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10 kHz microsecond pulsed x-ray generator utilising and hot-cathode triode with variable durations for biomedical radiography

, : 10 kHz microsecond pulsed x-ray generator utilising and hot-cathode triode with variable durations for biomedical radiography. Medical & Biological Engineering & Computing 32(3): 295-301

A 10 kHz pulsed X-ray generator utilising a hot-cathode triode in conjunction with a new type of grid control device for controlling X-ray duration is described. The energy-storage condenser was charged up to 70 kV by a power supply, and the electric charges in the condenser was discharged to the X-ray tube repetitively by the grid control device. The maximum values of the grid voltage (negative value), the tube voltage, and the tube current were -1.5 kV, 70 kV, and 0.4 A, respectively. The duration of the flash X-ray pulse was primarily determined by the time constant of the grid control device and the cut-off voltage of thermoelectrons. The X-ray duration was controlled within a region of less than 1 ms; the X-ray intensity with a pulse width of 0.27 ms, a charged voltage of 70 kV, and a peak tube current of 0.4 A was 0.92 mu-C kg-1 at 0.5 m per pulse. The maximum repetition rate was about 10 kHz, and the size of the focal spot was about 3.5 times 3.5 mm.


PMID: 7934253

Other references

Avias J., 1972: Teaching of hydrogeology (and more generally, water science and techniques) at the universities of Montpellier. Tech Sci

Anikandrov, B.V., 1968: Transpleural removal of an intrathoracic goiter combined with routine strumectomy. Khirurgiia 44(12): 104-106

Gessier, F.; Preuss, I.; Yin, H.; Rosenkilde, M.M.; Laurent, S.; Endres, R.; Chen, Y.A.; Marsilje, T.H.; Seuwen, K.; Nguyen, D.G.; Sailer, A.W., 2014: Identification and characterization of small molecule modulators of the Epstein-Barr virus-induced gene 2 (EBI2) receptor. Oxysterols have recently been identified as natural ligands for a G protein-coupled receptor called EBI2 (aka GPR183) ( Nature 2011 , 475 , 524 ; 519 ). EBI2 is highly expressed in immune cells ( J. Biol. Chem. 2006 , 281 , 13199 ), and its activa...

Dreier W.; Preusser E.; Gruendel M., 1992: The regulation of the activity of soluble starch synthase in spinach leaves by a calcium calmodulin dependent protein kinase. Soluble starch synthase from spinach leaves can use ADPG and UDPG for chain elongation in the presence of an appropriate primer (glycogen, amylopectin). Whereas calcium ions alone or in combination with calmodulin (CaM) insignificantly reduce the...

Chung, K.; Choi, Y.B.; Moon, S., 2003: Toward efficient medication error reduction: error-reducing information management systems. Hospitals and other health-care providers today are being pressed more than ever to use technologies for reducing medical errors. Particularly, medication errors are likely to increase fast as Americans age. This paper intends to provide a startin...

Lemosquet, Y.; Lys, M., 1971: Attribution au Bachkirien superieur de la serie de lOued el Hamar Djebel Bechar, Sud-Oranais, Algerie. Cr hebd Seanc Acad Sci Paris, 272D 3001-3004

Lakke, J.P.; Go, K.G., 1968: A simple method to determine patency of ventriculo-atrial shunts in children with hydrocephalus. Neurochirurgia 11(5): 210-216

Coticchia, J.M.; Lessler, M.A.; Ellison, E.C.; Carey, L.C., 1983: Mitochondrial dysfunction induced by pancreatitis-associated ascitic fluid. Acute hemorrhagic pancreatitis (AHP) involves multiple organ failure probably caused by the toxic factor(s) released in pancreatitis-associated ascitic fluid (PAAF). We found that PAAF interferes with hepatic mitochondrial respiration resulting in...

Moog, R.; Mueller, N., 1998: Technical aspects and performance in collecting peripheral blood progenitor cells. The combination of effective mobilization protocols and efficient use of apheresis systems has led to a rapid growth of peripheral blood progenitor cell (PBPC) transplantation. The specifications for these procedures are changing towards more auto...

Der Z.A.; Lees A.C.; McLaughlin K.L.; Shumway R.H., 1992: Deconvolution of a short period teleseismic and regional time series. Pages 156-188 1992