A5073580480- Advanced Radiotherapy Techniques
- Medical Imaging Techniques and Applications
- Radiation Therapy and Dosimetry
- Advanced Data Storage Technologies
- Advanced X-ray and CT Imaging
- Radiation Dose and Imaging
- Management of metastatic bone disease
- Distributed and Parallel Computing Systems
- Parallel Computing and Optimization Techniques
- Distributed systems and fault tolerance
- Effects of Radiation Exposure
- Color Science and Applications
- Cloud Computing and Resource Management
- Peroxisome Proliferator-Activated Receptors
- Radiation Effects in Electronics
- Numerical Methods and Algorithms
- Simulation Techniques and Applications
- Digital Filter Design and Implementation
- Voice and Speech Disorders
- Polyomavirus and related diseases
- Real-Time Systems Scheduling
- Thyroid Disorders and Treatments
- Advanced Numerical Analysis Techniques
- Software Reliability and Analysis Research
- Medical Imaging and Analysis
The University of Texas Southwestern Medical Center
1985-2023
Southwestern Medical Center
2014-2020
Radiation Oncology Associates
2013
Michigan Technological University
1994-1995
Clemson University
1987-1993
Boeing (United States)
1970
The present study utilized a cultured myocardial cell model to evaluate the relationship between release of arachidonate from membrane phospholipids, and progression injury during ATP depletion. High-energy phosphate depletion was induced by incubating neonatal rat cells with various combinations metabolic inhibitors (deoxyglucose, oligomycin, cyanide, iodoacetate). Phospholipid degradation assessed radiolabeled phospholipids. In this model, current demonstrates that (a) display...
Total body irradiation is an important part of the conditioning regimens frequently used to prepare patients for allogeneic hematopoietic stem cell transplantation (SCT). Volumetric-modulated arc therapy enabled total (VMAT-TBI), alternative conventional TBI (cTBI), a novel radiotherapy treatment technique that has been implemented and investigated in our institution. The purpose this study (1) report six-year clinical experience terms planning strategy delivery time (2) evaluate outcomes...
Spine SBRT involves the delivery of very high doses radiation to targets adjacent spinal cord and is most commonly delivered in a single fraction. Highly conformal planning accurate such plans imperative for successful treatment without catastrophic adverse effects. End–to‐end testing an important practice evaluating entire process from simulation through delivery. We performed end‐to‐end set representative spine planned using four different systems (TPSs) evaluate various capabilities each....
An indexed rotational immobilization system was developed for supine total body irradiation (TBI). Treatment plans had multi-isocentric volumetric modulated arc therapy (VMAT) beams to the upper and parallel-opposed fields lower body, with a 12 Gy prescription dose >90% of mean lung ∼8 Gy. In end-to-end test, point measurements <10% error. Compared conventional TBI, VMAT-based TBI technique increased by ∼1.0–1.5 decreased Overall treatment time ∼1.5 h, similar TBI.
The selection of an optimal checkpointing strategy has most often been considered in the transaction processing environment where systems are allowed unlimited repairs. In this maximizes time spent normal operating state and consequently rate processing. This paper seeks a checkpoint which probability critical-task completion on system with limited These can undergo failure repair only until exceeds specified threshold, at is deemed to have failed completely. For such systems, model derived...
Online adaptive radiotherapy (ART) involves the development of adaptable treatment plans that consider patient anatomical data obtained right prior to administration, facilitated by cone-beam computed tomography guided (CTgART) and magnetic resonance image-guided (MRgART). To ensure accuracy these plans, it is crucial conduct calculation-based checks independent verification volumetric dose distribution, as measurement-based are not practical within online workflows. However, absence...
article Free AccessA Markovian framework for digital halftoning Authors: Robert Geist Clemson Univ., Clemson, SC SCView Profile , Reynolds Darrell Suggs Authors Info & Claims ACM Transactions on GraphicsVolume 12Issue 2April 1993 pp 136–159https://doi.org/10.1145/151280.151281Published:01 April 1993Publication History 33citation815DownloadsMetricsTotal Citations33Total Downloads815Last 12 Months30Last 6 weeks9 Get Citation AlertsNew Alert added!This alert has been successfully added and will...
