GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Neuroform Stent Applications in Ruptured Intracranial Aneurysms with Small Parent Vessels
    SAGE Publications ; 2007
    In:  The Neuroradiology Journal Vol. 20, No. 6 ( 2007-12), p. 704-710
    Details
    In: The Neuroradiology Journal, SAGE Publications, Vol. 20, No. 6 ( 2007-12), p. 704-710
    Abstract: The Neuroform stent is a device specifically designed for use in cerebral vessels and is increasingly being used in the embolization of broad-necked aneurysms, but long-term results are unsatisfactory. Reconstructive treatments using stents improve the occlusion rate and protect parent vessels. Stent-assisted coiling of broad-necked cerebral aneurysms is a technique that has rendered most aneurysms amenable to coiling. Recently, the use of stent-assisted coiling with preservation of the parent vessel lumen has been described in some series. Several studies have shown that with the advances in device technology intracranial stenting is feasible even in the distal part of the ICA. But, endovascular treatment of these aneurysms (small parent vessel less than 2.0 mm) in Neuroform stent-assisted coiling has no clinical applications. These lesions have seemed more difficult to treat than other aneurysms because of subsequent thrombus formation and vessel trauma after stent deployment and navigation. The purpose of this study was to review the safety and durability of our aneurysms treated with stent-assisted coiling of ruptured aneurysms with small parent vessesl.
    Type of Medium: Online Resource
    ISSN: 1971-4009 , 2385-1996
    URL: Article
    DOI: 10.1177/197140090702000615
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2007
    detail.hit.zdb_id: 2622347-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Trend Analysis of the Profiles of 12 Sexually Transmitted Disease Pathogens in the Republic of Korea in 2019
    SAGE Publications ; 2021
    In:  INQUIRY: The Journal of Health Care Organization, Provision, and Financing Vol. 58 ( 2021-01), p. 004695802110656-
    Details
    In: INQUIRY: The Journal of Health Care Organization, Provision, and Financing, SAGE Publications, Vol. 58 ( 2021-01), p. 004695802110656-
    Abstract: Background: Sexually transmitted diseases (STDs) are common infectious diseases in humans transmitted through unprotected sexual activities. In South Korea, despite the high annual incidence of STDs, detailed examinations of pathogen-specific factors and causes for delays in diagnosis and treatment are still lacking. Furthermore, STD prevalence patterns and important pathogen-specific factors remain unclear. Herein, we retrospectively analyzed the epidemiology of STDs in South Korea in 2019 by analyzing the association of pathogen-specific infection patterns with factors such as sex, age, region, and month. Methods: We obtained the STD test results of 172,973 individuals from the Seoul Clinic Laboratory in 2019, most of whom had multiple infections; hence, 275,296 STD-positive cases were included in this analysis. Through deoxyribonucleic acid (DNA) amplification, they were categorized by pathogen type. Subsequently, they were further classified by month, region, and age while concurrently being stratified according to sex. Results: Among the 12 pathogens detected in this study, Gardnerella vaginalis had the highest prevalence, with 92,490 cases in both sex groups; moreover, many of them were concurrently infected by two or more pathogens. The prevalence of STDs did not differ according to month or region. Conversely, the pathogen-specific prevalence rates significantly differed according to age. Older adults had higher prevalence rates of Chlamydia trachomatis, Trichomonas vaginalis, Candida albicans, and herpes simplex virus type 1 infections than younger adults. Conclusion: These pathogen-specific prevalence patterns provide information that helps to understand population vulnerability according to region and age and helps develop STD prevention and treatment strategies in South Korea.
