989 Artículos relativos a Fantasmas de Imagen

• RBE values for fast neutrons in connection with estimates of the radiation burden in space.
  Publicado en Life Sci Space Res
• A study of the biological effectiveness of high-energy electrons at ultra-high dose rates using dry eggs of Artemia.
  Publicado en Radiat Res
• Irradiation of bio-objects aboard the Cosmos 690 biosatellite.
  Publicado en Life Sci Space Res
• Eine Axicon-Linse zum Fokussieren von Ultraschallfeldern.
  Publicado en Ultraschall Med
• Messung der Blutgeschwindigkeit, des Blut-Volumenstromes und der Aderquerschnittsfläche nach der integralen Ultraschall-Dopplermethode--Vergleich und Synthese zweier Lösungen.
  Publicado en Ultraschall Med
• In-vitro- und In-vivo-Darstellungen von Punktionsinstrumenten im sonographischen Echtzeitbild. 1. Mitteilung: Punktionsnadeln.
  Publicado en Ultraschall Med
• In-vitro- und In-vivo-Darstellungen von Punktionsinstrumenten im sonographischen Echtzeitbild. 2. Mitteilung: Plastikinstrumente.
  Publicado en Ultraschall Med
• Vergleichende Untersuchungen mit verschiedenen echomammographischen Verfahren.
  Publicado en Ultraschall Med
• Calculation and prescription of dose for total body irradiation.
  Publicado en Int J Radiat Oncol Biol Phys
• LET-distributions and doses of HZE radiation components at near-Earth orbits.
  Publicado en Adv Space Res
• Whole-body CT scanner for ultraprecise, ultraaccurate determination of bone density.
  Publicado en J Comput Assist Tomogr
• Habitability design of European spacecraft Hermes--ergonomic aspects.
  Publicado en Acta Astronaut
• Ultrasonic transmission velocity and single photon absorptiometric measurement of metacarpal bone strength: an in vitro study in the horse.
  Publicado en Equine Vet J Suppl
• Photon beam dosimetry at a blocked beam edge using diffusion approximation.
  Publicado en Phys Med Biol
• Absorbed dose reduced by sliced exposure using sector selector system with rotational panoramic radiography.
  Publicado en Bull Tokyo Dent Coll
• Absorbed doses modified by exposure settings with rotational panoramic radiography.
  Publicado en Bull Tokyo Dent Coll
• 133Xe for the in vivo X-ray fluorescence measurement of platinum.
  Publicado en Phys Med Biol
• Scatter correction for three-dimensional PET based on an analytic model dependent on source and attenuating object.
  Publicado en Phys Med Biol
• Attenuation correction for three-dimensional PET using uncollimated flood-source transmission measurements.
  Publicado en Phys Med Biol
• An analytical reconstruction algorithm for multifocal converging-beam SPECT.
  Publicado en Phys Med Biol
• Quantitative imaging of holmium-166 with an Anger camera.
  Publicado en Phys Med Biol
• A new scintillator detector system for the quality assurance of 60Co and high-energy therapy machines.
  Publicado en Phys Med Biol
• The design and performance characteristics of a multileaf collimator.
  Publicado en Phys Med Biol
• Photon backscattering tissue characterization by energy dispersive spectroscopy evaluations.
  Publicado en Phys Med Biol
• A phantom for the testing and calibration of near infra-red spectrometers.
  Publicado en Phys Med Biol
• Iterative concurrent reconstruction algorithms for emission computed tomography.
  Publicado en Phys Med Biol
• Characteristics of 60Co gamma-ray SPR (scatter-primary ratio), SF (scatter factor), beta (dose-kerma ratio), and dmax (depth of maximum dose).
  Publicado en Phys Med Biol
• Aeq and other factors in a 60Co beam for a spherical or cylindrical minimal phantom and for an ionization chamber with a known A(wall) correction factor.
  Publicado en Phys Med Biol
• Investigation of the imaging properties of an x-ray film scanner.
  Publicado en Phys Med Biol
• An estimation of noise levels in HMPAO RCBF SPECT images using simulation and phantom data; comparison with results obtained from repeated normal controls.
  Publicado en Phys Med Biol
• Noise properties of the EM algorithm: II. Monte Carlo simulations.
