Publications 2022

Eide PK, Lashkarivand A, Hagen-Kersten ÅA, Gjertsen Ø, Nedregaard B, Sletteberg R, Løvland G, Vatnehol SAS, Pripp AH, Valnes LM, Ringstad G (2022)
Intrathecal Contrast-Enhanced Magnetic Resonance Imaging of Cerebrospinal Fluid Dynamics and Glymphatic Enhancement in Idiopathic Normal Pressure Hydrocephalus
Front Neurol, 13, 857328
DOI 10.3389/fneur.2022.857328, PubMed 35463139

Eide PK, Pripp AH, Berge B, Hrubos-Strøm H, Ringstad G, Valnes LM (2022)
Altered glymphatic enhancement of cerebrospinal fluid tracer in individuals with chronic poor sleep quality
J Cereb Blood Flow Metab, 42 (9), 1676-1692
DOI 10.1177/0271678X221090747, PubMed 35350917

Hornkjøl M, Valnes LM, Ringstad G, Rognes ME, Eide PK, Mardal KA, Vinje V (2022)
CSF circulation and dispersion yield rapid clearance from intracranial compartments
Front Bioeng Biotechnol, 10, 932469
DOI 10.3389/fbioe.2022.932469, PubMed 36172015

Hovd MH, Mariussen E, Uggerud H, Lashkarivand A, Christensen H, Ringstad G, Eide PK (2022)
Population pharmacokinetic modeling of CSF to blood clearance: prospective tracer study of 161 patients under work-up for CSF disorders
Fluids Barriers CNS, 19 (1), 55
DOI 10.1186/s12987-022-00352-w, PubMed 35778719

Ringstad G, Eide PK (2022)
Molecular trans-dural efflux to skull bone marrow in humans with CSF disorders
Brain, 145 (4), 1464-1472
DOI 10.1093/brain/awab388, PubMed 34849609

Zapf B, Haubner J, Kuchta M, Ringstad G, Eide PK, Mardal KA (2022)
Investigating molecular transport in the human brain from MRI with physics-informed neural networks
Sci Rep, 12 (1), 15475
DOI 10.1038/s41598-022-19157-w, PubMed 36104360

Publications 2021

Eide PK, Mariussen E, Uggerud H, Pripp AH, Lashkarivand A, Hassel B, Christensen H, Hovd MH, Ringstad G (2021)
Clinical application of intrathecal gadobutrol for assessment of cerebrospinal fluid tracer clearance to blood
JCI Insight, 6 (9)
DOI 10.1172/jci.insight.147063, PubMed 33822769

Eide PK, Pripp AH, Ringstad G, Valnes LM (2021)
Impaired glymphatic function in idiopathic intracranial hypertension
Brain Commun, 3 (2), fcab043
DOI 10.1093/braincomms/fcab043, PubMed 34235434

Eide PK, Ringstad G (2021)
Cerebrospinal fluid egress to human parasagittal dura and the impact of sleep deprivation
Brain Res, 1772, 147669
DOI 10.1016/j.brainres.2021.147669, PubMed 34587499

Eide PK, Valnes LM, Lindstrøm EK, Mardal KA, Ringstad G (2021)
Direction and magnitude of cerebrospinal fluid flow vary substantially across central nervous system diseases
Fluids Barriers CNS, 18 (1), 16
DOI 10.1186/s12987-021-00251-6, PubMed 33794929

Eide PK, Vinje V, Pripp AH, Mardal KA, Ringstad G (2021)
Sleep deprivation impairs molecular clearance from the human brain
Brain, 144 (3), 863-874
DOI 10.1093/brain/awaa443, PubMed 33829232

Ringstad G, Eide PK (2021)
Safety of Intrathecal Gadolinium-based Contrast Agents and Benefit versus Risk
Radiology, 299 (1), E223-E224
DOI 10.1148/radiol.2021203351, PubMed 33591893

