TITLE:
Application of Dual-Energy CT Non-Linear Fusion Technology in Improving CTA Image Quality of Renal Cancer
AUTHORS:
Shuiqing Zhuo, Xiaoling Chen, Jingping Yu, Sihui Zeng, Lizhi Liu
KEYWORDS:
Dual-Source CT, Non-Linear Fusion Technology, Renal Cancer, Computed Tomographic Angiography, Image Quality
JOURNAL NAME:
Open Journal of Medical Imaging,
Vol.8 No.3,
September
25,
2018
ABSTRACT: Objective: To
explore the significance of dual-energy CT non-linear fusion technique in
improving the quality of CTA image of renal cancer. Methods: The CTA
images of 100 patients who had been confirmed by pathology as renal cancer were
collected and were randomly divided into experimental group and control group with
50 cases respectively. The two
groups of patients were treated with iodine concentration of 300 mg/ml and 350 mg/ml
non-ionic contrast agent, with a dosage of 1.5 ml/kg and an injection rate of 4 ml/s.
The contrast agent intelligently tracking method was adopted bolus. The control
group used the conventional CTA scanning, with a reference tube voltage/tube current
of 100 kv/ref150 mas.
The experimental group adopted the double energy scanning, with ball tube A and ball tube B. The reference tube voltage/tube current
was 100 kv/ref250 mas and
sn150 kv/ref125 mas
respectively. The images of the experimental group were non-linear fused to obtain the Mono+ 55 kev
single-energy images. The CT value, SNR contrast ratio of the abdominal aorta,
renal artery and tumor tissue of the experimental group images and the 100 KV images and the Mono+ 55 kev
images of the control group were compared. The objective
evaluation and subjective evaluation of the image quality of the three groups
of images was performed. Results: The
results showed that the 100 kV
images of the experimental group were statistically different from those of the
control group (P05) in CT value, SNR and CNR (P 0.05). And there was no statistically significant
difference between the non-linear fusion single-energy Mono+ 55 kev
images and the control group images in CT value, SNR and CNR (P > 0.05).
The subjective evaluation of image quality showed that there was no significant
difference between Mono+ 55 kev images and control group images, and the quality
of Mono+ 55 kev
images was higher than that of experimental group 100 kV images. Conclusion: The dual-energy CT
non-linear fusion technique can improve the quality of CTA image in patients
with renal cancer, and it is possible to obtain high quality CTA images with
low iodine concentration contrast agent.