nif_inv:birnlex_2052 http://ontology.neuinfo.org/NIF/DigitalEntities/NIF-Investigation.owl#birnlex_2052 SubClass nif_inv:birnlex_2008 http://ontology.neuinfo.org/NIF/DigitalEntities/NIF-Investigation.owl#birnlex_2008 MRI repetition time Repetition time The time interval between successive initial excitation pulses in one full playout of a pulse sequence. This is also often used in reference to the time it takes to acquire the entire volume being imaged (e.g., the brain, the ventral surface of the brain). SubClass rdfs:label TR rdfs:subClassOf nif_inv:birnlex_2052 http://ontology.neuinfo.org/NIF/DigitalEntities/NIF-Investigation.owl#birnlex_2052 class definition The time interval between successive initial excitation pulses in one full playout of a pulse sequence. This is also often used in reference to the time it takes to acquire the entire volume being imaged (e.g., the brain, the ventral surface of the brain). preferred label TR birn_annot:hasCurationStatus http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#uncurated obo_annot:createdDate 2007-03-09 birn_annot:hasBirnlexCurator http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#Jessica_Turner http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#Bill_Bug InstanceCount 0 obo_annot:synonym Repetition time MRI repetition time RdfType ChildCount 0 obo_annot:tempDefinition The amount of time that exists between successive pulse sequences applied to the same slice. It is delineated by initiating the first RF pulse of the sequence then repeating the same RF pulse at a time t. Variations in the value of TR have an important effect on the control of image contrast characteristics. Short values of TR (< 1000 ms) are common in images exhibiting T1 contrast, and long values of TR (> 1500 ms) are common in images exhibiting T2 contrast. TR is also a major factor in total scan time. obo_annot:modifiedDate February 9, 2009 2007-03-09 owl:versionInfo TODO: class nif_inv:birnlex_2070 http://ontology.neuinfo.org/NIF/DigitalEntities/NIF-Investigation.owl#birnlex_2070 Echo time MRI echo time The time interval between excitation and data acquisition of the center of k-space. This is also referred to as echo time and typically measured in units of milliseconds. (Huettel, Song, & McCarthy, 2004). SubClass rdfs:label TE rdfs:subClassOf nif_inv:birnlex_2052 http://ontology.neuinfo.org/NIF/DigitalEntities/NIF-Investigation.owl#birnlex_2052 class definition The time interval between excitation and data acquisition of the center of k-space. This is also referred to as echo time and typically measured in units of milliseconds. (Huettel, Song, & McCarthy, 2004). preferred label TE birn_annot:hasCurationStatus http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#uncurated obo_annot:createdDate 2007-03-09 birn_annot:hasBirnlexCurator http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#Jessica_Turner http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#Bill_Bug InstanceCount 0 obo_annot:synonym MRI echo time Echo time RdfType ChildCount 0 obo_annot:tempDefinition This is an imaging parameter which helps determine image contrast. It represents the time in milliseconds between the application of the 90degree pulse and the peak of the echo signal in Spin Echo and Inversion Recovery pulse sequences obo_annot:modifiedDate 2007-03-09 class nif_inv:birnlex_2062 http://ontology.neuinfo.org/NIF/DigitalEntities/NIF-Investigation.owl#birnlex_2062 MRI acquitision time The time between the initial pulse and the end of the data acquisition. Note that there may be an additional delay placed at the end of the acquisition to achieve a certain repetition time (TR) SubClass rdfs:label TA rdfs:subClassOf nif_inv:birnlex_2052 http://ontology.neuinfo.org/NIF/DigitalEntities/NIF-Investigation.owl#birnlex_2052 class definition The time between the initial pulse and the end of the data acquisition. Note that there may be an additional delay placed at the end of the acquisition to achieve a certain repetition time (TR) preferred label TA birn_annot:hasCurationStatus http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#uncurated obo_annot:createdDate 2007-03-09 birn_annot:hasBirnlexCurator http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#Jessica_Turner http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#Bill_Bug InstanceCount 0 obo_annot:synonym MRI acquitision time RdfType ChildCount 0 obo_annot:tempDefinition The time the MRI scanner takes to collect an MRI image. obo_annot:modifiedDate 2007-03-09 class rdfs:label Duration rdfs:subClassOf nif_inv:birnlex_2175 http://ontology.neuinfo.org/NIF/DigitalEntities/NIF-Investigation.owl#birnlex_2175 class preferred label Duration birn_annot:hasCurationStatus http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#uncurated obo_annot:createdDate 2007-03-09 birn_annot:hasBirnlexCurator http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#Bill_Bug SuperClass nif_inv:birnlex_2175 http://ontology.neuinfo.org/NIF/DigitalEntities/NIF-Investigation.owl#birnlex_2175 InstanceCount 0 SubClass RdfType rdfs:subClassOf http://ontology.neuinfo.org/NIF/Backend/BIRNLex-OBI-proxy.owl#birnlex_11004 http://ontology.neuinfo.org/NIF/Backend/BIRNLex-OBI-proxy.owl#birnlex_11004 class rdfs:label Temporal characteristic value ChildCount 2 obo_annot:tempDefinition a type of quantitative value measured in units of time. obo_annot:createdDate 2007-03-07 birn_annot:hasCurationStatus http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#uncurated preferred label Temporal characteristic value obo_annot:modifiedDate 2007-03-07 birn_annot:hasBirnlexCurator http://ontology.neuinfo.org/NIF/Backend/BIRNLex_annotation_properties.owl#BIRN_OTF class InstanceCount 0 RdfType ChildCount 3 obo_annot:tempDefinition A type of temporal characteristic value where the time measured is that between the occurance of two events. obo_annot:modifiedDate 2007-03-09 class