    Type of Medium: Online Resource
    ISSN: 0046-9580 , 1945-7243
    URL: Article
    DOI: 10.1177/00469580211065684
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2147137-X
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Usefulness of pointwise encoding time reduction with radial acquisition sequence in subtraction-based magnetic resonance angiography for follow-up of the Neuroform Atlas stent-assisted coil embolization for cerebral aneurysms
    SAGE Publications ; 2021
    In:  Acta Radiologica Vol. 62, No. 9 ( 2021-09), p. 1193-1199
    Details
    In: Acta Radiologica, SAGE Publications, Vol. 62, No. 9 ( 2021-09), p. 1193-1199
    Abstract: Although time-of-flight magnetic resonance angiography (TOF-MRA) is widely used, it has limited usefulness for follow-up after stent-assisted coil embolization. Contrast-enhanced MRA (CE-MRA) and ultrashort echo time MRA have been suggested as alternative methods for visualization after this procedure. Purpose To compare efficacy and usefulness of pointwise encoding time reduction with radial acquisition (PETRA) sequence in subtraction-based MRA (qMRA), TOF-MRA, and CE-MRA during the follow-up after Neuroform Atlas stent-assisted coil embolization for intracranial aneurysms. Material and Methods This retrospective study included 23 patients with 24 aneurysms who underwent Neuroform Atlas stent-assisted coil embolization for intracranial aneurysms. All patients were evaluated with PETRA qMRA, TOF-MRA, and CE-MRA at the same follow-up session. The flow within stents, occlusion status, and presence of pseudo-stenosis were evaluated; inter-observer and intermodality agreements for the three methods were also graded. Results The mean score for flow visualization within the stents was significantly higher for PETRA qMRA and CE-MRA than for TOF-MRA (although no significant difference was found between PETRA qMRA and CE-MRA). Good inter-observer agreement was observed for each modality. PETRA qMRA and CE-MRA were more consistent with digital subtraction angiography (DSA) than TOF-MRA for aneurysm occlusion status. The intermodality agreement was better between PETRA qMRA and DSA, and between CE-MRA and DSA, than between DSA and TOF-MRA. Pseudo-stenosis was most frequently observed in TOF-MRA, followed by CE-MRA and PETRA qMRA. Conclusion PETRA qMRA is useful for evaluating the parent artery patency and occlusion status of aneurysms after Neuroform Atlas stent-assisted coil embolization.
    Type of Medium: Online Resource
    ISSN: 0284-1851 , 1600-0455
    URL: Article
    DOI: 10.1177/0284185120952784
    RVK:
    XA 10000
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2024579-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Experience of Y-Configured Stents for Small Basilar Tip Aneurysms
    SAGE Publications ; 2007
    In:  Interventional Neuroradiology Vol. 13, No. 1 ( 2007-03), p. 45-50
    Details
    In: Interventional Neuroradiology, SAGE Publications, Vol. 13, No. 1 ( 2007-03), p. 45-50
    Abstract: Among posterior circulation aneurysms, basilar tip aneurysm is the most difficult to treat. Because of their deep location in front of the brainstem and their intimate relationship to perforating vessels, morbidity and mortality rates associated with direct exposure used to be daunting. Complex intracranial aneurysms are not uncommonly encountered in cerebrovascular practice. Often their complexity can render standard treatment either impossible or exceedingly hazardous. Although endovascular therapy is an available alternative to surgical clipping, it is not without risks. The Neuroform stent represents a significant advance in the endovascular treatment of intracranial aneurysms. The Y-configured reconstruction method of the Neuroform stent may represent a variable therapeutic option especially in the case of terminal type including bifurcation aneurysms. We report the results of our experience in two small basilar tip aneurysms using stent-assisted coiling.
    Type of Medium: Online Resource
    ISSN: 1591-0199 , 2385-2011
    URL: Article
    DOI: 10.1177/159101990701300105
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2007
    detail.hit.zdb_id: 2571161-1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Usefulness of Pointwise Encoding Time Reduction with Radial Acquisition-Magnetic Resonance Angiography after Endovascular Treatment for Intracranial Aneurysms
    SAGE Publications ; 2023
    In:  Interventional Neuroradiology Vol. 29, No. 1 ( 2023-02), p. 20-29
    Details
    In: Interventional Neuroradiology, SAGE Publications, Vol. 29, No. 1 ( 2023-02), p. 20-29
