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  1. Article ; Online: Thalamic venous infarction from trauma mimicking a glioma.

    Smith, Kelsey M / Rydberg, Charlotte H / Hocker, Sara E

    Clinical imaging

    2020  Volume 73, Page(s) 23–25

    Abstract: Traumatic brain injuries (TBI) are commonly associated with motor vehicle accidents. Neuroimaging plays a crucial role in the initial management of TBIs. We present a case of a TBI related to a motor vehicle accident in an 18-year-old woman. Initial ... ...

    Abstract Traumatic brain injuries (TBI) are commonly associated with motor vehicle accidents. Neuroimaging plays a crucial role in the initial management of TBIs. We present a case of a TBI related to a motor vehicle accident in an 18-year-old woman. Initial brain imaging revealed significant traumatic injuries and an enhancing mass, without restricted diffusion, in the thalamus favored to be a thalamic glioma. Subsequent imaging revealed resolution of enhancement of the thalamic lesion and reduction in size. On review of the original imaging, it was determined that the thalamic lesion was related to a tear and partial thrombosis of a large thalamic vein resulting in infarction and hemorrhage.
    MeSH term(s) Adolescent ; Brain ; Female ; Glioma/diagnostic imaging ; Humans ; Infarction ; Neuroimaging ; Thalamus/diagnostic imaging
    Language English
    Publishing date 2020-12-03
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 1028123-x
    ISSN 1873-4499 ; 0899-7071
    ISSN (online) 1873-4499
    ISSN 0899-7071
    DOI 10.1016/j.clinimag.2020.11.045
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Radiology-pathology correlation: Giant tumefactive perivascular spaces.

    Benson, John C / Trejo-Lopez, Jorge A / Cormier, Jason L / Parney, Ian F / Mark, Ian T / Madhavan, Ajay A / Kotsenas, Amy L / Rydberg, Charlotte H / Luetmer, Patrick H / Eckel, Laurence J / Johnson, Derek R

    The neuroradiology journal

    2024  , Page(s) 19714009241247459

    Abstract: Dilated perivascular spaces (PVSs) are common and easily recognized on imaging. However, rarer giant tumefactive PVSs (GTPVSs) can have unusual multilocular cystic configurations, and are often confused for other pathologic entities, including neoplasms, ...

    Abstract Dilated perivascular spaces (PVSs) are common and easily recognized on imaging. However, rarer giant tumefactive PVSs (GTPVSs) can have unusual multilocular cystic configurations, and are often confused for other pathologic entities, including neoplasms, cystic infarctions, and neuroepithelial cysts. Because GTPVSs are scarcely encountered and even more infrequently operated upon, many radiologists are unaware of the imaging and pathologic features of these lesions. Here, a case of a resected GTPVS is presented, highlighting both its radiologic and histologic characteristics, and discussing how such lesions can be differentiated from their closest mimickers on imaging.
    Language English
    Publishing date 2024-04-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2257770-1
    ISSN 2385-1996 ; 1971-4009 ; 1120-9976
    ISSN (online) 2385-1996
    ISSN 1971-4009 ; 1120-9976
    DOI 10.1177/19714009241247459
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Diffuse large B cell lymphoma involving Meckel's cave masquerading as biopsy-negative giant cell arteritis: a case report.

    Samec, Matthew J / Madrigal, Andres G / Rydberg, Charlotte H / Koster, Matthew J

    Journal of medical case reports

    2020  Volume 14, Issue 1, Page(s) 57

    Abstract: Background: Given the absence of consensus diagnostic criteria for giant cell arteritis, clinicians may encounter difficulty with identification of new-onset headache in patients older than age 50 years presenting with visual changes and elevated ... ...

