Evaluation of a new type of high sharpness film for skull radiography.
A new type of high sharpness, high speed film was evaluated in combination with rare-earth screens for modulation transfer function, root-mean-square granularity and characteristic curve, and compared with currently available film-screen combinations. The clinical applicability of the new system was also compared on the basis of resolution and the discrimination of anatomical features on radiographs of a skull phantom. The results indicated that the new type film provided a radiograph of higher image quality while at the same time reducing patient dose by about 20% compared with the present rare-earth screen systems, or with no loss of image quality while reducing patient dose by about 50% compared with the present calcium tungstate system.
Department of Dental Radiology and Radiation Research, Faculty of Dentistry, Tokyo Medical and Dental University.
E
E
Honda
N
N
Yoshino
R
R
Chiba
T
T
Sasaki
D016477:Artifacts; D006801:Humans; D011859:Radiography; D012886:Skull / Q000000981:diagnostic imaging; D014962:X-Ray Film; D014963:X-Ray Intensifying Screens