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Three-dimensional brain phantom containing bone and grey matter structures with a realistic head contour
Hidehiro Iida1, Yuki Hori, Kenji Ishida
1Department of Investigative Radiology, National Cerebral and Cardiovascular Center Research Institute, Suita City, Osaka, Japan. iida@ri.ncvc.go.jp
Annals of Nuclear Medicine
|September 27, 2012
Summary
A novel 3D brain phantom accurately simulates PET/SPECT images for evaluating cerebral blood flow. This physical model aids in assessing the performance of nuclear imaging reconstruction software.
Area of Science:
- Medical Imaging
- Nuclear Medicine
- Biomedical Engineering
Background:
- A physical 3D phantom simulating PET/SPECT images of cerebral blood flow has been developed.
- The phantom features a realistic head contour and distinct compartments for grey matter, skull, and trachea.
Purpose of the Study:
- To evaluate the feasibility of using the developed 3D brain phantom for assessing Positron Emission Tomography (PET) and Single-Photon Emission Computed Tomography (SPECT) images.
- To validate the accuracy and reproducibility of the phantom for nuclear imaging applications.
Main Methods:
- Constructed using a transparent, hydrophobic photo-curable polymer via laser modeling.
- Designed with compartments for radioactive solution (grey matter), bone-equivalent solution (skull), and air (trachea).
- Validated using X-ray CT, SPECT, and PET, confirming accuracy and reproducibility.
Main Results:
- Phantom dimensions: 563 ± 1 mL (grey matter) and 306 ± 2 mL (bone).
- Apparent attenuation coefficient for Tc-99m (0.168 ± 0.006 cm⁻¹) consistent with human values.
- Successful removal of air bubbles and good adaptation to PET/SPECT devices.
Conclusions:
- The 3D brain phantom is suitable for evaluating SPECT/PET reconstruction software.
- This phantom serves as a valuable tool for quality assurance in nuclear imaging.
- Further research can utilize this phantom for advanced imaging studies.
