Clinical Neuroradiology最新文献

{"title":"Compressed SENSE in Pediatric Brain Tumor MR Imaging : Assessment of Image Quality, Examination Time and Energy Release.","authors":"Rieke L Meister,&nbsp;Michael Groth,&nbsp;Julian H W Jürgens,&nbsp;Shuo Zhang,&nbsp;Jan H Buhk,&nbsp;Jochen Herrmann","doi":"10.1007/s00062-021-01112-3","DOIUrl":"https://doi.org/10.1007/s00062-021-01112-3","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the image quality, examination time, and total energy release of a standardized pediatric brain tumor magnetic resonance imaging (MRI) protocol performed with and without compressed sensitivity encoding (C-SENSE). Recently introduced as an acceleration technique in MRI, we hypothesized that C‑SENSE would improve image quality, reduce the examination time and radiofrequency-induced energy release compared with conventional examination in a pediatric brain tumor protocol.</p><p><strong>Methods: </strong>This retrospective study included 22 patients aged 2.33-18.83 years with different brain tumor types who had previously undergone conventional MRI examination and underwent follow-up C‑SENSE examination. Both examinations were conducted with a 3.0-Tesla device and included pre-contrast and post-contrast T1-weighted turbo-field-echo, T2-weighted turbo-spin-echo, and fluid-attenuated inversion recovery sequences. Image quality was assessed in four anatomical regions of interest (tumor area, cerebral cortex, basal ganglia, and posterior fossa) using a 5-point scale. Reader preference between the standard and C‑SENSE images was evaluated. The total examination duration and energy deposit were compared based on scanner log file analysis.</p><p><strong>Results: </strong>Relative to standard examinations, C‑SENSE examinations were characterized by shorter total examination times (26.1 ± 3.93 vs. 22.18 ± 2.31 min; P = 0.001), reduced total energy deposit (206.0 ± 19.7 vs. 92.3 ± 18.2 J/kg; P < 0.001), and higher image quality (overall P < 0.001).</p><p><strong>Conclusion: </strong>C‑SENSE contributes to the improvement of image quality, reduction of scan times and radiofrequency-induced energy release relative to the standard protocol in pediatric brain tumor MRI.</p>","PeriodicalId":49298,"journal":{"name":"Clinical Neuroradiology","volume":"32 3","pages":"725-733"},"PeriodicalIF":2.8,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9424145/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39793432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The case against endovascular thrombectomy in neonates with arterial ischemic stroke.","authors":"Adam Kirton, Lori C Jordan, Darren B Orbach, Heather J Fullerton","doi":"10.1007/s00062-022-01153-2","DOIUrl":"10.1007/s00062-022-01153-2","url":null,"abstract":"","PeriodicalId":49298,"journal":{"name":"Clinical Neuroradiology","volume":"32 1","pages":"581-582"},"PeriodicalIF":2.4,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47565597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Early TICI 2b or Late TICI 3-Is Perfect the Enemy of Good?","authors":"F Flottmann,&nbsp;N van Horn,&nbsp;M E Maros,&nbsp;R McDonough,&nbsp;M Deb-Chatterji,&nbsp;A Alegiani,&nbsp;G Thomalla,&nbsp;U Hanning,&nbsp;J Fiehler,&nbsp;C Brekenfeld","doi":"10.1007/s00062-021-01048-8","DOIUrl":"https://doi.org/10.1007/s00062-021-01048-8","url":null,"abstract":"<p><strong>Background and purpose: </strong>A Thrombolysis in Cerebral Infarction (TICI) score of 3 has been established as therapeutic goal in endovascular therapy (EVT) for acute ischemic stroke; however, in the case of early TICI2b reperfusion, the question remains whether to stop the procedure or to continue in the pursuit of perfection (i.e., TICI 2c/3).</p><p><strong>Methods: </strong>A total of 6635 patients were screened from the German Stroke Registry. Patients who underwent EVT for occlusion of the middle cerebral artery (M1 segment), with final TICI score of 2b/3 were included. Multivariable logistic regression was performed with functional independence (modified Rankin Scale, mRS at day 90 of 0-2) as the dependent variable.</p><p><strong>Results: </strong>Of 1497 patients, 586 (39.1%) met inclusion criteria with a final TICI score of 2b and 911 (60.9%) with a TICI score of 3. Patients who achieved first-pass TICI3 showed highest odds of functional independence (Odds ratio [OR] 1.71, 95% confidence interval [95% CI] 1.18-2.47). Patients who achieved TICI2b with the second pass (OR 0.53, 95% CI 0.31-0.89) or with three or more passes (OR 0.44, 95% CI 0.27-0.70) had significantly worse clinical outcomes compared to first-pass TICI2b. TICI3 at the second pass was by trend better than first-pass TICI2b (OR 1.55, 95% CI 0.98-2.45), but TICI3 after 3 or more passes (OR 0.93, 95% CI 0.57-1.50) was not significantly different from first-pass TICI2b.