Image salvage in panoramic radiography using histogram optimization.
Optical density and contrast recovery from poor quality panoramic radiographs was studied using the histogram modification technique. A series of experimental images of varying density and contrast were obtained by exposing a phantom in 4 kV steps between 50 and 94 kV. A standard of good image quality was selected by 10 observers grading the radiographs. Images were processed using the histogram specification technique and re-evaluated. All the processed images were found to be of acceptable quality. This technique was also shown to be applicable for salvaging unacceptable clinical radiographs.
Ogawa
M
M
Department of Oral Radiology, Hiroshima University School of Dentistry.
Tanimoto
K
K
Kodera
Y
Y
Suei
Y
Y
Taguchi
A
A
Tomita
S
S
Furuki
Y
Y
Fujita
M
M
Wada
T
T
D006801:Humans; D007091:Image Processing, Computer-Assisted; D011856:Radiographic Image Enhancement / Q000379:methods*; D011862:Radiography, Panoramic / Q000379:methods*