Objective: Multiphase multidetector contrast-enhanced parathyroid CT (4-dimensional computed tomography [4D-CT]) is an emerging tool for evaluating patients with primary hyperparathyroidism. Our goal was to describe the initial performance of 2 inexperienced readers in interpretation of 4D-CT.
Methods: Twenty-three subjects who received 4D-CT and successful surgical exploration were studied (14 initial and 9 repeat explorations; 15 single-gland disease and 8 multigland disease) A staff neuroradiologist prospectively interpreted all studies, and a neuroradiology fellow retrospectively interpreted all studies; their results were compared with the surgical findings for each side of the neck separately.
Results: The prospective readings were 78% accurate overall, 97% accurate in the subset of single-gland disease cases, and 89% accurate in re-exploration cases. There was 91% concordance in interpretation between observers, with κ of 0.83.
Conclusions: Initial results after implementation of 4D-CT show high accuracy of interpretation for inexperienced observers, comparable to published data, and high interobserver agreement.
From the Departments of *Radiological Sciences and †Surgery, David Geffen School of Medicine, University of California, Los Angeles, CA; and ‡Imaging Department, Faculty of Medicine, University of Lisbon, Lisbon, Portugal.
Received for publication January 10, 2013; accepted February 6, 2013.
Reprints: Ali R. Sepahdari, MD, Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, 757 Westwood Plaza, Suite 1621D, Los Angeles, CA 90095 (e-mail: firstname.lastname@example.org; email@example.com).
The authors have no financial conflicts of interest to report.
This work was presented at the American Society of Head and Neck Radiology Annual Meeting; October 3–7, 2012; Miami Beach, FL.