The use of SPAMM to assess spatial distortion due to static field inhomogeneity in dental MRI

R. R. Bridcut; Thomas William Redpath; Crawford F Gray; Roger T Staff

doi:10.1088/0031-9155/46/5/302

The use of SPAMM to assess spatial distortion due to static field inhomogeneity in dental MRI

R. R. Bridcut, Thomas William Redpath, Crawford F Gray, Roger T Staff

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

10 Citations (Scopus)

Abstract

In planning placement of dental implants using MRI, a SPAMM (spatial modulation of magnetization) magnetization preparation sequence was incorporated into a spin-echo imaging sequence. A phantom was imaged with a ferromagnetic object attached. Spatial distortion due to deviations in Larmor frequency was detected by a deviation of SPAMM lines. Both SPAMM line deviation and interline spacing were found to agree with a DeltaB(0) map generated from phase images. Imaging of a volunteer with and without typically used metallic implants positioned in a template showed SPAMM line deviations to correlate with expected deviations in vivo. SPAMM lines showed possible distortion due to chemical shift in the bone marrow and the presence of titanium implants to be insignificant. SPAMM may thus be used to provide a qualitative estimate of the accuracy of the MRI image when planning dental implants.

Original language	English
Pages (from-to)	1357-1367
Number of pages	10
Journal	Physics in Medicine and Biology
Volume	46
Issue number	5
DOIs	https://doi.org/10.1088/0031-9155/46/5/302
Publication status	Published - 2001

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10.1088/0031-9155/46/5/302

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title = "The use of SPAMM to assess spatial distortion due to static field inhomogeneity in dental MRI",

abstract = "In planning placement of dental implants using MRI, a SPAMM (spatial modulation of magnetization) magnetization preparation sequence was incorporated into a spin-echo imaging sequence. A phantom was imaged with a ferromagnetic object attached. Spatial distortion due to deviations in Larmor frequency was detected by a deviation of SPAMM lines. Both SPAMM line deviation and interline spacing were found to agree with a DeltaB(0) map generated from phase images. Imaging of a volunteer with and without typically used metallic implants positioned in a template showed SPAMM line deviations to correlate with expected deviations in vivo. SPAMM lines showed possible distortion due to chemical shift in the bone marrow and the presence of titanium implants to be insignificant. SPAMM may thus be used to provide a qualitative estimate of the accuracy of the MRI image when planning dental implants.",

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T1 - The use of SPAMM to assess spatial distortion due to static field inhomogeneity in dental MRI

AU - Bridcut, R. R.

AU - Redpath, Thomas William

AU - Gray, Crawford F

AU - Staff, Roger T

PY - 2001

Y1 - 2001

N2 - In planning placement of dental implants using MRI, a SPAMM (spatial modulation of magnetization) magnetization preparation sequence was incorporated into a spin-echo imaging sequence. A phantom was imaged with a ferromagnetic object attached. Spatial distortion due to deviations in Larmor frequency was detected by a deviation of SPAMM lines. Both SPAMM line deviation and interline spacing were found to agree with a DeltaB(0) map generated from phase images. Imaging of a volunteer with and without typically used metallic implants positioned in a template showed SPAMM line deviations to correlate with expected deviations in vivo. SPAMM lines showed possible distortion due to chemical shift in the bone marrow and the presence of titanium implants to be insignificant. SPAMM may thus be used to provide a qualitative estimate of the accuracy of the MRI image when planning dental implants.

AB - In planning placement of dental implants using MRI, a SPAMM (spatial modulation of magnetization) magnetization preparation sequence was incorporated into a spin-echo imaging sequence. A phantom was imaged with a ferromagnetic object attached. Spatial distortion due to deviations in Larmor frequency was detected by a deviation of SPAMM lines. Both SPAMM line deviation and interline spacing were found to agree with a DeltaB(0) map generated from phase images. Imaging of a volunteer with and without typically used metallic implants positioned in a template showed SPAMM line deviations to correlate with expected deviations in vivo. SPAMM lines showed possible distortion due to chemical shift in the bone marrow and the presence of titanium implants to be insignificant. SPAMM may thus be used to provide a qualitative estimate of the accuracy of the MRI image when planning dental implants.

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DO - 10.1088/0031-9155/46/5/302

M3 - Article

SN - 0031-9155

VL - 46

SP - 1357

EP - 1367

JO - Physics in Medicine and Biology

JF - Physics in Medicine and Biology

IS - 5

ER -

The use of SPAMM to assess spatial distortion due to static field inhomogeneity in dental MRI

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