Abstract The aim of this study was to report a single‐institution experience and commissioning data for Elekta VersaHD linear accelerators (LINACs) photon beams in the Eclipse treatment planning system (TPS). Two LINACs equipped with 160‐leaf collimators were commissioned. For each energy, percent‐depth‐dose (PDD) curves, beam profiles, output factors, leaf transmission factors dosimetric gaps (DLGs) acquired accordance AAPM task group reports No. 45 106 vendor‐supplied documents. measured...
A variety of disk scheduling algorithms, including some newly defined ones, are compared both in simulation and tests on a real machine running UNIX* System V. In the system tests, first-come first-served (FCFS), shortest seek time first (SSTF), standard V algorithm (SVS) all seen to yield relatively poor mean waiting performance when VSCAN(0.2) modifications thereof suggested by Coffman. Nevertheless, each is excel along particular dimension. The adequacy open, Poisson arrival models...
Background: Pre-treatment liver tumor localization remains a challenging task for radiation therapy, mostly due to the limited contrast against normal tissues, and respiration-induced motion. Recently, we developed biomechanical modeling-based, deformation-driven cone-beam CT estimation technique (Bio-CBCT), which achieved substantially improved accuracy on low-contrast localization. However, of Bio-CBCT is still affected by tissue around caudal boundary, reduces boundary condition that fed...
The classical techniques of separation variables and eigenfunction expansions apply to a wide variety boundary value problems in partial differential equations. Analogous procedures exist for certain difference equations that arise from discretization the coefficients associated with are defined by finite sums involving eigenfunctions unknown function. Under conditions specified next section, discretized form Poisson's equation satisfy tridiagonal system linear algebraic which easily solved.
Objectives. The purpose of this study is to present data from the clinical commissioning an Xstrahl 150 x-ray unit used for superficial radiotherapy,Methods. Commissioning tasks included vendor acceptance tests, timer reproducibility, linearity and end-effect measurements, half-value layer (HVL) inverse square law verification, head-leakage beam output calibration. In addition, percent depth dose (PDD) curves were determined different combinations filter/kV settings applicators. Automated...
A variety of disk scheduling algorithms, including some newly defined ones, are compared both in simulation and tests on a real machine running UNIX * System V. In the system tests, first-come first-served (FCFS), shortest seek time first (SSTF), standard V algorithm (SVS) all seen to yield relatively poor mean waiting performance when VSCAN(0.2) modifications thereof suggested by Coffman. Nevertheless, each is excel along particular dimension. The adequacy open, Poisson arrival models...
A scheme for disk subsystem performance enhancement that is based on (virtual) cylinder remapping proposed. natural workload a real system measured, and statistical tests are used to determine accesses appropriately modeled by first order Markov chain. Maximum likelihood estimators of the model parameters in simulated annealing algorithm find permutation cylinders substantially reduces expected seek distance. This then installed tested under stochastically generated from model. The proposed...
Purpose: To compare volumetric modulated arc therapy (VMAT) treatment plans calculated with Eclipse 10 (RapidArc, Varian Medical Systems) and Pinnacle 9.2 (SmartArc, Philips Healthcare) to those computed an independent verification system utilizing a DICOM-RT framework Mobius3D (M3D 1.1, Mobius Systems, LP). Methods: (M3D) utilizes standardized machine data, supplemented by custom scaled measured depth dose curves, output factors off-axis ratios, create institution specific beam models as...
We present a method for developing multiple processor workload characterization based on actual system level traces of user and kernel accesses. trace single executing an N-processor workload. then perform static analysis the produce individual process characterizations. These characterizations can be used to build input workloads models systems. This provides using real drive simulations without requiring that similarly configured machine exist. Additionally, wealth information obtained...
Purpose: Mobius3D/MobiusFX (M3D/MFX), a commercial DICOM-RT based plan and delivery verification system, was used to compare calculated delivered volumetric modulated arc therapy (VMAT) dose distributions using TrueBeam log files (TrajectoryLogs). Methods: M3D/MFX utilizes measured linac commissioning data generate institution specific beam models for evaluating planned distributions. 30 RapidArc prostate plans head neck SmartArc were in this study. For every plan, CT images, contoured...
Purpose: Single fraction spine SBRT involves very high doses delivered to targets adjacent the spinal cord. Highly conformal planning and accurate delivery of such plans is imperative for successful treatment without catastrophic adverse affects. End end testing an important practice evaluating entire process from simulation through delivery. We performed end‐to‐end a set representative planned using different systems (TPSs) systems. Methods: An anthropomorphic E2E phantom (IMT, Troy,NY)...