Liqiang Ren
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View article: Quantitative Evaluation Method for Anomaly Levels of Complex Flight Maneuver Based on Multi-sensor Data
Quantitative Evaluation Method for Anomaly Levels of Complex Flight Maneuver Based on Multi-sensor Data Open
The methods that identify complex flight maneuvers from multi-sensor flight parameter data fusion and conduct automated quantitative evaluations of anomaly levels could play an important role in enhancing flight safety and pilot training. …
View article: Use of ultrasound gel to mitigate risks of skin burns from non-actively cooled mic rowave applicators
Use of ultrasound gel to mitigate risks of skin burns from non-actively cooled mic rowave applicators Open
The purpose of this study is to investigate the potential of using ultrasound gel to mitigate the risks of skin burn at the insertion site during microwave ablation (MWA) using non-actively cooled applicators. Ex vivo experiments in porcin…
View article: Characterization of single‐ and multi‐energy CT performance of an oral dark borosilicate contrast media using a clinical photon‐counting‐detector CT platform
Characterization of single‐ and multi‐energy CT performance of an oral dark borosilicate contrast media using a clinical photon‐counting‐detector CT platform Open
Background The feasibility of oral dark contrast media is under exploration in abdominal computed tomography (CT) applications. One of the experimental contrast media in this class is dark borosilicate contrast media (DBCM), which has a CT…
View article: Technical note: Exploring the detectability of coronary calcification using ultra‐high‐resolution photon‐counting‐detector CT
Technical note: Exploring the detectability of coronary calcification using ultra‐high‐resolution photon‐counting‐detector CT Open
Background Coronary calcification is a strong indicator of coronary artery disease, and patients with a “zero” coronary calcification score have a much lower risk of future cardiac events than those with even small amounts of calcium. Howe…
View article: Establishing a quality assurance program for photon counting detector (PCD) CT: Tips and caveats
Establishing a quality assurance program for photon counting detector (PCD) CT: Tips and caveats Open
Purpose To determine the suitability of a quality assurance (QA) program based on the American College of Radiology's (ACR) CT quality control (QC) manual to fully evaluate the unique capabilities of a clinical photon‐counting‐detector (PC…
View article: Impact of flexible noise control (FNC) image processing parameters on portable chest radiography
Impact of flexible noise control (FNC) image processing parameters on portable chest radiography Open
There is a lack of understanding in the performance of flexible noise control (FNC) processing, which is used in digital radiography on a scanner vendor and has four parameters each involving multiple options. The aim of this study was to …
View article: Framework of metal insertion in the projection domain for image quality optimization in interventional computed tomography
Framework of metal insertion in the projection domain for image quality optimization in interventional computed tomography Open
Purpose: This work aims to develop a framework to accurately and efficiently simulate metallic objects used during interventional oncology (IO) procedures and their artifacts in computed tomography (CT) images of different body regi…
View article: Simultaneous dual‐contrast imaging using energy‐integrating detector multi‐energy CT: An in vivo feasibility study
Simultaneous dual‐contrast imaging using energy‐integrating detector multi‐energy CT: An in vivo feasibility study Open
Purpose To demonstrate the feasibility of simultaneous dual‐contrast imaging in a large animal using a newly developed dual‐source energy‐integrating detector (EID)‐based multi‐energy computed tomography (MECT) system. Methods Two imaging …
View article: Deep learning enabled ultra‐fast‐pitch acquisition in clinical X‐ray computed tomography
Deep learning enabled ultra‐fast‐pitch acquisition in clinical X‐ray computed tomography Open
Objective In X‐raycomputed tomography (CT), many important clinical applications may benefit from a fast acquisition speed. The helical scan is the most widely used acquisition mode in clinical CT, where a fast helical pitch can improve th…
View article: Dual-Contrast Biphasic Liver Imaging With Iodine and Gadolinium Using Photon-Counting Detector Computed Tomography
Dual-Contrast Biphasic Liver Imaging With Iodine and Gadolinium Using Photon-Counting Detector Computed Tomography Open
Purpose The aims of this study were to develop a single-scan dual-contrast protocol for biphasic liver imaging with 2 intravenous contrast agents (iodine and gadolinium) and to evaluate its effectiveness in an exploratory swine study using…
View article: Energy‐integrating‐detector multi‐energy CT: Implementation and a phantom study
Energy‐integrating‐detector multi‐energy CT: Implementation and a phantom study Open
Purpose Multi‐energy computed tomography (MECT) has a great potential to enable many novel clinical applications such as simultaneous multi‐contrast imaging. The purpose of this study was to implement triple‐beam MECT on a traditional ener…
View article: A web-based software platform for efficient and quantitative CT image quality assessment and protocol optimization
A web-based software platform for efficient and quantitative CT image quality assessment and protocol optimization Open
Channelized Hotelling observer (CHO), which has been shown to be well correlated with human observer performance in many clinical CT tasks, has a great potential to become the method of choice for objective image quality assessment. Howeve…
View article: Simultaneous Dual-Contrast Imaging of Small Bowel With Iodine and Bismuth Using Photon-Counting-Detector Computed Tomography
Simultaneous Dual-Contrast Imaging of Small Bowel With Iodine and Bismuth Using Photon-Counting-Detector Computed Tomography Open
