|
KMID : 0357520100330020097
|
|
Journal of Radiological Science and Technology
2010 Volume.33 No. 2 p.97 ~ p.107
|
|
|
Analysis of Image Processing Characteristics in Computed Radiography System by Virtual Digital Test Pattern Method
|
|
Choi In-seok
Kim Jung-Min
Oh Hye-Kyong
Kim You-Hyun
Lee Ki-Sung
Jeong Hea-Won
Choi Seok-Yoon
|
|
|
Abstract
|
|
|
|
The objectives of this study is to figure out the unknown image processing methods of commercial CR system. We have implemented the processing curve of each Look up table(LUT) in REGIUS 150 CR system by using virtual digital test pattern method. The characteristic of Dry Imager was measured also. First of all, we have generated the virtual digital test pattern file with binary file editor. This file was used as an input data of CR system (REGIUS 150 CR system, KONICA MINOLTA). The DICOM files which were automatically generated output files by the CR system, were used to figure out the processing curves of each LUT modes (THX, ST, STM, LUM, BONE, LIN). The gradation curves of Dry Imager were also measured to figure out the characteristics of hard copy image. According to the results of each parameters, we identified the characteristics of image processing parameter in CR system. The processing curves which were measured by this proposed method showed the characteristics of CR system. And we found the linearity of Dry Imager in the middle area of processing curves. With these results, we found that the relationships between the curves and each parameters. The G value is related to the slope and the S value is related to the shift in x-axis of processing curves. In conclusion, the image processing method of the each commercial CR systems are different, and they are concealed. This proposed method which uses virtual digital test pattern can measure the characteristics of parameters for the image processing patterns in the CR system. We expect that the proposed method is useful to analogize the image processing means not only for this CR system, but also for the other commercial CR systems.
|
|
|
KEYWORD
|
|
|
Image processing, Computed radiography, Gradation processing, Gradation curve, Virtual digital test pattern
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|