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Mallio CA, Quattrocchi CC, Rovira À, Parizel PM. Gadolinium Deposition Safety: Seeking the Patient's Perspective. AJNR Am J Neuroradiol 2020; 41:944-946. [PMID: 32381539 DOI: 10.3174/ajnr.a6586] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Affiliation(s)
- J Desimpel
- Department of Radiology, Antwerp University Hospital (UZA), Wilrijkstraat 10, 2650, Edegem, Belgium.
| | - P M Parizel
- Department of Radiology, Antwerp University Hospital (UZA), Wilrijkstraat 10, 2650, Edegem, Belgium
| | - S Dekeyzer
- Department of Radiology, Antwerp University Hospital (UZA), Wilrijkstraat 10, 2650, Edegem, Belgium
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Paelinck BP, Laga S, De Bock D, Bosmans JM, Claeys MJ, Haine S, Vermeulen T, Parizel PM, Rodrigus IE. P458Multimodality imaging and long-term outcome after pericardiectomy for constrictive pericarditis: a single center case series. Eur Heart J Cardiovasc Imaging 2019. [DOI: 10.1093/ehjci/jez118.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - S Laga
- Antwerp University Hospital, Edegem, Belgium
| | - D De Bock
- Antwerp University Hospital, Edegem, Belgium
| | - J M Bosmans
- Antwerp University Hospital, Edegem, Belgium
| | - M J Claeys
- Antwerp University Hospital, Edegem, Belgium
| | - S Haine
- Antwerp University Hospital, Edegem, Belgium
| | - T Vermeulen
- Antwerp University Hospital, Edegem, Belgium
| | - P M Parizel
- Antwerp University Hospital, Edegem, Belgium
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Parizel PM, Van Rompaey V, Van Loock R, Van Hecke W, Van Goethem JW, Leemans A, Sijbers J. Influence of User-Defined Parameters on Diffusion Tensor Tractography of the Corticospinal Tract. Neuroradiol J 2016; 20:139-47. [PMID: 24299634 DOI: 10.1177/197140090702000202] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2007] [Accepted: 03/19/2007] [Indexed: 11/16/2022] Open
Abstract
This study discusses the influence of user-defined parameters on fiber tracking results obtained from a standard deterministic streamline tractography algorithm. Diffusion tensor imaging with fiber tractography was performed in five healthy volunteers. A region of interest was highlighted in the ventral part of the pons at the level of the middle cerebellar peduncle. The parameters studied were angle threshold, fractional anisotropy threshold, step length and number of seed samples per voxel. Changes in fiber tracts were described for increasing values per parameter. Increasing the angle threshold resulted in more and longer fibers. A higher fractional anisotropy threshold resulted in decreased length and fiber tracts that were not representative. Increasing the step length decreased the fiber continuity and altered its position. A higher number of seed samples per voxel resulted in a higher fiber tract density. When interpreting diffusion tensor images, the reader should understand the influence of user-defined settings on the results, and should be aware of the inter-dependency of fiber tracking parameters.
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Affiliation(s)
- P M Parizel
- Department of Radiology and Medical Imaging, University Hospital Antwerp; Edegem, Belgium -
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Ranschaert ER, van Ooijen PMA, Lee S, Ratib O, Parizel PM. Social media for radiologists: an introduction. Insights Imaging 2015; 6:741-52. [PMID: 26395089 PMCID: PMC4656232 DOI: 10.1007/s13244-015-0430-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 08/17/2015] [Accepted: 09/03/2015] [Indexed: 12/02/2022] Open
Abstract
Abstract Social media, which can be defined as dynamic and interactive online communication forums, are becoming increasingly popular, not only for the general public but also for radiologists. In addition to assisting radiologists in finding useful profession-related information and interactive educational material in all kinds of formats, they can also contribute towards improving communication with peers, clinicians, and patients. The growing use of social networking in healthcare also has an impact on the visibility and engagement of radiologists in the online virtual community. Although many radiologists are already using social media, a large number of our colleagues are still unaware of the wide spectrum of useful information and interaction available via social media and of the added value these platforms can bring to daily practice. For many, the risk of mixing professional and private data by using social media creates a feeling of insecurity, which still keeps radiologists from using them. In this overview we aim to provide information on the potential benefits, challenges, and inherent risks of social media for radiologists. We will provide a summary of the different types of social media that can be of value for radiologists, including useful tips on how to use them safely and efficiently. Main Messages • Online social networking enhances communication and collaboration between peers • Social media facilitate access to educational and scientific information • Recommendations and guidelines from policymakers and professional organisations are needed • Applications are desired for efficient and secure exchange of medical images in social media
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Affiliation(s)
- Erik R Ranschaert
- Department of Medical Imaging, Jeroen Bosch Ziekenhuis, Postbus 90153, 5200 ME, 's-Hertogenbosch, The Netherlands.
