![]() Sharma, Suhansar Jit Singh, Tajinder Singh, Doordarshi Singh, Amrit Dhaliwal, A S Thick target total bremsstrahlung spectra of lead compounds in the photon energy region 1-10 keV by 90Sr beta particles. The reason for these differences is discussed. The maximum difference between the values of ZPEA,eff, and ZPI,eff occurs at 30 keV and the significant difference of 2 to 33% for the energy region 5-100 keV for all drugs. The energy dependence ZPEA,eff, ZPI,eff and Nel is shown graphically. The ZPEA,eff, ZPI,eff and Nel values have been found to change with energy and composition of the narcotic drugs. M.Įffective atomic numbers for photon energy absorption ZPEA,eff, photon interaction ZPI,eff and for electron density Nel, have been calculated by a direct method in the photon-energy region from 1 keV to 20 MeV for narcotic drugs, such as Heroin (H), Cocaine (CO), Caffeine (CA), Tetrahydrocannabinol (THC), Cannabinol (CBD), Tetrahydrocannabivarin (THCV). Studies on effective atomic numbers for photon energy absorption and electron density of some narcotic drugs in the energy range 1 keV-20 MeV Effects of nuclear line emission on the continuum and of higher energy electron bremsstrahlung are considered to explain the spectral hardening. The results show that the spectral shape varies from flare to flare and the spectra harden in energies above about 400 keV. The flares were observed with a hard X-ray and a gamma-ray spectrometers on board the Hinotori satellite. Solar flare photon energy spectra in the 20 keV to 7 MeV range are derived from the Apr. Observations of solar flare photon energy spectra from 20 keV to 7 MeV We conclude that the use of an energy window set on the photopeak of 284 keV and the multi-pinhole collimator may permit I-131 imaging for a preclinical CZT-SPECT system that does not have the ability to acquire images using the 364 keV photons. Furthermore, the uptake of NaI-131 to the thyroid gland for the two mice was clearly identified in the 3D-SPECT image fused with the X-ray CT image. However, a good linear correlation between SPECT values and the level of I-131 radioactivity was observed. The measured spatial resolution was relatively poor (~1.9 mm for full width at half maximum and ~3.9 mm for full width at tenth maximum). Although higher counts occurred at the peripheral region of the reconstructed images due to the collimator penetration by the 364 keV photons, the shape of the small line sources could be well visualized. Small line sources and two mice, one of each of two types, that were injected with NaI-131 were scanned. An energy window for I-131 imaging was set to a photopeak of 284 keV with a low abundance compared with 364 keV photons. The imaging system used was a commercially available preclinical SPECT instrument with CZT detectors that was equipped with multi-pinhole collimators and was accompanied by a CT imager. The aim of this study was to investigate the possibility of imaging I-131 using its 284 keV photons instead of its 364 keV photons in a small animal SPECT imaging system dedicated to the detection of low-medium- energy photons (below 300 keV). Since that principal gamma ray has the relatively high energy of 364 keV, small animal single- photon emission computed tomography (SPECT) imaging systems may be required to possess the ability to image such higher energy photons. Iodine-131 is widely used for radionuclide therapy because of its β-particle and for diagnostic imaging employing its principal gamma ray. ![]() Kojima, Akihiro Gotoh, Kumiko Shimamoto, Masako Hasegawa, Koki Okada, Seiji Thus, complete solutions are available to choose the best way of processing your films in combination with STRUCTURIX chemicals and equipment.Iodine-131 imaging using 284 keV photons with a small animal CZT-SPECT system dedicated to low-medium- energy photon detection. GE Measurement & Control provides the full STRUCTURIX Film Systems product line. Depending on the place, situation and application, processing of the industrial X-rays films is carried out by manual or automatic processing. For all of your requirement needs, GE has a STRUCTURIX film with the right characteristics and packaging.Īfter being X-rayed, radiographic film needs to be processed before examining the film results. GE offers a full range of STRUCTURIX radiographic films from ultrafine grain to high speed, in all standard sheet sizes and on rolls. STRUCTURIX’ reputation for excellence is the result of GE’s continuous striving for the highest product quality. The STRUCTURIX radiographic film product family builds on two critical facets of advanced film technology: high quality images, and rugged performance.
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