AIMC Journal:
Medical physics

Showing 751 to 759 of 759 articles

A new automated quantification algorithm for the detection and evaluation of focal liver lesions with contrast-enhanced ultrasound.

Medical physics Jul 1, 2015
PURPOSE: Detect and classify focal liver lesions (FLLs) from contrast-enhanced ultrasound (CEUS) imaging by means of an automated quantification algorithm.
Ultrasonography ROC Curve Liver Neoplasms Adult Male Middle Aged Area Under Curve Video Recording Image Interpretation, Computer-Assisted Wavelet Analysis Support Vector Machine Contrast Media Liver Humans Female Aged Young Adult
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Commissioning of a proton gantry equipped with dual x-ray imagers and a robotic patient positioner, and evaluation of the accuracy of single-beam image registration for this system.

Medical physics Jun 1, 2015
PURPOSE: To check the accuracy of a gantry equipped with dual x-ray imagers and a robotic patient positioner for proton radiotherapy, and to evaluate the accuracy and feasibility of single-beam registration using the robotic positioner.
Proton Therapy Robotics Rotation Patient Positioning Humans Tomography, X-Ray Computed Image Processing, Computer-Assisted
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Validating FMEA output against incident learning data: A study in stereotactic body radiation therapy.

Medical physics Jun 1, 2015
PURPOSE: Though failure mode and effects analysis (FMEA) is becoming more widely adopted for risk assessment in radiation therapy, to our knowledge, its output has never been validated against data on errors that actually occur. The objective of this...
Humans Machine Learning Radiosurgery Equipment Failure Analysis Databases, Factual Risk Assessment Radiotherapy Planning, Computer-Assisted
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Robotic real-time translational and rotational head motion correction during frameless stereotactic radiosurgery.

Medical physics Jun 1, 2015
PURPOSE: To develop a control system to correct both translational and rotational head motion deviations in real-time during frameless stereotactic radiosurgery (SRS).
Humans Algorithms Movement Head Radiotherapy, Computer-Assisted Radiosurgery Phantoms, Imaging Time Factors Robotics Rotation
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A method for volumetric imaging in radiotherapy using single x-ray projection.

Medical physics May 1, 2015
PURPOSE: It is an intriguing problem to generate an instantaneous volumetric image based on the corresponding x-ray projection. The purpose of this study is to develop a new method to achieve this goal via a sparse learning approach.
Four-Dimensional Computed Tomography Models, Biological Motion Respiration X-Rays Time Factors Diaphragm Lung Neoplasms Humans Principal Component Analysis Radiotherapy Machine Learning Phantoms, Imaging Lung
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Neural-network based autocontouring algorithm for intrafractional lung-tumor tracking using Linac-MR.

Medical physics May 1, 2015
PURPOSE: To develop a neural-network based autocontouring algorithm for intrafractional lung-tumor tracking using Linac-MR and evaluate its performance with phantom and in-vivo MR images.
Motion Phantoms, Imaging Particle Accelerators Lung Carcinoma, Non-Small-Cell Lung Magnetic Resonance Imaging Humans Neural Networks, Computer
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Automatic learning-based beam angle selection for thoracic IMRT.

Medical physics Apr 1, 2015
PURPOSE: The treatment of thoracic cancer using external beam radiation requires an optimal selection of the radiation beam directions to ensure effective coverage of the target volume and to avoid unnecessary treatment of normal healthy tissues. Int...
Regression Analysis Radiotherapy Planning, Computer-Assisted Datasets as Topic Algorithms Tomography, X-Ray Computed Lung Neoplasms Thorax Pattern Recognition, Automated Humans Radiotherapy Dosage Machine Learning Radiotherapy, Intensity-Modulated
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Models for predicting objective function weights in prostate cancer IMRT.

Medical physics Apr 1, 2015
PURPOSE: To develop and evaluate the clinical applicability of advanced machine learning models that simultaneously predict multiple optimization objective function weights from patient geometry for intensity-modulated radiation therapy of prostate c...
Radiotherapy Planning, Computer-Assisted Datasets as Topic Humans Radiotherapy Dosage Machine Learning Retrospective Studies Radiotherapy, Intensity-Modulated Urinary Bladder Male Prostate Photons Rectum Logistic Models Organs at Risk Prostatic Neoplasms
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Comparison between target margins derived from 4DCT scans and real-time tumor motion tracking: insights from lung tumor patients treated with robotic radiosurgery.

Medical physics Mar 1, 2015
PURPOSE: A unique capability of the CyberKnife system is dynamic target tracking. However, not all patients are eligible for this approach. Rather, their tumors are tracked statically using the vertebral column for alignment. When using static tracki...
Radiosurgery Movement Uncertainty Humans Four-Dimensional Computed Tomography Lung Neoplasms Aged Robotics Time Factors Radiotherapy Planning, Computer-Assisted
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