  Publicado en Phys Med Biol
• Noise and signal decoupling in maximum-likelihood reconstructions and Metz filters for PET brain images.
  Publicado en Phys Med Biol
• Quantitation in SPECT using an effective model of the scattering.
  Publicado en Phys Med Biol
• Implementation of an accelerated iterative algorithm for cone-beam SPECT.
  Publicado en Phys Med Biol
• Figures of merit for comparing reconstruction algorithms with a volume-imaging PET scanner.
  Publicado en Phys Med Biol
• 3D reconstruction for a multi-ring PET scanner by single-slice rebinning and axial deconvolution.
  Publicado en Phys Med Biol
• Use of 3D reconstruction to correct for patient motion in SPECT.
  Publicado en Phys Med Biol
• A 3D model of non-uniform attenuation and detector response for efficient iterative reconstruction in SPECT.
  Publicado en Phys Med Biol
• The importance and implementation of accurate 3D compensation methods for quantitative SPECT.
  Publicado en Phys Med Biol
• Implementation of Tuy's cone-beam inversion formula.
  Publicado en Phys Med Biol
• Three-dimensional reconstruction from cone-beam data in O(N3 log N) time.
  Publicado en Phys Med Biol
• Cone-beam tomography with discrete data sets.
  Publicado en Phys Med Biol
• The cardiofocal collimator: a variable-focus collimator for cardiac SPECT.
  Publicado en Phys Med Biol
• Pinhole collimation for ultra-high-resolution, small-field-of-view SPECT.
  Publicado en Phys Med Biol
• A convolution-subtraction scatter correction method for 3D PET.
  Publicado en Phys Med Biol
• Simulation studies on a pseudo-three-dimensional reconstruction algorithm for volume imaging in multi-ring PET.
  Publicado en Phys Med Biol
• The performance of the single-slice rebinning technique for imaging the human striatum as evaluated by phantom studies.
  Publicado en Phys Med Biol
• Evaluation of task-oriented performance of several fully 3D PET reconstruction algorithms.
  Publicado en Phys Med Biol
• A methodology for testing for statistically significant differences between fully 3D PET reconstruction algorithms.
  Publicado en Phys Med Biol
• Three-dimensional image reconstruction for PET by multi-slice rebinning and axial image filtering.
  Publicado en Phys Med Biol
• A method of using noise as a test pattern for determining image enhancement filters.
  Publicado en Phys Med Biol
• A filtering technique to compensate for detector response in converging-beam SPECT reconstruction.
  Publicado en Phys Med Biol
• Quantitative reconstruction for myocardial perfusion SPECT: an efficient approach by depth-dependent deconvolution and matrix rotation.
  Publicado en Phys Med Biol
• Accuracy of dose calculation methods for retracted tissue compensators.
  Publicado en Phys Med Biol
• A phantom and a procedure to obtain variable-object-contrast test images in gamma camera emission computed tomography (SPECT).
  Publicado en Phys Med Biol
• Position-dependent scatter response functions: will they make a difference in SPECT conducted with homogeneous cylindrical phantoms?.
  Publicado en Phys Med Biol
• Improvements in the calibration of 109Cd K x-ray fluorescence systems for measuring bone lead in vivo.
  Publicado en Phys Med Biol
• Optimizing the planning of intensity-modulated radiotherapy.
  Publicado en Phys Med Biol
• A fundamental study on hyper-thermal neutrons for neutron capture therapy.
  Publicado en Phys Med Biol
• The Monte Carlo modelling of in vivo x-ray fluorescence measurement of lead in tissue.
  Publicado en Phys Med Biol
• Accelerated EM reconstruction in total-body PET: potential for improving tumour detectability.
  Publicado en Phys Med Biol
• A phantom for quantitative ultrasound of trabecular bone.
  Publicado en Phys Med Biol
• A Monte Carlo study of grid performance in diagnostic radiology: task-dependent optimization for digital imaging.
  Publicado en Phys Med Biol
• Cone-beam x-ray microtomography of small specimens.
  Publicado en Phys Med Biol
• A method of simultaneous dual-radionuclide cardiac imaging with technetium 99m and thallium 201. I: Analysis of interradionuclide crossover and validation in phantoms.
  Publicado en J Nucl Cardiol
• Evaluation of a breast biopsy phantom for learning freehand ultrasound-guided biopsy of the liver.
