{"id":30033,"date":"2026-03-23T16:08:09","date_gmt":"2026-03-23T15:08:09","guid":{"rendered":"https:\/\/sano.science\/?p=30033"},"modified":"2026-03-24T06:57:08","modified_gmt":"2026-03-24T05:57:08","slug":"a-non-local-diffusion-magnetic-resonance-imaging-tract-density-biomarker-to-stratify-predict-and-interpret-survival-rates-in-human-glioblastoma","status":"publish","type":"post","link":"https:\/\/sano.science\/a-non-local-diffusion-magnetic-resonance-imaging-tract-density-biomarker-to-stratify-predict-and-interpret-survival-rates-in-human-glioblastoma\/","title":{"rendered":"A non-local diffusion magnetic resonance imaging tract density biomarker to stratify, predict, and interpret survival rates in human glioblastoma"},"content":{"rendered":"\n<p class=\" eplus-wrapper\">A novel connectomics-based biomarker offers a new lens for predicting <strong>glioblastoma<\/strong> survival. A new study titled \u201cA non-local diffusion magnetic resonance imaging tract density biomarker to stratify, predict, and interpret survival rates in human glioblastoma\u201d has been published in Neuro-Oncology. The research, co-led by members of the Computational Neuroscience team at Sano and researchers from Humanitas University and IRCCS Humanitas Research Hospital, presents a new approach to predict and understand the clinical outcomes of one of the most lethal brain tumors.<\/p>\n\n\n\n<p class=\" eplus-wrapper\"><br>Traditionally, glioblastoma (GBM) has been regarded as a focal lesion disrupting brain tissue. However, increasing evidence suggests that these tumors are active members of brain networks, leveraging white matter as a morphological substrate to grow and migrate to distant regions. This work introduces the Lesion-Tract Density Index (L-TDI), which uses normative white matter tractograms to quantify the intersection between the tumor and the brain&#8217;s large-scale network architecture.<\/p>\n\n\n\n<p class=\" eplus-wrapper\"><br>By testing the L-TDI in two independent cohorts comprising over 850 patients, the researchers demonstrated that this marker is a robust predictor of survival. Crucially, the L- TDI incorporates information about the tumor&#8217;s size, its location, and the density of the white matter it affects, making it more effective than looking at tumor volume alone.<br><\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer eplus-wrapper\"><\/div>\n\n\n\n<p class=\" eplus-wrapper\">The study found that patients with a high L-TDI, indicating a more complex interaction with the brain&#8217;s white matter scaffold, had significantly worse prognoses. This integrative approach provides an anatomically interpretable biomarker that could revolutionize clinical decision-making. For instance, L-TDI maps could help refine radiotherapy planning by identifying potential routes of microscopic tumor spread along white matter pathways.<br><\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer eplus-wrapper\"><\/div>\n\n\n\n<p class=\" eplus-wrapper\">Ultimately, this work advocates for a paradigm shift toward connectomics-guided neuro- oncology, where treating a brain tumor means understanding its place within the brain\u2019s complex structural network.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer eplus-wrapper\"><\/div>\n\n\n\n<p class=\" eplus-wrapper\">Autors: <a href=\"https:\/\/sano.science\/people\/joan-falco-roget\/\" type=\"people\" id=\"1570\">Joan Falc\u00f3-Roget<\/a> (Sano),\u00a0Gianpaolo Antonio Basile,\u00a0<a href=\"https:\/\/sano.science\/people\/anna-janus\/\" type=\"people\" id=\"22468\">Anna Janus<\/a>,\u00a0Sara Lillo,\u00a0Letterio S Politi,\u00a0<a href=\"https:\/\/sano.science\/people\/jan-argasinski\/\" type=\"people\" id=\"13660\">Jan K. Argasinski<\/a>, Alberto Cacciola<br>See the full text: <a href=\"https:\/\/academic.oup.com\/neuro-oncology\/article\/28\/2\/564\/8287534\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><strong>academic.oup.com\/neuro-oncology\/article\/<\/strong><\/a><\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer eplus-wrapper\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-large