Feasibility of low radiation dose in craniocervical artery CT angiography with automatic tube current modulation / 中国普通外科杂志
Chinese Journal of General Surgery
;
(12)2001.
Artigo
em Chinês
| WPRIM
| ID: wpr-534465
ABSTRACT
Objective To evaluate the feasibility of automatic tube current modulation(ATCM) in craniocervical artery CT angiography with 256-slice CT,while maintaining the image quality.Methods Sixty patients undergoing craniocervical artery CTA were enrolled into this study,and were divided into conventional tube current group(250 mAs,group A,n=30) and low tube current group(ATCM,group B,n=30).The signal-to-noise ratio(SNR),contrast-to noise ratio(CNR),volume CT dose index(CTDIvol) and effective dose(ED) were evaluated respectively.Results The mean image SNR was(37.47?9.39) and(36.85?7.96) for group A and group B respectively,and was not significantly different(P=0.79).The mean image CNR was(32.13?9.06) and(31.86?7.66) for group A and group B respectively,and was not significantly different(P=0.90).The CT volume dose index(CTDI) was 16.5 mGy and 410.55?0.94mGy for group A and group B respectively,and was significantly different(P
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Idioma:
Chinês
Revista:
Chinese Journal of General Surgery
Ano de publicação:
2001
Tipo de documento:
Artigo
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