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Detection of paranasal sinus opacification with digital tomosynthesis radiography: a clinical pilot study
Haruhiko Machida1, Toshiyuki Yuhara, Eiko Ueno
1Department of Radiology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan. machira@dnh.twmu.ac.jp
Objective:
We investigated the diagnostic accuracy of digital tomosynthesis (DT) radiography for detecting sinus opacification.
Methods:
For 31 adult patients with signs suggestive of sinusitis who underwent both sinus multi-detector-row computed tomography and DT, 2 readers independently assessed opacification in the maxillary, ethmoid, frontal, and sphenoid sinuses by DT and in consensus determined the presence of opacification in each sinus by multi-detector-row computed tomography as a reference. We assessed the diagnostic accuracy of DT and interreader agreement with DT using Cohen κ statistics.
Results:
For the maxillary, ethmoid, frontal, and sphenoid sinuses, opacification was identified in 81.7%, 75.9%, 59.3%, and 40.7%; the sensitivity/specificity for detecting opacification by DT were 93.9/72.7%, 79.5/71.4%, 93.8/72.7%, and 90.9/75.0% for reader 1 and 95.9/100.0%, 95.5/92.9%, 100.0/81.8%, and 81.8/75.0% for reader 2; the interreader agreement was 0.79, 0.42, 0.67, and 0.63, respectively.
Conclusions:
Digital tomosynthesis allows relatively accurate detection of sinus opacification with substantial interreader agreement for all the sinuses except the ethmoid sinuses.
