Application of automatic tube current modulation combined with iterative reconstruction in CT scanning of neck
10.3760/cma.j.issn.0254-5098.2017.11.015
- VernacularTitle:自动管电流联合迭代算法在颈部CT扫描中的应用研究
- Author:
Shibei HU
1
;
Changjiu HE
;
Haomiao QING
;
Fang LIU
;
Hailie LI
;
Qian XIA
;
Deshan LI
;
Peng ZHOU
Author Information
1. 四川省肿瘤医院·研究所 四川省癌症防治中心 电子科技大学医学院
- Keywords:
Neck;
Radiation dosage;
Iterative reconstruction;
ATCM technique
- From:
Chinese Journal of Radiological Medicine and Protection
2017;37(11):875-879
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore application of automatic tube current modulation combined with iterative reconstruction in CT scanning ( non-enhanced and enhanced) of neck. Methods A total of 80 patients with CT scanning of neck were randomly divided into test group(n=40, automatic tube current modulation, iterative reconstruction ) and control group ( n = 40, 200 mAs, filtered-back-projection reconstruction ) . Subjective scores and objective evaluation of two groups were evaluated. Evaluation included image noise ( SD ) of thyroid gland, trapezius muscle, sternocleidomastoid muscle, submandibular gland, lateral pterygoid muscle and brain tissue. Effective dose ( E ) was compared. Results The E of non-enhanced and enhanced scanning in test group was lower than that of control group with the statistically significant difference(t = -2. 451, -2. 451, P <0. 05). The subjective scores of non-enhanced and enhanced scanning in test group were higher than those of control group with the statistically significant difference (Z = - 1.969, - 2.056, P < 0.05), while SD of thyroid gland, trapezius muscle, sternocleidomastoid muscle, submandibular gland in test group were lower than that of control group with the statistically significant difference ( t =2. 400,2. 516,2. 120,2. 411,4. 134,4. 674, 2. 711,2. 892, P<0. 05). There were no significant differences in SD of lateral pterygoid muscle, brain tissue of non-enhanced and enhanced scanning between two groups (P>0. 05). Conclusions Automatic tube current modulation combined with iterative reconstruction in CT scanning of neck could improve image quality, and reduce effectively radiation dose.