    Abstract: Imaging follow-up after endovascular treatment is important; however, time-of-flight magnetic resonance angiography (TOF-MRA) has limitations associated with magnetic susceptibility and radiofrequency shielding caused by the stent and coils. We evaluated the diagnostic performance of pointwise encoding time reduction with radial acquisition (PETRA)-MRA after endovascular treatment for intracranial aneurysms. Material and methods A total of 186 patients with 211 aneurysms who underwent both pointwise encoding time reduction with radial acquisition- and time-of-flight magnetic resonance angiography in the same imaging session for follow-up after endovascular treatment. We subjectively graded the overall image quality, visualization of treated sites, and occlusion status. Results Although the overall image quality scores of pointwise encoding time reduction with radial acquisition-magnetic resonance angiography were significantly lower than those of time-of-flight magnetic resonance angiography for both observers (4.04 ± 0.81 vs. 4.85 ± 0.35 [observer 1], 4.60 ± 0.69 vs. 4.94 ± 0.24 [observer 2] ) (both P  〈  .001), the visibility of treated sites using pointwise encoding time reduction with radial acquisition-magnetic resonance angiography was significantly better than that of time-of-flight magnetic resonance angiography overall (4.27 ± 0.97 vs. 3.42 ± 1.01; P  〈  .001), in the distal internal carotid artery (4.46 ± 0.79 vs. 3.40 ± 1.00; P  〈  .001), and in the middle cerebral artery (4.19 ± 0.93 vs. 3.08 ± 0.53, P = 0.007). Pointwise encoding time reduction with radial acquisition-magnetic resonance angiography showed a higher area under the curve than time-of-flight magnetic resonance angiography for the evaluation of treated aneurysm occlusion, except for posterior circulation aneurysms. Conclusions Pointwise encoding time reduction with radial acquisition-magnetic resonance angiography showed better visualization of treated sites and better diagnostic performance than time-of-flight magnetic resonance angiography for anterior circulation aneurysms. However, Pointwise encoding time reduction with radial acquisition-magnetic resonance angiography showed limitations in the follow-up evaluation of posterior circulation aneurysms.
    Type of Medium: Online Resource
    ISSN: 1591-0199 , 2385-2011
    URL: Article
    DOI: 10.1177/15910199211065906
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2571161-1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Spontaneous intracranial vertebral artery dissection with acute ischemic stroke: High-resolution magnetic resonance imaging findings
    SAGE Publications ; 2018
    In:  The Neuroradiology Journal Vol. 31, No. 3 ( 2018-06), p. 262-269
    Details
    In: The Neuroradiology Journal, SAGE Publications, Vol. 31, No. 3 ( 2018-06), p. 262-269
    Abstract: Acute ischemic stroke (AIS) more frequently develops in patients with intracranial vertebral artery dissection (VAD) than extracranial VAD, and is associated with possible poor clinical outcomes. The aim of this study is to compare high-resolution magnetic resonance imaging (HR-MRI) findings and clinical features of VAD with and without AIS. Methods Twenty-nine lesions from 27 patients (15 male and 12 female patients; age range = 28–73 years) who underwent diffusion MRI and 3T HR-MRI within seven days were included. We classified VAD according to the presence of AIS lesions on diffusion MRI. Clinical features and HR-MRI findings (angiographic patterns, presence of double lumen sign, dissecting flap, posterior inferior cerebellar artery involvement, remodeling index, length of affected vessels, T1-signal intensity, area of intramural hematoma, and grades and patterns of vessel wall enhancement) were evaluated. Results Thirteen VADs with AIS and 16 without AIS were included. There were no significant differences in the clinical parameters (sex, age, risk factors, symptoms). More VADs with AIS presented as a steno-occlusive pattern than VADs without AIS. More VADs without AIS presented with aneurysmal dilation, larger mean remodeling index and longer mean length than VADs with AIS. Presence of intramural hematoma, T1-iso-signal intensity of intramural hematoma and contrast enhancement were significantly more common in VADs with AIS than without AIS. Conclusions Our study showed some differences in HR-MRI comparing intracranial VAD patients with and without AIS. Differing findings may facilitate a better understanding of intracranial VAD and risk assessment of AIS in these patients.
