Oral Radiol. 2026 May 12. doi: 10.1007/s11282-026-00922-w. Online ahead of print.
ABSTRACT
OBJECTIVES: To evaluate the influence of different spatial scanning resolutions of photostimulable phosphor (PSP) plates on digital radiographic images using texture analysis (TA).
MATERIALS AND METHODS: Digital radiographs of an aluminum step wedge with five steps (0.5 mm increments) were acquired at two radiographic exposure times (0.10 and 0.20 s). Each image was scanned at four different spatial resolutions (10, 20, 25, and 40 lp/mm), with 10 repetitions per condition. Regions of interest (ROIs) were placed on the steps with thicknesses of 0.5, 1.5, and 2.5 mm. Texture features based on the gray-level co-occurrence matrix (GLCM) were extracted using MaZda 4.6 software. Exploratory data analysis was performed, and spatial resolutions were compared within each combination of exposure time and object thickness using ANOVA, followed by Tukey’s post-hoc test (p < 0.05).
RESULTS: At 0.10 s exposure, eight texture parameters exhibited statistically significant differences among spatial resolutions, independent of object thickness, with higher values observed at 10 and 20 lp/mm. For an exposure of 0.20 s, two parameters also showed significant differences across resolutions, with higher values at lower resolutions.
CONCLUSIONS: TA revealed that, in the tested PSP system, lower scanning resolutions resulted in images with reduced homogeneity and uniformity, regardless of object thickness.
PMID:42120804 | DOI:10.1007/s11282-026-00922-w
