Measurement of radiation attenuation parameters of modified defatted soy flour–soy protein isolate-based mangrove wood particleboards to be used for CT phantom production

• Published in: Radiation and environmental biophysics Vol. 59; no. 3; pp. 483 - 501
• Main Authors: Samson, D. O., Jafri, M. Z. Mat, Shukri, A., Hashim, R., Sulaiman, O., Aziz, M. Z. A., Yusof, M. F. M.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2020; Springer Nature B.V
• Subjects: Adhesives; Attenuation; Biological and Medical Physics; Biophysics; Computed tomography; Damage prevention; Density distribution; Diffraction patterns; Dosimeters; Dosimetry; Ecosystems; Effects of Radiation/Radiation Protection; Electron density; Environmental Physics; Epichlorohydrin; Flour; Glycine max; Itaconic acid; Monitoring/Environmental Analysis; Original Article; Parameter modification; Particle board; Phantoms, Imaging; Physics; Physics and Astronomy; Proteins; Radiation dosimetry; Radiation measurement; Radiotherapy; Rhizophoraceae; Sodium hydroxide; Soybean Proteins; Tomography, X-Ray Computed; Wood; X-ray diffraction; spp; X-ray CT; DSF–SPI; Electron density; Attenuation parameters; Rh. spp
• ISSN: 0301-634X; 1432-2099
• DOI: 10.1007/s00411-020-00844-z

For the first time, Rhizophora spp . ( Rh. spp . ) particleboard phantoms were developed using defatted soy flour (DSF) and soy protein isolate (SPI) modified by sodium hydroxide and itaconic acid polyamidoamine-epichlorohydrin (IA-PAE) adhesive. The microstructural characterization and X-ray diffraction patterns of the material revealed that the modified DSF and SPI adhesives became more compact and homogeneous when NaOH/IA-PAE was added, which prevented damage by moisture. It was confirmed that the composite is crystalline with (101), (002), and (004) orientations. Phantoms made of this material were scanned with X-ray computed tomography (CT) typically used for abdominal examinations with varying energies corresponding to 80, 120, and 135 kVp, to determine CT numbers, electron densities, and density distribution profiles. The radiation attenuation parameters were found to be not significantly different from those of water (XCOM) with p values > 0.05 for DSF and SPI. The DSF- and SPI-based particleboard phantoms showed CT numbers close to those of water at the three X-ray CT energies. In addition, electron density and density distribution profiles of DSF–SPI- Rh. spp. particleboard phantoms with 15 wt% IA-PAE content were even closer to those of water and other commercial phantom materials at the three X-ray CT energies. It is concluded that DSF–SPI with NaOH/IA-PAE added can be used as a potential adhesive in Rh. spp. particleboard phantoms for radiation dosimetry.