Objective:

To investigate the image quality and radiation dose of adaptive iterative dose reduction 3D (AIDR 3D) iterative reconstruction technique and low dose contrast medium in enhanced CT scans of focal liver lesions.

Methods

: A total of 60 patients underwent hepatic enhanced CT scans were randomly divided into two groups. Group A adopted filtered back projection (FBP) reconstruction and conventional dose contrast medium (1.5 mL/kg)

and group B adopted AIDR 3

D reconstruction and low dose contrast medium (1.0 mL/kg). Qualitative ranking of noise

image quality and whether meet the requirements of diagnosis were graded [a scale of 1-5 (1 worse

5 (best)

]

. The radiation dose

imaging noise

signal-to-noise ratio (SNR)

contrast-tonoise ratio (CNR) were quantitatively measured.

Results:

The effective dose (ED) in group B decreased 32.1% compared to group A. In group B

the score of image quality was similar to group A (

P

0.05)

the image noise was lower

CNR and SNR were higher compared with group A (

P

0.05).

Conclusion:

Low dose contrast medium combined with AIDR 3D reconstruction technology can be used for CT scans of the hepatic lesions.