| | - P M A van Ooijen
- Department of Radiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Simon Lee
- PR & Media Department, European Society of Radiology, Neutorgasse 9, 1010, Vienna, Austria
| | - Osman Ratib
- Department of Medical Imaging and Information Sciences, University Hospital of Geneva, Geneva, Switzerland
| | - P M Parizel
- Department of Radiology, Antwerp University Hospital & University of Antwerp, Antwerp, Belgium
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Ierssel S, Conraads VM, Craenenbroeck EM, Liu Y, Maas AI, Parizel PM, Hoymans VY, Vrints CJ, Jorens PG. Endothelial dysfunction in acute brain injury and the development of cerebral ischemia. Crit Care 2015. [PMCID: PMC4472828 DOI: 10.1186/cc14523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Smets K, Deconinck T, Baets J, Sieben A, Martin JJ, Smouts I, Wang S, Taroni F, Di Bella D, Van Hecke W, Parizel PM, Jadoul C, De Potter R, Couvreur F, Rugarli E, De Jonghe P. Partial deletion of AFG3L2 causing spinocerebellar ataxia type 28. Neurology 2014; 82:2092-100. [DOI: 10.1212/wnl.0000000000000491] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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De Backer W, Vos W, Van Holsbeke C, Vinchurkar S, Claes R, Hufkens A, Parizel PM, Bedert L, De Backer J. The effect of roflumilast in addition to LABA/LAMA/ICS treatment in COPD patients. Eur Respir J 2014; 44:527-9. [DOI: 10.1183/09031936.00011714] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Van Holsbeke CS, Leemans G, Vos WG, De Backer JW, Vinchurkar SC, Geldof M, Verdonck PR, Parizel PM, Van Schil PE, De Backer WA. Functional Respiratory Imaging as a Tool to Personalize Respiratory Treatment in Patients With Unilateral Diaphragmatic Paralysis. Respir Care 2013; 59:e127-31. [DOI: 10.4187/respcare.02756] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Salgado R, Parizel PM. Imaging of the aortic root and ascending aorta. JBR-BTR 2013; 96:402-406. [PMID: 24617200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Affiliation(s)
- R Salgado
- Department of Radiology, Antwerp University Hospital, Edegem, Belgium
| | - P M Parizel
- Department of Radiology, Antwerp University Hospital, Edegem, Belgium
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Paelinck BP, Vandendriessche T, De Bock D, De Maeyer C, Parizel PM, Christiaan J. 1038CMR assessment of left ventricular remodeling after
percutaneous edge-to-edge repair using MitraClip. A case. Eur Heart J Cardiovasc Imaging 2013. [DOI: 10.1093/ehjci/jet070bt] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Parizel PM, Carpentier K, Van Marck V, Venstermans C, De Belder F, Van Goethem J, van den Hauwe L, Menovsky T. Pneumosinus dilatans in anterior skull base meningiomas. Neuroradiology 2012; 55:307-11. [PMID: 23129016 DOI: 10.1007/s00234-012-1106-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 10/12/2012] [Indexed: 10/27/2022]
Abstract
INTRODUCTION Skull base meningiomas are often missed on non-contrast CT or MR examinations due to their close proximity to bone and low lesion to brain contrast. The purpose of this study is to illustrate that pneumosinus dilatans can be an indicator of anterior skull base meningiomas. METHODS A retrospective search of the radiology information system and picture archiving and computing system database was performed. Search terms were "meningioma" in association with "pneumosinus dilatans." Medical records and imaging studies were reviewed independently by two experienced neuroradiologists and were read in consensus. We recorded the patient age at the time of discovery of the meningioma, main presenting symptom(s), location of the tumor, and imaging characteristics. We also performed a comparative literature search for pneumosinus dilatans and its association with meningiomas. RESULTS Ten patients (six women; four men) were identified in whom a meningioma of the anterior skull base was associated with a pneumosinus dilatans. Three patients had multiple meningiomas, so a total of 14 intracranial tumors were identified. Mean age at discovery was 59 years with an age range of ± 20years. All meningiomas were diagnosed by MRI and/or CT. CONCLUSION Pneumosinus dilatans can be a helpful sign to indicate the presence of a meningioma of the anterior skull base.
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Affiliation(s)
- P M Parizel
- Department of Radiology, Antwerp University Hospital, University of Antwerp, Wilrijkstraat 10, 2650 Edegem, Belgium.
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Bosmans JML, Peremans L, Menni M, De Schepper AM, Duyck PO, Parizel PM. Structured reporting: if, why, when, how-and at what expense? Results of a focus group meeting of radiology professionals from eight countries. Insights Imaging 2012; 3:295-302. [PMID: 22696090 PMCID: PMC3369122 DOI: 10.1007/s13244-012-0148-1] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Revised: 12/16/2011] [Accepted: 01/20/2012] [Indexed: 11/30/2022] Open
Abstract
Purpose To determine why, despite growing evidence that radiologists and referring physicians prefer structured reporting (SR) to free text (FT) reporting, SR has not been widely adopted in most radiology departments. Methods A focus group was formed consisting of 11 radiology professionals from eight countries. Eight topics were submitted for discussion. The meeting was videotaped, transcribed, and analyzed according to the principles of qualitative healthcare research. Results Perceived advantages of SR were facilitation of research, easy comparison, discouragement of ambiguous reports, embedded links to images, highlighting important findings, not having to dictate text nobody will read, and automatic translation of teleradiology reports. Being compelled to report within a rigid frame was judged unacceptable. Personal convictions appeared to have high emotional value. It was felt that other healthcare stakeholders would impose SR without regard to what radiologists thought of it. If the industry were to provide ready-made templates for selected examinations, most radiologists would use them. Conclusion If radiologists can be convinced of the advantages of SR and the risks associated with failing to participate actively in its implementation, they will take a positive stand. The industry should propose technology allowing SR without compromising accuracy, completeness, workflows, and cost-benefit balance. Main Messages • Structured reporting offers radiologists opportunities to improve their service to other stakeholders. • If radiologists can be convinced of the advantages of structured reporting, they may become early adopters. • The healthcare industry should propose technology allowing structured reporting. • Structured reporting will fail if it compromises accuracy, completeness, workflows or cost-benefit balance.
