A dual sensitivity screen system for TMJ image enhancement in cephalometric radiography: sensitometric evaluation.
OBJECTIVE
An in vitro evaluation of the image quality of the TMJ OrthoCeph Slimline Cassette System (TOSCS).


METHODS
The density response, resolution and clarity of the system were evaluated by use of the characteristic curve, modulation transfer function and root mean square quantum mottle. Relative sharpness was evaluated qualitatively by five observers.


RESULTS
Increased density with Trimax 12 gave almost the same contrast as that with Trimax 8 in the diagnostic range, whereas MTF and RMS for Trimax 12 were inferior.


CONCLUSIONS
The dual-sensitivity screen system should lead to improved radiographic contrast of the TMJ region in cephalometric radiography. The reduction in sharpness is probably clinically insignificant.
Wakoh
M
M
Division of Radiology and Imaging Sciences, School of Dentistry, University of Louisville, KY, USA.
Farman
A G
AG
Nishikawa
K
K
Kuroyanagi
K
K
Scarfe
W C
WC
Braun
S
S
D015502:Absorptiometry, Photon; D002508:Cephalometry / Q000295:instrumentation*; D006801:Humans; D008674:Metals, Rare Earth; D019047:Phantoms, Imaging; D011856:Radiographic Image Enhancement / Q000295:instrumentation; D011861:Radiography, Dental / Q000295:instrumentation*; D015203:Reproducibility of Results; D013704:Temporomandibular Joint / Q000000981:diagnostic imaging*; D014963:X-Ray Intensifying Screens
D008674:Metals, Rare Earth