Publications 2020

Eide PK, Pripp AH, Ringstad G (2020)
<b>Magnetic resonance imaging biomarkers of cerebrospinal fluid tracer dynamics</b> <b>in idiopathic normal pressure hydrocephalus</b>
Brain Commun, 2 (2), fcaa187
DOI 10.1093/braincomms/fcaa187, PubMed 33381757

Halvorsen M, Edeklev CS, Fraser-Green J, Løvland G, Vatnehol SAS, Gjertsen Ø, Nedregaard B, Sletteberg R, Ringstad G, Eide PK (2020)
Off-label intrathecal use of gadobutrol: safety study and comparison of administration protocols
Neuroradiology, 63 (1), 51-61
DOI 10.1007/s00234-020-02519-4, PubMed 32803338

Jacobsen HH, Sandell T, Jørstad ØK, Moe MC, Ringstad G, Eide PK (2020)
In Vivo Evidence for Impaired Glymphatic Function in the Visual Pathway of Patients With Normal Pressure Hydrocephalus
Invest Ophthalmol Vis Sci, 61 (13), 24
DOI 10.1167/iovs.61.13.24, PubMed 33201186

Kolnes AJ, Øystese KAB, Olarescu NC, Ringstad G, Berg-Johnsen J, Casar-Borota O, Bollerslev J, Jørgensen AP (2020)
FSH Levels Are Related to E-cadherin Expression and Subcellular Location in Nonfunctioning Pituitary Tumors
J Clin Endocrinol Metab, 105 (8), 2587-94
DOI 10.1210/clinem/dgaa281, PubMed 32421791

Lashkarivand A, Ringstad G, Eide PK (2020)
Surgery for Brainstem Cavernous Malformations: Association between Preoperative Grade and Postoperative Quality of Life
Oper Neurosurg (Hagerstown), 18 (6), 590-598
DOI 10.1093/ons/opz337, PubMed 31768544

Melin E, Eide PK, Ringstad G (2020)
In vivo assessment of cerebrospinal fluid efflux to nasal mucosa in humans
Sci Rep, 10 (1), 14974
DOI 10.1038/s41598-020-72031-5, PubMed 32917953

Ringstad G, Eide PK (2020)
Glymphatic MRI
Tidsskr Nor Laegeforen, 140 (1)
DOI 10.4045/tidsskr.19.0651, PubMed 31948208

Ringstad G, Eide PK (2020)
Cerebrospinal fluid tracer efflux to parasagittal dura in humans
Nat Commun, 11 (1), 354
DOI 10.1038/s41467-019-14195-x, PubMed 31953399

Ringstad G, Eide PK (2020)
Glymphatic MRI
Tidsskr. Nor. Laegeforen., 140 (1), 69

Valnes LM, Mitusch SK, Ringstad G, Eide PK, Funke SW, Mardal KA (2020)
Apparent diffusion coefficient estimates based on 24 hours tracer movement support glymphatic transport in human cerebral cortex
Sci Rep, 10 (1), 9176
DOI 10.1038/s41598-020-66042-5, PubMed 32514105

Publications 2019

Edeklev CS, Halvorsen M, Løvland G, Vatnehol SAS, Gjertsen Ø, Nedregaard B, Sletteberg R, Ringstad G, Eide PK (2019)
Intrathecal Use of Gadobutrol for Glymphatic MR Imaging: Prospective Safety Study of 100 Patients
AJNR Am J Neuroradiol, 40 (8), 1257-1264
DOI 10.3174/ajnr.A6136, PubMed 31320462

Eide PK, Ringstad G (2019)
In Vivo Imaging of Molecular Clearance From Human Entorhinal Cortex: A Possible Method for Preclinical Testing of Dementia
Gerontol Geriatr Med, 5, 2333721419889739
DOI 10.1177/2333721419889739, PubMed 31819895

Eide PK, Valnes LM, Pripp AH, Mardal KA, Ringstad G (2019)
Delayed clearance of cerebrospinal fluid tracer from choroid plexus in idiopathic normal pressure hydrocephalus
J Cereb Blood Flow Metab, 40 (9), 1849-1858
DOI 10.1177/0271678X19874790, PubMed 31495299

