Measurement of the spatial resolution and the relative density resolution in an industrial cone-beam micro computed tomography system

王燕芳,; 阙介民,; 曹大泉,; Wang, Yafang; Que, JM; Cao, DQ; Sun, Cheng‐Hang; Zhao, Wenxiu; Wei, CF; Shi, RJ; Wei, Laixing; 孙翠丽,; 赵维,; 魏存峰,; 史戎坚,; 魏龙,

doi:10.1088/1674-1137/37/7/078202

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…Slits measurement [5,6] is a simple sample preparation and is a high accuracy method, but requires a good parallelization of the slits and the pixel array of FPD. Steps measurement [7][8][9] has the differential operator in the calculation from the edge spread function to line spread function, which makes it very sensitive to noises, and the calculated modulation transfer function will be lower than the result of the slits measurement. Pinhole measurement [10,11] is widely used for focal spot diagnostics and PSF measurement in various ray sources, but the ideal pinhole imaging in actual systems is difficult to obtain.…”

Section: Introductionmentioning

confidence: 99%

Point spread function modeling and image restoration for cone-beam CT

Zhang¹,

Huang²,

Yan³

et al. 2015

Chinese Phys. C

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X-ray cone-beam computed tomography (CT) has the notable features such as high efficiency and precision, and is widely used in the fields of medical imaging and industrial non-destructive testing, but the inherent imaging degradation reduces the quality of CT images. Aimed at the problems of projection images degradation and restoration in cone-beam CT, a point spread function (PSF) modeling method is proposed firstly. The general PSF model of cone-beam CT is established, and based on it, the PSF under arbitrary scanning conditions can be calculated directly for projection images restoration without the additional measurement, which greatly improved the application convenience of cone-beam CT. Secondly, a projection images restoration algorithm based on pre-filtering and pre-segmentation is proposed, which can make the edge contours in projection images and slice images clearer after restoration, and control the noise in the equivalent level to the original images. Finally, the experiments verified the feasibility and effectiveness of the proposed methods.

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Section: Introductionmentioning

confidence: 99%

Point spread function modeling and image restoration for cone-beam CT

Zhang¹,

Huang²,

Yan³

et al. 2015

Chinese Phys. C

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High-quality super-resolution reconstruction: Using the improved industrial computed laminography system and SR-iResASPP network to reconstruct aero-engine turbine discs

Gao,

Chen,

Wang

et al. 2025

Measurement

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Experimental realization of scanning quantum microscopy

Gili

Piccinini

Arabi

et al. 2022

Applied Physics Letters

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Quantum imaging is an ever expanding research field in which the aim is to exploit the quantum nature of light to enhance image reconstruction capabilities. Despite a number of successful demonstrations for quantum imaging, quantum microscopy still seems out of the range for practical applications due to different physical and technical reasons. Here, we propose an imaging method exploiting the quantum correlations of photon pairs and a scanning microscope to achieve fast, single mode quantum imaging. We first test our technique on a metal grating to estimate the resolution capabilities of our system. Moreover, we assess its potential in terms of the number of available independent pixels at full resolution compared to different quantum imaging approaches. Finally, we demonstrate scanning quantum microscopy of onion epithelial cells, paving the way toward scalable quantum microscopy for bio-physical applications. Our results, combined with the rapidly evolving photon-pair generation and detection technology toward the mid-infrared, could lead to an extension of quantum microscopy applications toward the mid-infrared to access the molecular fingerprint region.

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Measurement of the spatial resolution and the relative density resolution in an industrial cone-beam micro computed tomography system

Cited by 3 publications

References 4 publications

Point spread function modeling and image restoration for cone-beam CT

Point spread function modeling and image restoration for cone-beam CT

High-quality super-resolution reconstruction: Using the improved industrial computed laminography system and SR-iResASPP network to reconstruct aero-engine turbine discs

Experimental realization of scanning quantum microscopy

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