Stefan Hahnel

Summary

Affiliation: University of Heidelberg
Country: Germany

Publications

  1. ncbi request reprint Magnetisation transfer ratio is low in normal-appearing cerebral white matter in patients with normal pressure hydrocephalus
    S Hahnel
    Department of Neuroradiology, University of Heidelberg Medical School, Germany
    Neuroradiology 42:174-9. 2000
  2. ncbi request reprint [Waller's degeneration of the pyramidal tract after ischemic stroke]
    S Hahnel
    Rofo 177:1337-9. 2005
  3. ncbi request reprint [Current use and possible future applications of the magnetization transfer technique in neuroradiology]
    S Hahnel
    Abteilung Neuroradiologie, Neurologische Klinik, Universitatsklinikum Heidelberg
    Rofo 176:175-82. 2004
  4. ncbi request reprint [Infectious diseases of brain parenchyma in adults: imaging and differential diagnosis aspects]
    S Hahnel
    Abt Neuroradiologie, Neurologische Klinik, Universitatsklinikum Heidelberg
    Rofo 177:1349-65. 2005
  5. ncbi request reprint Treatment of intracranial stenoses using the Neuroform stent system: initial experience in five cases
    Stefan Hahnel
    Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Center, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany
    Neuroradiology 48:479-85. 2006
  6. ncbi request reprint Local intra-arterial fibrinolysis of thromboemboli occurring during neuroendovascular procedures with recombinant tissue plasminogen activator
    Stefan Hahnel
    Division of Neuroradiology, University of Heidelberg Medical Center, Heidelberg, Germany
    Stroke 34:1723-8. 2003
  7. ncbi request reprint Craniofacial duplication (diprosopus): CT, MR imaging, and MR angiography findings case report
    Stefan Hahnel
    Department of Neuroradiology, University of Heidelberg Medical School, Germany
    Radiology 226:210-3. 2003
  8. ncbi request reprint 3.0 Tesla contrast-enhanced MR angiography of carotid artery stents: in vitro measurements as compared with 1.5 Tesla
    S Hahnel
    Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Center, Im Neuenheimer Feld 400, D 69120 Heidelberg, Germany
    J Neuroradiol 33:75-80. 2006
  9. ncbi request reprint Prevalence of cerebral microhemorrhages in amateur boxers as detected by 3T MR imaging
    S Hahnel
    Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Center, Heidelberg, Germany
    AJNR Am J Neuroradiol 29:388-91. 2008
  10. ncbi request reprint Persistent hypoglossal artery: MRI, MRA and digital subtraction angiography
    S Hahnel
    Department of Neuroradiology, University of Heidelberg Medical School Germany
    Neuroradiology 43:767-9. 2001

