A Water Relaxation Atlas for Age‐ and Region‐Specific Metabolite Concentration Correction at 3 T

ABSTRACT Metabolite concentration estimates from magnetic resonance spectroscopy (MRS) are typically quantified using water referencing, correcting for relaxation‐time differences between metabolites and water. One common approach is to correct the reference signal for differential relaxation within...

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Published inNMR in biomedicine Vol. 38; no. 1; pp. e5300 - n/a
Main Authors Simegn, Gizeaddis Lamesgin, Song, Yulu, Murali‐Manohar, Saipavitra, Zöllner, Helge J., Davies‐Jenkins, Christopher W., Simicic, Dunja, Hupfeld, Kathleen E., Gudmundson, Aaron T., Muska, Emlyn, Carter, Emily, Hui, Steve C. N., Yedavalli, Vivek, Oeltzschner, Georg, Dean, Douglas C., Ceritoglu, Can, Ratnanather, J. Tilak, Porges, Eric, Edden, Richard
Format Journal Article
LanguageEnglish
Published England Wiley Subscription Services, Inc 01.01.2025
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Abstract ABSTRACT Metabolite concentration estimates from magnetic resonance spectroscopy (MRS) are typically quantified using water referencing, correcting for relaxation‐time differences between metabolites and water. One common approach is to correct the reference signal for differential relaxation within three tissue compartments (gray matter, white matter, and cerebrospinal fluid) using fixed literature values. However, water relaxation times (T1 and T2) vary between brain locations and with age. MRS studies, even those measuring metabolite levels across the lifespan, often ignore these effects, because of a lack of reference data. The purpose of this study is to develop a water relaxometry atlas and to integrate location‐ and age‐appropriate relaxation values into the MRS analysis workflow. One hundred one volunteers (51 men, 50 women; ~10 male, and 10 female participants per decade from the 20s to 60s) were recruited. T1‐weighted MPRAGE images ((1‐mm)3 isotropic resolution) were acquired. Whole‐brain water T1 and T2 measurements were made with DESPOT ((1.4 mm)3 isotropic resolution) at 3T. T1 and T2 maps were registered to the JHU MNI‐SS/EVE atlas using affine and LDDMM transformation. The atlas's 268 parcels were reduced to 130 by combining homologous parcels. Mean T1 and T2 values were calculated for each parcel in each subject. Linear models of T1 and T2 as functions of age were computed, using age − 30 as the predictor. Reference atlases of “age‐30‐intercept” and age‐slope for T1 and T2 were generated. The atlas‐based workflow was integrated into Osprey, which co‐registers MRS voxels to the atlas and calculates location‐ and age‐appropriate water relaxation parameters for quantification. The water relaxation aging atlas revealed significant regional and tissue differences in water relaxation behavior across adulthood. Using location‐ and subject‐appropriate reference values in the MRS analysis workflow removes a current methodological limitation and is expected to reduce quantification biases associated with water‐referenced tissue correction, especially for studies of aging. This study presents a water relaxometry atlas incorporating location‐ and age‐appropriate T1 and T2 values to improve MRS‐derived metabolite quantification. Using data from 101 volunteers, the atlas accounts for regional and age‐related differences in water relaxation, integrated into the Osprey MRS analysis workflow. This can help reduce quantification biases, particularly in aging studies, by correcting tissue‐specific water relaxation behavior.
