ConferenceProgress in Biomedical Optics and Imaging Proceedings of SPIE · January 1, 2025
Computed tomography (CT) dose and image quality data exhibit a large variability even for the same patient size. That is so despite the tube current modulation (TCM) systems adjusting radiation exposure according to patient body habitus to achieve consiste ...
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ConferenceProgress in Biomedical Optics and Imaging Proceedings of SPIE · January 1, 2024
Photon-counting CT (PCCT) and energy-integrating CT (EICT) system offer differing image quality attributes, but it is uncertain if such attributes manifest themselves differently across phantom vs patients. This study investigated if image quality assessme ...
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Conference · November 26, 2023
Purpose: The purpose of this study is to compare the absolute CT attenuation errors of cystic renal lesions and abdominal organs on virtual noncontrast images (VNC) between photon-counting (PCCT) and energy-integrating (EID) detector CT systems.
Methods a ...
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Conference · November 26, 2023
Purpose: To compare image quality of portal venous phase (PVP) abdominal CT examinations and virtual non-contrast (VNC) images between photon-counting CT (PCCT) and energy-integratingDetector CT (EID).
Methods and Materials:
In this HIPAA compliant, IRB-a ...
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Conference · November 26, 2023
Purpose. We recently developed a mathematical model to balance radiation risk and clinical risk, namely the risk of misdiagnosis due to insufficient image quality. In this work, we applied this model to a population of one million CT imaging cases to evalu ...
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Conferencehttps://aapm.onlinelibrary.wiley.com/doi/epdf/10.1002/mp.16525 · July 23, 2023
Achieving consistent and sufficient hepatic parenchyma contrast enhancement (HPCE) level can improve diagnostic performance and reduce enhancement variability; this raises the baseline image quality and optimize injection practices, both carries economic a ...
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Conferencehttps://aapm.onlinelibrary.wiley.com/doi/epdf/10.1002/mp.16525 · July 23, 2023
Purpose
Noise magnitude is a main CT image quality indicator. In vivo measurements emerged as a patient-specific methodology to assess and qualify CT noise, yet methods to do so vary. Current noise measurement methods in soft tissues and air surrounding t ...
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ConferenceProgress in Biomedical Optics and Imaging Proceedings of SPIE · January 1, 2022
Several methods have been introduced over the years to measure CT image noise magnitudes in vivo applying different image segmentation strategies, HU thresholds, and regions of interests in which the noise is calculated. Therefore, it is impossible to dire ...
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Conference · December 1, 2021
Purpose: Risk in medical imaging is a combination of radiation risk and clinical risk, which is largely driven by the effective diagnosis. While radiation risk has traditionally been the main focus of Computed Tomography (CT) optimization, such a goal cann ...
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Conference · December 1, 2021
Purpose. Recent studies have shown that it is not uncommon for a patient to undergo multiple CT exams resulting in high cumulative dose above 100 mSv, the radiation risk associated with which is not negligible. The purpose of this study was to compare the ...
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Conference · December 2, 2020
Purpose. Radiologic procedures are recommended based on benefit-to-risk justification. In X-ray imaging, while the benefit is often immediate for the patient, the associated radiation burden risk is a longer-term effect. Such a temporal gap can bias the ju ...
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Conference · December 2, 2020
PURPOSE
Virtual imaging trial is a unique framework that can greatly facilitate the assessment and optimization of imaging, by emulating the experiments using representative models of patients and scanners. This study aimed to impalement and demonstrate a ...
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Conference · December 4, 2019
Purpose.
Radiological risk is a combination of radiation and clinical risk (likelihood of not delivering a proper diagnosis), which together may be characterized as a total risk index (TRI). While many strategies have been developed to ascertain radiation ...
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Conference · November 27, 2018
PURPOSE
Ascertaining radiological procedure radiation burden is essential for justification, optimization, and personalization of the procedure. While the exact radiation risk for an individual exam is unknowable, various risk-related figures have been use ...
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Conference · November 27, 2018
PURPOSE
Effective dose can efficiently integrate multiple organ dose values into a singular scalar value of radiation dose. The effective dose can also be calculated using dose length product (DLP) to effective dose conversion coefficients. The purpose of ...
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Conference · November 27, 2018
PURPOSE
To develop a data-centric strategy solution for developing CT dose and noise reference levels across large clinical patient populations and in CT scanners.
METHOD AND MATERIALS
This IRB-exempt study evaluated CT abdominopelvic (AP)-related examin ...
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Conference · November 26, 2018
PURPOSE
The diagnostic reference level (DRL) is useful as a first-order tool to compare radiation exposures of one's imaging clinic against those of one's peers in computed tomography. Ria et al. have advocated for the addition of a Noise Reference Level ( ...
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Conference · November 25, 2018
PURPOSE
To develop an effective and automated methodology for patient-specific image quality assessment of clinical pediatric body CT examinations.
METHOD AND MATERIALS
This IRB approved study evaluated 816 clinically performed (6/14-11/17), contrast-enh ...
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Conference · November 25, 2018
PURPOSE
To apply an automated program for evaluating pediatric body CT study quality which utilizes metrics of dose and image quality for optimization of liver lesion detection.
METHOD AND MATERIALS
With IRB approval, 880 clinical contrast-enhanced abdom ...
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Conference · November 26, 2017
Conclusion
This study represents a proof of concept method to develop and refine a Noise Reference Level for a given protocol and scanner. This represents a first step in establishing an automated Performance Reference Level for a given scan protocol that ...
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Conference · November 26, 2017
PURPOSE
The aim of this study was to assess the impact on organ dose estimation for Body CT examinations when the patient is matched to the wrong virtual phantom.
METHODS AND MATERIALS
Patient-specific organ dosimetry is estimated using a Monte Carlo fram ...
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ConferenceMed Phys · June 2016
PURPOSE: Inconsistency in the scan range for a given protocol can be a source of variability in patient dose. The purpose of this study was to determine the variability in the over-scan length in clinical CT operation for chest and abdominopelvic (A&P) pro ...
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Conference · November 29, 2015
CONCLUSION
Radiation dose reduction, while saving image quality could be easily implemented with this approach. Furthermore, the availability of a dosimetric data archive provides immediate feedbacks, related to the implemented optimization strategies.
Ba ...
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https://orcid.org/0000-0001-5902-7396