S. Kheddache et al., DIGITAL CHEST RADIOGRAPHY - OPTIMIZING IMAGE-PROCESSING PARAMETERS FOR THE VISIBILITY OF CHEST LESIONS AND ANATOMY, European journal of radiology, 22(3), 1996, pp. 241-245
The effect of varying the degree of contrast and edge enhancement upon
the visibility of chest lesions and anatomy was evaluated in a digita
l image intensifier system for chest radiography. Visual grading analy
sis was used as method for the evaluation. Conventional radiographs se
rved as reference images. Ten observers graded the visibility of four
regions of interest: (1) fine linear structures, (2) mediastinal anato
my, (3) rounded opacities, (4) vessels, and also graded the overall qu
ality of 17 chest images. The images had been subjected to three grade
s of image processing: one basic, one intermediate, and one extreme. I
n all, 2730 observations were made. The basic image processing was the
best for the visibility of regions 2, 3, and 4 and for the overall qu
ality. The intermediate image processing was best for the fine linear
structures. The extreme image processing rated lowest for all regions
and especially for the overall quality.