Errors in the assessment of the efficacy of MRI pulse sequences

John C. Gore; Christopher F. Pope; Henry Dirk Sostman

doi:10.1016/0730-725X(86)91066-0

Errors in the assessment of the efficacy of MRI pulse sequences

John C. Gore, Christopher F. Pope, Henry Dirk Sostman

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The effects of the echo delay TE on contrast in saturation recovery MRI have been analyzed both theoretically and with experimental brain scans. It is demonstrated that the influence of the TE values offered as minimal values by all major current equipment manufacturers is not insignificant, but produces a degree of T₂ weighting that considerably degrades the useful contrast that could be obtained from T₁ weighted studies. Consequently, conclusions drawn about the relative performances of T₁ and T₂ weighted sequences may be incorrect if based on saturation recovery images obtained with inappropriate echo times.

Original language	English (US)
Pages (from-to)	251-255
Number of pages	5
Journal	Magnetic Resonance Imaging
Volume	4
Issue number	3
DOIs	https://doi.org/10.1016/0730-725X(86)91066-0
State	Published - Jan 1 1986

Keywords

MRI
Pulse sequence
Relaxation times
Spin echo

ASJC Scopus subject areas

Condensed Matter Physics
Radiology Nuclear Medicine and imaging
Structural Biology
Clinical Biochemistry
Biophysics

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10.1016/0730-725X(86)91066-0

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abstract = "The effects of the echo delay TE on contrast in saturation recovery MRI have been analyzed both theoretically and with experimental brain scans. It is demonstrated that the influence of the TE values offered as minimal values by all major current equipment manufacturers is not insignificant, but produces a degree of T2 weighting that considerably degrades the useful contrast that could be obtained from T1 weighted studies. Consequently, conclusions drawn about the relative performances of T1 and T2 weighted sequences may be incorrect if based on saturation recovery images obtained with inappropriate echo times.",

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AU - Pope, Christopher F.

AU - Sostman, Henry Dirk

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N2 - The effects of the echo delay TE on contrast in saturation recovery MRI have been analyzed both theoretically and with experimental brain scans. It is demonstrated that the influence of the TE values offered as minimal values by all major current equipment manufacturers is not insignificant, but produces a degree of T2 weighting that considerably degrades the useful contrast that could be obtained from T1 weighted studies. Consequently, conclusions drawn about the relative performances of T1 and T2 weighted sequences may be incorrect if based on saturation recovery images obtained with inappropriate echo times.

AB - The effects of the echo delay TE on contrast in saturation recovery MRI have been analyzed both theoretically and with experimental brain scans. It is demonstrated that the influence of the TE values offered as minimal values by all major current equipment manufacturers is not insignificant, but produces a degree of T2 weighting that considerably degrades the useful contrast that could be obtained from T1 weighted studies. Consequently, conclusions drawn about the relative performances of T1 and T2 weighted sequences may be incorrect if based on saturation recovery images obtained with inappropriate echo times.

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KW - Pulse sequence

KW - Relaxation times

KW - Spin echo

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Errors in the assessment of the efficacy of MRI pulse sequences

Abstract

Keywords

ASJC Scopus subject areas

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