Objectives Dual-energy and multienergy computed tomography (DECT/MECT) has the potential to simultaneously visualize two contrast agents in the small bowel: arterial enhancement of iodine in the bowel wall and enteric enhancement of bismut…
View article: Multi-energy CT with triple X-ray beams: a feasibility animal study
Multi-energy CT with triple X-ray beams: a feasibility animal study Open
Energy-integrating-detector (EID)-based triple-beam multi-energy CT (TB-MECT) was recently implemented on a dual-source (DS) CT platform by mounting a z-axis split-filter (0.05 mm Au, 0.6 mm Sn) on one of the two tubes. The purpose of this…
View article: Radiation dose efficiency of multi-energy photon-counting-detector CT for dual-contrast imaging
Radiation dose efficiency of multi-energy photon-counting-detector CT for dual-contrast imaging Open
Compared to traditional multi-scan single-energy CT (SECT), one potential advantage of single-scan multi-energy CT (MECT) proposed for simultaneous imaging of multiple contrast agents is the radiation dose reduction. This phantom study aim…
View article: A new moving target detection algorithm
A new moving target detection algorithm Open
The traditional GMM can easily detect the background as a moving target and is sensitive to the illumination changes. So this paper put forward a moving target detection algorithm combining the improved custom GMM with the five-frame inter…
View article: Short-term Load Forecasting Based on Electricity Price in LSTM in Power Grid
Short-term Load Forecasting Based on Electricity Price in LSTM in Power Grid Open
In the electricity market, accurate short-term load forecasting can ensure the safe and stable operation of the grid, but the real-time fluctuation of electricity price increases the complexity of load changes and increases the difficulty …
View article: A deep learning‐ and partial least square regression‐based model observer for a low‐contrast lesion detection task in CT
A deep learning‐ and partial least square regression‐based model observer for a low‐contrast lesion detection task in CT Open
Purpose This work aims to develop a new framework of image quality assessment using deep learning‐based model observer (DL‐MO) and to validate it in a low‐contrast lesion detection task that involves CT images with patient anatomical backg…
View article: CFAR Detection of High Grazing Angle Sea-Clutter Based on KR Distribution
CFAR Detection of High Grazing Angle Sea-Clutter Based on KR Distribution Open
Constant false alarm rate (CFAR) is a traditional method for radar target detection. A lot of relevant researches assume that the sea clutter obeys the K distribution. However, with the improvement of the radar resolution and the increase …
View article: An Ensemble Model Based on Machine Learning Methods for Short-term Power Load Forecasting
An Ensemble Model Based on Machine Learning Methods for Short-term Power Load Forecasting Open
Given the significant fluctuation of errors for single forecasting model and limitation of linear combined forecasting models, A nonlinear multi-model ensemble method for short-term power load forecasting is proposed. Firstly, the power lo…
View article: Three-material decomposition in multi-energy CT: impact of prior information on noise and bias
Three-material decomposition in multi-energy CT: impact of prior information on noise and bias Open
In order to perform material decomposition for a three-material mixture, dual-energy CT (DECT) has to incorporate an additional condition, typically the prior information related to certain physical constraints such as volume or mass conse…
View article: Correlation between model observers in uniform background and human observer in patient liver background for a low-contrast detection task in CT
Correlation between model observers in uniform background and human observer in patient liver background for a low-contrast detection task in CT Open
Channelized Hotelling observer (CHO) has demonstrated strong correlation with human observer (HO) in both single-slice viewing mode and multi-slice viewing mode in low-contrast detection tasks with uniform background. However, it remains u…
View article: Tutorial on X-ray photon counting detector characterization
Tutorial on X-ray photon counting detector characterization Open
This review can serve as a tutorial for X-ray imaging researchers and investigators to understand, operate, characterize, and optimize photon counting detectors for a variety of applications.
View article: Characterization of continuous and pulsed emission modes of a hybrid micro focus x-ray source for medical imaging applications
Characterization of continuous and pulsed emission modes of a hybrid micro focus x-ray source for medical imaging applications Open
View article: Noise Power Characteristics of a Micro–Computed Tomography System
Noise Power Characteristics of a Micro–Computed Tomography System Open
The noise power properties investigated in this study provide important image quality references for refined cone beam system development, optimization, and operations.
View article: The impact of spectral filtration on image quality in micro‐CT system
The impact of spectral filtration on image quality in micro‐CT system Open
This paper aims to evaluate the impact of spectral filtration on image quality in a microcomputed tomography (micro‐CT) system. A mouse phantom comprising 11 rods for modeling lung, muscle, adipose, and bones was scanned with 17 s and 2 mi…
View article: Low dose high energy x-ray in-line phase sensitive imaging prototype: Investigation of optimal geometric conditions and design parameters
Low dose high energy x-ray in-line phase sensitive imaging prototype: Investigation of optimal geometric conditions and design parameters Open
The objective of this study was to investigate the optimization of a high energy in-line phase sensitive x-ray imaging prototype under different geometric and operating conditions for mammography application. A phase retrieval algorithm ba…
View article: Investigation of spatial resolution characteristics of an in vivo microcomputed tomography system
Investigation of spatial resolution characteristics of an in vivo microcomputed tomography system Open