Vector-Field dynamic X-ray (VF-DXR) using Optical Flow Method.

ABSTRACT:

Objectives

To explore the feasibility of Vector-Field DXR (VF-DXR) using optical flow method (OFM).

Methods

Five healthy volunteers and five COPD patients were studied. DXR was performed in the standing position using a prototype X-ray system (Konica Minolta Inc., Tokyo, Japan). During the examination, participants took several tidal breaths and one forced breath. DXR image file was converted to the videos with different frames per second (fps): 15 fps, 7.5 fps, five fps, three fps, and 1.5 fps. Pixel-value gradient was calculated by the serial change of pixel value, which was subsequently converted mathematically to motion vector using OFM. Color-coding map and vector projection into horizontal and vertical components were also tested.

Results

Dynamic motion of lung

SUBMITTER: Hino T 

PROVIDER: S-EPMC9153721 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature