Direct digital extraoral radiography of the head and neck with a solid-state linear x-ray detector.
A narrow fan beam of x-rays intercepted by a linear array detector was used to acquire transmission data for a radiographic phantom moved across the beam. The digital data were displayed as images representing a variety of extraoral views of the head and neck. Projections investigated include the straight lateral view, two frontal projections, and a half-axial projection. The digital images appear to provide adequate contrast and resolution for common diagnostic tasks. In addition, the use of a scanning linear detector reduces the amount of scatter, which increases contrast relative to images made with an area detector. The system appears to provide a versatile and convenient means for the acquisition of extraoral views relevant to dental practice while it eliminates the logistical difficulties and errors associated with film processing.
McDavid
W D
WD
Department of Dental Diagnostic Science, University of Texas Health Science Center, San Antonio.
Dove
S B
SB
Welander
U
U
Tronje
G
G
D000703:Analog-Digital Conversion; D002508:Cephalometry / Q000295:instrumentation / Q000379:methods*; D005240:Feasibility Studies; D006801:Humans; D008961:Models, Structural; D009333:Neck / Q000000981:diagnostic imaging*; D010865:Pilot Projects; D011856:Radiographic Image Enhancement / Q000379:methods*; D011861:Radiography, Dental / Q000295:instrumentation / Q000379:methods*; D012542:Scattering, Radiation; D012886:Skull / Q000000981:diagnostic imaging*