</p><p><strong>Conclusion: </strong>First-pass TICI2b was superior to TICI2b after ≥ 2 retrievals and comparable to TICI3 at ≥ 3 retrievals. The potential benefit in outcome after achieving TICI3 following further retrieval attempts after first-pass TICI2b need to be weighed against the risks.</p>","PeriodicalId":49298,"journal":{"name":"Clinical Neuroradiology","volume":"32 2","pages":"353-360"},"PeriodicalIF":2.8,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s00062-021-01048-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39124239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk Factors for Cerebral Aneurysm Rupture in Mongolia.","authors":"Matthias Bechstein,&nbsp;Amarjargal Gansukh,&nbsp;Boldbat Regzengombo,&nbsp;Oyun Byambajav,&nbsp;Lukas Meyer,&nbsp;Michael Schönfeld,&nbsp;Helge Kniep,&nbsp;Uta Hanning,&nbsp;Gabriel Broocks,&nbsp;Tserenchunt Gansukh,&nbsp;Jens Fiehler","doi":"10.1007/s00062-021-01051-z","DOIUrl":"https://doi.org/10.1007/s00062-021-01051-z","url":null,"abstract":"<p><strong>Purpose: </strong>Identification of country-specific demographic, medical, lifestyle, and geoenvironmental risk factors for cerebral aneurysm rupture in the developing Asian country of Mongolia. First-time estimation of the crude national incidence of aneurysmal subarachnoid hemorrhage (aSAH).</p><p><strong>Methods: </strong>A retrospective analysis of all intracranial digital subtraction angiographies (DSA) acquired in Mongolia during the 2‑year period 2016-2017 (1714 examinations) was performed. During this period, DSA was used as primary diagnostic imaging modality for acute severe neurological symptoms in the sole hospital nationwide dedicated to neurological patients. The catchment area of the hospital included the whole country. Patients with incidental and ruptured aneurysms were reviewed with respect to their medical history and living conditions. The data was used to install a Mongolian aneurysm registry.</p><p><strong>Results: </strong>The estimated annual crude incidence of cerebral aneurysm rupture was 6.71 for the country of Mongolia and 14.53 per 100,000 persons for the capital region of Ulaanbaatar. Risk factors common in developed countries also applied for the Mongolian population: A medical history of hypertension, smoking or the presence of multiple aneurysms led to a higher relative risk of rupture. In contrast, female gender was not associated with a higher risk in this national cohort. Males pursuing a traditional nomadic living may exhibit a specifically high risk of rupture.</p><p><strong>Conclusion: </strong>Disease management of over 200 individuals/year with aSAH constitutes a socioeconomic burden in Mongolia. Efforts to raise awareness of the risk factors hypertension and smoking among the Mongolian population are desirable. Measures to improve the nationwide availability of modern neurovascular treatment options are currently under consideration.</p>","PeriodicalId":49298,"journal":{"name":"Clinical Neuroradiology","volume":"32 2","pages":"499-506"},"PeriodicalIF":2.8,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s00062-021-01051-z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39124240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"neuroRAD 2022: Precision. Individualized","authors":"P. Schramm, C. Zimmer","doi":"10.1007/s00062-022-01163-0","DOIUrl":"https://doi.org/10.1007/s00062-022-01163-0","url":null,"abstract":"","PeriodicalId":49298,"journal":{"name":"Clinical Neuroradiology","volume":"32 1","pages":"323 - 324"},"PeriodicalIF":2.8,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48975986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Renal Pelvis Opacification on Postmyelography Computed Tomography as an Indicator for Cerebrospinal Fluid Loss in Spontaneous Intracranial Hypotension.","authors":"Eike I Piechowiak,&nbsp;Laura Bär,&nbsp;Levin Häni,&nbsp;Mattia Branca,&nbsp;Johannes Kaesmacher,&nbsp;Pasquale Mordasini,&nbsp;Andreas Raabe,&nbsp;Christian T Ulrich,&nbsp;Jan Gralla,&nbsp;Jürgen Beck,&nbsp;Tomas Dobrocky","doi":"10.1007/s00062-021-01042-0","DOIUrl":"https://doi.org/10.1007/s00062-021-01042-0","url":null,"abstract":"<p><strong>Purpose: </strong>To assess early renal pelvis opacification on postmyelography computed tomography (CT) as a marker for cerebrospinal fluid (CSF) loss in patients with spontaneous intracranial hypotension (SIH).