Speaker
Description
Abstract
Nuclear medical imaging, which relies on the detection of γ rays emitted by unstable radioisotopes, plays a pivotal role in both clinical research and applications within nuclear medicine [1]. The essential task in nuclear imaging is to reconstruct a source distribution i.e. to obtain an accurate image of the radioactivity distribution. In anticipation of the increasingly widespread use of detector panels, we are therefore motivated to consider the development of a small PET scanner. In this study, the objective is to reconstruct the 2D image of the source positioned within the detector’s field of view by measuring the two gamma rays emitted in opposite directions from the source in coincidence. We coupled a GAGG(Ce) crystal with a position-sensitive photomultiplier tube (PSPMT). An experiment was performed using two such detectors with a $^{22}$Na source to measure the spatial resolution of a nearly point-like radioactive source [2]. A spatial resolution of approximately 4.7 mm was achieved in the plane of the crystal. A Geant4 simulation with six detectors arranged in a hexagonal geometry is being carried out to investigate the three-dimensional resolution.
Acknowledgment
This work is supported by the Department of Atomic Energy, Government of India (Project Identification No. RTI/4002 ).
Refrences
[1] Zaidi, H., Hasegawa, B.H. (2006). Overview of Nuclear Medical Imaging: Physics and Instrumentation. Quantitative Analysis in Nuclear Medicine Imaging. Springer, Boston, MA.
[2] Sangeeta Dhuri, Vishal Malik, R. Palit, Biswajit Das, S. K. Jadhav, B. S. Naidu, A. T. Vazhappily, S. Pal, and A. Sindhu. The $\gamma$-$\gamma$ coincidence setup using GAGG(Ce) based position sensitive scintillators for $\gamma$-ray imaging applications, 69th DAE BRNS symposium on Nuclear Physics (2024)
| Position | Research Scholar |
|---|---|
| Affiliation | Tifr Mumbai |
| Country | India |