A team of researchers has successfully developed 3D printed multi-hole collimators for X-ray imaging systems, offering a cost-effective alternative to traditional pinhole apertures. This development has the potential to enhance the sensitivity and position resolution of X-ray fluorescence (XRF) spectrometers, paving the way for more accurate and detailed analyses.
The study, published in Spectrochimica Acta Part B: Atomic Spectroscopy, explored the performance of multi-hole collimators with varying geometries and material compositions in a full-field XRF spectrometer based on the 2D-THCOBRA gas detector (a special micropattern gaseous detector [MPGD] design). The researchers evaluated the relative sensitivity and position resolution of different setups, comparing them to pinhole-based configurations (1).
Their findings revealed that the use of smaller pinholes, while limiting system sensitivity, provides superior position resolution. Conversely, collimators with large holes and small septa yielded higher sensitivity but compromised position resolution. The best position resolution, 1.10 ± 0.02 mm full width at half maximum (FWHM), was achieved with a 0.3 mm diameter pinhole aperture, which also exhibited the lowest relative sensitivity. The lead (Pb) collimator with 2 mm hexagonal holes presented the worst position resolution value, 3.25 ± 0.09 mm FWHM (1).
In terms of sensitivity, the low attenuation coefficient and small depth of the copper (Cu) collimator with 1 mm circular holes resulted in the highest sensitivity–50 times greater than the value achieved with the smaller pinhole aperture.
These findings underscore the critical trade-off between sensitivity and position resolution in XRF imaging, emphasizing the importance of tailoring the optical component to the specific application. While pinhole apertures allow magnification for enhanced detail, they may compromise sensitivity. Multi-pinhole collimators, as used in SPECT imaging of small animals, offer a balance between sensitivity and position resolution.
The researchers highlight the potential of 3D printed collimators as a cost-effective and versatile solution for energy dispersive X-ray fluorescence (EDXRF) system applications. 3D printing enables the exploration of diverse geometries and designs, paving the way for further advancements in XRF imaging technology.
This research holds significant implications for various fields, including environmental monitoring, material analysis, and biomedical imaging. The development of 3D printed multi-hole collimators promises to enable more accurate, sensitive, and versatile analyses.
This article was written with the help of artificial intelligence and has been edited to ensure accuracy and clarity. You can read more about our policy for using AI here.
Reference
Carvalho, P. M. S.; Leite, F. D.; Tavares, G.; Correia, P. M. M.; Oliveira, J. M. M.; Veloso, J. F. C. A.; Silva, A. L. M. 3D Printed Imaging Apertures for MicroPattern Gas Detector Based Full Field of View X-Ray Fluorescence Spectrometers. Spectrochim. Acta Part B: Atomic Spectrosc. 2023, 210, 106806. DOI: 10.1016/j.sab.2023.106806.
Analyzing Oxygen Vacancy Using X-Ray Photoelectron Spectroscopy
November 26th 2024A new study published in the Journal of the European Ceramic Society introduces three XPS methodologies for accurately quantifying oxygen vacancies in metal oxides, challenging traditional misinterpretations and advancing material science research.
Handheld X-Ray Technology Unveils New Forensic Tool
September 16th 2024A recent study by researchers at the University of Porto demonstrates the potential of handheld X-ray fluorescence spectrometers to analyze cigarette ash, providing a new method for forensic investigation. This non-destructive technique can differentiate between various tobacco brands based on the elemental composition of their ash.
A Review of the Latest Spectroscopic Research in Agriculture Analysis
September 4th 2024Spectroscopic analytical techniques are crucial for the analysis of agricultural products. This review emphasizes the latest advancements in several key spectroscopic methods, including atomic, vibrational, molecular, electronic, and X-ray techniques. The applications of these analytical methods in detecting important quality parameters, adulteration, insects and rodent infestation, ripening, and other essential applications are discussed.
A Review of the Latest Spectroscopic Research in Food and Beverage Analysis
August 7th 2024Spectroscopic analytical techniques are crucial for the analysis of processed foods and beverages. This review article emphasizes the latest advancements in several key spectroscopic methods, including atomic, vibrational, molecular, electronic, and X-ray techniques. The applications of these analytical methods in detecting quality, contaminants, and adulteration applications are thoroughly discussed.