Explanipedia

Evaluation of photon-counting micro-CT scanning for imaging marine organisms Open

M. Xue, Tianwu Xie, Qian Liu · 2025

Introduction Anatomical information is crucial in marine biology research. Traditionally, destructive techniques, such as slice imaging of the sample, are used to image the inside of the sample, which are unsuitable for valuable or rare sp…

Damage modes and mechanical properties of Ti6Al4V lattice structures under transverse impact loading Open

Minghao Huang, Y. X. Luo, Tianwu Xie, Xinqi Yang, Shenghang Xu , et al. · 2025

The light-weighting of high-end equipment structural components is an eternal pursuit in structural engineering. The development of Laser Powder Bed Fusion (L-PBF) technology has enabled the easy fabrication of lattice structure materials,…

Absorbed dose differences between twin fetuses for pregnancy patients in CT examinations Open

Shuiyin Qu, Hao-Ran Jia, Habib Zaidi, Tianwu Xie · 2025

Background Estimation of the radiation dose to the fetus is essential for the assessment of radiation risks and benefits to pregnant patients undergoing radiological examinations. During the past decade, the global twinning rate has soared…

Optimizing scan duration and tracer dose in radiomic analysis for 18F-FDG PET/MR brain cancer Open

Mingzan Zhuang, Zhifen Qiu, Xianru Li, Tianwu Xie · 2024

Objectives: This study is to optimize scan duration and tracer dose in radiomic analysis for 18F-FDG PET/MR brain cancer. Methods: Seventeen patients with brain cancer underwent PET/MR scans with injection of 3.70 MBq/kg 18F-FDG. PET image…

Advanced deep learning models for phenotypic trait extraction and cultivar classification in lychee using photon-counting micro-CT imaging Open

Mengjia Xue, Siyi Huang, Wenting Xu, Tianwu Xie · 2024

Introduction In contemporary agronomic research, the focus has increasingly shifted towards non-destructive imaging and precise phenotypic characterization. A photon-counting micro-CT system has been developed, which is capable of imaging …

Ultrasound image segmentation of renal tumors based on UNet++ with fusion of multiscale residuals and dual attention Open

Hui Qi, Z. Jane Wang, Xiaobo Qi, Ying Shi, Tianwu Xie · 2024

Objective . Laparoscopic renal unit-preserving resection is a routine and effective means of treating renal tumors. Image segmentation is an essential part before tumor resection. The current segmentation method mainly relies on doctors ma…

Guided block matching and 4-D transform domain filter projection denoising method for dynamic PET image reconstruction Open

Xin Lin, Weihai Zhuo, Haikuan Liu, Tianwu Xie · 2023

CNN-based automatic segmentations and radiomics feature reliability on contrast-enhanced ultrasound images for renal tumors Open

Yin Yang, Fei Chen, Hongmei Liang, Yun Bai, Zhen Wang , et al. · 2023

Objective To investigate the feasibility and efficiency of automatic segmentation of contrast-enhanced ultrasound (CEUS) images in renal tumors by convolutional neural network (CNN) based models and their further application in radiomic an…

Patient‐specific fetal radiation dosimetry for pregnant patients undergoing abdominal and pelvic CT imaging Open

Shuiyin Qu, Haikuan Liu, Tianwu Xie, Maryellen L. Giger, Guotao Quan , et al. · 2023

Background Accurate estimation of fetal radiation dose is crucial for risk‐benefit analysis of radiological imaging, while the radiation dosimetry studies based on individual pregnant patient are highly desired. Purpose To use Monte Carlo …

Triple-source saddle-curve cone-beam photon counting CT image reconstruction: A simulation study Open

Xin Lin, Weihai Zhuo, Qian Liu, Tianwu Xie, Habib Zaidi · 2022

Potential of Fluid Dynamic Bowtie Filter for Dose Reduction and Image Quality Improvement of Cone-Beam CT Open

Xin Lin, Weihai Zhuo, Haikuan Liu, Tianwu Xie · 2022

Reducing radiation dose to patients without compromising imaging quality has been an important issue in the medical use of X-ray computed tomography (CT). In this study, based on the conceptual designs of different types of attenuation fil…

Construction of a digital fetus library for radiation dosimetry Open

Shuiyin Qu, Tianwu Xie, Maryellen L. Giger, Xianqing Mao, Habib Zaidi · 2022

Purpose Accurate estimations of fetal absorbed dose and radiation risks are crucial for radiation protection and important for radiological imaging research owing to the high radiosensitivity of the fetus. Computational anthropomorphic mod…

Fetal Radiation Dosimetry in CT Imaging: Construction of A Digital Fetus Library Open

Shuiyin Qu, Tianwu Xie, Maryellen L. Giger, Habib Zaidi · 2022

The first fetal patient-specific model library was developed with the anatomical characteristics of each model derived from the patient whose gestational age varies from 8- to 35-weeks. MCNP input file is provided for radiation dosimetry.

