P Mehnati - PhD, Department of Medical Physics, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
M Jafari Tirtash - MSc Student, Department of Medical Physics, School of Medicine Tabriz University of Medical Sciences, Tabriz, Iran
M Ghavami - MD, Department of Radiology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran

Background: Application of CT- scanning image information and radiation physical characteristics of the biomaterials are two measurable assays for presenting modified cells. Objective: This study presented that CT number (HU) and linear attenuation coefficient contain useful information which can be determined during usual CT scanning for the prediction of breast cancerous cells existence based on hemoglobin concentration.Material and Methods: This experimental study used breast phantom containing major and minor vessels with diameters of ۱۰ and ۵ mm, respectively. The major vessels are filled by water, fat, hemoglobin (Hb) as a normal and ۴× concentration of hemoglobin (۴×Hb) as a cancerous breast cells, then scanned by single slice CT (GE, Hi Speed) ۱۲۰ kVp, ۱۰۰ mA for the determination of linear attenuation coefficient (µL).Results: The CT numbers were for water (-۷ to +۷ HU), Hb (۲۲±۶ HU) and ۴×Hb (۸۰±۴ HU). The difference between Hb and ۴×Hb was significant (p <۰.۰۰۰). Minimum µL was ۰.۱۱۹۰±۰.۰۰۶۸۰ cm-۱ for fat and maximum was ۰.۱۴۴۹±۰.۰۰۷۹۴ cm-۱ for ۴×Hb. Conclusion: The study of CT number and linear attenuation coefficient of different concentration of Hb provides a possibility for early predicting of breast cancerous cells existence (۴×Hb).

Tomography, X-Ray Computed, HU Measurements, Blood, Body Fluids