Microdensitometer system for microradiography |
| |
Authors: | Bo Lindström Bo Philipson |
| |
Institution: | (1) Department of Medical Physics, Karolinska Institutet, Stockholm, Sweden |
| |
Abstract: | Summary A microdensitometer system for point measurements in areas down to a few square micrometers is described. The detector system is connected to an integrating digital voltmeter, constituting a very sensitive system. The digital output signals and a digital identification are registered on a recorder and on a tape punch, thus facilitating computer analysis.The precision of the equipment varied from 1.1 per cent, for low signal levels, to 0.3 percent for the highest signal levels. Stray light, the only important source of systematic errors, was found to influence the output signal level. Concerning determinations of the densities, however, a variation of the order of 1 per cent was only obtained for small areas with densities differing from that of the background. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|