ArticleSkeletal radiology2026
Development and evaluation of an ultra-high-resolution cone-beam computed tomography system for hand and foot.
Article in Skeletal radiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveTo develop an experimental ultra-high-resolution cone-beam computed tomography (UHRCBCT) system for imaging the human hand and foot and to evaluate its spatial resolution, image noise, radiation dose, and feasibility through phantom and volunteer studies. MATERIALS AND
methodsThe UHRCBCT system was built based on a 0.5-mm focal spot X-ray tube and a 0.099-mm pixel CMOS detector. A low magnification geometry (magnification: 1.22) was applied to reduce geometry blurring. Images were reconstructed with a voxel size of 0.10 × 0.10 × 0.10 mm
resultsThe effective dose estimated from CTDI was 0.024 mSv using a conversion factor of 0.0005 mSv/(mGy cm), which was within the lowest category for healthy volunteers in ICRP publication 103. The 5%MTF-based spatial resolution was 0.10 mm, significantly smaller than 0.23 mm achieved by HRMSCT. Image noise was approximately twice as high in UHRCBCT; however, trabecular bone structures and joint spaces were more distinctly visualized in both phantom and volunteer images.
conclusionUHRCBCT achieved a high resolution of 0.10-mm in imaging trabecular hand and foot bones with an acceptable radiation dose, indicating potential for clinical application in orthopedic diagnosis.
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