MRI of the human eye using magnetization transfer contrast enhancement

M. J. Lizak, M. B. Datiles, A. H. Aletras, Peter F Kador, R. S. Balaban

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

PURPOSE. To determine the feasibility of using magnetization transfer contrast-enhanced magnetic resonance imaging (MRI) to track cataractous lens changes. METHODS. A fast spin-echo sequence was modified to include a magnetization transfer contrast (MTC) preparation pulse train. This consisted of twenty 8.5-msec sinc pulses, 1200 Hz upfield from the water resonance and 1.2-Hz power. The MTC preparation pulse was followed by acquisition through fast spin-echo imaging. The imaging parameters were number of excitations (NEX) = 1, echo time (TE) = 14 msec, recovery time (TR) = 2 sec, echo train length of eight echos, and a matrix size of 256 x 160. To reduce motion artifacts, the volunteers were asked to fixate on a blinking LED. Normal and MTC-enhanced images were acquired from normal volunteers and volunteers with nuclear or cortical cataracts. RESULTS. The eye was adequately imaged, with few motion artifacts appearing. The lens was well resolved, despite the short T2. The cornea and ciliary body were also clearly visible. In the lens, resolution of the epithelium and cortex were enhanced with MTC. In addition, contrast-to-noise ratios were measured for each image. Examination of the contrast-to-noise ratio confirmed that MTC increased the contrast between the nucleus and cortex. Unenhanced MRIs showed significant differences between the cortex of normal volunteers and volunteers with cataracts. MTC-enhanced images improved the sensitivity to changes in the nucleus. CONCLUSIONS. In this preliminary study, we were able to use MTC-enhanced MRI to obtain high-contrast images of the human lens. Regular and enhanced MRIs detected statistically significant differences between normal and cataractous lenses.

Original languageEnglish (US)
Pages (from-to)3878-3881
Number of pages4
JournalInvestigative Ophthalmology and Visual Science
Volume41
Issue number12
StatePublished - Nov 16 2000

Fingerprint

Lenses
Magnetic Resonance Imaging
Volunteers
Artifacts
Cataract
Noise
Healthy Volunteers
Blinking
Ciliary Body
Cornea
Epithelium
Water

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Cite this

Lizak, M. J., Datiles, M. B., Aletras, A. H., Kador, P. F., & Balaban, R. S. (2000). MRI of the human eye using magnetization transfer contrast enhancement. Investigative Ophthalmology and Visual Science, 41(12), 3878-3881.

MRI of the human eye using magnetization transfer contrast enhancement. / Lizak, M. J.; Datiles, M. B.; Aletras, A. H.; Kador, Peter F; Balaban, R. S.

In: Investigative Ophthalmology and Visual Science, Vol. 41, No. 12, 16.11.2000, p. 3878-3881.

Research output: Contribution to journalArticle

Lizak, MJ, Datiles, MB, Aletras, AH, Kador, PF & Balaban, RS 2000, 'MRI of the human eye using magnetization transfer contrast enhancement', Investigative Ophthalmology and Visual Science, vol. 41, no. 12, pp. 3878-3881.
Lizak, M. J. ; Datiles, M. B. ; Aletras, A. H. ; Kador, Peter F ; Balaban, R. S. / MRI of the human eye using magnetization transfer contrast enhancement. In: Investigative Ophthalmology and Visual Science. 2000 ; Vol. 41, No. 12. pp. 3878-3881.
@article{750b0ab1fb864b9489b76b23f1530772,
title = "MRI of the human eye using magnetization transfer contrast enhancement",
abstract = "PURPOSE. To determine the feasibility of using magnetization transfer contrast-enhanced magnetic resonance imaging (MRI) to track cataractous lens changes. METHODS. A fast spin-echo sequence was modified to include a magnetization transfer contrast (MTC) preparation pulse train. This consisted of twenty 8.5-msec sinc pulses, 1200 Hz upfield from the water resonance and 1.2-Hz power. The MTC preparation pulse was followed by acquisition through fast spin-echo imaging. The imaging parameters were number of excitations (NEX) = 1, echo time (TE) = 14 msec, recovery time (TR) = 2 sec, echo train length of eight echos, and a matrix size of 256 x 160. To reduce motion artifacts, the volunteers were asked to fixate on a blinking LED. Normal and MTC-enhanced images were acquired from normal volunteers and volunteers with nuclear or cortical cataracts. RESULTS. The eye was adequately imaged, with few motion artifacts appearing. The lens was well resolved, despite the short T2. The cornea and ciliary body were also clearly visible. In the lens, resolution of the epithelium and cortex were enhanced with MTC. In addition, contrast-to-noise ratios were measured for each image. Examination of the contrast-to-noise ratio confirmed that MTC increased the contrast between the nucleus and cortex. Unenhanced MRIs showed significant differences between the cortex of normal volunteers and volunteers with cataracts. MTC-enhanced images improved the sensitivity to changes in the nucleus. CONCLUSIONS. In this preliminary study, we were able to use MTC-enhanced MRI to obtain high-contrast images of the human lens. Regular and enhanced MRIs detected statistically significant differences between normal and cataractous lenses.",
author = "Lizak, {M. J.} and Datiles, {M. B.} and Aletras, {A. H.} and Kador, {Peter F} and Balaban, {R. S.}",
year = "2000",
month = "11",
day = "16",
language = "English (US)",
volume = "41",
pages = "3878--3881",
journal = "Investigative Ophthalmology and Visual Science",
issn = "0146-0404",
publisher = "Association for Research in Vision and Ophthalmology Inc.",
number = "12",

