title: Radiological technologists' performance for the detection of malignant microcalcifications in digital mammograms without and with a computer-aided detection system.
abstract: The aim of this study was to investigate the diagnostic performance of radiological technologists (RTs) in the detection of malignant microcalcifications and to evaluate how much computer-aided detection (CADe) improved their performances compared with those by expert breast radiologists (BRs). Six board-certified breast RTs and four board-certified BRs participated in a free-response receiver operating characteristic observer study. The dataset consisted of 75 cases (25 malignant, 25 benign, and 25 normal cases) of digital mammograms, selected from the digital database for screening mammography provided by the University of South Florida. Average figure of merit (FOM) of the RTs' performances was statistically analyzed using jack-knife free-response receiver operating characteristic and compared with that of expert BRs. The detection performance of RTs was significantly improved by using CADe; average sensitivity was increased from 46.7% to 56.7%, with a decrease in the average number of false positives per case from 0.19 to 0.13. Detection accuracy of an average FOM was improved from 0.680 to 0.816 ([Formula: see text]) and the difference in FOMs between RTs and radiologists failed to reach statistical significance. RTs' performances for the identification of malignant microcalcifications on digital mammography were sufficiently high and comparable to those of radiologists by using CADe.
authors.affiliation: Kanazawa University , College of Medical, Pharmaceutical, and Health Sciences, School of Health Sciences, 5-11-80 Kodatsuno, Kanazawa 920-0942, Japan.
authors.forename: Rie
authors.initials: R
authors.lastname: Tanaka
authors.affiliation: Ishikawa Prefectural Hospital , Department of Radiology, 2-1 Kuratsuki-Higashi, Kanazawa 920-8530, Japan.
authors.forename: Miho
authors.initials: M
authors.lastname: Takamori
authors.affiliation: Kumamoto University , Faculty of Life Sciences, 4-24-1 Kuhonji, Kumamoto 862-0976, Japan.
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Uchiyama
authors.affiliation: Kumamoto University , Faculty of Life Sciences, 4-24-1 Kuhonji, Kumamoto 862-0976, Japan.
authors.forename: Junji
authors.initials: J
authors.lastname: Shiraishi
keywords: computer-aided detection; jack-knife free-response receiver operating characteristic analysis; malignant microcalcifications; mammogram; radiological technologist