Sentences with phrase «radiation with photons»

Conventional radiation with photons gave way to intensity - modulated radiation therapy, or IMRT, in which more precise beams of photons could be moved dozens or hundreds of times with varying intensities, attacking tumors in three dimensions with safer high doses.

Not exact matches

These photons fly uniformly through space from all directions, with an average temperature of 2.7 kelvins (° 455 degrees Fahrenheit), composing a cloud of radiation called the cosmic microwave background (CMB).

In this way, protons avoid indiscriminately mutilating a high proportion of healthy cells along with cancerous cells as photons do in other forms of radiation.

The grains are light enough to be set spinning by collisions with photons and fast - moving atoms, and because some are charged this would cause them to emit microwave radiation.

The high - energy cosmic neutrinos detected by IceCube are believed to originate from cosmic - ray interactions with matter (proton - proton interactions); from cosmic - ray interactions with radiation (proton - photon interactions); or from the decay or destruction of heavy, invisible «dark matter.»

Matter grows so hot that it interacts with radiation in unfamiliar ways, and photons of radiation can crash into each other and create new matter.

This study, «Practice patterns of photon and proton pediatric image guided radiation treatment: Results from an International Pediatric Research Consortium,» evaluates the use of IGRT in treatment planning for pediatric cancers in an international consortium comprised of seven institutions using either photon or proton therapy with dedicated pediatric expertise.

As it was created nearly 14 billion years ago, this light — which exists now as weak microwave radiation and is thus named the cosmic microwave background (CMB)-- permeates the entire cosmos, filling it with detectable photons.

According to standard physics, cosmic rays created outside our galaxy with energies greater than about 1020 electronvolts (eV) should not reach Earth at those energies: as they travel over such vast regions of space they should lose energy because of collisions with photons of the cosmic microwave background (CMB), the radiation left over from the big bang.

Therefore, although the ALMA reflectors look like giant satellite receptors, for a photon with submillimetric wavelength (a particle carrying electromagnetic radiation), they are almost perfect and very precise reflective surfaces.

Material characterizations using neutrons and synchrotron radiation GEMS: User - platform for research with photons and neutrons Forschungsplattform

The singer will be using CBD oil in combination with photon radiation therapy to battle cancer which metastasized in a bone in her lower back.

The radiation oncology service boasts a sophisticated linear accelerator (Siemens Primus linear accelerator with 6MV photon and 6 - 21 MeV electron capabilities.

We are the ONLY center in the world that provides «high tech and high touch» linear accelerator generated radiation therapy with both photon and electron beam radiation, Trilogy based stereotactic radiosurgery (SRS) and the robotically controlled, computer controlled, Cyberknife stereotactic radiosurgery.

Vibrational modes in molecules with three or more atoms (H2O, CO2, O3, N2O, CH4, CFCs, HFCs...) include bending motions that are easier to excite and so will absorb and emit lower energy photons which co-incide with the infrared radiation that the Earth emits.

That makes some intuitive sense to me (as allowed by optical thickness, photons moving out of a region in proportion to concentration; constant photon concentration gradient can be sustained with constant T ^ 4 gradient, etc.), though then I have to correct something I said earlier — within the region where T ^ 4 varies linearly (over optical distance), the radiation will be anisotropic.

Add to that the plausibility of some human - caused warming (CO2 does interact with photons of outgoing LW radiation, and all else being equal this should lead to some increase of energy within the lower atmosphere).

It would still pick up heat from direct conduction, as Gary Moran has insisted; and it would not be correct to say that there would be NO interaction with radiation (another point by Tom Vonk): if there are lower - energy bands, they will be used by the gas to absorb photons.

Conservation of the photon gas momentum in its interaction with the gases of the atmosphere means that the famous 50 % up 50 % down isotropy in radiation of the bulk is wrong.

Thus, a considerable part of the visible radiation is either absorbed or reflected, the interaction of vegetation with the photons from the visible region making the surface of the lands cooler and greener.

In fact, the troposphere is mostly heated by convection from the surface with radiation having a net cooling effect, so the atmosphere as a whole emits more photons to space than it gains from the ground.