Fric R, Ringstad G, Eide PK (2019)
[Chiari malformation type 1 – diagnosis and treatment]
Tidsskr Nor Laegeforen, 139 (10)
DOI 10.4045/tidsskr.18.0455, PubMed 31238671

Fric R, Ringstad G, Eide PK (2019)
Chiari malformation type 1- diagnostics and treatment
Tidsskr. Nor. Laegeforen., 139 (10), 931-935

Jacobsen HH, Ringstad G, Jørstad ØK, Moe MC, Sandell T, Eide PK (2019)
The Human Visual Pathway Communicates Directly With the Subarachnoid Space
Invest Ophthalmol Vis Sci, 60 (7), 2773-2780
DOI 10.1167/iovs.19-26997, PubMed 31247084

Vinje V, Ringstad G, Lindstrøm EK, Valnes LM, Rognes ME, Eide PK, Mardal KA (2019)
Respiratory influence on cerebrospinal fluid flow - a computational study based on long-term intracranial pressure measurements
Sci Rep, 9 (1), 9732
DOI 10.1038/s41598-019-46055-5, PubMed 31278278

Publications 2018

de la Rosa Carrillo D, Vindenes H, Kinsler VA, Rønnestad A, Ringstad G, Müller LO, Tafjord S, Tønseth KA, Kvamme B, Clausen OPF (2018)
Aggressive melanoma in an infant with congenital melanocytic nevus syndrome and multiple, NRAS and BRAF mutation-negative nodules
Pediatr Dermatol, 35 (5), e281-e285
DOI 10.1111/pde.13595, PubMed 29999207

Eide PK, Ringstad G (2018)
Delayed clearance of cerebrospinal fluid tracer from entorhinal cortex in idiopathic normal pressure hydrocephalus: A glymphatic magnetic resonance imaging study
J Cereb Blood Flow Metab, 39 (7), 1355-1368
DOI 10.1177/0271678X18760974, PubMed 29485341

Eide PK, Sorteberg A, Sorteberg W, Lindstrøm EK, Mardal KA, Ringstad G (2018)
"Bucket" cerebrospinal fluid bulk flow: when the terrain disagrees with the map
Acta Neurochir (Wien), 161 (2), 259-261
DOI 10.1007/s00701-018-3775-6, PubMed 30560378

Eide PK, Vatnehol SAS, Emblem KE, Ringstad G (2018)
Magnetic resonance imaging provides evidence of glymphatic drainage from human brain to cervical lymph nodes
Sci Rep, 8 (1), 7194
DOI 10.1038/s41598-018-25666-4, PubMed 29740121

Lindstrøm EK, Ringstad G, Mardal KA, Eide PK (2018)
Cerebrospinal fluid volumetric net flow rate and direction in idiopathic normal pressure hydrocephalus
Neuroimage Clin, 20, 731-741
DOI 10.1016/j.nicl.2018.09.006, PubMed 30238917

Lindstrøm EK, Ringstad G, Sorteberg A, Sorteberg W, Mardal KA, Eide PK (2018)
Magnitude and direction of aqueductal cerebrospinal fluid flow: large variations in patients with intracranial aneurysms with or without a previous subarachnoid hemorrhage
Acta Neurochir (Wien), 161 (2), 247-256
DOI 10.1007/s00701-018-3730-6, PubMed 30443816

Ringstad G, Valnes LM, Dale AM, Pripp AH, Vatnehol SS, Emblem KE, Mardal KA, Eide PK (2018)
Brain-wide glymphatic enhancement and clearance in humans assessed with MRI
JCI Insight, 3 (13)
DOI 10.1172/jci.insight.121537, PubMed 29997300

