Development of a Method to Determine Electron Density and Effective Atomic Number of High Atomic Number Solid Materials Using Dual-Energy Computed Tomography.
J Med Phys
; 44(1): 49-56, 2019.
Article
em En
| MEDLINE
| ID: mdl-30983771
ABSTRACT
AIM:
This study aims to develop a method using dual-energy computed tomography (DECT) to determine the effective atomic number and electron density of substances. MATERIALS ANDMETHODS:
Ten chemical substances of pure analytical grade were obtained from various manufacturers. These chemicals were pelletized using a hydraulic press. These pellets were scanned using DECT. A relation was obtained for the pellet's atomic number and electron density with their CT number or Hounsfield unit (HU) values. Calibration coefficients were determined. Five new chemical pellets were scanned, and their effective atomic number and electron densities were determined using the calibration coefficients to test the efficacy of the calibration method.RESULTS:
The results obtained for effective atomic number and electron density from the HU number of DECT images were within ±5% and ±3%, respectively, of their actual values.CONCLUSIONS:
DECT can be used as an effective tool for determining the effective atomic number and electron density of high atomic number substance.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Med Phys
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Índia