PSYC 3307 Lecture Notes - Lecture 9: International Standard Book Number, Signal 1, Hounsfield Scale
25 Jul 2020
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Integration of the patient"s functional characteristics (obtained from neuropsychological assessment) with structural characteristics (obtained from neuroimaging studies. Neuropsychologists are in an ideal position to determine whether or not cognitive deficits correspond with an imaging finding . Began with roentgen"s (1895) discovery of the x-ray . Discovered that high-energy radiation can pass through living tissue. Absorbance of x-rays varies with tissue density . It is very rare in science that an invention or discovery comes "out of the blue". The concept of reconstructing a cross section from projection data was understood in many fields of physics long before medical ct became a practical possibility. There was not exactly a race to achieve it instead a number of experimental arrangements were constructed which "nearly achieved ct", many of which, after the event, can be cited as relevant to its history. The work towards the first emi scanner was conducted in secret, mindful of the great rewards success would bring.
