EVALUATION OF DIAGNOSTIC ACCURACY OF THE SYSTEM FOR PULMONARY TUBERCULOSIS SCREENING BASED ON ARTIFICIAL NEURAL NETWORKS

• Main Authors: S. P. Morozov, A. V. Vladzimirskiy, N. V. Ledikhova, I. A. Sokolina, N. S. Kulberg, V. A. Gombolevskiy
• Format: Article
• Language: Russian
• Published: NEW TERRA Publishing House 2018-09-01
• Series: Tuberkulez i Bolezni Lëgkih
• Subjects: pulmonary tuberculosis; screening; artificial intelligence; convolutional neural networks
• Online Access: https://www.tibl-journal.com/jour/article/view/1164
• ISSN: 2075-1230; 2542-1506

The objective of the study: to evaluate the applicability of the automated system for detection of chest diseases during a regular mass screening of the population through assessment of universe parameters of diagnostic accuracy.Subjects and methods. A retrospective diagnostic study was conducted. The index-test (the method being studied) implied distinction and analysis of X-ray films using the software based on convolutional neural networks of U-NET type, which were modified and trained for specific purposes. The reference method used was the double revision of the previously classified X-ray films by two qualified roentgenologists with work experience of 8-10 years. Two depersonalized samplings of digital X-ray films were used: Sample 1 (n = 140), the ratio of the norm and pathology made 50 : 50; Sample 2 (n = 150), the ratio of the norm and pathology made 95 : 5.Results. The following parameters were set up for Samples 1 and 2 respectively: sensitivity ‒ 87.2 and 75.0%, specificity ‒ 60.0 and 53.5%, the prognostic value of the positive result ‒ 68.6 and 8.3%, the prognostic value of the negative result ‒ 82.4 and 97.5%, the area under characteristic curve ‒ 0.74 and 0.64.Conclusions. The index test can be used only for mass regular screening in the population with low pre-test chances of pathology, which is confirmed by the prognostic value of the negative result (97.5%). This technology was recommended for the semiautomatic formation of pulmonary tuberculosis risk groups for consequent verification of the results by a roentgenologist.