    Abstract Background: Given the absence of consensus diagnostic criteria for giant cell arteritis, clinicians may encounter difficulty with identification of new-onset headache in patients older than age 50 years presenting with visual changes and elevated inflammatory markers, particularly if temporal artery biopsies are performed and negative.
    Case presentation: We present a case of a 57-year-old white man with headache, diplopia, and jaw paresthesia initially diagnosed and managed as steroid-refractory biopsy-negative giant cell arteritis. Further investigation disclosed evidence of soft tissue infiltration into Meckel's (trigeminal) cave bilaterally. Positron emission tomography suggested the presence of a lymphoproliferative disorder. Histology confirmed the diagnosis of diffuse large B cell lymphoma.
    Conclusions: Metastatic involvement in Meckel's cave in diffuse large B cell lymphoma is extremely rare and presents a diagnostic challenge. Patients with suspicion of giant cell arteritis should undergo advanced imaging, particularly those with negative biopsy, atypical features, or lack of response to standard therapy, in order to assess for the presence of large-vessel vasculitis or other mimicking pathologies.
    MeSH term(s) Diagnosis, Differential ; Giant Cell Arteritis/diagnosis ; Headache Disorders/etiology ; Humans ; Lymphoma, Large B-Cell, Diffuse/diagnosis ; Lymphoma, Large B-Cell, Diffuse/pathology ; Male ; Middle Aged ; Positron Emission Tomography Computed Tomography ; Skull Base Neoplasms/complications ; Skull Base Neoplasms/diagnostic imaging ; Skull Base Neoplasms/pathology ; Skull Base Neoplasms/secondary
    Language English
    Publishing date 2020-05-10
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 2269805-X
    ISSN 1752-1947 ; 1752-1947
    ISSN (online) 1752-1947
    ISSN 1752-1947
    DOI 10.1186/s13256-020-02379-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Multiple methods to identify the central sulcus and peri-rolandic cortex with double inversion recovery (DIR) MRI.

    Lehman, Vance T / Mark, Ian T / Rydberg, Charlotte H / Luetmer, Patrick H / Witte, Robert J / Geske, Jennifer R / Johnson, Matthew P

    Neuroradiology

    2021  Volume 63, Issue 9, Page(s) 1393–1394

    MeSH term(s) Cerebral Cortex ; Humans ; Magnetic Resonance Imaging
    Language English
    Publishing date 2021-07-09
    Publishing country Germany
    Document type Letter
    ZDB-ID 123305-1
    ISSN 1432-1920 ; 0028-3940
    ISSN (online) 1432-1920
    ISSN 0028-3940
    DOI 10.1007/s00234-021-02763-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Clinical 7-T MRI for neuroradiology: strengths, weaknesses, and ongoing challenges.

    Burkett, Brian J / Fagan, Andrew J / Felmlee, Joel P / Black, David F / Lane, John I / Port, John D / Rydberg, Charlotte H / Welker, Kirk M

    Neuroradiology

    2021  Volume 63, Issue 2, Page(s) 167–177

    Abstract: Since the relatively recent regulatory approval for clinical use in both Europe and North America, 7-Tesla (T) MRI has been adopted for clinical practice at our institution. Based on this experience, this article reviews the unique features of 7-T MRI ... ...

    Abstract Since the relatively recent regulatory approval for clinical use in both Europe and North America, 7-Tesla (T) MRI has been adopted for clinical practice at our institution. Based on this experience, this article reviews the unique features of 7-T MRI neuroimaging and addresses the challenges of establishing a 7-T MRI clinical practice. The underlying fundamental physics principals of high-field strength MRI are briefly reviewed. Scanner installation, safety considerations, and artifact mitigation techniques are discussed. Seven-tesla MRI case examples of neurologic diseases including epilepsy, vascular abnormalities, and tumor imaging are presented to illustrate specific applications of 7-T MRI. The advantages of 7-T MRI in conjunction with advanced neuroimaging techniques such as functional MRI are presented. Seven-tesla MRI produces more detailed information and, in some cases, results in specific diagnoses where previous 3-T studies were insufficient. Still, persistent technical issues for 7-T scanning present ongoing challenges for radiologists.
    Language English
    Publishing date 2021-01-02
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 123305-1
    ISSN 1432-1920 ; 0028-3940
    ISSN (online) 1432-1920
    ISSN 0028-3940
    DOI 10.1007/s00234-020-02629-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Agreement between neuroimages and reports for natural language processing-based detection of silent brain infarcts and white matter disease.

    Leung, Lester Y / Fu, Sunyang / Luetmer, Patrick H / Kallmes, David F / Madan, Neel / Weinstein, Gene / Lehman, Vance T / Rydberg, Charlotte H / Nelson, Jason / Liu, Hongfang / Kent, David M

    BMC neurology

    2021  Volume 21, Issue 1, Page(s) 189

    Abstract: Background: There are numerous barriers to identifying patients with silent brain infarcts (SBIs) and white matter disease (WMD) in routine clinical care. A natural language processing (NLP) algorithm may identify patients from neuroimaging reports, but ...