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Vanhoenacker FM, Van Looveren K, Trap K, Desimpelaere J, Wouters K, Van Dyck P, Parizel PM, De Schepper AM. Grading and characterization of soft tissue tumors on magnetic resonance imaging: the value of an expert second opinion report. Insights Imaging 2012; 3:131-8. [PMID: 22696039 PMCID: PMC3314736 DOI: 10.1007/s13244-012-0151-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2011] [Revised: 01/09/2012] [Accepted: 01/23/2012] [Indexed: 01/27/2023] Open
Abstract
Objective To retrospectively compare the accuracy of the initial MRI (magnetic resonance imaging) report of referring radiologists and the second opinion report. Material and methods MRI of 155 patients presenting with a soft tissue tumor (STT) in a single large community center were referred for inclusion in the Belgian Soft Tissue Neoplasm Registry (BSTNR). The initial report and the second opinion report were made independently. Histopathology (gold standard) was obtained in 90 patients (group 1). In 65 patients, the diagnosis was made by the combination of clinical findings and/or follow-up (group 2). In group 1, the concordance in grading and tissue-specific (TS) diagnosis between the referring center (RC) and expert center (EC) was reviewed. Results In group 1, MR grading yields a sensitivity of 100% and a specificity of 89% in the EC. The sensitivity was 88% and the specificity 81% in the RC. The accuracy was significantly higher in the EC (92%) compared to the RC (83%) (p = 0.039). The TS diagnosis was correct in 50% versus 38.5% of malignant tumors and in 71.8% versus 51.6% of benign tumors in the EC and RC respectively. Conclusion A second opinion report increases the accuracy in the diagnosis of STT on MRI. Main Messages • A second opinion MRI report increases the overall accuracy in the diagnosis of soft tissue tumors. • There is a good overall agreement in MR grading between the referring and expert institution. • In the expert center, there were fewer false-negative and false-positive diagnoses. • MRI performs better in the tissue-specific diagnosis of benign versus malignant STT.
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Affiliation(s)
- F M Vanhoenacker
- Dept. of Radiology, Antwerp University Hospital, University of Antwerp, Wilrijkstraat, 10, 2650, Edegem, Belgium,
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Van Herck PL, Paelinck BP, Haine SE, Claeys MJ, Miljoen H, Bosmans JM, Parizel PM, Vrints CJ. Impaired coronary flow reserve after a recent myocardial infarction: correlation with infarct size and extent of microvascular obstruction. Int J Cardiol 2012; 167:351-6. [PMID: 22244483 DOI: 10.1016/j.ijcard.2011.12.099] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2011] [Revised: 10/30/2011] [Accepted: 12/24/2011] [Indexed: 10/14/2022]
Abstract
BACKGROUND The exact relationship between the coronary flow reserve (CFR) and infarct size remains unknown. In this prospective study the relationship between the CFR both in the infarcted and remote myocardium and infarct size was investigated. Furthermore, the diagnostic value of the CFR to predict the extent of microvascular obstruction (MO) was evaluated. METHODS In thirty patients the CFR was measured with a Doppler guide wire 6 ± 3 days after a first myocardial infarction (MI) in the infarct related and in a reference coronary artery. MO and infarct size were determined with magnetic resonance imaging. RESULTS The CFR was inversely related to infarct size in the infarcted and remote myocardium (respectively, r=-0.60, p<0.01 and r=-0.62, p<0.01). In the infarcted myocardium the extent of MO was strongly related to the infarct size and was in a multivariate analysis the single significant determinant of the CFR and the hyperaemic flow. In the remote myocardium no relationship was present between infarct size and hyperaemic flow, but the baseline flow increased as the infarct size became larger (r=0.58, p<0.01). In a receiver operator characteristic (ROC) analysis, a CFR value ≤ 2 in the infarct related coronary artery offered the best sensitivity (65%) and specificity (71%) to detect the presence of MO (p<0.05). CONCLUSIONS After MI, the CFR both in the infarcted and remote myocardium is inversely related to infarct size. In the infarcted myocardium, a CFR value ≤ 2 predicts the presence of MO with moderate sensitivity and specificity.
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Affiliation(s)
- P L Van Herck
- Department of Cardiology, Antwerp University Hospital, Wilrijkstraat 10, 2650 Edegem, Belgium.
