Geir Andre Ringstad

  • Consultant Neuroradiologist MD, PhD
  • +47 23 07 15 73
 

Author network for Geir Andre Ringstad by COREMINE medical


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, 271678X18760974 (in press)
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) (in press)
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) (in press)
DOI 10.1007/s00701-018-3730-6, PubMed 30443816

Lindstrøm EK, Schreiner J, Ringstad GA, Haughton V, Eide PK, Mardal KA (2018)
Comparison of phase-contrast MR and flow simulations for the study of CSF dynamics in the cervical spine
Neuroradiol J, 31 (3), 292-298
DOI 10.1177/1971400918759812, PubMed 29464985

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), e121537
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

Brix MK, Westman E, Simmons A, Ringstad GA, Eide PK, Wagner-Larsen K, Page CM, Vitelli V, Beyer MK (2017)
The Evans' Index revisited: New cut-off levels for use in radiological assessment of ventricular enlargement in the elderly
Eur J Radiol, 95, 28-32
DOI 10.1016/j.ejrad.2017.07.013, PubMed 28987681

Gadde JA, Shah V, Liebo GB, Ringstad GA, Pomeraniec IJ, Bakke SJ, Fric R, Ksendzovsky A, Jane JA, Schwartz ES, Haughton V (2017)
Anatomical features of the cervical spinal canal in Chiari I deformity with presyrinx: A case-control study
Neuroradiol J, 30 (5), 405-409
DOI 10.1177/1971400917718842, PubMed 28691569

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, Pripp AH, Ringstad GA (2016)
Magnetic resonance imaging biomarkers indicate a central venous hypertension syndrome in patients with symptomatic pineal cysts
J Neurol Sci, 363, 207-16
DOI 10.1016/j.jns.2016.02.038, PubMed 27000252

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

Frič R, Lindstrøm EK, Ringstad GA, Mardal KA, Eide PK (2016)
The association between the pulse pressure gradient at the cranio-cervical junction derived from phase-contrast magnetic resonance imaging and invasively measured pulsatile intracranial pressure in symptomatic patients with Chiari malformation type 1
Acta Neurochir (Wien), 158 (12), 2295-2304
DOI 10.1007/s00701-016-2979-x, PubMed 27743249

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

Støverud KH, Langtangen HP, Ringstad GA, Eide PK, Mardal KA (2016)
Computational Investigation of Cerebrospinal Fluid Dynamics in the Posterior Cranial Fossa and Cervical Subarachnoid Space in Patients with Chiari I Malformation
PLoS One, 11 (10), e0162938
DOI 10.1371/journal.pone.0162938, PubMed 27727298

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)
Reply: To PMID 25977480
AJNR Am J Neuroradiol, 36 (9), 1633-4
DOI 10.3174/ajnr.A4488, PubMed 26251437

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

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

Sandell T, Ringstad GA, Eide PK (2014)
Usefulness of the endoscope in microvascular decompression for trigeminal neuralgia and MRI-based prediction of the need for endoscopy
Acta Neurochir (Wien), 156 (10), 1901-9; discussion 1909
DOI 10.1007/s00701-014-2171-0, PubMed 25008460

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 2011

Pihlstrøm L, Alfstad KÅ, Solyga V, Ringstad GA, Kerty E (2011)
[A 55-year old man with recurrent brain infarction]
Tidsskr Nor Laegeforen, 131 (11), 1089-91
DOI 10.4045/tidsskr.10.0162, PubMed 21681238

Ringstad GA, Emblem KE, Holland D, Dale AM, Bjornerud A, Hald JK (2011)
Assessment of pituitary adenoma volumetric change using longitudinal MR image registration
Neuroradiology, 54 (5), 435-43
DOI 10.1007/s00234-011-0894-7, PubMed 21647587

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

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