eplus-wrapper\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"821\" src=\"https:\/\/sano.science\/wp-content\/uploads\/2026\/03\/A-non-local-diffusion-magnetic-resonance-imaging-tract-density-biomarker-to-stratify-predict-and-interpret-survival-rates-in-human-glioblastoma-1024x821.jpeg\" alt=\"The lesion-tract density index (L\u2009-TDI): a survival marker in human GBM. (A) For every subject, the data were normalized to a common template. The T2-weighted image was chosen as the reference modality, and the GBM was inversely masked to discard distorted tissue during the optimization. (B) The normalized tumor mask is used in combination with the whole brain normative tractogram to extract the set of streamlines that intersect the tumor in the same template space as in (A). (C) The lesion-tract density map (L\u2009-TDM) provides a unique white matter density map describing the tracts in (B) that interact with the GBM. (D) From the L\u2009-TDM, we can define the L\u2009-TDI marker by averaging the tract density within the L\u2009-TDM binary mask in (C). For a given cohort, the sample can be stratified according to a given percentile. (E) Once a stratification threshold has been set, we conduct thorough tests to assess the discovery of the biomarker. Additional survival analyses on multiple stratification thresholds help determine whether the potential biomarker holds prognostic value. The L\u2009-TDI can also be used to characterize both morphological and anatomical landscapes in GBMs, which can be used to understand differences in the survival rates. Once a robust effect has been identified, the L\u2009-TDI can be incorporated into standard risk analysis and predictive frameworks to improve patient care.\" class=\"wp-image-30035\" srcset=\"https:\/\/sano.science\/wp-content\/uploads\/2026\/03\/A-non-local-diffusion-magnetic-resonance-imaging-tract-density-biomarker-to-stratify-predict-and-interpret-survival-rates-in-human-glioblastoma-1024x821.jpeg 1024w, https:\/\/sano.science\/wp-content\/uploads\/2026\/03\/A-non-local-diffusion-magnetic-resonance-imaging-tract-density-biomarker-to-stratify-predict-and-interpret-survival-rates-in-human-glioblastoma-300x241.jpeg 300w, https:\/\/sano.science\/wp-content\/uploads\/2026\/03\/A-non-local-diffusion-magnetic-resonance-imaging-tract-density-biomarker-to-stratify-predict-and-interpret-survival-rates-in-human-glioblastoma-768x616.jpeg 768w, https:\/\/sano.science\/wp-content\/uploads\/2026\/03\/A-non-local-diffusion-magnetic-resonance-imaging-tract-density-biomarker-to-stratify-predict-and-interpret-survival-rates-in-human-glioblastoma-1536x1232.jpeg 1536w, https:\/\/sano.science\/wp-content\/uploads\/2026\/03\/A-non-local-diffusion-magnetic-resonance-imaging-tract-density-biomarker-to-stratify-predict-and-interpret-survival-rates-in-human-glioblastoma.jpeg 1900w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">The lesion-tract density index (L\u2009-TDI): a survival marker in human GBM. (A) For every subject, the data were normalized to a common template. The T2-weighted image was chosen as the reference modality, and the GBM was inversely masked to discard distorted tissue during the optimization. (B) The normalized tumor mask is used in combination with the whole brain normative tractogram to extract the set of streamlines that intersect the tumor in the same template space as in (A). (C) The lesion-tract density map (L\u2009-TDM) provides a unique white matter density map describing the tracts in (B) that interact with the GBM. (D) From the L\u2009-TDM, we can define the L\u2009-TDI marker by averaging the tract density within the L\u2009-TDM binary mask in (C). For a given cohort, the sample can be stratified according to a given percentile. (E) Once a stratification threshold has been set, we conduct thorough tests to assess the discovery of the biomarker. Additional survival analyses on multiple stratification thresholds help determine whether the potential biomarker holds prognostic value. The L\u2009-TDI can also be used to characterize both morphological and anatomical landscapes in GBMs, which can be used to understand differences in the survival rates. Once a robust effect has been identified, the L\u2009-TDI can be incorporated into standard risk analysis and predictive frameworks to improve patient care.