    Abstract Background: There are numerous barriers to identifying patients with silent brain infarcts (SBIs) and white matter disease (WMD) in routine clinical care. A natural language processing (NLP) algorithm may identify patients from neuroimaging reports, but it is unclear if these reports contain reliable information on these findings.
    Methods: Four radiology residents reviewed 1000 neuroimaging reports (RI) of patients age > 50 years without clinical histories of stroke, TIA, or dementia for the presence, acuity, and location of SBIs, and the presence and severity of WMD. Four neuroradiologists directly reviewed a subsample of 182 images (DR). An NLP algorithm was developed to identify findings in reports. We assessed interrater reliability for DR and RI, and agreement between these two and with NLP.
    Results: For DR, interrater reliability was moderate for the presence of SBIs (k = 0.58, 95 % CI 0.46-0.69) and WMD (k = 0.49, 95 % CI 0.35-0.63), and moderate to substantial for characteristics of SBI and WMD. Agreement between DR and RI was substantial for the presence of SBIs and WMD, and fair to substantial for characteristics of SBIs and WMD. Agreement between NLP and DR was substantial for the presence of SBIs (k = 0.64, 95 % CI 0.53-0.76) and moderate (k = 0.52, 95 % CI 0.39-0.65) for the presence of WMD.
    Conclusions: Neuroimaging reports in routine care capture the presence of SBIs and WMD. An NLP can identify these findings (comparable to direct imaging review) and can likely be used for cohort identification.
    MeSH term(s) Aged ; Brain Infarction/diagnostic imaging ; Cohort Studies ; Female ; Humans ; Image Interpretation, Computer-Assisted/methods ; Leukoencephalopathies/diagnostic imaging ; Magnetic Resonance Imaging/methods ; Male ; Middle Aged ; Natural Language Processing ; Neuroimaging/methods ; Reproducibility of Results
    Language English
    Publishing date 2021-05-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 2041347-6
    ISSN 1471-2377 ; 1471-2377
    ISSN (online) 1471-2377
    ISSN 1471-2377
    DOI 10.1186/s12883-021-02221-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Signal intensity of perirolandic cortex identifies the central sulcus on double inversion recovery MRI.

    Mark, Ian T / Luetmer, Patrick H / Rydberg, Charlotte H / Witte, Robert J / Geske, Jennifer R / Johnson, Matthew P / Lehman, Vance T

    Journal of neurosurgical sciences

    2019  Volume 66, Issue 1, Page(s) 1–8

    Abstract: Background: Identification of the central sulcus can require inspection of subtle differences or require certain pulse sequences. This study identifies the central sulcus by signal intensity on double inversion recovery (DIR) images in multiple anatomic ...

    Abstract Background: Identification of the central sulcus can require inspection of subtle differences or require certain pulse sequences. This study identifies the central sulcus by signal intensity on double inversion recovery (DIR) images in multiple anatomic locations and imaging planes.
    Methods: Forty-nine patients (98 hemispheres) were retrospectively reviewed by three neuroradiologists and one radiology resident. The central sulcus was compared to the surrounding sulci for differences in signal intensity at axial hand knob, axial operculum, and lateral convexity sagittal images (294 locations) on DIR images. The use of the "disappearing central sulcus sign" where the window level is increased at constant width and black/white inversion were also assessed.
    Results: In 49 patients (22 females, 27 males; median age 36 years), the central sulcus cortex signal intensity was lower than adjacent sulci with a frequency of 90/98 (91.8%) at the axial hand knob level, 68/98 (69.4%) at the axial operculum level, and 76/98 (77.5%) at the sagittal level. With black and white inversion, the frequencies were of 96/98 (98%), 92/98 (94%), and 87/98 (89%). The central sulcus was the first to disappear at all three levels with high degrees of inter-reader agreement (86-99%). Traditional anatomic landmarks were absent or conflicting in seven hemispheres (5 patients). The central sulcus was identified by DIR signal intensity in all seven hemispheres.
    Conclusions: The central sulcus can be identified by differences in signal intensity of the perirolandic cortex on DIR. Use of black/white inversion and the disappearing central sulcus sign may further facilitate identification.
    MeSH term(s) Adult ; Anatomic Landmarks ; Brain ; Cerebral Cortex/diagnostic imaging ; Female ; Humans ; Magnetic Resonance Imaging/methods ; Male ; Retrospective Studies
    Language English
    Publishing date 2019-04-02
    Publishing country Italy
    Document type Journal Article
    ZDB-ID 193139-8
    ISSN 1827-1855 ; 0390-5616 ; 0026-4881
    ISSN (online) 1827-1855
    ISSN 0390-5616 ; 0026-4881
    DOI 10.23736/S0390-5616.19.04634-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Association between carotid artery tortuosity and carotid dissection: a case-control study.

