Webmaster if you are the owner of copyrighted animation that is not credited and would like to receive credit and a link. Must check the copyright restrictions with the original author. If artist name appears next to the animation or on the animation then you Eddie Bernice Johnson added that ITER scientists are confident it is now possible to actually build a full-scale test reactor that produces far more energy than it. Eric Swallwell said, ITER is designed to produce at least 10 times the energy it consumes, and Texas Rep. During a congressional hearing on ITER in 2014, California Rep. Medical web template banner flyer post for social media template for sale ads. It appears lawmakers might have believed the same. Images created by Best Animations can not be edited, can not have the copyright mark removed, can only be used for sharing along with a link pointing to. Search from thousands of royalty-free Animated Gif stock images and video.
The audiometer delivers sounds at various, exactly measured frequencies high pitch and. Gifs can be shared on personal non commercial pages along with a link to . Today these tests are performed with a machine called an audiometer. We like to hand select the best gifs found on the internets.The tiny gifs can be as old as 1999.īest Animations is a collection of animated gifs found on the web and original exclusive gifs made by us. We make a lot of gifs here, especially all the Holidays and Birthday card gifs. The best way to share is to Copy and Paste the link using the share tools. To Share out the gifs click on the gif and use the share tools. On mobile and touchscreens, press down on the gif for a couple of seconds and the save option will appear. In contrast a SPECT scan, which is an emission scan, would tell us where a pharmaceutical is distributing throughout the body – thus providing functional information.On desktop right click the animation and select save. A CT scan would work very similarly, with respect to image acquisition and reconstruction, except the photons reaching the detector would be coming from an x ray generating source at the other side of the patient (a transmission scan).Of course we can recall that a CT scan, a transmission scan, would give us information about the attenuation properties of the object being imaged – thus providing anatomical information. This gif specifically illustrates a SPECT acquisition, where the information about the biodistribution of a radioactive tracer is being emitted from within the patient (through photon emission) and virtually registered by the rotating detectors (an emission scan). In CT and SPECT imaging, a sinogram is generated by rotating detectors around a patient, and storing the detected projection profiles at each angle in the sinogram, as depicted in the gif above. reaction explosion government nothing to see here leslie nielson. explosion bomb nuke nuclear bomb nuclear explosion. The main steps involved in a filtered back projection image acquisition include:įorward projection (data acquired and forward projected into sinogram space)ĭata is filtered (the filter in filtered back projection)įiltered sinograms are back projected into image space (the back project in filtered back projection) explosion bomb nuke nuclear bomb nuclear explosion. While iterative reconstruction is more complex, it has advantages in that it is capable of dealing with noise and other practical issues by incorporating their expected impact/uncertainty into the reconstruction process.This website shows animations of FBP reconstruction. Now that computing power is getting more accessible, many vendors are incorporating iterative reconstruction techniques into their systems. Article Types Nuclear Medicine and Biology publishes Research Articles, Reviews, Short Communications, and Protocols. It is much faster, simpler, reproducible, and linear (performs uniformly across environments). They run by repeating (ITERATING) two distinct steps: (1) Expected projections are calculated by forward projecting data (using system matrix), and is based on activity distribution estimation from the previous iteration, and (2) the current image estimate is compared to the raw acquisition and updated so as to maximize the likelihood it is the “correct” image estimation.įBP has been the reconstruction algorithm traditionally used for medical imaging. Iterative reconstruction: these algorithms involve a feedback process that permits sequential adjustments of an estimated image so that its virtual acquisition corresponds to the raw acquisition. Physics at school - HTML5 (Physics Animations/Simulations) Mechanics Gravitational field Mechanical vibrations and waves Molecular Physics and Thermodynamics Electrostatics Electric current Semiconductors Electric current in liquids Current conduction in gases and vacuum Magnetic field Alternating current. The mathematics of FBP are based on the central slice theorem ( link-Wikipedia ), but are not discussed here. There are two main types of mathematical algorithms for image reconstruction: analytic reconstruction (filtered back projection) and iterative reconstruction.Īnalytic reconstruction: on this website we focus on an image reconstruction technique called filtered back projection (FBP).
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