Aims and objectives
Exposure to diagnostic X-rays provides certain benefits for patients.
At the same time,
it involves some risks such as the development of cancer .
To assess the level of risk of radiation exposure in X-ray diagnosis,
evaluation of the irradiated dose is essential.
One useful method to evaluate the dose precisely is to measure the irradiated dose directly by wearing a dosimeter during diagnosis.
we have studied the applicability of the nanoDot,
a small type optically stimulated luminescence (OSL) dosimeter,
for dosimetry in the...
Methods and materials
The calibration factors were evaluated by the Monte Carlo simulation code,
shown in Figure 2, was irradiated by 1.0×107 particles of parallel X-ray beam.
Regarding the information of the nanoDot dimensions,
we referred to the research of Lehmann et al.
The composition of Al2O3 was also determined by a previous study .Table1shows the irradiation condition used in this study.
The energy spectra of X-rays were calculated by the Birch-Marshall formula  with the information of tube voltage and filters.
The energy spectrum of diagnostic X-rays and monochromatic X-rays is shown in Figure 3.
The effective energy of each X-ray spectrum is shown in Table 1.
The energy spectra of diagnostic X-rays were broad.
The maximum energy of X-rays corresponds to the tube voltage,
but the minimum energy hardly changes.
when the tube voltage changed from 40 to 140 kV,
the effective energy of the diagnostic X-ray varied between 25 and 44 keV.
On the other hand,
the energy spectra of monochromatic X-rays were...
We have studied the reliability of the dose evaluation when using nanoDot OSL dosimeters during X-ray diagnosis.
Since the response of the nanoDot has energy dependence in the energy range of diagnostic X-rays,
calibration of the reader with respect to the nanoDot response irradiated to a certain diagnostic X-ray energy range should be performed.
In this study,
we evaluated the nanoDot calibration factors due to different X-ray qualities,
we compared the nanoDot calibration factors for 40 – 140 kV X-rays for radiography,
Gonzalez and S.
Risk of cancer from diagnostic X-rays: estimates for the UK and 14 other countries,
Procedure to measure angular dependences of personal dosimeter by means of diagnostic X-ray equipment.
Medical Imaging and Information Sciences,
Energy dependence measurement of small-type optically stimulated luminescence (OSL) dosimeter by means of characteristic X-rays induced with general diagnostic X-ray equipment.
Radiological Physics and Technology 9(1),