Radiochromic film digitizers
DOI link for Radiochromic film digitizers
Radiochromic film digitizers book
This chapter discusses the various types of radiochromic film digitizers and their advantages and limitations. It focuses on the technology used to perform an accurate radiochromic film readout and on the advantages and limitations of various scanning techniques. The chapter provides an overview of the film digitizer technologies so that appropriate equipment decisions can be made, on the basis of individual cost, speed, and precision requirements. Optical light intensity measurements are used to quantify radiochromic film response. Radiochromic film measurement accuracy is dependent on measurements reproducibility, so that the difference between intensity measurements before and after irradiation may be reliably related to radiation absorbed dose. In the early 1990s, the original devices used for radiochromic film scanning were scanning densitometers, most commonly used for electrophoresis gel and liquid sample analysis. In the context of radiochromic film dosimetry, fluorescent lamps are used in most color charge-coupled device flatbed scanners.