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Stereoscopic portable hybrid gamma imaging for source depth estimation
S L Bugby1, J E Lees2, W K McKnight2
1Centre for Sensing and Imaging Science, Department of Physics, Loughborough University, Loughborough, E11 3TU, United Kingdom.
Physics in Medicine and Biology
|January 7, 2021
Summary
New stereoscopic gamma imaging offers precise depth measurements for radioisotope sources. This advancement enhances surgical localisation, particularly for procedures like sentinel lymph node biopsy.
Area of Science:
- Medical Imaging
- Nuclear Medicine
- Surgical Technology
Background:
- Stereoscopic gamma imaging is becoming feasible with hand-held units.
- Accurate localisation of radioisotope sources is crucial for minimally invasive surgery.
Purpose of the Study:
- To develop an analytical model for stereoscopic pinhole gamma imaging.
- To evaluate the performance of this imaging technique for depth measurement.
- To integrate gamma imaging with optical imaging for enhanced surgical localisation.
Main Methods:
- Derivation of an analytical model for stereoscopic pinhole imaging.
- Monte Carlo simulations and benchtop studies for performance evaluation.
- Combination of stereoscopic gamma imaging with stereoscopic optical imaging.
Main Results:
- The analytical model predicts performance for various camera configurations.
- Benchtop studies showed distance measurements with <5 mm deviation for distances of 50-250 mm.
- The hybrid technique enables depth calculation of subsurface radioisotope sources without external tracking.
Conclusions:
- Stereoscopic gamma imaging is a viable technology for hand-held units.
- The developed model accurately predicts imaging performance.
- The hybrid technique offers a novel solution for improved surgical localisation in procedures like sentinel lymph node biopsy.
