A TIME-DELAY INTEGRATION CHARGE-COUPLED DEVICE CAMERA FOR SLOT-SCANNED DIGITAL RADIOGRAPHY

被引：52

作者：

HOLDSWORTH, DW ^{[1
]}

GERSON, RK ^{[1
]}

FENSTER, A ^{[1
]}

机构：

[1] UNIV TORONTO,DEPT MED BIOPHYS,TORONTO M4X 1K9,ONTARIO,CANADA

来源：

MEDICAL PHYSICS | 1990年 / 17卷 / 05期

关键词：

charge-coupled device; digital radiography; time-delay integration;

D O I：

10.1118/1.596578

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：

We have developed a low-noise digital camera based on a 512 x 96 element CCD operating in the time-delay integration mode. This camera has been combined with an x-ray image intensifier to record radiographic images produced by a scanning slot beam of radiation. This results in the rejection of a large fraction of scattered radiation, without a significant increase in x-ray tube heat loading or image acquisition time. Here we describe the design of our CCD camera and the results of our investigations of camera resolution, linearity, noise, and quantum efficiency. We have found that both the resolution limit (50 mm-1) and the dynamic range (2100) of this novel camera are greater than reported values for conventional video cameras. Applications of this system in digital angiography and mammography are discussed. © 1990, American Association of Physicists in Medicine. All rights reserved.

引用

页码：876 / 886

页数：11

共 50 条

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