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Parizel PM, Lubicz B. Neuroradiology plays a crucial role in the management of stroke patients. JBR-BTR 2011; 94:101-102. [PMID: 21699060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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Eyselbergs M, Voormolen MH, Snoeckx A, Parizel PM. Terson's syndrome. JBR-BTR 2010; 93:274. [PMID: 21179993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Affiliation(s)
- M Eyselbergs
- Department of Radiology, Antwerp University Hospital, Edegem, Belgium
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Salgado RA, Jorens PG, Baar I, Cras P, Hans G, Parizel PM. Methadone-induced toxic leukoencephalopathy: MR imaging and MR proton spectroscopy findings. AJNR Am J Neuroradiol 2010; 31:565-6. [PMID: 19892815 DOI: 10.3174/ajnr.a1889] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
We report the clinical, MR imaging, and proton MR spectroscopy findings in a middle-aged woman with proved methadone-induced toxic leukoencephalopathy. The imaging characteristics of this unusual condition have been reported only rarely in the medical literature. We show that the imaging findings in methadone-induced toxic leukoencephalopathy are similar, though not identical, to previously reported cases of neurologic deterioration due to heroin inhalation.
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Affiliation(s)
- R A Salgado
- Department of Radiology, Antwerp University Hospital, University of Antwerp, Edegem, Belgium.
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Joosen P, Abrams P, Verhelst J, Parizel PM, Salgado R, Abs R. Panhypopituitarism apparently caused by hypophysitis masking a rapid development of a craniopharyngioma. A case report. Acta Clin Belg 2010; 65:133-5. [PMID: 20491365 DOI: 10.1179/acb.2010.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
We report the case of a 39-year-old male presenting with panhypopituitarism and diabetes insipidus. MR imaging showed focal thickening of the pituitary infundibulum and infiltration of the anterior pituitary lobe, suggesting hypophysitis. Hormonal replacement therapy induced a pronounced amelioration of general well-being. Eight months later the subject developed visual disturbances. MR imaging now showed a cystic sellar mass. Surgical drainage was performed. A second operation was necessary six weeks Later because of recurrent visual field defects. Diagnosis of papillary craniopharyngioma was finally made. This case demonstrates the remarkably rapid development of a craniopharyngioma, which initial radiological appearance was suggestive of hypophysitis. It also emphasizes the need of repeat MR examination in case of unusual presentation of hypopituitarism.
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Affiliation(s)
- P Joosen
- AZ Turnhout, Campus Sint-Jozef, Steenweg op Merksplas 44 2300 Turnhout.
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Vandist V, Deridder F, Waelput W, Parizel PM, Van de Heyning P, Van Laer C. A neuroendocrine tumour of the sphenoid sinus and nasopharynx: a case report. B-ENT 2010; 6:147-151. [PMID: 20681371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023] Open
Abstract
It is rare for neuroendocrine tumours to originate in the sphenoid sinus and the nasopharynx. Neuroendocrine tumours can be classified into typical carcinoids, atypical carcinoids and small cell neuroendocrine carcinomas. Here we report the case of a 48-year-old man with a typical carcinoid tumour of the nasopharynx and sphenoid sinus. This is a very rare diagnosis, and only a few cases of a typical carcinoid in this region have been described in the literature.
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Affiliation(s)
- V Vandist
- Department of Otorhinolaryngology, Antwerp University Hospital, Edegem, Belgium.
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Parizel PM, Rodesch G. Homage to Prof. Dr. Danielle Balériaux, elected as honorary member of ESNR 2009. Neuroradiology 2009. [DOI: 10.1007/s00234-009-0628-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Voormolen V, Geens K, Van Den Hauwe L, Parizel PM. Spontaneous closure of cerebral dural arteriovenous fistulas with direct cortical venous drainage. A case report. Interv Neuroradiol 2009; 15:359-62. [PMID: 20465922 DOI: 10.1177/159101990901500316] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2009] [Accepted: 08/18/2009] [Indexed: 11/16/2022] Open
Abstract
SUMMARY We describe two rare cases of spontaneous closure of cerebral dural arteriovenous fistulas (DAVFs) with a small nidus and draining directly in a single cortical vein with several ectasias. Eighteen previously published cases of spontaneous closure of cerebral DAVF comprised more benign fistula types. In literature, several explanations for DAVF occlusion have been proposed. We hypothesize that, in addition to the known causes, the specific contrast medium used during the diagnostic selective angiography might have played a role in the thrombosis and subsequent fistula closure.
