Naoki Kodama1, Thai Van Loc2, Phan Thanh Hai2, Nguyen Van Cong2, Shinsuke Katsuhara3, Satoshi Kasai3, Aziz Sheikh4. 1. Department of Radiological Technology, Faculty of Medical Technology, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata city, Niigata 950-3198, Japan. Electronic address: kodama@nuhw.ac.jp. 2. Medic Medical Center, 254 Hoa Hao st. ward 4th. 10 dist., Hochiminh City, Viet Nam. 3. Image Processing Technology Department, Technology R&D Division, R&D Operations, Healthcare Business Unit, KONICA MINOLTA, INC, 2970 Ishikawa-machi, Hachioji, Tokyo 192-8505, Japan. 4. Sales Planning Department, Sales Operations, Healthcare Business Unit, KONICA MINOLTA, INC, 1 Sakura-machi, Hino, Tokyo 191-8511, Japan.
Abstract
OBJECTIVE: To assess the effectiveness of bone suppression imaging (BSI) in the diagnosis of tuberculosis from chest radiographs (CXRs) in Vietnam. MATERIALS AND METHODS: A total of 97 images (50 tuberculosis and 47 normal) comprised the dataset for this observer study with unanimous consensus of a panel of 3 expert radiologists. The participants were 9 Vietnamese radiologists (6 chest radiologists and 3 non-chest radiologists). Participants recorded their confidence levels regarding the presence of tuberculosis after reading a standard chest radiograph directly first and then after BSI processing. Receiver operating characteristic (ROC) analysis was used to evaluate participant performance. In addition, the change in participants' decision regarding the presence or absence of tuberculosis after BSI processing was recorded for each patient. Improvements in sensitivity and specificity were calculated. RESULTS: The average AUC for non-chest radiologists improved from 0.882 without BSI to 0.933 with BSI (P = 0.048). In addition, BSI improved sensitivity by 10.0% whereas specificity decreased by 2.8% among non-chest radiologists. CONCLUSION: Using BSI improved the accuracy of tuberculosis diagnosis from CXRs, particularly by non-chest radiologists.
OBJECTIVE: To assess the effectiveness of bone suppression imaging (BSI) in the diagnosis of tuberculosis from chest radiographs (CXRs) in Vietnam. MATERIALS AND METHODS: A total of 97 images (50 tuberculosis and 47 normal) comprised the dataset for this observer study with unanimous consensus of a panel of 3 expert radiologists. The participants were 9 Vietnamese radiologists (6 chest radiologists and 3 non-chest radiologists). Participants recorded their confidence levels regarding the presence of tuberculosis after reading a standard chest radiograph directly first and then after BSI processing. Receiver operating characteristic (ROC) analysis was used to evaluate participant performance. In addition, the change in participants' decision regarding the presence or absence of tuberculosis after BSI processing was recorded for each patient. Improvements in sensitivity and specificity were calculated. RESULTS: The average AUC for non-chest radiologists improved from 0.882 without BSI to 0.933 with BSI (P = 0.048). In addition, BSI improved sensitivity by 10.0% whereas specificity decreased by 2.8% among non-chest radiologists. CONCLUSION: Using BSI improved the accuracy of tuberculosis diagnosis from CXRs, particularly by non-chest radiologists.