AbstractList Metabolite concentration estimates from magnetic resonance spectroscopy (MRS) are typically quantified using water referencing, correcting for relaxation‐time differences between metabolites and water. One common approach is to correct the reference signal for differential relaxation within three tissue compartments (gray matter, white matter, and cerebrospinal fluid) using fixed literature values. However, water relaxation times ( T 1 and T 2 ) vary between brain locations and with age. MRS studies, even those measuring metabolite levels across the lifespan, often ignore these effects, because of a lack of reference data. The purpose of this study is to develop a water relaxometry atlas and to integrate location‐ and age‐appropriate relaxation values into the MRS analysis workflow. One hundred one volunteers (51 men, 50 women; ~10 male, and 10 female participants per decade from the 20s to 60s) were recruited. T 1 ‐weighted MPRAGE images ((1‐mm) 3 isotropic resolution) were acquired. Whole‐brain water T 1 and T 2 measurements were made with DESPOT ((1.4 mm) 3 isotropic resolution) at 3T. T 1 and T 2 maps were registered to the JHU MNI‐SS/EVE atlas using affine and LDDMM transformation. The atlas's 268 parcels were reduced to 130 by combining homologous parcels. Mean T 1 and T 2 values were calculated for each parcel in each subject. Linear models of T 1 and T 2 as functions of age were computed, using age − 30 as the predictor. Reference atlases of “age‐30‐intercept” and age‐slope for T 1 and T 2 were generated. The atlas‐based workflow was integrated into Osprey, which co‐registers MRS voxels to the atlas and calculates location‐ and age‐appropriate water relaxation parameters for quantification. The water relaxation aging atlas revealed significant regional and tissue differences in water relaxation behavior across adulthood. Using location‐ and subject‐appropriate reference values in the MRS analysis workflow removes a current methodological limitation and is expected to reduce quantification biases associated with water‐referenced tissue correction, especially for studies of aging.
Metabolite concentration estimates from magnetic resonance spectroscopy (MRS) are typically quantified using water referencing, correcting for relaxation‐time differences between metabolites and water. One common approach is to correct the reference signal for differential relaxation within three tissue compartments (gray matter, white matter, and cerebrospinal fluid) using fixed literature values. However, water relaxation times (T1 and T2) vary between brain locations and with age. MRS studies, even those measuring metabolite levels across the lifespan, often ignore these effects, because of a lack of reference data. The purpose of this study is to develop a water relaxometry atlas and to integrate location‐ and age‐appropriate relaxation values into the MRS analysis workflow. One hundred one volunteers (51 men, 50 women; ~10 male, and 10 female participants per decade from the 20s to 60s) were recruited. T1‐weighted MPRAGE images ((1‐mm)3 isotropic resolution) were acquired. Whole‐brain water T1 and T2 measurements were made with DESPOT ((1.4 mm)3 isotropic resolution) at 3T. T1 and T2 maps were registered to the JHU MNI‐SS/EVE atlas using affine and LDDMM transformation. The atlas's 268 parcels were reduced to 130 by combining homologous parcels. Mean T1 and T2 values were calculated for each parcel in each subject. Linear models of T1 and T2 as functions of age were computed, using age − 30 as the predictor. Reference atlases of “age‐30‐intercept” and age‐slope for T1 and T2 were generated. The atlas‐based workflow was integrated into Osprey, which co‐registers MRS voxels to the atlas and calculates location‐ and age‐appropriate water relaxation parameters for quantification. The water relaxation aging atlas revealed significant regional and tissue differences in water relaxation behavior across adulthood. Using location‐ and subject‐appropriate reference values in the MRS analysis workflow removes a current methodological limitation and is expected to reduce quantification biases associated with water‐referenced tissue correction, especially for studies of aging.
Metabolite concentration estimates from magnetic resonance spectroscopy (MRS) are typically quantified using water referencing, correcting for relaxation-time differences between metabolites and water. One common approach is to correct the reference signal for differential relaxation within three tissue compartments (gray matter, white matter, and cerebrospinal fluid) using fixed literature values. However, water relaxation times ( T 1 and T 2 ) vary between brain locations and with age. MRS studies, even those measuring metabolite levels across the lifespan, often ignore these effects, because of a lack of reference data. The purpose of this study is to develop a water relaxometry atlas and to integrate location- and age-appropriate relaxation values into the MRS analysis workflow. One hundred one volunteers (51 men, 50 women; ~10 male, and 10 female participants per decade from the 20s to 60s) were recruited. T 1 -weighted MPRAGE images ((1-mm) 3 isotropic resolution) were acquired. Whole-brain water T 1 and T 2 measurements were made with DESPOT ((1.4 mm) 3 isotropic resolution) at 3T. T 1 and T 2 maps were registered to the JHU MNI-SS/EVE atlas using affine and LDDMM transformation. The atlas's 268 parcels were reduced to 130 by combining homologous parcels. Mean T 1 and T 2 values were calculated for each parcel in each subject. Linear models of T 1 and T 2 as functions of age were computed, using age − 30 as the predictor. Reference atlases of “age-30-intercept” and age-slope for T 1 and T 2 were generated. The atlas-based workflow was integrated into Osprey, which co-registers MRS voxels to the atlas and calculates location- and age-appropriate water relaxation parameters for quantification. The water relaxation aging atlas revealed significant regional and tissue differences in water relaxation behavior across adulthood. Using location- and subject-appropriate reference values in the MRS analysis workflow removes a current methodological limitation and is expected to reduce quantification biases associated with water-referenced tissue correction, especially for studies of aging.