</p><p><strong>Methods: </strong>The SIH patients referred to our hospital between January 2012 and May 2018 were retrospectively reviewed and divided into 2 groups based on the presence of spinal longitudinal extrathecal CSF collection (SLEC): (1) SLEC(+) with, and (2) SLEC(-) without proof of SLEC on multimodal imaging. Non-SIH patients (n = 20) undergoing CT myelography served as controls. The renal pelvis density on postmyelography CT was measured in all patients. Mean difference in renal pelvis density between the groups was calculated.</p><p><strong>Results: </strong>In total, 111 SIH patients (mean age 48 ± 13 years; 60% female) were included, 71 (64%) SLEC(+) and 40 (36%) SLEC(-). The adjusted renal pelvis density in the SLEC(+), SLEC(-), and the non-SIH group was 108 Hounsfield unit (HU), 83 HU, and 32 HU, respectively, resulting in a significant difference between SLEC(+) vs. control group 1 (75 HU, p < 0.001), SLEC(-) vs. control group 1 (50 HU, p < 0.001), and a tendency for higher density in SLEC(+) than SLEC(-) (25 HU, p = 0.16).</p><p><strong>Conclusion: </strong>Increased renal pelvis opacification on postmyelography CT was observed in SIH patients, even in the absence of a CSF leak or a CSF venous fistula, when compared to non-SIH patients. Although the provenance of early renal opacification in SLEC (-) SIH patients remains unclear, our results suggest that it may be a surrogate for increased spinal CSF resorption via spinal arachnoid granulations and along spinal nerve sheaths occult to direct imaging.</p>","PeriodicalId":49298,"journal":{"name":"Clinical Neuroradiology","volume":"32 2","pages":"529-536"},"PeriodicalIF":2.8,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s00062-021-01042-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39038597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diagnostic Performance of MRA for UnrupturedAneurysms at the Distal ICA.","authors":"Guangchen He,&nbsp;Jienan Wang,&nbsp;Yiran Zhang,&nbsp;Minghua Li,&nbsp;Haitao Lu,&nbsp;Yingsheng Cheng,&nbsp;Yueqi Zhu","doi":"10.1007/s00062-021-01076-4","DOIUrl":"https://doi.org/10.1007/s00062-021-01076-4","url":null,"abstract":"<p><strong>Purpose: </strong>Unruptured intracranial aneurysms (UIAs) at the distal internal carotid artery (ICA) (segments C5-C7) are difficult to accurately display on computed tomography angiography (CTA) due to the influences of bone structures and vessel curvature. We investigated the utility of three-dimensional time-of-flight magnetic resonance angiography (3D-TOF-MRA) at 3.0‑T for the detection of morphologic features compared to digital subtraction angiography (DSA).</p><p><strong>Methods: </strong>This retrospective study included 2398 patients between January 2015 and May 2020 who underwent 3D-TOF-MRA and DSA within 3 months. Morphologic features including aneurysm size, neck width, shape and relation to adjacent arteries and other diagnostic parameters were recorded. Three observers blinded to the clinical and DSA results independently analyzed MRA data sets. The statistical difference of each aneurysm-specific variable was performed using χ²-tests and multivariate logistic regression analysis.</p><p><strong>Results: </strong>A total of 551 aneurysms in 514 patients were confirmed at the distal ICA by DSA. Patient-based, aneurysm-based and location-based evaluations with 3D-TOF-MRA yielded high diagnostic accuracy in the detection of target UIAs. The accuracy of displayed morphologic features was 94.9% for size, 97.2% for neck width, 92.6% for shape, and 96.4% for relationship to adjacent vessels. Multivariate logistic regression showed that tiny (P < 0.001) or giant (P = 0.039) size and a lobulated shape (P = 0.006) significantly affected the morphologic assessment on 3D-TOF-MRA.</p><p><strong>Conclusion: </strong>Three-dimensional TOF-MRA can accurately depict and display morphologic features of distal ICA UIAs. Tiny or giant-sized distal ICA aneurysms and with lobulation tend to carry a great risk of misdiagnosis in morphologic assessments.</p>","PeriodicalId":49298,"journal":{"name":"Clinical Neuroradiology","volume":"32 2","pages":"507-515"},"PeriodicalIF":2.8,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39944661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The \"Shiny and Thick High Heel Sign\" : A novel radiologic sign for detecting intracranial dural arteriovenous fistulas with time-of-flight magnetic resonance angiography.","authors":"Hannes Schacht,&nbsp;Inke Regina König,&nbsp;Johannes Hensler,&nbsp;Peter Schramm,&nbsp;Jan Küchler,&nbsp;Claudia Ditz,&nbsp;Alexander Neumann","doi":"10.1007/s00062-021-01036-y","DOIUrl":"https://doi.org/10.1007/s00062-021-01036-y","url":null,"abstract":"<p><strong>Purpose: </strong>Together with the foramen ovale, the middle meningeal artery (MMA) looks like a high heel shoe print on axial time-of-flight magnetic resonance angiography (TOF-MRA) images, with the MMA resembling the heel. Cranial dural arteriovenous fistulas (DAVF) are often fed by the MMA, which can lead to an increase of signal intensity and diameter of this vessel, resulting in a more \"shiny\" and \"thick\" high heel print appearance than on the contralateral side. We describe this finding as a novel radiologic sign and provide cut-off values for the ratios of MMA signal intensities and diameters for predicting the presence of a DAVF.