Radiographic alterations of the frontal sinus morphology according to variations of the vertical angle in posteroanterior radiographs of the skull
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Data
2014-06
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Resumo
The frontal sinuses play a highly relevant role in comparative human identification
processes. Since forensic radiology is a branch in the forensic sciences, adequate radiological analysis of the
frontal sinuses is essential for comparative human identifications. The current study investigates
radiographic morphological changes in the frontal sinuses according to vertical angle distortions in
posteroanterior (PA) radiographs. A standard PA radiograph of the skull of an adult was obtained. Eight
addition PA radiographs were taken at different vertical angles. Frontal sinuses were analyzed qualitatively
and quantitatively according to Ribeiro´s (2000) technique. Both qualitative and quantitative analyses
revealed significant image distortions. Further, overlapping anatomical structures were reported when PA
radiographs were analyzed in negative angulation distortions (from -10° to -40°). Positive and negative
angular distortions up to 20º slightly affected the qualitative morphological analysis. However, 10° positive
and negative distortions provided a significant interference in quantitative analysis and impaired the
measuring process. Most forensic techniques for the analysis of frontal sinuses comprise measurements of
morphological distances. Distortions of approximately 10° or over in vertical angulation of cranial PA
radiographs should be avoided so that more accurate comparative human identifications could be achieved.
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Frontal sinus, Human identification, Radiographic technique, Forensic anthropology, Radiographic technique, Forensic anthropology, Seios frontais, Identificação humana, Técnica radiográfica, Antropologia forense
Citação
SILVA, Rhonan Ferreira et al. Radiographic alterations of the frontal sinus morphology according to variations of the vertical angle in posteroanterior radiographs of the skull . Acta Scientiarum. Health Sciences, Maringá, v. 36, n.1, p. 113-117, Jan./June 2014.