}

TY - JOUR

T1 - MRI of the human eye using magnetization transfer contrast enhancement

AU - Lizak, M. J.

AU - Datiles, M. B.

AU - Aletras, A. H.

AU - Kador, Peter F

AU - Balaban, R. S.

PY - 2000/11/16

Y1 - 2000/11/16

N2 - PURPOSE. To determine the feasibility of using magnetization transfer contrast-enhanced magnetic resonance imaging (MRI) to track cataractous lens changes. METHODS. A fast spin-echo sequence was modified to include a magnetization transfer contrast (MTC) preparation pulse train. This consisted of twenty 8.5-msec sinc pulses, 1200 Hz upfield from the water resonance and 1.2-Hz power. The MTC preparation pulse was followed by acquisition through fast spin-echo imaging. The imaging parameters were number of excitations (NEX) = 1, echo time (TE) = 14 msec, recovery time (TR) = 2 sec, echo train length of eight echos, and a matrix size of 256 x 160. To reduce motion artifacts, the volunteers were asked to fixate on a blinking LED. Normal and MTC-enhanced images were acquired from normal volunteers and volunteers with nuclear or cortical cataracts. RESULTS. The eye was adequately imaged, with few motion artifacts appearing. The lens was well resolved, despite the short T2. The cornea and ciliary body were also clearly visible. In the lens, resolution of the epithelium and cortex were enhanced with MTC. In addition, contrast-to-noise ratios were measured for each image. Examination of the contrast-to-noise ratio confirmed that MTC increased the contrast between the nucleus and cortex. Unenhanced MRIs showed significant differences between the cortex of normal volunteers and volunteers with cataracts. MTC-enhanced images improved the sensitivity to changes in the nucleus. CONCLUSIONS. In this preliminary study, we were able to use MTC-enhanced MRI to obtain high-contrast images of the human lens. Regular and enhanced MRIs detected statistically significant differences between normal and cataractous lenses.

AB - PURPOSE. To determine the feasibility of using magnetization transfer contrast-enhanced magnetic resonance imaging (MRI) to track cataractous lens changes. METHODS. A fast spin-echo sequence was modified to include a magnetization transfer contrast (MTC) preparation pulse train. This consisted of twenty 8.5-msec sinc pulses, 1200 Hz upfield from the water resonance and 1.2-Hz power. The MTC preparation pulse was followed by acquisition through fast spin-echo imaging. The imaging parameters were number of excitations (NEX) = 1, echo time (TE) = 14 msec, recovery time (TR) = 2 sec, echo train length of eight echos, and a matrix size of 256 x 160. To reduce motion artifacts, the volunteers were asked to fixate on a blinking LED. Normal and MTC-enhanced images were acquired from normal volunteers and volunteers with nuclear or cortical cataracts. RESULTS. The eye was adequately imaged, with few motion artifacts appearing. The lens was well resolved, despite the short T2. The cornea and ciliary body were also clearly visible. In the lens, resolution of the epithelium and cortex were enhanced with MTC. In addition, contrast-to-noise ratios were measured for each image. Examination of the contrast-to-noise ratio confirmed that MTC increased the contrast between the nucleus and cortex. Unenhanced MRIs showed significant differences between the cortex of normal volunteers and volunteers with cataracts. MTC-enhanced images improved the sensitivity to changes in the nucleus. CONCLUSIONS. In this preliminary study, we were able to use MTC-enhanced MRI to obtain high-contrast images of the human lens. Regular and enhanced MRIs detected statistically significant differences between normal and cataractous lenses.

UR - http://www.scopus.com/inward/record.url?scp=0033765369&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033765369&partnerID=8YFLogxK

M3 - Article

VL - 41

SP - 3878

EP - 3881

JO - Investigative Ophthalmology and Visual Science

JF - Investigative Ophthalmology and Visual Science

SN - 0146-0404

IS - 12

ER -