A5042572328- Radiation Dose and Imaging
- Advanced X-ray and CT Imaging
- Medical Imaging Techniques and Applications
- Radiology practices and education
- Digital Radiography and Breast Imaging
- Radiomics and Machine Learning in Medical Imaging
- Renal and Vascular Pathologies
- Aortic aneurysm repair treatments
- Power Line Communications and Noise
- Integrated Circuits and Semiconductor Failure Analysis
- Particle Accelerators and Free-Electron Lasers
- MRI in cancer diagnosis
- Radioactivity and Radon Measurements
- Aortic Disease and Treatment Approaches
- Advanced MRI Techniques and Applications
- Radioactive Decay and Measurement Techniques
- Lung Cancer Diagnosis and Treatment
- Breast Cancer Treatment Studies
- Reconstructive Surgery and Microvascular Techniques
- Computability, Logic, AI Algorithms
- COVID-19 diagnosis using AI
- Spinal Fractures and Fixation Techniques
- Ion-surface interactions and analysis
- Advanced Radiotherapy Techniques
- Effects of Radiation Exposure
University of Wisconsin–Madison
2011-2021
Highland Community College - Illinois
2012-2019
Madison Group (United States)
2005
UW Health University Hospital
1999
The rapid development and complexity of new x-ray computed tomography (CT) technologies the need for evidence-based optimization image quality with respect to radiation contrast media dose call an updated approach towards CT performance evaluation.This report offers testing guidelines systems enhanced focus on operational including iterative reconstructions automatic exposure control (AEC) techniques.The was developed based a comprehensive review best methods practices in scientific...
To evaluate the clinical usefulness of volumetric analysis at nonenhanced computed tomography (CT) as sole method with which to follow up endovascular abdominal aortic aneurysm repair (EVAR) and identify endoleaks causing more than 2% increase from previous volume determination.The study had institutional review board approval. Images were reviewed retrospectively in a HIPAA-compliant manner for 230 CT studies 70 patients (11 women, 59 men; mean age, 74 years) who underwent EVAR. The...
The VetMousetrap, a novel device that allows computed tomography (CT) of awake cats and provides clinically supportive environment, is described. Ten normal were used to test the for ambient internal oxygen, carbon dioxide levels, temperature. Twenty-two imaged using 16-multislice helical CT unit evaluate dose-equivalent protocols. Two different X-ray tube potentials (kV), 80 120, two pitches, 0.562 1.75, evaluated. signal intensity pulmonary parenchyma (SIlung), background (SIbackgr),...
This article explains a method for creating CT protocols wide range of patient body sizes and clinical indications, using detailed tube current information from small set commonly used protocols. Analytical expressions were created relating technical acquisition parameters which can be to create new on given scanner or customize one another. Plots mA as function size specific anatomical regions generated identify the output needs patients single master protocol. Tube data obtained DICOM...
To determine the effects of iterative reconstruction (IR) and high-frequency kernels on quantitative computed tomography (qCT) density measures at reduced X-ray dose.The COPDGene 2 Phantom (CTP 698, The Laboratory, Salem, NY) with four embedded lung mimicking foam densities (12lb, 20lb, 4lb), as well water, air, acrylic reference inserts, was imaged using a GE 64 slice CT750 HD scanner in helical mode current-time products ranging from 12 to 100 mAs. raw acquired data were reconstructed...
The purpose of this paper is to describe our experience with the AAPM Medical Physics Practice Guideline 1.a: “CT Protocol Management and Review Guideline”. Specifically, we will share how institution's quality management system addresses suggestions within practice report. We feel needed as it was beyond scope guideline provide specific details on fulfilling individual guidelines. Our hope that other institutions be able emulate some practices article would encourage types centers (e.g.,...
To determine the impact of constrained reconstruction techniques on quantitative CT (qCT) lung parenchyma and airways for low x-ray radiation dose.Measurement small with qCT remains a challenge, especially dose protocols. Images COPDGene quality assurance phantom (CTP698, The Phantom Laboratory, Salem, NY) were obtained using GE discovery CT750 HD scanner helical scans at dose-equivalents ranging from 1 to 4.12 mSv (12-100 mA s current-time product). Other parameters 40 mm collimation, 0.984...
As the COVID-19 pandemic impacts global populations, computed tomography (CT) lung imaging is being used in many countries to help manage patient care as well rapidly identify potentially useful quantitative CT biomarkers. Quantitative applications, typically based on computer vision modeling and artificial intelligence algorithms, include potential for better methods assess extent severity, assist with differential diagnosis of versus other respiratory conditions, predict disease...
When patient anatomy is positioned away from a CT scanner's isocenter, scans of limited diagnostic value may result. Yet in some cases, positioning far isocenter unavoidable. This study examines the effect posi-tion and reconstruction algorithm on image resolution achieved by scanner operating high (HR) scan mode which incorporates focal spot deflection acquires an increased number projections per rotation. Images metal bead contained phantom were acquired GE CT750 HD with multiple...
Safe radiography in scoliosis management is based on a sound knowledge of 1) the radiographic imaging process, 2) degree risk to patient from radiation exposure, and 3) requirements both evaluate follow patients with spine deformity. This paper current review subject work done at authors' centers. It includes recommendations for reducing while maintaining necessary diagnostic information.
While computed tomography (CT) is now commonly used and considered to be clinically valuable, significant DNA double-strand breaks (γ-H2AX foci) in white blood cells from adult pediatric CT patients have been frequently reported. In this study determine whether γ-H2AX foci X-ray-induced naked damage are suppressed by administration of the PrC-210 radioprotector, human samples were irradiated a scanner at 50–150 mGy with or without PrC-210, scored. was also studied, protective efficacy...
Patient size-specific dose estimate (SSDE) calculations require knowledge of a patient's size. Errors in patient size propagate through SSDE calculations. AAPM Reports 204 and 220 recommend that magnification correction be applied to surrogates extracted from CT localizer radiographs. This technical note presents novel approach for such correction.In our model-based correction, we assume the cross sections are elliptical with minor major axes defined using anterior-posterior (AP) lateral...
Two patients developed skin ulcers secondary to high doses of diagnostic‐energy x rays received during localization procedures as part brachytherapy treatments. Both were morbidly obese and diabetic. The obesity led the delivery estimated 83 Gy in one case 29 other attempts produce readable images on radiographs. This report discusses factors leading injuries, progression injuries over time, variables involved with aim preventing future mishaps. greatest contribution large dose was need,...
Purpose: The modulation transfer function (MTF) is frequently used to assess high contrast spatial resolution for routine quality assurance in CT imaging. High reconstruction kernels provide new challenges MTF estimation. purpose of this work demonstrate the effect number saturation on Methods: A small bead contained a CATPHAN 600 phantom was imaged at two different slice thicknesses, 2.5 mm and 5.0 mm, GE 750 HD scanner using an Bone Plus algorithm scan mode. resulting images were 2‐D point...