Do metallic endoprostheses increase radiation dose associated with automatic tube-current modulation in abdominal-pelvic MDCT? A phantom and patient study

被引：18

作者：

Rizzo, SMR

Kalra, MK

Maher, MM

Blake, MA

Toth, TL

Saini, S

机构：

[1] Massachusetts Gen Hosp, Dept Radiol, Div Abdominal Imaging & Intervent, Boston, MA 02114 USA

[2] Harvard Univ, Sch Med, Boston, MA 02114 USA

[3] GE Healthcare, Waukesha, WI USA

来源：

AMERICAN JOURNAL OF ROENTGENOLOGY | 2005年 / 184卷 / 02期

关键词：

D O I：

10.2214/ajr.184.2.01840491

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

OBJECTIVE. Our objective was to assess the effect of orthopedic metallic prostheses on radiation dose associated with MDCT using z-axis automatic tube-current modulation and a fixed tube current in a phantom and patient study. CONCLUSION. Z-modulation is associated with a 34.1% increase in the mean tube current-time product and no change in the extent of streak artifacts in patients with a metallic prosthesis, compared with patients without a prosthesis. However, compared with the fixed-tube-current technique, z-modulation is associated with a 28.9% decrease in the mean tube current-time product.

引用

收藏

页码：491 / 496

页数：6

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