<\/figcaption><\/figure>\n","protected":false},"excerpt":"New publication presents a connectomics-based biomarker for predicting glioblastoma survival","author":8,"featured_media":30035,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"editor_plus_post_options":"{}","editor_plus_copied_stylings":"{}","footnotes":""},"categories":[1],"tags":[],"class_list":["post-30033","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>A non-local diffusion magnetic resonance imaging tract density biomarker to stratify, predict, and interpret survival rates in human glioblastoma - 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(A) For every subject, the data were normalized to a common template. The T2-weighted image was chosen as the reference modality, and the GBM was inversely masked to discard distorted tissue during the optimization. (B) The normalized tumor mask is used in combination with the whole brain normative tractogram to extract the set of streamlines that intersect the tumor in the same template space as in (A). (C) The lesion-tract density map (L\u2009-TDM) provides a unique white matter density map describing the tracts in (B) that interact with the GBM. (D) From the L\u2009-TDM, we can define the L\u2009-TDI marker by averaging the tract density within the L\u2009-TDM binary mask in (C). For a given cohort, the sample can be stratified according to a given percentile. (E) Once a stratification threshold has been set, we conduct thorough tests to assess the discovery of the biomarker. Additional survival analyses on multiple stratification thresholds help determine whether the potential biomarker holds prognostic value. The L\u2009-TDI can also be used to characterize both morphological and anatomical landscapes in GBMs, which can be used to understand differences in the survival rates. Once a robust effect has been identified, the L\u2009-TDI can be incorporated into standard risk analysis and predictive frameworks to improve patient care."},{"@type":"BreadcrumbList","@id":"https:\/\/sano.science\/a-non-local-diffusion-magnetic-resonance-imaging-tract-density-biomarker-to-stratify-predict-and-interpret-survival-rates-in-human-glioblastoma\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/sano.science\/"},{"@type":"ListItem","position":2,"name":"A non-local diffusion magnetic resonance imaging tract density biomarker to stratify, predict, and interpret survival rates in human glioblastoma"}]},{"@type":"WebSite","@id":"https:\/\/sano.science\/#website","url":"https:\/\/sano.science\/","name":"Centre for Computational Personalized Medicine","description":"Sano \u2013 Centre for Computational Medicine","publisher":{"@id":"https:\/\/sano.science\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/sano.science\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/sano.science\/#organization","name":"Sano \u2013 Centre for Computational Medicine","alternateName":"Sano","url":"https:\/\/sano.science\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/sano.science\/#\/schema\/logo\/image\/","url":"https:\/\/sano.science\/wp-content\/uploads\/2024\/05\/logo_sano_podstawowe.png","contentUrl":"https:\/\/sano.science\/wp-content\/uploads\/2024\/05\/logo_sano_podstawowe.png","width":700,"height":265,"caption":"Sano \u2013 Centre for Computational Medicine"},"image":{"@id":"https:\/\/sano.science\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/sano.science\/","https:\/\/x.com\/sanoscience","https:\/\/www.linkedin.com\/company\/sanoscience\/","https:\/\/www.youtube.com\/channel\/UCDZ_8TcjMWUG2ZcgKKgfpwQ","https:\/\/bsky.app\/profile\/sanoscience.bsky.social"]},{"@type":"Person","@id":"https:\/\/sano.science\/#\/schema\/person\/561b69b48b6a8f7904aed06df5d03c98","name":"Sano","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/3349c3947cb21b81e9745a6442fe4ec43961bb077198eb416cbdc66ec45ea97c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/3349c3947cb21b81e9745a6442fe4ec43961bb077198eb416cbdc66ec45ea97c?