    Kim, Sarasa T / Brinjikji, Waleed / Lehman, Vance T / Carr, Carrie M / Luetmer, Patrick H / Rydberg, Charlotte H

    Journal of neurosurgical sciences

    2016  Volume 62, Issue 4, Page(s) 413–417

    Abstract: Background: Carotid artery dissections have long been associated with compromise of the structural integrity of the arterial wall from heritable connective-tissue disorders, hypertension, and trauma. However, an association between spontaneous internal ... ...

    Abstract Background: Carotid artery dissections have long been associated with compromise of the structural integrity of the arterial wall from heritable connective-tissue disorders, hypertension, and trauma. However, an association between spontaneous internal carotid artery dissection and tortuous or redundant carotid anatomy has not been fully explored.
    Methods: Patients with CTA confirmed spontaneous cervical internal carotid artery dissections were compared to a group of age and sex matched controls who also received CTA of the neck. Patients with trauma or aortic dissections were excluded. Five radiologists reviewed the CTA images to evaluate internal carotid artery tortuosity (reported as loops, kinks or coils), retrojugular and retropharyngeal courses of the internal carotid artery, presence of fibromuscular dysplasia and presence of atherosclerotic disease. Baseline data collected included demographic characteristics (sex, age, smoking history) and cardiovascular comorbidities.
    Results: A total of 83 cervical internal carotid artery dissection and their age and sex matched controls were included in this study. 46% of patients were female in each group and mean age was 49.2±10.6 years. The presence of any carotid tortuosity was 53% (N.=44) and 34% (N.=28) in the per-patient analysis of dissection and control groups, respectively (P=0.02). Loops were reported in 22% (N.=18) of dissection patients and 8% (N.=7) of controls (P=0.03). Retrojugular course of the internal carotid artery were seen in 23% (N.=38) of dissection patients and 9% (N.=15) of controls (P=0.0009) in the per-vessel analysis.
    Conclusions: Our study suggests that there is an association between the presence of tortuous carotid artery anatomy and spontaneous carotid artery dissection. This finding emphasizes the importance of the presence of tortuous arteries on CTA imaging to increase the index of suspicion for a potential dissection.
    MeSH term(s) Adult ; Arteries/abnormalities ; Carotid Artery, Internal/abnormalities ; Carotid Artery, Internal, Dissection/epidemiology ; Carotid Artery, Internal, Dissection/etiology ; Case-Control Studies ; Computed Tomography Angiography ; Female ; Humans ; Incidence ; Joint Instability/complications ; Joint Instability/epidemiology ; Male ; Middle Aged ; Retrospective Studies ; Skin Diseases, Genetic/complications ; Skin Diseases, Genetic/epidemiology ; Vascular Malformations/complications ; Vascular Malformations/epidemiology
    Language English
    Publishing date 2016-11-17
    Publishing country Italy
    Document type Journal Article
    ZDB-ID 193139-8
    ISSN 1827-1855 ; 0390-5616 ; 0026-4881
    ISSN (online) 1827-1855
    ISSN 0390-5616 ; 0026-4881
    DOI 10.23736/S0390-5616.16.03790-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Emergent, After Hours Magnetic Resonance Imaging of the Spine.

    Black, David F / Wood, Christopher P / Wells, Michael L / Erickson, Bradley J / Diehn, Felix E / Kaufmann, Timothy J / Rydberg, Charlotte H / Gilbertson, Julie R / Hunt, Christopher H

    Journal of neuroimaging : official journal of the American Society of Neuroimaging

    2015  Volume 25, Issue 4, Page(s) 590–594

    Abstract: Background and purpose: Requests for after-hours emergent spine MR imaging seem to be increasing. We sought to review the trend in after hours spine MRI utilization at our institution and to determine how these results impacted therapeutic intervention.! ...