</p><p><strong>Methods: </strong>A total of 84 TOF-MRA examinations of 44 patients with DAVFs (40 with unilateral MMA feeders, 4 with bilateral feeders) and of 40 patients without DAVFs were included. Diameters and signal intensities of both MMAs were measured by two raters and evaluated using receiver operating characteristic analysis.</p><p><strong>Results: </strong>The diameters of feeding and non-feeding MMAs differed significantly, as did the ratios of signal intensities and of diameters of DAVF and control patients (P < 0.0001). Cut-off values were 1.25 for average signal intensity ratio (shiny high heel sign) and 1.21 for diameter ratio (thick high heel sign). The combination of the \"shiny\" and the \"thick\" high heel sign resulted in the highest sensitivity (92.5%) and positive predictive value (95%).</p><p><strong>Conclusion: </strong>The described sign seems promising for the detection of DAVFs with noncontrast-enhanced MRI. The TOF-MRA source images should be reviewed with special attention to the MMA.</p>","PeriodicalId":49298,"journal":{"name":"Clinical Neuroradiology","volume":"32 2","pages":"465-470"},"PeriodicalIF":2.8,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s00062-021-01036-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39008159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical outcomes of adjunct sinus stenting in dural arteriovenous fistulas : Role of flow restoration in steno-occlusion and cortical venous reflux.","authors":"Yen-Heng Lin,&nbsp;Chung-Wei Lee,&nbsp;Hon-Man Liu","doi":"10.1007/s00062-021-01031-3","DOIUrl":"https://doi.org/10.1007/s00062-021-01031-3","url":null,"abstract":"<p><strong>Purpose: </strong>This study investigated the clinical outcomes and follow-up results of venous sinus stenting (VSS) for constrictive dural sinus restoration in patients with intracranial dural arteriovenous fistulas (DAVFs). We hypothesized that this treatment would have durable benefits in such patients.</p><p><strong>Methods: </strong>Patients who underwent VSS for DAVFs with cortical venous reflux between January 2008 and June 2020 were identified after a retrospective review (n =18). Clinical and endovascular treatment data and follow-up information were reviewed.</p><p><strong>Results: </strong>The mean age of the 18 patients was 59.9 years. Stents were implanted in 10 previously occluded sinuses and 9 stenotic sinuses in addition to endovascular embolization. One patient received bilateral VSS. Subdural hemorrhage occurred in one patient after recanalization for embolization, followed by uneventful stenting. In 17 patients with clinical follow-up, the median follow-up time was 59.5 months (interquartile range 18 to 84 months). Of these, sixteen patients had follow-up vascular imaging, revealing AVF obliteration in 6 patients (38%) and stent patency in 11 (69%). Retreatment was performed for 8 (50%) patients. The mean follow-up modified Rankin scale score was 1.28. All patients had longstanding symptomatic improvement.</p><p><strong>Conclusion: </strong>Restoration of sinus flow in DAVFs with cortical venous reflux through VSS has an acceptable complication rate and long-term symptomatic control; however, retreatment is often required, and stent occlusion is not uncommon.</p>","PeriodicalId":49298,"journal":{"name":"Clinical Neuroradiology","volume":"32 2","pages":"455-464"},"PeriodicalIF":2.8,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s00062-021-01031-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39036832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Societies‘ Communications","authors":"","doi":"10.1007/s00062-022-01169-8","DOIUrl":"https://doi.org/10.1007/s00062-022-01169-8","url":null,"abstract":"","PeriodicalId":49298,"journal":{"name":"Clinical Neuroradiology","volume":"32 1","pages":"595-599"},"PeriodicalIF":2.8,"publicationDate":"2022-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42698987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}