    Type of Medium: Online Resource
    ISSN: 1971-4009 , 2385-1996
    URL: Article
    DOI: 10.1177/1971400918764129
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 2622347-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Compressed sensing time-of-flight magnetic resonance angiography with high spatial resolution for evaluating intracranial aneurysms: comparison with digital subtraction angiography
    SAGE Publications ; 2021
    In:  The Neuroradiology Journal Vol. 34, No. 3 ( 2021-06), p. 213-221
    Details
    In: The Neuroradiology Journal, SAGE Publications, Vol. 34, No. 3 ( 2021-06), p. 213-221
    Abstract: Compressed sensing is used for accelerated acquisitions with incoherently under-sampled k-space data, and intracranial time-of-flight magnetic resonance angiography is suitable for compressed sensing. Compressed sensing time-of-flight is beneficial in decreasing acquisition time and increasing spatial resolution while maintaining acquisition time. In this retrospective study, we aimed to evaluate the image quality and diagnostic performance of compressed sensing time-of-flight with high spatial resolution and compare with parallel imaging time-of-flight using digital subtraction angiography as a reference. Material and methods In total, 39 patients with 46 intracranial aneurysms underwent parallel imaging and compressed sensing time-of-flight in the same imaging session and digital subtraction angiography before or after magnetic resonance angiography. The overall image quality, artefacts and diagnostic confidence were assessed by two observers. The contrast ratio, maximal aneurysm diameters and diagnostic performance were evaluated. Results Compressed sensing time-of-flight showed significantly better overall image quality, degree of artefacts and diagnostic confidence in both observers, with better inter-observer agreement. The contrast ratio was significantly higher for compressed sensing time-of-flight than for parallel imaging time-of-flight in both observers (source images, P  〈  0.001; maximum intensity projection images, P  〈  0.05 for both observers); however, the measured maximal diameters of aneurysms were not significantly different. Compressed sensing time-of-flight showed higher sensitivity, specificity, accuracy and positive and negative predictive values for detecting aneurysms than parallel imaging time-of-flight in both observers, with better inter-observer agreement. Compressed sensing time-of-flight was preferred over parallel imaging time-of-flight by both observers; however, parallel imaging time-of-flight was preferred in cases of giant and large aneurysms. Conclusions Compressed sensing-time-of-flight provides better image quality and diagnostic performance than parallel imaging time-of-flight. However, neuroradiologists should be aware of under-sampling artefacts caused by compressed sensing.
    Type of Medium: Online Resource
    ISSN: 1971-4009 , 2385-1996
    URL: Article
    DOI: 10.1177/1971400920988099
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2622347-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Effect of the respiratory motion of pulmonary nodules on CT-guided percutaneous transthoracic needle biopsy
    SAGE Publications ; 2023
    In:  Acta Radiologica Vol. 64, No. 7 ( 2023-07), p. 2245-2252
    Details
    In: Acta Radiologica, SAGE Publications, Vol. 64, No. 7 ( 2023-07), p. 2245-2252
    Abstract: Computed tomography (CT)-guided percutaneous transthoracic needle biopsy (PTNB) is highly affected by respiratory motion; however, respiratory motion of target nodule during the PTNB and its effect on CT-guided lung biopsy have not been studied. Purpose To investigate the effect of the respiratory motion of pulmonary nodules on CT-guided PTNB. Material and Methods We retrospectively reviewed the procedural CT scans of 426 pulmonary nodules that underwent PTNB during quiet breathing. Maximal and average respiratory motions were measured using the difference of table position of the targeted nodule between multiple procedural scans. Diagnostic performance, complications, and technical factors of PTNB in nodules with large motion (maximal motion 〉 1 cm) were compared with those in nodules with small motion (≤1 cm). Results The mean maximal and average respiratory motions between tidal volume breathing were 5.4 ± 4.4 and 2.7 ± 2.6 mm, respectively. Sensitivity and accuracy were 93.1% and 96.1% in nodules with large motion, compared with 94.7% and 95.9% in nodules with small motion, respectively. Respiratory targeting ( P  〈  0.001), needle modulation ( P  〈  0.001), motion artifact of target ( P  〈  0.001), target disappearance from scans ( P  〈  0.001), and number of performed CT scans ( P  〈  0.001) were significantly higher in the large motion group, with no significant difference in radiation dose and complications between the groups. Conclusion The respiratory motion of pulmonary nodules during CT-guided PTNB may cause technical difficulties but does not affect diagnostic performance nor complications associated with PTNB.
