{"title":"灌注成像","authors":"J. Dyke","doi":"10.1201/9780429118715-16","DOIUrl":null,"url":null,"abstract":"What is Perfusion • Perfusion describes the amount of blood delivered to the capillary beds of a block of tissue in a certain time period. • Transport of oxygen, glucose and other nutrients from blood to tissue. • Occurs at the capillary level (radius ~ 5 μm) • It is typically characterized by three quantities: cerebral blood volume (CBV), cerebral blood flow (CBF), and mean transit time (MTT). The typical imaging voxel contains several thousand capillaries. • CBF and MTT measurements necessarily rely on techniques sensitive to motion (for instance, bolus tracking techniques), CBV may be measured with other methods (for instance, in a steady state).","PeriodicalId":306167,"journal":{"name":"Functional Neuroimaging","volume":"24 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Perfusion Imaging\",\"authors\":\"J. Dyke\",\"doi\":\"10.1201/9780429118715-16\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"What is Perfusion • Perfusion describes the amount of blood delivered to the capillary beds of a block of tissue in a certain time period. • Transport of oxygen, glucose and other nutrients from blood to tissue. • Occurs at the capillary level (radius ~ 5 μm) • It is typically characterized by three quantities: cerebral blood volume (CBV), cerebral blood flow (CBF), and mean transit time (MTT). The typical imaging voxel contains several thousand capillaries. • CBF and MTT measurements necessarily rely on techniques sensitive to motion (for instance, bolus tracking techniques), CBV may be measured with other methods (for instance, in a steady state).\",\"PeriodicalId\":306167,\"journal\":{\"name\":\"Functional Neuroimaging\",\"volume\":\"24 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-04-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Functional Neuroimaging\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1201/9780429118715-16\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Functional Neuroimaging","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1201/9780429118715-16","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
What is Perfusion • Perfusion describes the amount of blood delivered to the capillary beds of a block of tissue in a certain time period. • Transport of oxygen, glucose and other nutrients from blood to tissue. • Occurs at the capillary level (radius ~ 5 μm) • It is typically characterized by three quantities: cerebral blood volume (CBV), cerebral blood flow (CBF), and mean transit time (MTT). The typical imaging voxel contains several thousand capillaries. • CBF and MTT measurements necessarily rely on techniques sensitive to motion (for instance, bolus tracking techniques), CBV may be measured with other methods (for instance, in a steady state).