Detail Information

Publications30

  1. ncbi request reprint Magnetisation transfer ratio is low in normal-appearing cerebral white matter in patients with normal pressure hydrocephalus
    S Hahnel
    Department of Neuroradiology, University of Heidelberg Medical School, Germany
    Neuroradiology 42:174-9. 2000
    ..MT measurements give additional information which cannot be gained by conventional MRI, suggesting that NPH is associated with diffuse white matter damage, even in normal-appearing cerebral white matter...
  2. ncbi request reprint [Waller's degeneration of the pyramidal tract after ischemic stroke]
    S Hahnel
    Rofo 177:1337-9. 2005
  3. ncbi request reprint [Current use and possible future applications of the magnetization transfer technique in neuroradiology]
    S Hahnel
    Abteilung Neuroradiologie, Neurologische Klinik, Universitatsklinikum Heidelberg
    Rofo 176:175-82. 2004
    ..We describe the physical rationale of the MT technique and present the most important current and possible future applications of MT imaging to answer clinical and scientific questions in neuroradiology...
  4. ncbi request reprint [Infectious diseases of brain parenchyma in adults: imaging and differential diagnosis aspects]
    S Hahnel
    Abt Neuroradiologie, Neurologische Klinik, Universitatsklinikum Heidelberg
    Rofo 177:1349-65. 2005
    ..In this review we present the imaging criteria for the most important brain infections in adults and discuss in detail differential diagnostic aspects...
  5. ncbi request reprint Treatment of intracranial stenoses using the Neuroform stent system: initial experience in five cases
    Stefan Hahnel
    Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Center, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany
    Neuroradiology 48:479-85. 2006
    ..We assessed the technical feasibility of balloon-assisted angioplasty with consecutive stenting using a flexible, self-expanding neurovascular stent for the treatment of intracranial arteriosclerotic vascular stenoses...
  6. ncbi request reprint Local intra-arterial fibrinolysis of thromboemboli occurring during neuroendovascular procedures with recombinant tissue plasminogen activator
    Stefan Hahnel
    Division of Neuroradiology, University of Heidelberg Medical Center, Heidelberg, Germany
    Stroke 34:1723-8. 2003
    ..We report our technique for treating LIF of intracerebral thromboemboli occurring during neuroendovascular procedures...
  7. ncbi request reprint Craniofacial duplication (diprosopus): CT, MR imaging, and MR angiography findings case report
    Stefan Hahnel
    Department of Neuroradiology, University of Heidelberg Medical School, Germany
    Radiology 226:210-3. 2003
    ..Computed tomography, magnetic resonance (MR) imaging, and MR angiography allowed study of the degree of duplicative changes in diprosopus, especially for planning cosmetic correction...
  8. ncbi request reprint 3.0 Tesla contrast-enhanced MR angiography of carotid artery stents: in vitro measurements as compared with 1.5 Tesla
    S Hahnel
    Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Center, Im Neuenheimer Feld 400, D 69120 Heidelberg, Germany
    J Neuroradiol 33:75-80. 2006
    ..To assess the appearance of carotid artery stents at 3.0 Tesla contrast enhanced magnetic resonance angiography (CE-MRA) as compared with 1.5 Tesla...
  9. ncbi request reprint Prevalence of cerebral microhemorrhages in amateur boxers as detected by 3T MR imaging
    S Hahnel
    Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Center, Heidelberg, Germany
    AJNR Am J Neuroradiol 29:388-91. 2008
    ..We wanted to determine whether cerebral microhemorrhages occur more often in amateur boxers than in nonboxers...
  10. ncbi request reprint Persistent hypoglossal artery: MRI, MRA and digital subtraction angiography
    S Hahnel
    Department of Neuroradiology, University of Heidelberg Medical School Germany
    Neuroradiology 43:767-9. 2001
    ..We present the MRI, MRA and digital subtraction angiography (DSA) findings in a persistent hypoglossal artery found incidentally in a patient with cutaneous and intracranial haemangiomata...
  11. ncbi request reprint [Clinically silent cerebral embolisms after cerebral catheter angiography]
    S Hahnel
    Abt Neuroradiologie, Universitatsklinikum Heidelberg
    Rofo 173:300-5. 2001
    ..To assess for the incidence of clinically silent cerebral lesions after cerebral catheter angiography...
