Výsledky vyhledávání - "W Paul Segars"

Dose coefficients for organ dosimetry in tomosynthesis imaging of adults and pediatrics across diverse protocols

Autor: Shobhit Sharma, Anuj Kapadia, Francesco Ria, W. Paul Segars, Ehsan Samei

Publikováno v: Med Phys

PURPOSE: The gold-standard method for estimation of patient-specific organ doses in digital tomosynthesis (DT) requires protocol-specific Monte Carlo (MC) simulations of radiation transport in anatomically accurate computational phantoms. Although ac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67f08e81045ffae354f4bf9aed895936
https://doi.org/10.1002/mp.15798

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Development and Clinical Applications of a Virtual Imaging Framework for Optimizing Photon-counting CT

Autor: Ehsan Abadi, Cindy McCabe, Brian Harrawood, Saman Sotoudeh-Paima, W. Paul . Segars, Ehsan Samei

Publikováno v: Proc SPIE Int Soc Opt Eng

The purpose of this study was to develop a virtual imaging framework that simulates a new photon-counting CT (PCCT) system (NAEOTOM Alpha, Siemens). The PCCT simulator was built upon the DukeSim platform, which generates projection images of computat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1fda20b264ae61ff818f60e1bfe3483a
https://pubmed.ncbi.nlm.nih.gov/35611365

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XCIST-an open access x-ray/CT simulation toolkit

Autor: Mingye Wu, Paul FitzGerald, Jiayong Zhang, W Paul Segars, Hengyong Yu, Yongshun Xu, Bruno De Man

Publikováno v: Physics in medicine and biology. 67(19)

Objective. X-ray-based imaging modalities including mammography and computed tomography (CT) are widely used in cancer screening, diagnosis, staging, treatment planning, and therapy response monitoring. Over the past few decades, improvements to thes

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e320bab41e9c9df3f49ca71b06f8e91c
https://pubmed.ncbi.nlm.nih.gov/36096127

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Model-based pulse pileup and charge sharing compensation for photon counting detectors: A simulation study

Autor: Katsuyuki Taguchi, Christoph Polster, W. Paul Segars, Nafi Aygun, Karl Stierstorfer

Publikováno v: Medical physics. 49(8)

We aim at developing a model-based algorithm that compensates for the effect of both pulse pileup (PP) and charge sharing (CS) and evaluates the performance using computer simulations.The proposed PCP algorithm for PP and CS compensation uses cascade

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a903f337f0fbcf8ed1f0690fed6b18e1
https://pubmed.ncbi.nlm.nih.gov/35722721

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Three‐dimensional regions‐of‐interest–based intra‐operative four‐dimensional soft tissue perfusion imaging using a standard x‐ray system with no gantry rotation: A simulation study for a proof of concept

Autor: Thomas J. Sauer, Jingyan Xu, Mathias Unberath, Kelvin Hong, J. Webster Stayman, Katsuyuki Taguchi, Eleni Liapi, Yong Du, W. Paul Segars, Ferdinand K. Hui, Eric C. Frey

Publikováno v: Medical Physics. 47:6087-6102

PURPOSE Many interventional procedures aim at changing soft tissue perfusion or blood flow. One problem at present is that soft tissue perfusion and its changes cannot be assessed in an interventional suite because cone-beam computed tomography is to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::35220eb30de853886aedf33e4b2f3793
https://doi.org/10.1002/mp.14514

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Emphysema quantifications with CT: Assessing the effects of acquisition protocols and imaging parameters using virtual imaging trials

Autor: Ehsan, Abadi, Giavanna, Jadick, David A, Lynch, W Paul, Segars, Ehsan, Samei

Publikováno v: Chest.

CT has notable potential to quantify the severity and progression of patients with emphysema. Such quantification should ideally reflect the true attributes and pathologies of subjects, not scanner parameters. To achieve such an objective, the effect

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::abf90bc5b1f9e1d292d13c0b6ba70834
https://pubmed.ncbi.nlm.nih.gov/36462532

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