons, but an additional weak emission of low energy gamma rays can be favorable as it allows on-line monitoring of the radioisotope’s distribution in the patient’s body with gamma cameras. Image of test phantoms taken with a small-animal SPECT camera shows that the new radioisotope 161Tb is well suited for imaging purposes (as well as therapeutic), providing even better position resolution than the gamma rays of 177Lu.