  12. ncbi request reprint Small-vessel stents for intracranial angioplasty: in vitro comparison of different stent designs and sizes by using CT angiography
    Stefan Hahnel
    Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Center, Germany
    AJNR Am J Neuroradiol 24:1512-6. 2003
    ..Our purpose was to evaluate whether CT angiography is a suitable alternative to conventional angiography in the evaluation of small-vessel stents for intracranial angioplasty...
  13. ncbi request reprint Operative correction of conjoined twins fused at head
    Bibiana Kotrikova
    Department of Oral and Maxillofacial Surgery, University of Heidelberg, Im Neuenheimer Feld 400, D 69120 Heidelberg, Germany
    Lancet 364:1958. 2004
  14. doi request reprint In vitro comparison of different carotid artery stents: a pixel-by-pixel analysis using CT angiography and contrast-enhanced MR angiography at 1.5 and 3 T
    Michael Lettau
    Division of Neuroradiology, Department of Neurology, University of Heidelberg, Medical Center, Im Neuenheimer Feld 400, Heidelberg, Germany
    Neuroradiology 52:823-30. 2010
    ..The purpose of this study was to compare CTA, contrast-enhanced MRA (CEMRA) at 1.5 T, and CEMRA at 3 T for the visualization of carotid artery stents and to define the best noninvasive imaging technique for each stent...
  15. doi request reprint Angiographic CT: in vitro comparison of different carotid artery stents-does stent orientation matter?
    Michael Lettau
    Division of Neuroradiology, Department of Neurosurgery, University of Freiburg Medical Center, Breisacher Str 64, 79106 Freiburg, Germany
    Neuroradiology 55:675-82. 2013
    ....
  16. ncbi request reprint MR imaging-based volumetry in patients with early-treated phenylketonuria
    Nadine H Pfaendner
    Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Center, Heidelberg, Germany
    AJNR Am J Neuroradiol 26:1681-5. 2005
    ..Our purpose was to specify the most severely affected brain structures in early treated phenylketonuria regarding volume loss and establish possible correlations between volume loss and plasma levels of phenylalanine (Phe)...
  17. doi request reprint [Magnetic resonance imaging of stents: quantitative in vitro examination at 3 Tesla]
    Julia Reinhardt
    Sektion Experimentelle Radiologie, Neurologische Universitätsklinik Heidelberg, Im Neuenheimer Feld 400, D 69120 Heidelberg, Germany
    Z Med Phys 19:278-87. 2009
    ..We were particularly interested whether sequence type and orientation of the stent with respect to the static magnetic field influences the artifact...
  18. doi request reprint Treatment of a wide-necked aneurysm of the anterior cerebral artery using two Enterprise stents in "Y"-configuration stenting technique and coil embolization: a technical note
    Stefan Rohde
    Department of Neuroradiology, University of Heidelberg Medical Centre, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
    Neuroradiology 52:231-5. 2010
    ..We report a 52-year-old woman with recurrence of a wide-necked aneurysm of the anterior cerebral artery that was successfully retreated by stent-assisted coiling using the "Y"-stenting technique with the Enterprise stent system...
  19. ncbi request reprint MRI volumetry for the preoperative diagnosis of trigeminal neuralgia
    Bodo Kress
    Division of Neuroradiology, Department of Neurology, Medical Center, University of Heidelberg, Germany
    Eur Radiol 15:1344-8. 2005
    ..The measured volume difference between the healthy and the affected nerve in patients with neuralgia is indicative of trigeminal nerve atrophy resulting from damage to the nerve...
  20. doi request reprint MRI in patients with acute basilar artery occlusion - DWI lesion scoring is an independent predictor of outcome
    Simon Nagel
    Department of Neurology, University of Heidelberg, Heidelberg, Germany
    Int J Stroke 7:282-8. 2012
    ..We analyzed early diffusion-weighted magnetic resonance imaging of patients with acute basilar artery occlusion by applying different lesion scoring systems and determined their predictive value for favorable outcome...
  21. ncbi request reprint Operative correction and follow-up of craniofacial duplication
    Bibiana Kotrikova
    Department of Oral and Maxillofacial Surgery, University of Heidelberg, Heidelberg, Germany
    Plast Reconstr Surg 119:985-91. 2007