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/3349c3947cb21b81e9745a6442fe4ec43961bb077198eb416cbdc66ec45ea97c?s=96&d=mm&r=g","caption":"Sano"},"url":"https:\/\/sano.science\/author\/s15to\/"}]}},"acf":[],"gutenberg_blocks":[{"blockName":"custom-styles","attrs":{"styles":""}},{"blockName":"core\/paragraph","attrs":{"epAnimationGeneratedClass":"edplus_anim-X24VES","epGeneratedClass":"eplus-wrapper"},"innerBlocks":[],"innerHTML":"\n<p class=\" eplus-wrapper\">A novel connectomics-based biomarker offers a new lens for predicting <strong>glioblastoma<\/strong> survival. A new study titled \u201cA non-local diffusion magnetic resonance imaging tract density biomarker to stratify, predict, and interpret survival rates in human glioblastoma\u201d has been published in Neuro-Oncology. The research, co-led by members of the Computational Neuroscience team at Sano and researchers from Humanitas University and IRCCS Humanitas Research Hospital, presents a new approach to predict and understand the clinical outcomes of one of the most lethal brain tumors.<\/p>\n","innerContent":["\n<p class=\" eplus-wrapper\">A novel connectomics-based biomarker offers a new lens for predicting <strong>glioblastoma<\/strong> survival. A new study titled \u201cA non-local diffusion magnetic resonance imaging tract density biomarker to stratify, predict, and interpret survival rates in human glioblastoma\u201d has been published in Neuro-Oncology. The research, co-led by members of the Computational Neuroscience team at Sano and researchers from Humanitas University and IRCCS Humanitas Research Hospital, presents a new approach to predict and understand the clinical outcomes of one of the most lethal brain tumors.<\/p>\n"]},{"blockName":"core\/paragraph","attrs":{"epAnimationGeneratedClass":"edplus_anim-X24VES","epGeneratedClass":"eplus-wrapper"},"innerBlocks":[],"innerHTML":"\n<p class=\" eplus-wrapper\"><br>Traditionally, glioblastoma (GBM) has been regarded as a focal lesion disrupting brain tissue. However, increasing evidence suggests that these tumors are active members of brain networks, leveraging white matter as a morphological substrate to grow and migrate to distant regions. This work introduces the Lesion-Tract Density Index (L-TDI), which uses normative white matter tractograms to quantify the intersection between the tumor and the brain's large-scale network architecture.<\/p>\n","innerContent":["\n<p class=\" eplus-wrapper\"><br>Traditionally, glioblastoma (GBM) has been regarded as a focal lesion disrupting brain tissue. However, increasing evidence suggests that these tumors are active members of brain networks, leveraging white matter as a morphological substrate to grow and migrate to distant regions. This work introduces the Lesion-Tract Density Index (L-TDI), which uses normative white matter tractograms to quantify the intersection between the tumor and the brain's large-scale network architecture.<\/p>\n"]},{"blockName":"core\/paragraph","attrs":{"epAnimationGeneratedClass":"edplus_anim-X24VES","epGeneratedClass":"eplus-wrapper"},"innerBlocks":[],"innerHTML":"\n<p class=\" eplus-wrapper\"><br>By testing the L-TDI in two independent cohorts comprising over 850 patients, the researchers demonstrated that this marker is a robust predictor of survival. Crucially, the L- TDI incorporates information about the tumor's size, its location, and the density of the white matter it affects, making it more effective than looking at tumor volume alone.<br><\/p>\n","innerContent":["\n<p class=\" eplus-wrapper\"><br>By testing the L-TDI in two independent cohorts comprising over 850 patients, the researchers demonstrated that this marker is a robust predictor of survival. Crucially, the L- TDI incorporates information about the tumor's size, its location, and the density of the white matter it affects, making it more effective than looking at tumor volume alone.<br><\/p>\n"]},{"blockName":"core\/spacer","attrs":{"height":"20px","epAnimationGeneratedClass":"edplus_anim-Fx13kx","epGeneratedClass":"eplus-wrapper"},"innerBlocks":[],"innerHTML":"\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer eplus-wrapper\"><\/div>\n","innerContent":["\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer eplus-wrapper\"><\/div>\n"]},{"blockName":"core\/paragraph","attrs":{"epAnimationGeneratedClass":"edplus_anim-X24VES","epGeneratedClass":"eplus-wrapper"},"innerBlocks":[],"innerHTML":"\n<p class=\" eplus-wrapper\">The study found that patients with a high L-TDI, indicating a more complex interaction with the brain's white matter scaffold, had significantly worse prognoses. This integrative approach provides an anatomically interpretable biomarker that could revolutionize clinical decision-making. For instance, L-TDI maps could help refine radiotherapy planning by identifying potential routes of microscopic tumor spread along white matter pathways.