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Affiliation(s)
- V Voormolen
- Department of Radiology, University Hospital Antwerp; Antwerp, Belgium -
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Van Dyck P, Gielen JL, Veryser J, Weyler J, Vanhoenacker FM, Van Glabbeek F, De Weerdt W, Maas M, van der Woude HJ, Parizel PM. Tears of the supraspinatus tendon: assessment with indirect magnetic resonance arthrography in 67 patients with arthroscopic correlation. Acta Radiol 2009; 50:1057-63. [PMID: 19863417 DOI: 10.3109/02841850903232723] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Magnetic resonance (MR) arthrography is generally regarded as the gold standard for shoulder imaging. As an alternative to direct MR arthrography, the less invasive indirect MR arthrography technique was proposed, offering logistic advantages because fluoroscopic or ultrasonographic guidance for joint injection is not required. PURPOSE To assess the diagnostic performance of indirect MR arthrography in the diagnosis of full- and partial-thickness supraspinatus tears in a symptomatic population. MATERIAL AND METHODS Two radiologists with different levels of experience independently and retrospectively interpreted indirect MR (1.5T) arthrograms of the shoulder obtained in 67 symptomatic patients who underwent subsequent arthroscopy. On MR, the supraspinatus tendon was evaluated for full- or partial-thickness tear. With arthroscopy as the standard of reference, sensitivity, specificity, and diagnostic accuracy of indirect MR arthrography in the detection of full- and partial-thickness tears of the supraspinatus tendon was calculated. Kappa (kappa) statistics were used for the assessment of the agreement between arthroscopic and imaging findings and for the assessment of interobserver agreement. RESULTS For full-thickness tears of the supraspinatus tendon, sensitivities, specificities, and accuracies exceeded 90% for both observers, with excellent interobserver agreement (kappa = 0.910). For partial-thickness tears, sensitivities (38-50%) and accuracies (76-78%) were poor for both reviewers, and interobserver agreement was moderate (kappa = 0.491). Discrepancies between MR diagnosis and arthroscopy were predominantly observed with small partial-thickness tears. CONCLUSION Indirect MR arthrography is highly accurate in the diagnosis of full-thickness rotator cuff tears. However, the diagnosis of partial-thickness tears with indirect MR arthrography remains faulty, because exact demarcation of degenerative change and partial rupture is difficult. On the basis of the above findings, we do not recommend indirect MR arthrography on patients for whom rotator cuff disease is suspected clinically.
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Affiliation(s)
- P. Van Dyck
- Department of Radiology, University Hospital Antwerp and University of Antwerp, Antwerp (Edegem), Belgium
| | - J. L. Gielen
- Department of Radiology, University Hospital Antwerp and University of Antwerp, Antwerp (Edegem), Belgium
| | - J. Veryser
- Department of Radiology, University Hospital Ghent and University of Ghent, Ghent, Belgium
| | - J. Weyler
- Department of Epidemiology and Social Medicine, University of Antwerp, Antwerp (Wilrijk), Belgium
| | | | - F. Van Glabbeek
- Department of Orthopedics, University Hospital Antwerp and University of Antwerp, Antwerp (Edegem), Belgium
| | - W. De Weerdt
- Department of Orthopedics, University Hospital Antwerp and University of Antwerp, Antwerp (Edegem), Belgium
| | - M. Maas
- Department of Radiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - H.-J. van der Woude
- Department of Radiology, Onze Lieve Vrouwe Gasthuis, Amsterdam, The Netherlands
| | - P. M. Parizel
- Department of Radiology, University Hospital Antwerp and University of Antwerp, Antwerp (Edegem), Belgium
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24
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Ceyssens S, Van den Wyngaert T, Blockx P, van den Hauwe L, Parizel PM, van den Hauwe L, Geens K. Lymphomatous meningosis diagnosed with [18F]-fluorodeoxyglucose-positron-emission tomography/CT. AJNR Am J Neuroradiol 2009; 30:E150-1. [PMID: 19729537 DOI: 10.3174/ajnr.a1831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Parizel PM, van der Zijden T, Gaudino S, Spaepen M, Voormolen MHJ, Venstermans C, De Belder F, van den Hauwe L, Van Goethem J. Trauma of the spine and spinal cord: imaging strategies. Eur Spine J 2009; 19 Suppl 1:S8-17. [PMID: 19727855 DOI: 10.1007/s00586-009-1123-5] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2009] [Indexed: 11/27/2022]
Abstract
Traumatic injuries of the spine and spinal cord are common and potentially devastating lesions. We present a comprehensive overview of the classification of vertebral fractures, based on morphology (e.g., wedge, (bi)concave, or crush fractures) or on the mechanism of injury (flexion-compression, axial compression, flexion-distraction, or rotational fracture-dislocation lesions). The merits and limitations of different imaging techniques are discussed, including plain X-ray films, multi-detector computed tomography (MDCT), and magnetic resonance imaging (MRI) for the detection. There is growing evidence that state-of-the-art imaging techniques provide answers to some of the key questions in the management of patients with spine and spinal cord trauma: is the fracture stable or unstable? Is the fracture recent or old? Is the fracture benign or malignant? In summary, we show that high-quality radiological investigations are essential in the diagnosis and management of patients with spinal trauma.
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Affiliation(s)
- P M Parizel
- Department of Radiology, Antwerp University Hospital and University of Antwerp, Wilrijkstraat 10, 2650, Edegem (Antwerp), Belgium.
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26
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Op de Beeck B, Peters K, Spinhoven MJ, Snoeckx A, Salgado R, Parizel PM. Asymptomatic pneumatosis intestinalis in AIDS. JBR-BTR 2009; 92:253-255. [PMID: 19999330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Pneumatosis intestinalis is an unusual entity in which subserosal or submucosal collections of gas occur in the bowel wall. We present a case of asymptomatic linear pneumatosis intestinalis and free abdominal air in a 67-year-old man with acquired immunodeficiency syndrome (AIDS) who improved spontaneously following conservative management. Pneumatosis intestinalis is a late-stage phenomenon in patients with AIDS that characteristically involves the cecum, ascending and transverse colon or the rectum with sparing of the descending colon and the sigmoid. For these patients, non-operative management is appropriate.