    ..Duplication of specific structures, such as the nose (diprosopus dirrhinus), eyes (diprosopus tetraophthalmus), and ears, is possible. The authors present a case of partial facial duplication (diprosopus dirrhinus) in a male infant...
  22. ncbi request reprint Visualization of intrarenal vessels by 3.0-T MR angiography in comparison with digital subtraction angiography using renal specimens
    Jens Peter Schenk
    Department of Paediatric Radiology, University of Heidelberg, Im Neuenheimer Feld 153, 69120, Heidelberg, Germany
    Pediatr Radiol 36:1075-81. 2006
    ..MRI at 3.0 T enables high-spatial resolution for renal MR angiography...
  23. ncbi request reprint Age- and tooth-related pulp cavity signal intensity changes in healthy teeth: a comparative magnetic resonance imaging analysis
    Bodo Kress
    Division of Neuroradiology, Department of Neurology, University of Heidelberg, Heidelberg, Germany
    Oral Surg Oral Med Oral Pathol Oral Radiol Endod 103:134-7. 2007
    ..To determine if it is possible to measure age-related pulp cavity signal intensity changes by using magnetic resonance imaging (MRI)...
  24. ncbi request reprint Robust localization and lateralization of human language function: an optimized clinical functional magnetic resonance imaging protocol
    Christoph Stippich
    Department of Neurology, University of Heidelberg Medical Center, Im Neuenheimer Feld 400, D 69120 Heidelberg, Germany
    Neurosci Lett 346:109-13. 2003
    ..The data provided further evidence for the high anatomical variability of language areas, which underlined the relevance of an individual language localization and lateralization prior to brain surgery...
  25. ncbi request reprint Fully automated localization of the human primary somatosensory cortex in one minute by functional magnetic resonance imaging
    Christoph Stippich
    Division of Neuroradiology, Department of Neurology, University of Heidelberg Medical Center, Im Neuenheimer Feld 400, D 69120 Heidelberg, Germany
    Neurosci Lett 364:90-3. 2004
    ..15, r = 0.78). Compared to the mean scan time of other clinical fMRI protocols (174 s) a reduction of 62% was achieved...
  26. ncbi request reprint Image stacking with entropy values in conventional angiography: initial experience
    Holger Schmitt
    Department of Neuroradiology, University of Heidelberg Medical Center, Im Neuenheimer Feld 400, D 69120 Heidelberg, Germany
    Radiology 230:294-8. 2004
    ..Results indicate that the entropy images show more vascular detail in small peripheral vessels and increased contrast-to-noise ratio by up to a factor of 1.97 compared with maximum opacity images...
  27. ncbi request reprint Multimodal functional imaging of prolonged neurological deficits in a patient suffering from familial hemiplegic migraine
    Alexander Gutschalk
    Department of Neurology, University of Heidelberg, 69120 Heidelberg, Germany
    Neurosci Lett 332:115-8. 2002
    ..We hypothesize that this finding provides evidence for a primary neuronal dysfunction causing the prolonged neurological deficits in FHM...
  28. ncbi request reprint An automated method for volumetric quantification of magnetization transfer of the brain
    Gregor Jost
    Department of Neuroradiology, University of Heidelberg Medical School, Germany
    Magn Reson Imaging 20:593-7. 2002
    ..7-4.0%). With our technique, we expect to be able to better recognize and follow up the progression of white matter diseases. Due to the high reproducibility, this volumetric approach is specifically suitable for longitudinal MT studies...
  29. ncbi request reprint The value of magnetic resonance imaging in the diagnosis of orbital floor fractures
    Michael Freund
    Department of Neuroradiology, University of Heidelberg Medical School, Germany
    Eur Radiol 12:1127-33. 2002
    ..Magnetic resonance imaging is superior to CT in showing soft tissue herniations; therefore, MRI may have a role as an adjunct to CT if soft tissue entrapment remains unclear...
  30. doi request reprint The use of danaparoid to manage coagulopathy in a neurosurgical patient with heparin-induced thrombocytopenia type II and intracerebral haemorrhage
    Daniel N Hertle
    Department of Neurosurgery, Ruprecht Karls Universitat, Heidelberg, Germany
    Br J Neurosurg 25:117-9. 2011
    ..This patient was treated with platelet substitution and neurosurgical haematoma evacuation. Anticoagulation with 2500 units danaparoid per day was sufficient for therapy of thrombosis and no rebleeding occurred...