Objective To explore the application value of SAFIRE technology in the chest low-dose CT scanning. Methods The radiographic data of 30 patients, detected twice by the chest CT scanning in our hospital during Jun 2014 and Dec 2014, were randomly selected, and technology of traditional FBP reconstruction and sinogram-affirmed iterative reconstruction (SAFIRE) were used successively in the scanning, with strength of grade 3. The CT value, noise (SD), signal-to-noise ratio (SNR) and effective dose (ED) of two images was recorded and compared in each patient. Results The CT values of images in these patients with FBP or SAFIRE technology in the upper part (pectoralis major), middle part (ascending aortic root) and lower part (paravertebral soft tissue) of lung were (51.19±6.22) HU vs (53.91±12.89) HU, (42.87±7.37) HU vs (42.55±8.20) HU, (45.84±8.37) HU vs (44.43±15.47) HU, respectively, and the noise SDs between patients with FBP or SAFIRE technology were (8.65±2.07) HU vs (18.41±18.00) HU, (9.19±1.69) HU vs (19.20±15.71) HU, (13.27±3.05) HU vs (29.24±30.09) HU, and differences between them were all of no significance (all P>0.05). But the SNRs between patients with FBP or SAFIRE technology were (6.31±1.87) vs (4.39±2.20), (4.82±1.06) vs (3.03±1.33), (3.73±1.36) vs (2.45±1.43), together with the ED values between them (2.84±0.88) mSv vs (1.27±0.64) mSv, all with statistically significant differences (all P<0.05). There was no difference between patients with FBP or SAFIRE technology in the subjective scoring of image quality. Conclusion Compared with the technology of traditional FBP reconstruction, the SAFIRE technology could ensure the desired image quality for diagnosis, and at the same time, effectively reduce CT radiation dose and give safety to patients. |