Metabolite concentration estimates from magnetic resonance spectroscopy (MRS) are typically quantified using water referencing, correcting for relaxation-time differences between metabolites and water. One common approach is to correct the reference signal for differential relaxation within three tissue compartments (gray matter, white matter, and cerebrospinal fluid) using fixed literature values. However, water relaxation times (T and T ) vary between brain locations and with age. MRS studies, even those measuring metabolite levels across the lifespan, often ignore these effects, because of a lack of reference data. The purpose of this study is to develop a water relaxometry atlas and to integrate location- and age-appropriate relaxation values into the MRS analysis workflow. One hundred one volunteers (51 men, 50 women; ~10 male, and 10 female participants per decade from the 20s to 60s) were recruited. T -weighted MPRAGE images ((1-mm) isotropic resolution) were acquired. Whole-brain water T and T measurements were made with DESPOT ((1.4 mm) isotropic resolution) at 3T. T and T maps were registered to the JHU MNI-SS/EVE atlas using affine and LDDMM transformation. The atlas's 268 parcels were reduced to 130 by combining homologous parcels. Mean T and T values were calculated for each parcel in each subject. Linear models of T and T as functions of age were computed, using age - 30 as the predictor. Reference atlases of "age-30-intercept" and age-slope for T and T were generated. The atlas-based workflow was integrated into Osprey, which co-registers MRS voxels to the atlas and calculates location- and age-appropriate water relaxation parameters for quantification. The water relaxation aging atlas revealed significant regional and tissue differences in water relaxation behavior across adulthood. Using location- and subject-appropriate reference values in the MRS analysis workflow removes a current methodological limitation and is expected to reduce quantification biases associated with water-referenced tissue correction, especially for studies of aging.
ABSTRACT Metabolite concentration estimates from magnetic resonance spectroscopy (MRS) are typically quantified using water referencing, correcting for relaxation‐time differences between metabolites and water. One common approach is to correct the reference signal for differential relaxation within three tissue compartments (gray matter, white matter, and cerebrospinal fluid) using fixed literature values. However, water relaxation times (T1 and T2) vary between brain locations and with age. MRS studies, even those measuring metabolite levels across the lifespan, often ignore these effects, because of a lack of reference data. The purpose of this study is to develop a water relaxometry atlas and to integrate location‐ and age‐appropriate relaxation values into the MRS analysis workflow. One hundred one volunteers (51 men, 50 women; ~10 male, and 10 female participants per decade from the 20s to 60s) were recruited. T1‐weighted MPRAGE images ((1‐mm)3 isotropic resolution) were acquired. Whole‐brain water T1 and T2 measurements were made with DESPOT ((1.4 mm)3 isotropic resolution) at 3T. T1 and T2 maps were registered to the JHU MNI‐SS/EVE atlas using affine and LDDMM transformation. The atlas's 268 parcels were reduced to 130 by combining homologous parcels. Mean T1 and T2 values were calculated for each parcel in each subject. Linear models of T1 and T2 as functions of age were computed, using age − 30 as the predictor. Reference atlases of “age‐30‐intercept” and age‐slope for T1 and T2 were generated. The atlas‐based workflow was integrated into Osprey, which co‐registers MRS voxels to the atlas and calculates location‐ and age‐appropriate water relaxation parameters for quantification. The water relaxation aging atlas revealed significant regional and tissue differences in water relaxation behavior across adulthood. Using location‐ and subject‐appropriate reference values in the MRS analysis workflow removes a current methodological limitation and is expected to reduce quantification biases associated with water‐referenced tissue correction, especially for studies of aging. This study presents a water relaxometry atlas incorporating location‐ and age‐appropriate T1 and T2 values to improve MRS‐derived metabolite quantification. Using data from 101 volunteers, the atlas accounts for regional and age‐related differences in water relaxation, integrated into the Osprey MRS analysis workflow. This can help reduce quantification biases, particularly in aging studies, by correcting tissue‐specific water relaxation behavior.