    Type of Medium: Online Resource
    ISSN: 0284-1851 , 1600-0455
    URL: Article
    DOI: 10.1177/02841851221144616
    RVK:
    XA 10000
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2024579-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Creating a Femoral Tunnel Aperture at the Anteromedial Footprint Versus the Central Footprint in ACL Reconstruction: Comparison of Contact Stress Patterns
    SAGE Publications ; 2021
    In:  Orthopaedic Journal of Sports Medicine Vol. 9, No. 4 ( 2021-04-01), p. 232596712110018-
    Details
    In: Orthopaedic Journal of Sports Medicine, SAGE Publications, Vol. 9, No. 4 ( 2021-04-01), p. 232596712110018-
    Abstract: It remains unclear whether an anteromedial (AM) footprint or a central footprint anterior cruciate ligament (ACL) graft exhibits less contact stress with the femoral tunnel aperture. This contact stress can generate graft attrition forces, which can lead to potential graft failure. Purpose/Hypothesis: The purpose of this study was to compare the difference in contact stress patterns of the graft around a femoral tunnel that is created at the anatomic AM footprint versus the central footprint. It was hypothesized that the difference in femoral tunnel positions would influence the contact stress at the interface between the reconstructed graft and the femoral tunnel orifice. Study Design: Controlled laboratory study. Methods: A total of 24 patients who underwent anatomic single-bundle ACL reconstruction were included in this study. In 12 patients, the femoral tunnels were created at the center of the native AM footprint (AM group), and in the remaining 12 patients the center of the femoral tunnel was placed in the anatomic central footprint (central group). Three-dimensional knee models were created and manipulated using several modeling programs, and the graft-tunnel angle (GTA) was determined using a special software program. The peak contact stresses generated on the virtual ACL graft around the femoral tunnel orifice were calculated using a finite element method. Results: The mean GTA was significantly more obtuse in the AM group than in the central group (124.2° ± 5.9° vs 112.6° ± 7.9°; P = .001). In general, both groups showed high stress distribution on the anterior surface of the graft, which came in contact with the anterior aspect of the femoral tunnel aperture. The degree of stress in the central group (5.3 ± 2.6 MPa) was significantly higher than that in the AM group (1.2 ± 1.1 MPa) ( P 〈 .001). Conclusion: Compared with the AM footprint ACL graft, the central footprint ACL graft developed significantly higher contact stress in the extended position, especially around the anterior aspect of the femoral tunnel orifice. Clinical Relevance: The contact stress of the ACL graft at the extended position of the knee may be minimized by creating the femoral tunnel at the AM-oriented footprint.
    Type of Medium: Online Resource
    ISSN: 2325-9671 , 2325-9671
    URL: Article
    DOI: 10.1177/23259671211001802
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2706251-X
    SSG: 31
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    Collagenous Ultrastructure of the Torn Medial Meniscus Posterior Root: A Transmission Electron Microscopy Study
    SAGE Publications ; 2019
    In:  The American Journal of Sports Medicine Vol. 47, No. 13 ( 2019-11), p. 3221-3228
    Details
    In: The American Journal of Sports Medicine, SAGE Publications, Vol. 47, No. 13 ( 2019-11), p. 3221-3228
    Abstract: The collagen ultrastructure of torn medial meniscus posterior roots (MMPRs) has not been precisely defined. Purpose: To investigate the ultrastructure of torn MMPRs, focusing on their collagen fibers, and to compare the collagen net architecture between intact and torn MMPRs using the Collagen Meniscal Architecture (CMA) scoring system. Study Design: Descriptive laboratory study. Methods: Forty-three human meniscal specimens were obtained from 32 patients with osteoarthritis during total knee arthroplasty between January 2018 and November 2018. There were 23 specimens taken from patients with an MMPR tear and 20 taken from patients without an MMPR tear served as a control group. The presence of an MMPR tear was defined as a complete radial tear within 9 mm of the posterior root attachment. The collagen ultrastructure of the meniscal specimens was assessed with transmission electron microscopy using the CMA scoring system. Patient demographics included sex, age, and body mass index, and radiographic assessments included the Kellgren-Lawrence (K-L) grading system and the mechanical axis angle. Results: The median CMA score was significantly higher in torn MMPRs (5.5 [interquartile range, 3.5-6.0]) than in intact MMPRs (2.0 [interquartile range, 1.5-3.8] ) ( P 〈 .001). When the CMA scores were converted to CMA grading, 23 torn MMPRs had 1 grade I, 9 grade II, and 13 grade III menisci. In 20 intact MMPRs, there were 12 grade I, 7 grade II, and 1 grade III menisci. No significant differences in sex, age, body mass index, K-L grade, or mechanical axis angle were found between groups. Conclusion: This study showed that torn MMPRs had decreased numbers and disorganized courses of collagen fibers. The structural problem of torn MMPRs can negatively affect meniscal healing, function, and long-term survival after root repair. Clinical Relevance: These results might provide a histopathological reason for the low healing rate after MMPR repair.
    Type of Medium: Online Resource
    ISSN: 0363-5465 , 1552-3365
    URL: Article
    DOI: 10.1177/0363546519876110
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2063945-4
    SSG: 31
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...