Cone-Beam CT for Breast Specimens in Surgery: The Phantom Study

Thongvigitmanee, Saowapak S.; Aootaphao, Sorapong; Thanasupsombat, Chalinee; Kiang-ia, Atthasak; Narkbuakaew, W.; Wangkaoom, Kongyot; Junhunee, Parinya; Laohawiriyakamol, Suphawat; Puttawibul, Puttisak; Thajchayapong, P.

doi:10.1109/nssmic.2018.8824590

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…The MPE value was calculated from the reconstructed images in each iteration using equation (5). Reconstruction with and without the proposed work was fixed at 𝛽 =150, 𝛿 = 0.00001, 1000 iterations and varied acceleration techniques as follows: OS-10 and NES-10.…”

Section: Mean-percentage-error Evaluationmentioning

confidence: 99%

“…Cone-beam computed tomography (CBCT) technology, which uses the modern equipment of an x-ray source and a flat-panel detector (FPD), is widely used due to its small machine size, large field of view (FOV), and low radiation dose [1][2][3]. Most of this technology is applied for diagnosis and treatment planning, such as dental, maxillofacial, orthopaedic, and breast-cancer specimen imaging [4,5]. The quality of images reconstructed from CBCT is often deteriorated by many causes, such as X-ray scattering, beam hardening, metal artifact, and truncation artifact [4,[6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Truncation effect reduction for fast iterative reconstruction in cone-beam CT

Aootaphao

Thongvigitmanee

Puttawibul

et al. 2021

Preprint

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Background: Iterative reconstruction for cone-beam computed tomography (CBCT) has been applied to improve image quality and reduce radiation dose. In a case where an object is larger than a flat panel detector, most CBCT images contain truncated data or incomplete projections, which degrade image quality. In this work, we propose the truncation effect reduction for fast iterative reconstruction in CBCT imaging inside the field of view (FOV).Methods: The volume matrix size of FOV and the height of projection images were extrapolated to a suitable size. These extended projections were reconstructed by fast iterative reconstruction. Moreover, a smoothing parameter for noise regularization in iterative reconstruction was also modified to reduce the accumulated error while processing. The proposed work was evaluated by image quality measurements and compared with the conventional filtered back projection (FBP) method. To validate the proposed method, we used a head phantom for evaluation and tested on real human head data. Results: In the experimental results, the reconstructed images from the head phantom can be enhanced apparently. In addition, fast iteration reconstruction can be run continuously while remaining the consistent mean-percentage-error (MPE) value with a large number of iterations. The CNR of the soft-tissue images was improved by the increased contrast and the decreased noise. Visualization of low contrast in the ventricle and soft-tissue images can be observed much clearer compared to those from FBP using the same effective radiation dose of 5 mGy. Conclusions: Our proposed work has satisfactory performance to reduce the truncation effect, especially inside the FOV with better image quality for soft-tissue imaging. The convergence of fast iterative reconstruction tends to be stable for many iterations.

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Section: Mean-percentage-error Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Truncation effect reduction for fast iterative reconstruction in cone-beam CT

Aootaphao

Thongvigitmanee

Puttawibul

et al. 2021

Preprint

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“…CT enables physicians to non-invasively visualize internal anatomical features in a fast and reliable manner. In addition, CT, especially micro-CT, is also widely used for imaging biological specimens [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Breast tumor margin delineation with high-resolution cone-beam x-ray computed tomography

Sinsuebphon¹,

Laohawiriyakamol

Thanasupsombat

et al. 2023

Medical Imaging 2023: Biomedical Applications in Molecular, Structural, and Functional Imaging

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Breast-conserving surgery (BCS) is an alternative approach for tumor removal in breast tumor patients. This procedure requires confirmation of the tumor margin. In this study, a high-resolution cone-beam X-ray computed tomography (CBCT) was designed and evaluated for the application of breast tumor margin delineation. The imaging system was validated with a CBCT image quality phantom for spatial resolution and contrast. In addition, a breast phantom containing multiple pathological features was investigated. Finally, a breast tumor specimen was examined on the high-resolution CBCT. The results showed that the imaging system could provide a decent spatial resolution and great contrast. The pathological features of the breast phantom were clearly visible. The margin of the excised breast specimen was well defined by the system. Overall, the high-resolution CBCT provides a promising result for the clinical application.

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