Effect of anode/filter combination on the dose and image quality of a digital mammography system based on an amorphous selenium detector

被引：0
|
作者：
Baldelli, Paola [1 ]
Phelan, Niall [1 ]
Egan, Gillian [1 ]
机构：
[1] Breastcheck, Dublin, Ireland
来源：
DIGITAL MAMMOGRAPHY, PROCEEDINGS | 2008年 / 5116卷
关键词：
digital mammography; image quality; contrast-to-noise ratio;
D O I：
暂无
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
A comparison of image quality and glandular breast dose was carried out on two digital mammography systems using alpha-Se flat panel detectors. The two digital mammography systems currently available from Hologic were compared. The original system utilises Mo /Mo and Mo/Rh as target/filter combinations, while the new system uses W/Rh and W/Ag. Images of mammography phantoms with different simulated breast thickness and various glandular compositions, was calculated and the AGD needed to visualize a detail with a CNR of 5 was estimated. For each phantom thickness and target/filter combination, there is an optimum voltage which maximizes the AGD. Using the Tungsten tube system there is a dose redcution of 16% at 4cm and 5cm, and 35% for 6 cm compared with the dose needed with the Mo/Mo combination.
引用
收藏
页码：716 / 723
页数：8
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