Øystese KAB, Hisanawi S, Zucknick M, Bollerslev J, Ringstad G (2018)
Are volume measurements of non-functioning pituitary adenomas reliable?
Endocrine, 63 (1), 171-176
DOI 10.1007/s12020-018-1752-8, PubMed 30259294

Publications 2017

Jain K, Ringstad G, Eide PK, Mardal KA (2017)
Direct numerical simulation of transitional hydrodynamics of the cerebrospinal fluid in Chiari I malformation: The role of cranio-vertebral junction
Int J Numer Method Biomed Eng, 33 (9)
DOI 10.1002/cnm.2853, PubMed 27863152

Ringstad G, Lindstrøm EK, Vatnehol SAS, Mardal KA, Emblem KE, Eide PK (2017)
Non-invasive assessment of pulsatile intracranial pressure with phase-contrast magnetic resonance imaging
PLoS One, 12 (11), e0188896
DOI 10.1371/journal.pone.0188896, PubMed 29190788

Ringstad G, Vatnehol SAS, Eide PK (2017)
Glymphatic MRI in idiopathic normal pressure hydrocephalus
Brain, 140 (10), 2691-2705
DOI 10.1093/brain/awx191, PubMed 28969373

Øystese KA, Zucknick M, Casar-Borota O, Ringstad G, Bollerslev J (2017)
Early postoperative growth in non-functioning pituitary adenomas; A tool to tailor safe follow-up
Endocrine, 57 (1), 35-45
DOI 10.1007/s12020-017-1314-5, PubMed 28516382

Publications 2016

Eide PK, Ringstad G (2016)
Increased pulsatile intracranial pressure in patients with symptomatic pineal cysts and magnetic resonance imaging biomarkers indicative of central venous hypertension
J Neurol Sci, 367, 247-55
DOI 10.1016/j.jns.2016.06.028, PubMed 27423599

Eide PK, Ringstad G (2016)
Results of surgery in symptomatic non-hydrocephalic pineal cysts: role of magnetic resonance imaging biomarkers indicative of central venous hypertension
Acta Neurochir (Wien), 159 (2), 349-361
DOI 10.1007/s00701-016-3029-4, PubMed 27878615

Farmen AH, Ringstad G, Kerty E (2016)
[Idiopathic intracranial hypertension as a cause of headache]
Tidsskr Nor Laegeforen, 136 (22), 1895-1898
DOI 10.4045/tidsskr.16.0222, PubMed 27929555

Kurz KD, Ringstad G, Odland A, Advani R, Farbu E, Kurz MW (2016)
Radiological imaging in acute ischaemic stroke
Eur J Neurol, 23 Suppl 1, 8-17
DOI 10.1111/ene.12849, PubMed 26563093

Publications 2015

Eide PK, Ringstad G (2015)
MRI with intrathecal MRI gadolinium contrast medium administration: a possible method to assess glymphatic function in human brain
Acta Radiol Open, 4 (11), 2058460115609635
DOI 10.1177/2058460115609635, PubMed 26634147

Heck A, Emblem KE, Casar-Borota O, Bollerslev J, Ringstad G (2015)
Quantitative analyses of T2-weighted MRI as a potential marker for response to somatostatin analogs in newly diagnosed acromegaly
Endocrine, 52 (2), 333-43
DOI 10.1007/s12020-015-0766-8, PubMed 26475495

Heck A, Emblem KE, Casar-Borota O, Ringstad G, Bollerslev J (2015)
MRI T2 characteristics in somatotroph adenomas following somatostatin analog treatment in acromegaly
Endocrine, 53 (1), 327-30
DOI 10.1007/s12020-015-0816-2, PubMed 26615593

Ringstad G, Emblem KE, Eide PK (2015)
Phase-contrast magnetic resonance imaging reveals net retrograde aqueductal flow in idiopathic normal pressure hydrocephalus
J Neurosurg, 124 (6), 1850-7
DOI 10.3171/2015.6.JNS15496, PubMed 26636385