Tracers progress for positron emission tomography imaging of glial-related disease Open

Hao‐Ran Jia, Tianwu Xie · 2022

Glial cells play an essential part in the neuron system. They can not only serve as structural blocks in the human brain but also participate in many biological processes. Extensive studies have shown that astrocytes and microglia play an …

Multi-scale Monte Carlo simulations of gold nanoparticle-induced DNA damages for kilovoltage X-ray irradiation in a xenograft mouse model using TOPAS-nBio Open

A.P. Klapproth, Jan Schuemann, Stefan Stangl, Tianwu Xie, Wei Bo Li , et al. · 2021

Estimating Specific Patient Organ Dose for Chest CT Examinations with Monte Carlo Method Open

Yang Yang, Weihai Zhuo, Yiyang Zhao, Tianwu Xie, Chuyan Wang , et al. · 2021

Purpose: The purpose of this study was to preliminarily estimate patient-specific organ doses in chest CT examinations for Chinese adults, and to investigate the effect of patient size on organ doses. Methods: By considering the body-size …

Internal dosimetry in F-18 FDG PET examinations based on long-time-measured organ activities using total-body PET/CT: does it make any difference from a short-time measurement? Open

Pengcheng Hu, Xin Lin, Weihai Zhuo, Hui Tan, Tianwu Xie , et al. · 2021

Internal dosimetry in F-18 FDG PET examinations based on long time measured organ activities using total-body PET/CT: dose it makes any difference from a short-time measurement? Open

Pengcheng Hu, Xin Lin, Weihai Zhuo, Hui Tan, Tianwu Xie , et al. · 2020

Purpose The 2-meter long total-body PET/CT scanner (uEXPLORER) has been developed recently while its total-body coverage and ultra-high sensitivity provide opportunities for in vivo time-activity curve (TAC) measurement of all investigated…

Age‐dependent dose calculations for common PET radionuclides and brain radiotracers in nonhuman primate computational models Open

Tianwu Xie, Xin Chen, Habib Zaidi · 2020

Purpose The combination of nonhuman primates (NHPs) with the state‐of‐the‐art molecular imaging technologies allows for within‐subject longitudinal research aiming at gaining new insights into human normal and disease conditions and provid…

Assessment of uncertainties associated with Monte Carlo-based personalized dosimetry in clinical CT examinations Open

Azadeh Akhavanallaf, Tianwu Xie, Habib Zaidi · 2020

The clinical value of x-ray computed tomography (CT) has skyrocketed in the last decade while at the same time being the main source of medical exposure to the population. Concerns regarding the potential health hazards associated with the…

Development of a nonhuman primate computational phantom for radiation dosimetry Open

Tianwu Xie, Jin Seo Park, Weihai Zhuo, Habib Zaidi · 2019

Purpose The nonhuman primate (NHP) is an important animal model for evaluating the response of the human body to radiation exposure owing to similarities between its organ structure, genome, life span, and metabolism. However, there is a l…

Estimation of the radiation dose in pregnancy: an automated patient-specific model using convolutional neural networks Open

Tianwu Xie, Habib Zaidi · 2019

Construction of patient‐specific computational models for organ dose estimation in radiological imaging Open

Tianwu Xie, Azadeh Akhavanallaf, Habib Zaidi · 2019

Purpose Diagnostic imaging procedures require optimization depending on the medical task at hand, the apparatus being used, and patient physical and anatomical characteristics. The assessment of the radiation dose and associated risks play…

Development of a Library of Adult Computational Phantoms Based on Anthropometric Indexes Open

Azadeh Akhavanallaf, Tianwu Xie, Habib Zaidi · 2018

Computational phantom libraries have been developed over the years to enhance the accuracy of Monte Carlo-based radiation dose calculations from radiological procedures. In this paper, we report on the development of an adult computational…

Patient-Specific Computational Model and Dosimetry Calculations for PET/CT of a Patient Pregnant with Twins Open

Tianwu Xie, Paolo Zanotti‐Fregonara, Agathe Edet‐Sanson, Habib Zaidi · 2018

The radiation dose delivered to pregnant patients during radiologic imaging procedures raises health concerns because the developing embryo and fetus are considered to be highly radiosensitive. To appropriately weigh the diagnostic benefit…

Effects of body habitus on internal radiation dose calculations using the 5-year-old anthropomorphic male models Open

Tianwu Xie, Niels Kuster, Habib Zaidi · 2017

Computational phantoms are commonly used in internal radiation dosimetry to assess the amount and distribution pattern of energy deposited in various parts of the human body from different internal radiation sources. Radiation dose assessm…

Construction of personalized computational phantoms of pregnant patients for assessment of CT radiation dose Open

Tianwu Xie, Pierre‐Alexandre Poletti, Christoph R. Becker, Habib Zaidi · 2016

The use of x-ray computed tomography (CT) has increased drastically worldwide during the last two decades and is nowadays playing a pivotal role in clinical diagnosis and radiation therapy planning. The radiation dose delivered to the fetu…

Development of computational small animal models and their applications in preclinical imaging and therapy research Open

Tianwu Xie, Habib Zaidi · 2015

The development of multimodality preclinical imaging techniques and the rapid growth of realistic computer simulation tools have promoted the construction and application of computational laboratory animal models in preclinical research. S…

Assessment of radiation dose in nuclear cardiovascular imaging using realistic computational models Open

Tianwu Xie, Choonsik Lee, Wesley E. Bolch, Habib Zaidi · 2015

(82)Rb results in lower effective dose in adults compared to (99m)Tc-labeled tracers. However, this advantage is less apparent in children. The produced dosimetric databases for various radiotracers used in cardiovascular imaging, using ne…

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