Highspeed serial scanning
Springer Online Journal Archives 1860-2000
Abstract This study was conducted to investigate the usefulness of subtraction CT for diagnosing lesions of the maxillary sinus, and to compare the enhancement patterns of maxillary cancer and unilateral chronic maxillary sinusitis. Twenty-two cases of unilateral chronic maxillary sinusitis and four cases of maxillary cancer were reviewed. The subtraction images were classified according to the following three patterns: no enhancement, linear enhancement, and heterogeneous enhancement. In unilateral chronic maxillary sinusitis, no enhancement was found in 41% of the cases, linear enhancement in 50%, and heterogeneous enhancement in 9%. Conversely, while all cases of maxillary cancer showed a heterogeneous enhancement pattern of the soft tissue lesion, there were no cases which also showed areas of no enhancement or of linear enhancement. In conclusion, it was suggested that this enhancement pattern might be used supplementary to differentiate maxillary cancer from unilateral chronic maxillary sinusitis.
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