Metabolite concentration estimates from magnetic resonance spectroscopy (MRS) are typically quantified using water referencing, correcting for relaxation-time differences between metabolites and water. One common approach is to correct the reference signal for differential relaxation within three tissue compartments (gray matter, white matter, and cerebrospinal fluid) using fixed literature values. However, water relaxation times (T1 and T2) vary between brain locations and with age. MRS studies, even those measuring metabolite levels across the lifespan, often ignore these effects, because of a lack of reference data. The purpose of this study is to develop a water relaxometry atlas and to integrate location- and age-appropriate relaxation values into the MRS analysis workflow. One hundred one volunteers (51 men, 50 women; ~10 male, and 10 female participants per decade from the 20s to 60s) were recruited. T1-weighted MPRAGE images ((1-mm)3 isotropic resolution) were acquired. Whole-brain water T1 and T2 measurements were made with DESPOT ((1.4 mm)3 isotropic resolution) at 3T. T1 and T2 maps were registered to the JHU MNI-SS/EVE atlas using affine and LDDMM transformation. The atlas's 268 parcels were reduced to 130 by combining homologous parcels. Mean T1 and T2 values were calculated for each parcel in each subject. Linear models of T1 and T2 as functions of age were computed, using age - 30 as the predictor. Reference atlases of "age-30-intercept" and age-slope for T1 and T2 were generated. The atlas-based workflow was integrated into Osprey, which co-registers MRS voxels to the atlas and calculates location- and age-appropriate water relaxation parameters for quantification. The water relaxation aging atlas revealed significant regional and tissue differences in water relaxation behavior across adulthood. Using location- and subject-appropriate reference values in the MRS analysis workflow removes a current methodological limitation and is expected to reduce quantification biases associated with water-referenced tissue correction, especially for studies of aging.Metabolite concentration estimates from magnetic resonance spectroscopy (MRS) are typically quantified using water referencing, correcting for relaxation-time differences between metabolites and water. One common approach is to correct the reference signal for differential relaxation within three tissue compartments (gray matter, white matter, and cerebrospinal fluid) using fixed literature values. However, water relaxation times (T1 and T2) vary between brain locations and with age. MRS studies, even those measuring metabolite levels across the lifespan, often ignore these effects, because of a lack of reference data. The purpose of this study is to develop a water relaxometry atlas and to integrate location- and age-appropriate relaxation values into the MRS analysis workflow. One hundred one volunteers (51 men, 50 women; ~10 male, and 10 female participants per decade from the 20s to 60s) were recruited. T1-weighted MPRAGE images ((1-mm)3 isotropic resolution) were acquired. Whole-brain water T1 and T2 measurements were made with DESPOT ((1.4 mm)3 isotropic resolution) at 3T. T1 and T2 maps were registered to the JHU MNI-SS/EVE atlas using affine and LDDMM transformation. The atlas's 268 parcels were reduced to 130 by combining homologous parcels. Mean T1 and T2 values were calculated for each parcel in each subject. Linear models of T1 and T2 as functions of age were computed, using age - 30 as the predictor. Reference atlases of "age-30-intercept" and age-slope for T1 and T2 were generated. The atlas-based workflow was integrated into Osprey, which co-registers MRS voxels to the atlas and calculates location- and age-appropriate water relaxation parameters for quantification. The water relaxation aging atlas revealed significant regional and tissue differences in water relaxation behavior across adulthood. Using location- and subject-appropriate reference values in the MRS analysis workflow removes a current methodological limitation and is expected to reduce quantification biases associated with water-referenced tissue correction, especially for studies of aging.
