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An introduction to the electronic theory of valency by Speakman J

By Speakman J

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Limit the radiation field of view to the area of concern— avoid direct exposure of the unshielded uterus. Radiography involves a less collimated x-ray beam resulting in more scattered radiation in the room. The pelvis should be shielded with lead when performing radiography of other body parts. In pregnancy, radiographic, fluoroscopic, and CT examination of areas of the body that do not expose the uterus to the direct x-ray beam deliver minimal radiation dose to the fetus (53). CT involves a tightly collimated beam with very little scatter radiation in the room.

A more accurate method to estimate glomerular filtration rate from serum creatinine: a new prediction equation. Modification of Diet in Renal Disease Study Group. Ann Intern Med 1999;130:461–470. indd 25 25 33. Cohen MD. Safe use of imaging contrast agents in children. J Am Coll Radiol 2009;6:576–581. 34. Adbujudeh HH, Kosaraju VK, Kaewlai R. Acute adverse reactions to gadobenate dimeglumine and gadobenate dimeglumine: experience with 32659 injections. AJR Am J Roentgenol 2010;194:430–434. 35. Löwe A, Balzer T, Hirt U.

24. 26. LOOKING AT THE BRAIN A few simple principles can be followed to ensure that no neurosurgical emergency is missed, even on a first cursory look at an emergency CT scan at midnight. Midline. The middle of the patient’s brain should be in the middle of the patient’s head and the two sides of the brain should look alike (Figs. 5). While there are important functional asymmetries between the right and left hemispheres, the anatomic differences are subtle and play no role in clinical neuroradiology.

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