A5050695282- Medical Imaging Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Advanced MRI Techniques and Applications
- Advanced X-ray and CT Imaging
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Radiation Dose and Imaging
- Pelvic and Acetabular Injuries
- Advanced NMR Techniques and Applications
- Radioactive contamination and transfer
- Orthopaedic implants and arthroplasty
- Advanced Radiotherapy Techniques
- Advanced Semiconductor Detectors and Materials
- Kidney Stones and Urolithiasis Treatments
- Radiomics and Machine Learning in Medical Imaging
- Hip disorders and treatments
Children's Hospital Colorado
2024
University of Colorado Denver
2024
VA Eastern Colorado Health Care System
2023
University of Colorado Colorado Springs
2009
University of California, Davis
2003-2008
University of California Davis Medical Center
2007
MicroPET II is a second-generation animal PET scanner designed for high-resolution imaging of small laboratory rodents. The system consists 90 scintillation detector modules arranged in three contiguous axial rings with ring diameter 16.0 cm and an length 4.9 cm. Each module 14 × array lutetium oxyorthosilicate (LSO) crystals coupled to multi-channel photomultiplier tube (MC-PMT) through coherent optical fibre bundle. LSO crystal element measures 0.975 mm cross section by 12.5 length. A...
The development of dedicated small animal PET (positron emission tomography) scanners has led to significantly higher spatial resolution and comparable sensitivity clinical scanners. However, it is not clear whether we are approaching the fundamental limit resolution. This work aims understand what currently limiting during data formation collection how apply that knowledge obtain best possible for without sacrificing sensitivity. Monte Carlo simulations were performed interactions a 511 keV...
Excellent spatial resolution is a requirement for preclinical PET imaging. In order to achieve of significantly better than one millimeter, an appealing possibility employ direct detector materials, such as cadmium telluride (CdTe). Prototype thin orthogonal strip detectors have been developed testing. They dimensions 20 mm by and are 0.5 thick, strips pitch on side 2.5 the other. Results presented energy (3% at 511 keV), intrinsic position (equal pitch), timing (3 ns FWHM in coincidence...
Abstract Radioembolization using Yttrium‐90 ( 90 Y) microspheres is widely used to treat primary and metastatic liver tumors. The present work provides minimum practice guidelines for establishing supporting such a program. Medical physicists play key role in patient staff safety during these procedures. Products currently available are identified their properties suppliers summarized. Appropriateness use the domain of treating physician. Patient up starts with pre‐treatment imaging. First,...
MicroPET II is a second-generation microPET scanner dedicated to high resolution PET imaging of small animals. The system consists 90 scintillation detector modules arranged in 3-ring configuration with radius 16.0 cm and ail axial extent 4.9 cm. Each module 14/spl times/14 array lutetium oxyorthosilicate crystals coupled multi-channel photomultiplier tube (Hamamatsu H7546) through coherent optical fiber bundle. Printed circuit boards charge-division readout scheme were used decode the 196...
A dedicated breast PET/CT system is being constructed at our institution. In this work, we characterize aspects of the performance PET component, and investigate accuracy image registration for CT systems. Energy resolution was determined on a per-crystal basis from segmented flood image. Reconstructed spatial using phantom consisting four point sources range positions. miniature Derenzo also imaged visual inspection resolution. Data were reconstructed with both FBP MAP. fiducial makers to...
Estimation of the tracer uptake in a region interest (ROI) is an important task emission tomography. ROI quantification essential for measuring clinical factors such as tumor activity, growth rate, and efficacy therapeutic interventions. Accuracy significantly affected by image reconstruction algorithms. In penalized maximum-likelihood (PML) algorithm, regularization parameter controls resolution noise tradeoff and, hence, affects quantification. To obtain optimum performance quantification,...
In this paper we present experimental results obtained with an orthogonal strip CdTe detector designed for application to small animal PET. The was provide timing resolution acceptable PET, depth of interaction information and spatial superior scintillator based detectors. A sample 20times20 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> area 0.5 thickness patterned strips 0.5-mm pitch on one face. a PET ring the 511 keV gamma-rays...
Abstract The Periacetabular Osteotomy is a technically demanding procedure that requires precise intraoperative evaluation of pelvic anatomy. Fluoroscopic images pose radiation risk to operating room staff, scrubbed personnel, and the patient. Most commonly, Standard Fluoroscope with an Image Intensifier used. Our institution recently implemented novel Flat Panel Detector. purpose this study was compare dosage accuracy between two fluoroscopes. A retrospective review consecutive series...
Despite increasing interest in reducing radiation doses during endoscopic stone surgery, there is conflicting evidence as to whether percutaneous nephrolithotomy (PCNL) positioning (prone or supine) impacts radiation. We observed clinically that a patient placed prone on gel rolls had higher than expected with intraoperative CT imaging and were visible the coaxial imaging. hypothesized directly increase doses.
Estimation of region interest (ROI) activity is an important task in emission tomography. ROI quantification essential for measuring clinical factors such as tumor activity, growth rate, and the efficacy therapeutic interventions. Accuracy significantly affected by image reconstruction algorithm. In penalized maximum-likelihood (PML) algorithm, regularization parameter controls resolution noise tradeoff and, hence, affects quantification. To optimize performance quantification, it desirable...
The first day of the Molecular Imaging Symposium (MI‐1) will focus on technology aspects molecular, functional, and small animal imaging. Modalities which be discussed include micro‐CT, micro‐PET, high resolution MRI for presentation micro‐CT an introduction to basic requirements scanner hardware, examples images biological applications in is useful, radiation dose undergoing also discussed. Micro‐CT techniques require longer acquisition times than human scanners, thus maintaining a viable...