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Affiliation(s)
- B Op de Beeck
- Dept of Radiology, University Hospital Antwerp, Edegem, Belgium.
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27
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28
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Luyckx G, Vanhoenacker FM, Parizel PM. Chain mail calcifications in dracunculiasis. JBR-BTR 2009; 92:231. [PMID: 19803108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- G Luyckx
- Department of Radiology, Institute of Tropical Medicine, Antwerpen, Belgium
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29
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Vandervliet EJ, Vanhoenacker FM, De Praeter G, Vangeneugden J, Parizel PM. Symptomatic Rathke's cleft cyst. JBR-BTR 2009; 92:180-181. [PMID: 19670588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- E J Vandervliet
- Department of Radiology, AZ Sint-Maarten, Duffel-Mechelen, Duffel, Belgium
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30
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Van Dyck P, Gielen JL, Veryser J, Weyler J, Vanhoenacker FM, Van Glabbeek F, De Weerdt W, Maas M, van der Woude HJ, Parizel PM. Tears of the Supraspinatus Tendon: Assessment with Indirect Magnetic Resonance Arthrography in 67 Patients with Arthroscopic Correlation. Acta Radiol 2009. [DOI: 10.1080/02841850903232723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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31
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Eyselbergs M, Snoeckx A, Op de Beeck B, Parizel PM. Foreign body aspiration. JBR-BTR 2009; 92:64. [PMID: 19358494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Affiliation(s)
- M Eyselbergs
- Department of Radiology, Antwerp University Hospital, Edegem, Belgium
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32
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Peeters J, Vanhoenacker FM, Marchal P, Mulkens T, Ghysen D, Myncke J, Van Dyck P, Gielen JL, Termote JL, Parizel PM. Imaging of femoroacetabular impingement: pictorial review. JBR-BTR 2009; 92:35-42. [PMID: 19358486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Femoroacetabular impingement (FAI) is a cause of progressive osteoarthritis of the hip in younger patients. Three types of FAI have been described: a cam-type, a pincer-type and a mixed type. Early recognition of the morphologic hip features of each type of impingement is important, because arthroscopic treatment is still successful in the initial stage to prevent or delay further hip degeneration. This article reviews the imaging features of the different types of FAI. Magnetic resonance arthrography (MRA) is the preferred modality to detect, localise and characterise the type of FAI and the resulting injuries of the acetabular hyaline cartilage and fibrocartilaginous labrum.
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Affiliation(s)
- J Peeters
- Dept. of Radiology, University Hospital Antwerp UZA, University of Antwerp,Wilrijkstraat 10, B-2650 Edegem, Belgium.
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33
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Snoeckx A, Vanhoenacker FM, Verhaert K, Chappelle K, Parizel PM. Gorlin-Goltz syndrome in a child: case report and clinical review. JBR-BTR 2008; 91:235-239. [PMID: 19202996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Gorlin-Goltz syndrome is a rare autosomal dominant disorder that involves multiple organ systems, including the skin, skeleton and jaws. We report the case of a mild mentally retarded 7-year-old boy who was referred with a swelling of his left mandible. Imaging studies showed a unilocular well-defined lytic mandibular lesion, calcifications of the falx, bifid ribs and fusion anomalies of the ribs. The mandibular lesion was treated with surgical decompression and proved to represent a keratocyst on histological examination. Further clinical examination revealed cutaneous lesions, Sprengel deformity, pectus excavatum and facial dysmorphism. Based on the combination of imaging and clinical findings the diagnosis of Gorlin-Goltz syndrome was made. This was confirmed by genetic tests. During three-year follow-up the boy presented with recurrent and multiple odontogenic keratocysts. The occurrence of multiple and recurrent keratocysts at young age, should alert the radiologist to the potential diagnosis of an underlying Gorlin-Goltz syndrome. This paper reviews the imaging findings in Gorlin-Goltz syndrome, with emphasis on maxillofacial imaging.
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Affiliation(s)
- A Snoeckx
- Department of Radiology, Antwerp University Hospital, Wilrijkstraat 10, B-2650 Edegem, Belgium.
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34
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Snoeckx A, Vanhoenacker FM, Op de Beeck B, Parizel PM. "Mercedes Benz" sign. JBR-BTR 2008; 91:270. [PMID: 19203005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Affiliation(s)
- A Snoeckx
- Department of Radiology, Antwerp University Hospital, Belgium
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35
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Snoeckx A, Vanhoenacker FM, Gielen JL, Van Dyck P, Parizel PM. Magnetic resonance imaging of variants of the knee. Singapore Med J 2008; 49:734-744. [PMID: 18830550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Magnetic resonance imaging has become the imaging modality of choice for evaluation of internal derangements of the knee. Anatomical variants are often an incidental finding on these examinations. Knowledge and recognition of variants is important, not only to avoid misdiagnosis but also to avoid additional imaging and over-treatment. This pictorial essay provides an overview of variants encountered during a review of 1,873 magnetic resonance imaging examinations of the knee. Emphasis is laid on these variants that are clinically important.