<br><\/p>\n","innerContent":["\n<p class=\" eplus-wrapper\">The study found that patients with a high L-TDI, indicating a more complex interaction with the brain's white matter scaffold, had significantly worse prognoses. This integrative approach provides an anatomically interpretable biomarker that could revolutionize clinical decision-making. For instance, L-TDI maps could help refine radiotherapy planning by identifying potential routes of microscopic tumor spread along white matter pathways.<br><\/p>\n"]},{"blockName":"core\/spacer","attrs":{"height":"20px","epAnimationGeneratedClass":"edplus_anim-Fx13kx","epGeneratedClass":"eplus-wrapper"},"innerBlocks":[],"innerHTML":"\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer eplus-wrapper\"><\/div>\n","innerContent":["\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer eplus-wrapper\"><\/div>\n"]},{"blockName":"core\/paragraph","attrs":{"epAnimationGeneratedClass":"edplus_anim-X24VES","epGeneratedClass":"eplus-wrapper"},"innerBlocks":[],"innerHTML":"\n<p class=\" eplus-wrapper\">Ultimately, this work advocates for a paradigm shift toward connectomics-guided neuro- oncology, where treating a brain tumor means understanding its place within the brain\u2019s complex structural network.<\/p>\n","innerContent":["\n<p class=\" eplus-wrapper\">Ultimately, this work advocates for a paradigm shift toward connectomics-guided neuro- oncology, where treating a brain tumor means understanding its place within the brain\u2019s complex structural network.<\/p>\n"]},{"blockName":"core\/spacer","attrs":{"height":"50px","epAnimationGeneratedClass":"edplus_anim-rD7XMu","epGeneratedClass":"eplus-wrapper"},"innerBlocks":[],"innerHTML":"\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer eplus-wrapper\"><\/div>\n","innerContent":["\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer eplus-wrapper\"><\/div>\n"]},{"blockName":"core\/paragraph","attrs":{"epAnimationGeneratedClass":"edplus_anim-X24VES","epGeneratedClass":"eplus-wrapper"},"innerBlocks":[],"innerHTML":"\n<p class=\" eplus-wrapper\">Autors: <a href=\"https:\/\/sano.science\/people\/joan-falco-roget\/\" type=\"people\" id=\"1570\">Joan Falc\u00f3-Roget<\/a> (Sano),\u00a0Gianpaolo Antonio Basile,\u00a0<a href=\"https:\/\/sano.science\/people\/anna-janus\/\" type=\"people\" id=\"22468\">Anna Janus<\/a>,\u00a0Sara Lillo,\u00a0Letterio S Politi,\u00a0<a href=\"https:\/\/sano.science\/people\/jan-argasinski\/\" type=\"people\" id=\"13660\">Jan K. Argasinski<\/a>, Alberto Cacciola<br>See the full text: <a href=\"https:\/\/academic.oup.com\/neuro-oncology\/article\/28\/2\/564\/8287534\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><strong>academic.oup.com\/neuro-oncology\/article\/<\/strong><\/a><\/p>\n","innerContent":["\n<p class=\" eplus-wrapper\">Autors: <a href=\"https:\/\/sano.science\/people\/joan-falco-roget\/\" type=\"people\" id=\"1570\">Joan Falc\u00f3-Roget<\/a> (Sano),\u00a0Gianpaolo Antonio Basile,\u00a0<a href=\"https:\/\/sano.science\/people\/anna-janus\/\" type=\"people\" id=\"22468\">Anna Janus<\/a>,\u00a0Sara Lillo,\u00a0Letterio S Politi,\u00a0<a href=\"https:\/\/sano.science\/people\/jan-argasinski\/\" type=\"people\" id=\"13660\">Jan K. Argasinski<\/a>, Alberto Cacciola<br>See the full text: <a href=\"https:\/\/academic.oup.com\/neuro-oncology\/article\/28\/2\/564\/8287534\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><strong>academic.oup.com\/neuro-oncology\/article\/<\/strong><\/a><\/p>\n"]},{"blockName":"core\/spacer","attrs":{"height":"50px","epAnimationGeneratedClass":"edplus_anim-RRfzJC","epGeneratedClass":"eplus-wrapper"},"innerBlocks":[],"innerHTML":"\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer eplus-wrapper\"><\/div>\n","innerContent":["\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer eplus-wrapper\"><\/div>\n"]},{"blockName":"core\/image","attrs":{"id":30035,"sizeSlug":"large","linkDestination":"none","epAnimationGeneratedClass":"edplus_anim-4mSqhB","epGeneratedClass":"eplus-wrapper"},"innerBlocks":[],"innerHTML":"\n<figure class=\"wp-block-image size-large eplus-wrapper\"><img src=\"https:\/\/sano.science\/wp-content\/uploads\/2026\/03\/A-non-local-diffusion-magnetic-resonance-imaging-tract-density-biomarker-to-stratify-predict-and-interpret-survival-rates-in-human-glioblastoma-1024x821.jpeg\" alt=\"The lesion-tract density index (L\u2009-TDI): a survival marker in human GBM. (A) For every subject, the data were normalized to a common template. The T2-weighted image was chosen as the reference modality, and the GBM was inversely masked to discard distorted tissue during the optimization. (B) The normalized tumor mask is used in combination with the whole brain normative tractogram to extract the set of streamlines that intersect the tumor in the same template space as in (A). (C) The lesion-tract density map (L\u2009-TDM) provides a unique white matter density map describing the tracts in (B) that interact with the GBM. (D) From the L\u2009-TDM, we can define the L\u2009-TDI marker by averaging the tract density within the L\u2009-TDM binary mask in (C). For a given cohort, the sample can be stratified according to a given percentile. (E) Once a stratification threshold has been set, we conduct thorough tests to assess the discovery of the biomarker. Additional survival analyses on multiple stratification thresholds help determine whether the potential biomarker holds prognostic value. The L\u2009-TDI can also be used to characterize both morphological and anatomical landscapes in GBMs, which can be used to understand differences in the survival rates. Once a robust effect has been identified, the L\u2009-TDI can be incorporated into standard risk analysis and predictive frameworks to improve patient care.\" class=\"wp-image-30035\"\/><figcaption class=\"wp-element-caption\">The lesion-tract density index (L\u2009-TDI): a survival marker in human GBM. (A) For every subject, the data were normalized to a common template. The T2-weighted image was chosen as the reference modality, and the GBM was inversely masked to discard distorted tissue during the optimization. (B) The normalized tumor mask is used in combination with the whole brain normative tractogram to extract the set of streamlines that intersect the tumor in the same template space as in (A). (C) The lesion-tract density map (L\u2009-TDM) provides a unique white matter density map describing the tracts in (B) that interact with the GBM. (D) From the L\u2009-TDM, we can define the L\u2009-TDI marker by averaging the tract density within the L\u2009-TDM binary mask in (C). For a given cohort, the sample can be stratified according to a given percentile. (E) Once a stratification threshold has been set, we conduct thorough tests to assess the discovery of the biomarker. Additional survival analyses on multiple stratification thresholds help determine whether the potential biomarker holds prognostic value. The L\u2009-TDI can also be used to characterize both morphological and anatomical landscapes in GBMs, which can be used to understand differences in the survival rates. Once a robust effect has been identified, the L\u2009-TDI can be incorporated into standard risk analysis and predictive frameworks to improve patient care.<\/figcaption><\/figure>\n","innerContent":["\n<figure class=\"wp-block-image size-large eplus-wrapper\"><img src=\"https:\/\/sano.science\/wp-content\/uploads\/2026\/03\/A-non-local-diffusion-magnetic-resonance-imaging-tract-density-biomarker-to-stratify-predict-and-interpret-survival-rates-in-human-glioblastoma-1024x821.jpeg\" alt=\"The lesion-tract density index (L\u2009-TDI): a survival marker in human GBM. (A) For every subject, the data were normalized to a common template. The T2-weighted image was chosen as the reference modality, and the GBM was inversely masked to discard distorted tissue during the optimization. (B) The normalized tumor mask is used in combination with the whole brain normative tractogram to extract the set of streamlines that intersect the tumor in the