Author Ratnanather, J. Tilak
Hupfeld, Kathleen E.
Hui, Steve C. N.
Carter, Emily
Gudmundson, Aaron T.
Yedavalli, Vivek
Murali‐Manohar, Saipavitra
Edden, Richard
Song, Yulu
Muska, Emlyn
Simicic, Dunja
Oeltzschner, Georg
Zöllner, Helge J.
Simegn, Gizeaddis Lamesgin
Ceritoglu, Can
Davies‐Jenkins, Christopher W.
Dean, Douglas C.
Porges, Eric
AuthorAffiliation 8 Department of Pediatrics, Division of Neonatology and Newborn Nursey, University of WI-Madison, School of Medicine and Public Health, Madison, Wisconsin, USA
5 Department of Radiology, The George Washington University School of Medicine and Health Sciences, Washington, DC, USA
9 Department of Medical Physics, University of WI-Madison, School of Medicine and Public Health, Madison, Wisconsin, USA
6 Department of Pediatrics, The George Washington University School of Medicine and Health Sciences, Washington, DC, USA
7 Waisman Center, University of WI-Madison, Madison, Wisconsin, USA
2 F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, Maryland, USA
10 Center for Imaging Science and Institute for Computational Medicine, Department of Biomedical Engineering, JHU, Baltimore, Maryland, USA
4 Developing Brain Institute, Children's National Hospital, Washington, DC, USA
1 The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins
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  surname: Oeltzschner
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  givenname: Douglas C.
  surname: Dean
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  surname: Ceritoglu
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  email: redden1@jh.edu
  organization: Kennedy Krieger Institute
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Fri Jul 25 09:59:10 EDT 2025
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Issue 1
Keywords Relaxometry atlas
relaxation times
aging
metabolite quantification
brain parcels
MRS
Language English
License 2024 John Wiley & Sons, Ltd.
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Notes Funding
This work was supported by the National Institutes of Health (NIH) (Grants R01 EB016089, R01 EB023963, R01 EB032788, R01 EB035529, R00 AG062230, R21 EB033516, K99 AG080084, K00 AG068440, P01AA029543, R01DK099334, and P41 EB031771).
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Snippet ABSTRACT Metabolite concentration estimates from magnetic resonance spectroscopy (MRS) are typically quantified using water referencing, correcting for...
Metabolite concentration estimates from magnetic resonance spectroscopy (MRS) are typically quantified using water referencing, correcting for relaxation‐time...
Metabolite concentration estimates from magnetic resonance spectroscopy (MRS) are typically quantified using water referencing, correcting for relaxation-time...
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SourceType Open Access Repository
Aggregation Database
Index Database
Publisher
StartPage e5300
SubjectTerms Adult
Age
Aging
Aging - metabolism
Atlases as Topic
Brain
Brain - diagnostic imaging
Brain - metabolism
Brain mapping
brain parcels
Cerebrospinal fluid
Female
Humans
Image acquisition
Life span
Magnetic induction
Magnetic Resonance Imaging
Magnetic Resonance Spectroscopy
Male
metabolite quantification
Metabolites
Middle Aged
MRS
Reference signals
relaxation times
Relaxometry atlas
Substantia alba
Substantia grisea
Water
Water - chemistry
Water - metabolism
Workflow
Young Adult
Title A Water Relaxation Atlas for Age‐ and Region‐Specific Metabolite Concentration Correction at 3 T
URI https://onlinelibrary.wiley.com/doi/abs/10.1002%2Fnbm.5300
https://www.ncbi.nlm.nih.gov/pubmed/39662516
https://www.proquest.com/docview/3147266740
https://www.proquest.com/docview/3146651056
https://pubmed.ncbi.nlm.nih.gov/PMC12127971
Volume 38
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