    Abstract Background and purpose: Requests for after-hours emergent spine MR imaging seem to be increasing. We sought to review the trend in after hours spine MRI utilization at our institution and to determine how these results impacted therapeutic intervention.
    Methods: Following Institutional Review Board approval, reports from 179 after hours spinal MRI's performed over the past 13 years were obtained and the relevant electronic medical records were reviewed.
    Results: Emergent after hours spine MRI utilization increased from 7 per year to 23 over 13 years. Fifty-eight percent (104/179) had significant findings. Twenty-nine percent (52/179) of all patients imaged underwent surgery to treat pathologies identified on MR. Surgery was performed in only 2% (4/179) of these patients within 3 hours and 6% (10/179) within 6 hours of MRI completion. Five percent (8/179) had findings that were treated with radiation therapy and in 78% of these it was performed within 6-12 hours. Of those in whom steroids or antibiotics were initiated, 41% and 50% were treated within 3 hours of MR scanning, respectively.
    Discussion: Clinical use of emergent after hours spine MRI is steadily increasing at our institution. While MR imaging often discerned significant pathologies, performing these emergent studies rarely resulted in immediate surgical or radiotherapeutic intervention.
    MeSH term(s) Adult ; After-Hours Care/utilization ; Aged ; Aged, 80 and over ; Comorbidity ; Emergency Medical Services/methods ; Emergency Medical Services/utilization ; Female ; Humans ; Magnetic Resonance Imaging/utilization ; Male ; Middle Aged ; Minnesota/epidemiology ; Practice Patterns, Physicians'/statistics & numerical data ; Prevalence ; Risk Factors ; Spinal Diseases/epidemiology ; Spinal Diseases/pathology ; Spinal Diseases/therapy ; Utilization Review ; Young Adult
    Language English
    Publishing date 2015-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1071724-9
    ISSN 1552-6569 ; 1051-2284
    ISSN (online) 1552-6569
    ISSN 1051-2284
    DOI 10.1111/jon.12156
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  10. Article: Posterior reversible encephalopathy syndrome during pregnancy: seizures in a previously healthy parturient.

    Long, Timothy R / Hein, Barry D / Brown, Michael J / Rydberg, Charlotte H / Wass, C Thomas

    Journal of clinical anesthesia

    2007  Volume 19, Issue 2, Page(s) 145–148

    Abstract: Posterior reversible encephalopathy syndrome refers to a neuroradiologic disorder in which seizure activity (multiple seizures are more common than single events) is commonly the initial presenting symptom. We describe a case of posterior reversible ... ...

    Abstract Posterior reversible encephalopathy syndrome refers to a neuroradiologic disorder in which seizure activity (multiple seizures are more common than single events) is commonly the initial presenting symptom. We describe a case of posterior reversible encephalopathy syndrome in a previously healthy parturient who presented to the labor and delivery suite with generalized tonic-clonic seizures. Prompt recognition and treatment of this potentially catastrophic disease may avert injury to the patient and neonate.
    MeSH term(s) Adolescent ; Anesthetics, Intravenous/administration & dosage ; Anticonvulsants/administration & dosage ; Brain/diagnostic imaging ; Brain/pathology ; Cesarean Section ; Epilepsy, Tonic-Clonic/complications ; Epilepsy, Tonic-Clonic/drug therapy ; Factor V ; Female ; Humans ; Hypertension/complications ; Intubation, Intratracheal/methods ; Magnesium Sulfate/administration & dosage ; Magnetic Resonance Imaging/methods ; Neuromuscular Depolarizing Agents/administration & dosage ; Pregnancy ; Pregnancy Complications/drug therapy ; Pregnancy Trimester, Third ; Succinylcholine/administration & dosage ; Syndrome ; Tachycardia/complications ; Thiopental/administration & dosage ; Tomography, X-Ray Computed/methods
    Chemical Substances Anesthetics, Intravenous ; Anticonvulsants ; Neuromuscular Depolarizing Agents ; factor V Leiden ; Magnesium Sulfate (7487-88-9) ; Factor V (9001-24-5) ; Succinylcholine (J2R869A8YF) ; Thiopental (JI8Z5M7NA3)
    Language English
    Publishing date 2007-03
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 1011618-7
    ISSN 1873-4529 ; 0952-8180
    ISSN (online) 1873-4529
    ISSN 0952-8180
    DOI 10.1016/j.jclinane.2006.07.004
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