  Our purpose is to measure the internal radiation dose (ID) using human blood
sample. In the literature, there is no process that allows the direct
measurement of ID received by a person. This study has shown that it is
possible to determine ID in human blood exposed to internal or external
ionizing radiation treatment both directly and retrospectively. OSL technique
was used to measure the total dose from the blood sample. OSL counts from the
waste blood of the patient injected with a radiopharmaceutical for diagnostic
or treatment purposes and from a blood sample having a laboratory-injected
radiation dose were both used for measurements. The decay and dose-response
curves (DRC) were plotted for different doses. The doses received by different
blood aliquots have been determined by interpolating the natural luminescence
counts to DRC. In addition, OSL counts from a healthy blood sample exposed to
an external radiation source were measured. The blood aliquots were given
different 0-200Gy beta doses and their decay and dose-response curves were
plotted. The internal dose received by the blood aliquots injected with
radioisotope was determined by interpolating the natural luminescence counts to
DRC. The internal dose values were found as 0.46Gy and 0.51Gy for different
dose range. The blood aliquots were exposed to different external laboratory
doses. The internal dose values corresponding to 10Gy laboratory dose from the
aliquots exposed to external radiation were found as 10.94Gy for Disc3 and
~10.79Gy for Disc1.This study shows that the dose received by a person can be
measured directly, simply and retrospectively by using only a very small amount
of blood sample. The results will have important ramifications for the medicine
and healthcare fields in particular.

Medical Physics