Results 201 to 210 of about 1,561,159 (250)
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Achromatic Intensity Modulator
Spatial Light Modulators and Applications, 1993The limits of polarization rotation as a means of intensity modulation can be significantly improved using a system employing chiral smectic liquid crystals.
J. E. Stockley +3 more
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Intensity modulated radiotherapy
2012Intensity-modulated radiotherapy (IMRT) is a radiation delivery technique that allows “dose sculpting” to improve target coverage while sparing normal tissues. In an IMRT plan, the number of photons delivered (or “fluence”) varies within a field. Such variability can be used to avoid normal structures with lower radiation tolerance than the cancer and ...
Bridget F. Koontz +2 more
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Medical Physics, 2004
As compared with multi-leaf collimator based intensity modulated radiation therapy (IMRT) techniques, physical modulators have the major advantage of temporally invariant intensity map delivery which makes it more flexible with monitor unit rate, simpler resolution of interrupted treatment and easier implementation and use with respiratory gating ...
Tong, Xu +2 more
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As compared with multi-leaf collimator based intensity modulated radiation therapy (IMRT) techniques, physical modulators have the major advantage of temporally invariant intensity map delivery which makes it more flexible with monitor unit rate, simpler resolution of interrupted treatment and easier implementation and use with respiratory gating ...
Tong, Xu +2 more
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A review of intensity-modulated radiation therapy
Current Oncology Reports, 2008Intensity-modulated radiation therapy (IMRT) is a sophisticated form of three-dimensional treatment planning and delivery. In some situations, IMRT allows more conformal radiation therapy to complex targets within the lung. As problems related to organ motion are increasingly addressed, the use of IMRT in the treatment of lung cancer, particularly in ...
Laurie E, Gaspar, Meisong, Ding
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Perceived Exertion and Stimulus Intensity Modulation
Perceptual and Motor Skills, 1977Perceptual augmentation and reduction were considered contrasting styles of Stimulus Intensity Modulation. Differences in perceived exertion between augmenters and reducers were determined for three cycle ergometer work loads. Subjects were 20 males having similar physiological characteristics.
R J, Robertson +3 more
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1965
In most measurements with the oscilloscope, the electron beam, and thus the spot, is deflected by both pairs of deflection plates in co-ordinates at right angles to each other -the Y- and the X-axes. It is, however, sometimes necessary to make a third quantity, namely time, visible on the fluorescent screen.
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In most measurements with the oscilloscope, the electron beam, and thus the spot, is deflected by both pairs of deflection plates in co-ordinates at right angles to each other -the Y- and the X-axes. It is, however, sometimes necessary to make a third quantity, namely time, visible on the fluorescent screen.
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Dosimetric verification of intensity‐modulated fields
Medical Physics, 1996The optimization of intensity distributions and the delivery of intensity‐modulated treatments with dynamic multi‐leaf collimators (MLC) offer important improvements to three‐dimensional conformal radiotherapy. In this study, a nine‐beam intensity‐modulated prostate plan was generated using the inverse radiotherapy technique.
X, Wang +5 more
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Exploration of tradeoffs in intensity-modulated radiotherapy
Physics in Medicine and Biology, 2005The purpose of this study is to calculate Pareto surfaces in multi-criteria radiation treatment planning and to analyse the dependency of the Pareto surfaces on the objective functions used for the volumes of interest. We develop a linear approach that allows us to calculate truly Pareto optimal treatment plans, and we apply it to explore the tradeoff ...
David, Craft +2 more
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Intensity modulation of cutaneous electrical stimulation
European journal of pain supplements, 2006Chronic pain research is increasingly focused on the neuroplastic mechanisms underlying subjective pain experience. The latter is often measured using reported pain intensity, e.g. using a numeric rating scale (NRS). Evoked Potentials (EPs) reflect the cortical representation of applied stimuli and are experimentally used for observation of neural ...
van der Heide, E.M. +3 more
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2015
Intensity-modulated sensors were defined in Chapter 2 as sensors that detect the variation of the intensity of light associated with the perturbing environment. The general concepts associated with intensity modulation include transmission, reflection, and microbending. However, several other mechanisms that can be used independently (intrinsically) or
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Intensity-modulated sensors were defined in Chapter 2 as sensors that detect the variation of the intensity of light associated with the perturbing environment. The general concepts associated with intensity modulation include transmission, reflection, and microbending. However, several other mechanisms that can be used independently (intrinsically) or
openaire +1 more source