X-ray attenuation measurements of Bi2S3@BSATriptorelin NPs versus Visipaque

The X-ray attenuation intensity of Bi2S3 @ BSA Triptorelin NPs was compared with CT contrast agent based on iodine Visipaque (320 mg/ml), (544031, GE Healthcare, Ireland). Different concentrations (500-3000 µg/ml) of the mentioned materials were prepared in the 200 µl microtubes and placed in a polymethylmethacrylate (PMMA) phantom (Iran). CT imaging was performed through clinical CT modality (Neusoft) with the parameters of: 1. tube voltages: 90, 120, and 140 kVp, 2. tube current: 250 mA, 3. exposure time: 1000 milliseconds, 5. thickness cutting: 1 mm, 6. Scanning Field of View (SFOV): 250×250 mm, 7. pitch: 1. The attenuation intensity was done in the region of interest (ROI) of the acquired images.