caa a22 4500 397594070 CHVBK 20180308164947.0 cr unu---uuuuu 161202e19961101xx s 000 0 eng 10.1093/oxfordjournals.rpd.a031852 doi 0144-8420 pii (NATIONALLICENCE)oxford-10.1093/oxfordjournals.rpd.a031852 Frackowiak R.S.J. Functional Brain Imaging [Elektronische Daten] [R.S.J. Frackowiak] Major advances in computing and mathematics,especially the back-projection algorithms introduced for reconstructing tomographic data obtained by non-invasive imaging, have led to new opportunities for the study of the structure, function and structure-function relationships of the human brain. Functional neuro-imaging methods fall, broadly, into two classes. Those methods that provide information about synaptic activity and those that provide information of a chemical or neurochemical nature. The former methods usually depend on some form of perfusion mapping because of the tight coupling between local glucose metabolism and blood flow in the brain at rest and at times of altered synaptic activity. The latter methods depend on identification of a chemical species of interest by using an appropriate radioligand, or by using the intrinsic magnetic properties of a compound. Radiation Protection Dosimetry Radiation Protection Dosimetry Oxford University Press 68/1-2(1996-11-01), 55-61 0144-8420 68:1-2<55 1996 68 rpd https://doi.org/10.1093/oxfordjournals.rpd.a031852 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/oxfordjournals.rpd.a031852 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Frackowiak R.S.J. NATIONALLICENCE 773 0- Radiation Protection Dosimetry Oxford University Press 68/1-2(1996-11-01), 55-61 0144-8420 68:1-2<55 1996 68 rpd Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford