Evaluation of the clinical utility of temporal subtraction using bone suppression processing in digital chest radiography

Takeshi Takaki; Seiichi Murakami; Natsumi Tani; Takatoshi Aoki

doi:10.1016/j.heliyon.2023.e13004

Evaluation of the clinical utility of temporal subtraction using bone suppression processing in digital chest radiography

Heliyon. 2023 Jan 16;9(1):e13004. doi: 10.1016/j.heliyon.2023.e13004. eCollection 2023 Jan.

Authors

Takeshi Takaki¹, Seiichi Murakami², Natsumi Tani³, Takatoshi Aoki³

Affiliations

¹ Department of Radiology, Hospital of University of Occupational and Environmental Health, Iseigaoka 1-1, Yahatanishi-ku, Kitakyushu-shi, Fukuoka, 807-8555, Japan.
² Department of Radiological Science, Junshin Gakuen University, 1-1-1 Chikushigaoka, Minami-ku, Fukuoka, 815-8510, Japan.
³ Department of Radiology, University of Occupational and Environmental Health School of Medicine, Iseigaoka 1-1, Yahatanishi-ku, Kitakyushu-shi, Fukuoka, 807-8555, Japan.

Abstract

Rationale and objectives: To evaluate the usefulness of temporal subtraction using the bone suppression method in digital chest radiography for the detection of pulmonary lesions.

Materials and methods: The images of 31 patients with pulmonary lesions and 19 normal cases were included in the study. Conventional and bone suppression temporal subtraction were performed in the 50 cases selected and used for an observer performance study. Five radiologists participated in the study, and the differences between using conventional and bone suppression temporal subtraction were assessed using jackknife free-response receiver operating characteristic analysis.

Results: The average figure-of-merit values for all radiologists increased significantly using the bone suppression method, from 0.619 (conventional) to 0.696 (p = 0.032). The average sensitivity for detecting pulmonary lesions improved from 67.9% to 75.4%, and the average number of false-positive per case decreased from 0.336 to 0.252 using bone suppression temporal subtraction.

Conclusion: Bone suppression temporal subtraction processing can assist with the detection of subtle pulmonary lesions in digital chest radiographs.

Keywords: BS, bone suppression; Bone suppression processing; CT, computed tomography; Digital chest radiography; FOM, figure-of-merit; FPs, false positives; FROC, free-response receiver operating characteristic; FWHM, full width at half maximum; JAFROC, jackknife free-response receiver operating characteristic; Pulmonary lesions; ROC, receiver operating characteristic; TS, temporal subtraction; Temporal subtraction.