  Publicado en Acad Radiol
• Evaluating and validating two methods for estimating brain structure volumes: tessellation and simple pixel counting.
  Publicado en Neuroimage
• Fluxes of galactic iron nuclei and associated HZE secondaries, and resulting radiation doses, in the brain of an astronaut.
  Publicado en Adv Space Res
• Experimental simulation of proton space radiation environments: a dosimetric perspective.
  Publicado en Adv Space Res
• Realistic computerized human phantoms.
  Publicado en Adv Space Res
• Anatomical models for space radiation applications: an overview.
  Publicado en Adv Space Res
• Overview on experience to date on human exposure to space radiations.
  Publicado en Adv Space Res
• Relative biological effectiveness and microdosimetry of a mixed energy field of protons up to 200 MeV.
  Publicado en Adv Space Res
• Development of real-time CT fluoroscopy.
  Publicado en Nippon Igaku Hoshasen Gakkai Zasshi
• Study of X-ray filter and peak kilovoltage in Fuji Computed Radiography in regard to the detection of simulated pulmonary nodules.
  Publicado en Nippon Igaku Hoshasen Gakkai Zasshi
• 201Tl, 99mTc-PYP dual SPECT.
  Publicado en Nippon Rinsho
• Secondary radiations in spacecraft shieldings.
  Publicado en Radiat Meas
• Physicists in mammography--a historical perspective.
  Publicado en Med Phys
• An investigation of the effect of finite system resolution and photon noise on the bias and precision of dynamic cardiac SPECT parameters.
  Publicado en Med Phys
• Evaluation of digitally reconstructed radiographs (DRRs) used for clinical radiotherapy: a phantom study.
  Publicado en Med Phys
• Magnetic-resonance imaging techniques for detection of elasticity variation.
  Publicado en Med Phys
• T1 mapping from spin echo and stimulated echoes.
  Publicado en Med Phys
• Photoelectrons facilitate autoradiography for 192Ir remote afterloaders.
  Publicado en Med Phys
• Determination of the thermal neutron flux in a fast neutron beam by use of a boron-coated ionization chamber.
  Publicado en Med Phys
• The influence of scatter on the design of optimized intensity modulations.
  Publicado en Med Phys
• Modeling transmission and scatter for photon beam attenuators.
  Publicado en Med Phys
• Verification of rotational conformation radiotherapy using megavoltage CT scanning.
  Publicado en Nippon Igaku Hoshasen Gakkai Zasshi
• Computed radiography with photostimulable phosphor in oral and maxillofacial radiology.
  Publicado en Oral Surg Oral Med Oral Pathol Oral Radiol Endod
• Accuracy and precision of time-averaged flow as measured by nontriggered 2D phase-contrast MR angiography, a phantom evaluation.
  Publicado en Magn Reson Imaging
• Evaluation of solitary pulmonary nodules with dynamic contrast-enhanced MR imaging--a promising technique.
  Publicado en Magn Reson Imaging
• Magnetic resonance acquisition to determine the lumen length of a tortuous phantom aorta.
  Publicado en J Endovasc Surg
• Quality assessment of magnetic resonance stereotactic localization for Gamma Knife radiosurgery.
  Publicado en Stereotact Funct Neurosurg
• Stereotactic localization using magnetic resonance imaging.
  Publicado en Stereotact Funct Neurosurg
• A euristic approach to the volume reconstruction of arteriovenous malformations from biplane angiography.
  Publicado en Stereotact Funct Neurosurg
• Quantitation of articular cartilage using magnetic resonance imaging and three-dimensional reconstruction.
  Publicado en J Orthop Res
• Perceptibility of defects in an aluminum test object: a comparison of the RVG-S and first generation VIXA systems with and without added niobium filtration.
  Publicado en Dentomaxillofac Radiol
• A home-made phantom for learning ultrasound-guided invasive techniques.
  Publicado en Australas Radiol
• Development of an MRI-compatible needle insertion manipulator for stereotactic neurosurgery.
  Publicado en J Image Guid Surg
• Method for correcting magnetic resonance image distortion for frame-based stereotactic surgery, with preliminary results.
  Publicado en J Image Guid Surg
• Frameless patient registration using ultrasonic imaging: a preliminary study.
  Publicado en J Image Guid Surg