same template space as in (A). (C) The lesion-tract density map (L\u2009-TDM) provides a unique white matter density map describing the tracts in (B) that interact with the GBM. (D) From the L\u2009-TDM, we can define the L\u2009-TDI marker by averaging the tract density within the L\u2009-TDM binary mask in (C). For a given cohort, the sample can be stratified according to a given percentile. (E) Once a stratification threshold has been set, we conduct thorough tests to assess the discovery of the biomarker. Additional survival analyses on multiple stratification thresholds help determine whether the potential biomarker holds prognostic value. The L\u2009-TDI can also be used to characterize both morphological and anatomical landscapes in GBMs, which can be used to understand differences in the survival rates. Once a robust effect has been identified, the L\u2009-TDI can be incorporated into standard risk analysis and predictive frameworks to improve patient care.\" class=\"wp-image-30035\"\/><figcaption class=\"wp-element-caption\">The lesion-tract density index (L\u2009-TDI): a survival marker in human GBM. (A) For every subject, the data were normalized to a common template. The T2-weighted image was chosen as the reference modality, and the GBM was inversely masked to discard distorted tissue during the optimization. (B) The normalized tumor mask is used in combination with the whole brain normative tractogram to extract the set of streamlines that intersect the tumor in the same template space as in (A). (C) The lesion-tract density map (L\u2009-TDM) provides a unique white matter density map describing the tracts in (B) that interact with the GBM. (D) From the L\u2009-TDM, we can define the L\u2009-TDI marker by averaging the tract density within the L\u2009-TDM binary mask in (C). For a given cohort, the sample can be stratified according to a given percentile. (E) Once a stratification threshold has been set, we conduct thorough tests to assess the discovery of the biomarker. Additional survival analyses on multiple stratification thresholds help determine whether the potential biomarker holds prognostic value. The L\u2009-TDI can also be used to characterize both morphological and anatomical landscapes in GBMs, which can be used to understand differences in the survival rates. Once a robust effect has been identified, the L\u2009-TDI can be incorporated into standard risk analysis and predictive frameworks to improve patient care.<\/figcaption><\/figure>\n"]}],"meta_data":{"has_thumbnail_pattern":false,"share_on_social_media":{"has_social_media":false}},"featured_image":{"url":"https:\/\/sano.science\/wp-content\/uploads\/2026\/03\/A-non-local-diffusion-magnetic-resonance-imaging-tract-density-biomarker-to-stratify-predict-and-interpret-survival-rates-in-human-glioblastoma-1024x821.jpeg"},"main_category":{"name":"Uncategorized"},"prev_page":{"slug":"sano-participates-in-open-h-embodiment"},"next_page":{"slug":"denoising-of-ct-and-mri-images-using-decomposition-based-curvelet-thresholding-and-classical-filtering-techniques"},"_links":{"self":[{"href":"https:\/\/sano.science\/index.php\/wp-json\/wp\/v2\/posts\/30033","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sano.science\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sano.science\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sano.science\/index.php\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/sano.science\/index.php\/wp-json\/wp\/v2\/comments?post=30033"}],"version-history":[{"count":10,"href":"https:\/\/sano.science\/index.php\/wp-json\/wp\/v2\/posts\/30033\/revisions"}],"predecessor-version":[{"id":30059,"href":"https:\/\/sano.science\/index.php\/wp-json\/wp\/v2\/posts\/30033\/revisions\/30059"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sano.science\/index.php\/wp-json\/wp\/v2\/media\/30035"}],"wp:attachment":[{"href":"https:\/\/sano.science\/index.php\/wp-json\/wp\/v2\/media?parent=30033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sano.science\/index.php\/wp-json\/wp\/v2\/categories?post=30033"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sano.science\/index.php\/wp-json\/wp\/v2\/tags?post=30033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}