Measurement of NMR relaxation times using the minimum number of scans

G. Johnson; I. E. Ormerod; P. S. Tofts; D. Barnes; E. P. du Boulay

Measurement of NMR relaxation times using the minimum number of scans

G. Johnson, I. E. Ormerod, P. S. Tofts, D. Barnes, E. P. du Boulay

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1 Citation (Scopus)

Abstract

NMR relaxation time measurements derived from a set of three multi-slice sequences (which can examine the whole brain in 30 min) have been investigated. T1 and T2 values are 5% and 20% too short, respectively. Noise in the measurements was less than 2%. Temporal instability was negligible. Spatial non-uniformity was 1% (T1) and 3% (T2) within a single slice but 4% (T1) and 14% (T2) from slice to slice. Variations in cerebral tissue measurements have also been investigated: T1 varies by 6% and T2 by 12% over a population of normal controls. There can be significant patient-patient and topographical variations.

Original language	English
Pages (from-to)	496-499
Number of pages	4
Journal	Acta Radiologica Supplementum
Volume	369
Publication status	Published - 1986

Access to Document

http://www.ncbi.nlm.nih.gov/pubmed/2980539

Cite this

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title = "Measurement of NMR relaxation times using the minimum number of scans",

abstract = "NMR relaxation time measurements derived from a set of three multi-slice sequences (which can examine the whole brain in 30 min) have been investigated. T1 and T2 values are 5% and 20% too short, respectively. Noise in the measurements was less than 2%. Temporal instability was negligible. Spatial non-uniformity was 1% (T1) and 3% (T2) within a single slice but 4% (T1) and 14% (T2) from slice to slice. Variations in cerebral tissue measurements have also been investigated: T1 varies by 6% and T2 by 12% over a population of normal controls. There can be significant patient-patient and topographical variations.",

author = "G. Johnson and Ormerod, {I. E.} and Tofts, {P. S.} and D. Barnes and {du Boulay}, {E. P.}",

year = "1986",

language = "English",

volume = "369",

pages = "496--499",

journal = "Acta Radiologica Supplementum",

issn = "0365-5954",

publisher = "Blackwell Publishing",

}

TY - JOUR

T1 - Measurement of NMR relaxation times using the minimum number of scans

AU - Johnson, G.

AU - Ormerod, I. E.

AU - Tofts, P. S.

AU - Barnes, D.

AU - du Boulay, E. P.

PY - 1986

Y1 - 1986

N2 - NMR relaxation time measurements derived from a set of three multi-slice sequences (which can examine the whole brain in 30 min) have been investigated. T1 and T2 values are 5% and 20% too short, respectively. Noise in the measurements was less than 2%. Temporal instability was negligible. Spatial non-uniformity was 1% (T1) and 3% (T2) within a single slice but 4% (T1) and 14% (T2) from slice to slice. Variations in cerebral tissue measurements have also been investigated: T1 varies by 6% and T2 by 12% over a population of normal controls. There can be significant patient-patient and topographical variations.

AB - NMR relaxation time measurements derived from a set of three multi-slice sequences (which can examine the whole brain in 30 min) have been investigated. T1 and T2 values are 5% and 20% too short, respectively. Noise in the measurements was less than 2%. Temporal instability was negligible. Spatial non-uniformity was 1% (T1) and 3% (T2) within a single slice but 4% (T1) and 14% (T2) from slice to slice. Variations in cerebral tissue measurements have also been investigated: T1 varies by 6% and T2 by 12% over a population of normal controls. There can be significant patient-patient and topographical variations.

M3 - Article

VL - 369

SP - 496

EP - 499

JO - Acta Radiologica Supplementum

JF - Acta Radiologica Supplementum

SN - 0365-5954

ER -