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Affiliation(s)
- A Snoeckx
- Department of Radiology, Antwerp University Hospital, University of Antwerp, Wilrijkstraat 10, B-2650 Edegem, Belgium
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36
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Seerden TC, Moreels TG, Salgado RA, Francque SM, Michielsen PP, Parizel PM, Pelckmans PA. Intestinal bowel perforation and bacterial peritonitis secondary to migrated biliary and pancreatic stents. Endoscopy 2008; 40 Suppl 2:E25. [PMID: 18278716 DOI: 10.1055/s-2007-966961] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- T C Seerden
- Division of Gastroenterology and Hepatology, Antwerp University Hospital, Antwerp, Belgium
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37
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Vanhoenacker FM, Herz R, Vandervliet EJ, Parizel PM. The Mount Fuji sign in tension pneumocephalus. JBR-BTR 2008; 91:175. [PMID: 18817098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- F M Vanhoenacker
- Department of Radiology and Neurosurgery, AZ Sint-Maarten Duffel-Mechelen, Belgium
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38
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De Cuyper K, Vanhoenacker FM, Hintjens J, Verstraete KL, Parizel PM. Nasopalatine duct cyst. JBR-BTR 2008; 91:179. [PMID: 18817102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- K De Cuyper
- Department of Radiology, UZ Ghent, Ghent, Belgium
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39
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Luyckx G, Vanhoenacker FM, Parizel PM. Exotic pathology of the hand and foot. A pictorial review. JBR-BTR 2008; 91:160-165. [PMID: 18817091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In this article, the imaging findings of the most frequently encountered import pathology of the hand and foot are reviewed, including leprosy, loiasis, snake bites or penetration of spines of sea urchins in the hand and foot. Our objective is to familiarize the radiologist of the Western countries with these diseases, which are still prevalent in developing areas. Due to the rising traveling to foreign countries and continuous immigration, it is important that these disorders be considered in the differential diagnosis in a specific population of asylum-seekers, economic refugees and any other group of persons traveling around the globe. Imaging findings on conventional radiography will be emphasized.
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Affiliation(s)
- G Luyckx
- Department of Radiology, Institute of Tropical Medicine, Antwerpen, Belgium.
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40
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Snoeckx A, Vanhoenacker FM, Parizel PM. Popcorn calcifications in osteogenesis imperfecta. JBR-BTR 2008; 91:176. [PMID: 18817099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- A Snoeckx
- Dept. of Radiology, Antwerp University Hospital, Edegem, Belgium
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41
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Boudewyns AN, Declau F, De Ridder D, Parizel PM, van den Ende J, Van de Heyning PH. Case report: "auditory neuropathy" in a newborn caused by a cerebellopontine angle arachnoid cyst. Int J Pediatr Otorhinolaryngol 2008; 72:905-9. [PMID: 18355927 DOI: 10.1016/j.ijporl.2008.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2007] [Revised: 01/29/2008] [Accepted: 02/04/2008] [Indexed: 11/26/2022]
Abstract
We present a 6-week-old girl, referred because of failed newborn hearing screening in the right ear. Click-evoked oto-acoustic emissions were present in both ears, auditory brainstem responses (ABR) were present in the left but totally absent in the right ear. A magnetic resonance imaging (MRI) study revealed a large arachnoid cyst in the right cerebellopontine angle (CPA) and a diagnosis of "auditory neuropathy/auditory dyssynchrony" was established. A microsurgical resection of the cyst wall and fenestration was performed by a retro sigmoid approach. This is the first case in the literature of auditory neuropathy (AN) in an infant caused by a cerebellopontine angle arachnoid cyst.
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Affiliation(s)
- A N Boudewyns
- Department of Otorhinolaryngology, Head and Neck Surgery, Antwerp University Hospital, University of Antwerp, Wilrijkstraat 10, 2650 Edegem, Belgium.
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42
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Pelzers E, Van Goethem JW, van den Hauwe L, Degryse HR, Geens K, Parizel PM. Baló's concentric sclerosis. JBR-BTR 2008; 91:108-109. [PMID: 18661720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- E Pelzers
- Department of Radiology, AZ KLINA, Brasschaat, Belgium
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43
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Abstract
A wide range of vascular disorders can affect the spleen. Although clinical presentation is often nonspecific, early diagnosis and treatment are mandatory in most conditions. Noninvasive imaging techniques are well suited to meet these objectives. Familiarity with normal macroscopic and microscopic vascular anatomy is a prerequisite to understand the pathophysiology of vascular disorders of the spleen. This article deals with diseases of the splenic vasculature (aneurysms, arteriovenous fistula, splenic vein thrombosis, collateral circulation in portal hypertension) as well as vascular disorders affecting the splenic parenchyma (splenic infarct, Gamna-Gandy bodies). Primary vascular tumors and tumor-like conditions of the spleen will be discussed very briefly.
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Affiliation(s)
- F M Vanhoenacker
- Department of Radiology, University Hospital Antwerp, Wilrijkstraat, 10, B-2650 Edegem, Belgium.
