Page 209 - 00. Complete Version - Progress Report IPEN 2014-2016

Nuclear Science and Technology | Progress Report 209

dosimetry, in order to assess the viability of diodiagnostic images and quality assurance
building a phantom for radiotherapy with a of dosimetry in radiation therapy area. The
3D printer. The results indicate that the PLA development of simulators using 3D print-
printed plates can be considered tissue-equiv- ers and tissue-equivalent materials proved
alent and agree with the obtained using sol- to be quite feasible for use in the field of vet-
id water plates. erinary radiology. The images obtained by CT
exams showed good agreement with real ex-
Development of tissue equivalent phantoms ams with animals, thus this dog’s phantom
using 3D printer for application in quality has demonstrated to be very useful for quality
assurance in veterinary medicine control in radiodiagnostic and radiation thera-

py areas. The methodology used in this study
enabled the development of personalized ex-
ams for the verification of a better protocol on
the evaluation of absorbed doses in patients.
This work will allow the creation and devel-
opment of phantom of different shapes and
sizes with tissue-equivalent material that will
be used for application in veterinary medicine
(radiodiagnosis and radiation therapy). Parts
of the printed dog phantom are presented in
Figure 10, 11.

Metrology in Diagnostic Radiology

During the period of 2014-2016, a new calibra-
Figure 10 - Printed parts: (a)Brain; (b) Skull – lateral view;
(c) Dog head – external view; (d) Skull – frontal view. tion methodology in terms of absorbed dose
to water for parallel plate ionization chambers
3D printing is a revolutionary technology that to be used in low energy X rays beams (10kV
allows us to change the way we consume, cre- to 100kV) was established. In order to estab-
ate and even live in the world. Today(,) it is pos- lish this calibration methodology, two ioniza-
sible to print 3D anatomical models based on tion chambers PTW models 23344 were used.
images of computed tomography (CT), Magnet- Both chambers were characterized and tested
ic Resonance Imaging (MRI). This work aims qualitatively according to recommendations
to use a 3D printer to build a dog phantom of international standards. The characteriza-
named “canis morphic”, a veterinary phan- tion tests performed were: measuring effec-
tom that can be used in quality control of ra- tive minimum dose rate measurements, the

Figure 11- Printed parts: (a) cervical spine; (b) lumbar spine.