Ringstad G, Emblem KE, Geier O, Alperin N, Eide PK (2015)
Aqueductal Stroke Volume: Comparisons with Intracranial Pressure Scores in Idiopathic Normal Pressure Hydrocephalus
AJNR Am J Neuroradiol, 36 (9), 1623-30
DOI 10.3174/ajnr.A4340, PubMed 25977480

Ringstad G, Emblem KE, Geier O, Alperin N, Eide PK (2015)
Reply: To PMID 25977480
AJNR Am J Neuroradiol, 36 (9), 1633-4
DOI 10.3174/ajnr.A4488, PubMed 26251437

Publications 2014

Lilleby V, Haydon J, Sanner H, Krossness BK, Ringstad G, Flatø B (2014)
Severe macrophage activation syndrome and central nervous system involvement in juvenile dermatomyositis
Scand J Rheumatol, 43 (2), 171-3
DOI 10.3109/03009742.2013.863968, PubMed 24588361

Mochol M, Berg K, Midtvedt Ø, Ringstad G, Kerty E (2014)
[Woman with recurrent uveitis and neurological symptoms]
Tidsskr Nor Laegeforen, 134 (12-13), 1245-8
DOI 10.4045/tidsskr.13.0433, PubMed 24989204

Publications 2013

Lekva T, Berg JP, Heck A, Lyngvi Fougner S, Olstad OK, Ringstad G, Bollerslev J, Ueland T (2013)
Attenuated RORC expression in the presence of EMT progression in somatotroph adenomas following treatment with somatostatin analogs is associated with poor clinical recovery
PLoS One, 8 (6), e66927
DOI 10.1371/journal.pone.0066927, PubMed 23825587

Lekva T, Berg JP, Lyle R, Heck A, Ringstad G, Olstad OK, Michelsen AE, Casar-Borota O, Bollerslev J, Ueland T (2013)
Epithelial splicing regulator protein 1 and alternative splicing in somatotroph adenomas
Endocrinology, 154 (9), 3331-43
DOI 10.1210/en.2013-1051, PubMed 23825128

Publications 2012

Heck A, Ringstad G, Fougner SL, Casar-Borota O, Nome T, Ramm-Pettersen J, Bollerslev J (2012)
Intensity of pituitary adenoma on T2-weighted magnetic resonance imaging predicts the response to octreotide treatment in newly diagnosed acromegaly
Clin Endocrinol (Oxf), 77 (1), 72-8
DOI 10.1111/j.1365-2265.2011.04286.x, PubMed 22066905

Jusufovic M, Sandset EC, Popperud TH, Solberg S, Ringstad G, Kerty E (2012)
An unusual case of the syndrome of cervical rib with subclavian artery thrombosis and cerebellar and cerebral infarctions
BMC Neurol, 12, 48
DOI 10.1186/1471-2377-12-48, PubMed 22741548

Publications 2010

Abildgaard A, Witwit AK, Karlsen JS, Jacobsen EA, Tennøe B, Ringstad G, Due-Tønnessen P (2010)
An autostereoscopic 3D display can improve visualization of 3D models from intracranial MR angiography
Int J Comput Assist Radiol Surg, 5 (5), 549-54
DOI 10.1007/s11548-010-0509-5, PubMed 20652646

Publications 2007

Sandvand KA, Ringstad G, Kerty E (2007)
Periodic abducens nerve palsy in adults caused by neurovascular compression
J Neurol Neurosurg Psychiatry, 79 (1), 100-2
DOI 10.1136/jnnp.2007.124321, PubMed 17717022

Publications 2006

Ringstad G, Holmquist H, Brabrand K, Aaløkken TM, Hauge T (2006)
[CT colonography: a new method for detecting colorectal cancer and polyps]
Tidsskr Nor Laegeforen, 126 (11), 1470-3
PubMed 16732340

Publications 2003

Hansen EH, Ringstad G (2003)
Bonitetsutvikling og avvik mellom plan og kontroll
[Forfatterne], Ås, 47 bl.
BIBSYS 040859177