TY - JOUR
T1 - ROC analysis of detection of interval changes in interstitial lung diseases on digital chest radiographs using the temporal subtraction technique
AU - Yoshiharu, Higashida
AU - Tadamitsu, Ideguchi
AU - Toru, Muranaka
AU - Nobuyuki, Tabata
AU - Ryuichi, Miyajima
AU - Fumio, Akazawa
AU - Hirotaka, Ikeda
AU - Ken, Morimoto
AU - Ohki, Masafumi
AU - Fukai, Toyofuku
AU - Kunio, Doi
PY - 2004/1/25
Y1 - 2004/1/25
N2 - Purpose: To demonstrate the clinical usefulness of a temporal subtraction technique for the detection of interval changes in various interstitial lung diseases on digital chest radiographs. Materials and Methods: One hundred pairs of chest radiographs in 34 patients (63 with and 37 without interval changes) with various interstitial lung diseases were selected. All cases were confirmed by serial chest computed tomography (CT) and ascertained by radiologists. All chest radiographs were obtained with a computed radiography (CR) system, and temporal subtraction images were produced with an iterative image-warping technique. Four radiologists and two thoracic physicians provided confidence levels for interval changes in interstitial lung diseases with and without temporal subtraction. Their performances with and without temporal subtraction were evaluated by means of receiver operating characteristic (ROC) analysis using a sequential test. Results: The area under the ROC curve (Az) values of six observers obtained with and without temporal subtraction were 0.90 and 0.78, respectively. Results showed that the detection of interval changes in interstitial lung diseases was significantly improved by the use of temporal subtraction images compared with CR images alone (P=0.002), Furthermore, the high detection rate was achieved with temporal subtraction images regardless of the subtlety and location of interval changes. Conclusion: Temporal subtraction improved the diagnostic accuracy of radiologists in detecting interval changes in interstitial lung diseases on chest radiographs. It was also useful for cases of multiple interval changes.
AB - Purpose: To demonstrate the clinical usefulness of a temporal subtraction technique for the detection of interval changes in various interstitial lung diseases on digital chest radiographs. Materials and Methods: One hundred pairs of chest radiographs in 34 patients (63 with and 37 without interval changes) with various interstitial lung diseases were selected. All cases were confirmed by serial chest computed tomography (CT) and ascertained by radiologists. All chest radiographs were obtained with a computed radiography (CR) system, and temporal subtraction images were produced with an iterative image-warping technique. Four radiologists and two thoracic physicians provided confidence levels for interval changes in interstitial lung diseases with and without temporal subtraction. Their performances with and without temporal subtraction were evaluated by means of receiver operating characteristic (ROC) analysis using a sequential test. Results: The area under the ROC curve (Az) values of six observers obtained with and without temporal subtraction were 0.90 and 0.78, respectively. Results showed that the detection of interval changes in interstitial lung diseases was significantly improved by the use of temporal subtraction images compared with CR images alone (P=0.002), Furthermore, the high detection rate was achieved with temporal subtraction images regardless of the subtlety and location of interval changes. Conclusion: Temporal subtraction improved the diagnostic accuracy of radiologists in detecting interval changes in interstitial lung diseases on chest radiographs. It was also useful for cases of multiple interval changes.
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M3 - Article
C2 - 14994509
AN - SCOPUS:25444487773
VL - 64
SP - 35
EP - 40
JO - Nippon Igaku Hoshasen Gakkai zasshi. Nippon acta radiologica
JF - Nippon Igaku Hoshasen Gakkai zasshi. Nippon acta radiologica
SN - 0048-0428
IS - 1
ER -