OPDIMA:: Large-area CCD-based X-ray image sensor for spot imaging and biopsy control in mammography

被引：15

作者：

Thunberg, S ^{[1
]}

Sklebitz, H ^{[1
]}

Ekdahl, B ^{[1
]}

Bätz, L ^{[1
]}

Lundin, A ^{[1
]}

Möller, H ^{[1
]}

Fleischmann, F ^{[1
]}

Kreider, G ^{[1
]}

Weidner, T ^{[1
]}

机构：

[1] Siemens Elema AB, S-17195 Solna, Sweden

来源：

MEDICAL IMAGING 1999: PHYSICS OF MEDICAL IMAGING, PTS 1 AND 2 | 1999年 / 3659卷

关键词：

digital mammography; spot imaging; image quality; CCD; MTF; DQE; NPS;

D O I：

10.1117/12.349488

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

A large CCD detector has been developed for digital spot imaging and stereotactic biopsy control in mammography. The detector consists of a 100 mu m thick CsI (T1) scintillator, a fiber optic plate and an active CCD area of 49mm x 85mm. The pixel size is 12 mu m with a matrix of 4096 x 7168 pixels, resulting in nearly 30 million pixels. The detector and its electronics have been designed to operate at room temperature, without the need for additional cooling. The CCD detector and electronics are integrated into a "cassette", with the same dimensions as an ordinary film/screen cassette, so it can fit into the ordinary object tables of mammography units. For practical purposes the CCD camera is used in two different modes, 2x2-binning or 4x4-binning, which corresponds to 24 mu m and 48 mu m in effective pixel size. Measured resolution are 20 and 11 1p/mm for the 24 mu m and 48 mu m effective pixel sizes respectively, and the DQE @ 1 1p/mm was 0.57 and 0.55.

引用

页码：150 / 158

页数：9

共 7 条

[1]

De Paredes ES, 1998, COMP IMAG VIS, V13, P47

[2] DQE(F) OF 4 GENERATIONS OF COMPUTED RADIOGRAPHY ACQUISITION DEVICES [J].