Study On Uniformity of Pure Iodine with Concentration 370 Mg/Ml in Dual Energy Computed Tomography Images

Muhammad F. Fauzan; Choriul Anam; Heri Sutanto; Ilham Alkian; Adiwasono M. B. Setiawan

doi:10.32628/IJSRST24116178

Authors

Muhammad F. Fauzan Department of Physics, Faculty of Science and Mathematics, Diponegoro University, Tembalang, Semarang 50275, Central Java, Indonesia Author
Choriul Anam Department of Physics, Faculty of Science and Mathematics, Diponegoro University, Tembalang, Semarang 50275, Central Java, Indonesia Author
Heri Sutanto Department of Physics, Faculty of Science and Mathematics, Diponegoro University, Tembalang, Semarang 50275, Central Java, Indonesia Author
Ilham Alkian Smart Materials Research Center (SMARC), Diponegoro University, Tembalang, Semarang 50275, Central Java, Indonesia Author
Adiwasono M. B. Setiawan Radiodiagnostic imaging and Interventional Radiology (RIR), Santo Borromeus Hospital Bandung, West Java, Indonesia Author

DOI:

https://doi.org/10.32628/IJSRST24116178

Keywords:

dual energy CT, iodine material density, uniformity

Abstract

Objective: To analyze a uniformity of pure iodine concentration (with concentration of 370 mg/ml) in dual energy computed tomography (DECT) images. Method: To perform this study, an in-house phantom was used. The phantom has a diameter of 16 cm, a length of 5 cm, and has 5 holes with a diameter of 1.5 cm. Iodine with concentration of 370 mg/ml were positioned at each hole of the phantom. The phantom was scanned using the GE Revolution Apex (ultrafast kV switching type DECT) with voltages of 80/140 kV. The image was reconstructed and displayed as the Iodine material density (MD) map using the Gamestrone Spectral Imaging (GSI Viewer) application. To obtain the uniformity, regions of interest (ROIs) were located at the center and edges at 3, 6, 9, and 12 o'clock. Results: The measured concentration is lower than set concentration of 370 mg/ml. It was found that average measured iodine concentrations are 277.8, 311.2, 287.5, 312.6, and 303.1 mg/ml at the center and at 3, 6, 9, and 12 o’clock, respectively. The maximum value of the measured iodine concentration is at 9 o’clock, and the minimum value of the measured iodine concentration is at center position. Hence, the iodine uniformity was less than 37 mg/ml. Conclusion: Measurement of iodine uniformity on DECT images was carried out. Uniformity is below 10% of the iodine concentration value.

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