Localisation in PET images: direct fitting of the intercommissural (AC-PC) line.

摘要: Summary: A technique is described for estimating the po­ sition of intercommisural line (AC-PC line) directly from landmarks on positron emission tomographic (PET) images, namely ventral aspects anterior and posterior corpus callosum, thalamus, occipital pole. The relationship this estimate to true AC-PC line, fitted through centres poste­ rior commissures, showed minimal vertical angular displacement when measured magnetic resonance im­ aging (MRI) scans. Using regression analysis, ease reliability fitting these points was found be high. This derived valWith increasing spatial temporal resolu­ tion tomography tech­ niques, neurophysiologic al questions formulated in terms functional anatomy can answered with greater precision. Differences local or genera­ lised metabolic activity other variables may by comparing brain two different states. These differences only be­ come apparent large numbers scans many subjects are pooled. Furthermore, characterising pathological groups not valid unless they demonstrated consistently a number patients.