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De Backer JW, Vos WG, Gorlé CD, Germonpré P, Partoens B, Wuyts FL, Parizel PM, De Backer W. Flow analyses in the lower airways: patient-specific model and boundary conditions. Med Eng Phys 2007; 30:872-9. [PMID: 18096425 DOI: 10.1016/j.medengphy.2007.11.002] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2007] [Revised: 10/08/2007] [Accepted: 11/03/2007] [Indexed: 11/18/2022]
Abstract
Computational fluid dynamics (CFD) is increasingly applied in the respiratory domain. The ability to simulate the flow through a bifurcating tubular system has increased the insight into the internal flow dynamics and the particular characteristics of respiratory flows such as secondary motions and inertial effects. The next step in the evolution is to apply the technique to patient-specific cases, in order to provide more information about pathological airways. This study presents a patient-specific approach where both the geometry and the boundary conditions (BC) are based on individual imaging methods using computed tomography (CT). The internal flow distribution of a 73-year-old female suffering from chronic obstructive pulmonary disease (COPD) is assessed. The validation is performed through the comparison of lung ventilation with gamma scintigraphy. The results show that in order to obtain agreement within the accuracy limits of the gamma scintigraphy scan, both the patient-specific geometry and the BC (driving pressure) play a crucial role. A minimal invasive test (CT scan) supplied enough information to perform an accurate CFD analysis. In the end it was possible to capture the pathological features of the respiratory system using the imaging and computational fluid dynamics techniques. This brings the introduction of this new technique in the clinical practice one step closer.
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Affiliation(s)
- J W De Backer
- University Hospital Antwerp, Department of Pulmonology, Belgium.
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45
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Vandevenne JE, Vanhoenacker FM, Parizel PM, Butts Pauly K, Lang RK. Reduction of metal artefacts in musculoskeletal MR imaging. JBR-BTR 2007; 90:345-349. [PMID: 18085188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The purpose of this article is to present a educational overview of practical tips to deal with metal artefacts in clinical musculoskeletal MRI. A brief theoretical explanation to understand the cause of metal artefacts is provided followed by a discussion on parameters to reduce these metal artefacts. Effects of adjustable parameters are demonstrated both in a volunteer with a titanium screw and a saline bag attached to the shoulder and in a in vitro experiment. These parameters include positioning of the patient with the long axis of metallic hardware parallel to B0, use of fast spin echo sequences, use of inversion recovery fat suppression, swapping phase and frequency encoding direction, use of view angle tilting, increasing the read-out bandwidth, and decreasing voxel size.
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Affiliation(s)
- J E Vandevenne
- Department of Radiology, Ziekenhuizen Oost-Limburg, Genk, Belgium.
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46
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Snoeckx A, Vanhoenacker FM, Parizel PM. Nail patella syndrome. JBR-BTR 2007; 90:457. [PMID: 18085198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Affiliation(s)
- A Snoeckx
- Department of Radiology, AZ Sint-Maarten, Duffel-Mechelen, Duffel, Belgium
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47
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Peersman B, Vanhoenacker FM, Heyman S, Van Herendael B, Stam M, Brys P, Verstraete KL, Samson I, Sybers J, Van Dyck P, Parizel PM, De Schepper AM. Ewing's sarcoma: imaging features. JBR-BTR 2007; 90:368-376. [PMID: 18085191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
AIM To define an imaging prototype of Ewing's sarcoma (ES). MATERIALS AND METHODS Sixty-four patients with a histopathologically and/or genetically proven diagnosis of ES were analyzed for clinical parameters (age, gender and location), radiographic and CT appearance (distribution, matrix, margins, periosteal reaction, articular extension, cortical reaction and the presence of a pathologic fracture). Size, local extension, signal intensity, degree and pattern of enhancement, and the presence of skip metastases were evaluated on MRI. Distant metastases were recorded on bone scintigraphy and chest CT scan. RESULTS Patient's age ranged between 7-67 (mean 17.9). Male/female ratio was 2.4/1. Location in the pelvis was most frequent (31%), followed by the femur (20%) and tibia (11%). Most tumors were mixed lytic-sclerotic (75%), and purely lytic in 25%. Plain films and CT scan showed a spiculated periosteal reaction in 50%. A Codman's triangle was seen in 27%. Articular extension was difficult to assess on radiographs. Cortical permeation and destruction is seen in respectively 31 and 42%, whereas cortical thickening is seen in 20%. Pathologic fracture occurred in 7.8%. MRI showed a large mass, with a soft tissue component of more than 50% in 67%. Degree and pattern of enhancement pattern was variable. Signal intensity on T1- and T2-WI was non-specific. Joint involvement was seen in 23%. Isolated involvement of the soft tissue (extraskeletal ES) was seen in 1.5%. Skip metastases at initial presentation were present at initial presentation in 14% and distant metastases in 22%. CONCLUSIONS ES occurs in young patients. On radiographs/CT, 37.5% are located in the axial skeleton and 62.5% in the peripheral skeleton. ES is mostly mixed sclerotic-lytic. A spiculated periosteal reaction is most frequent. The most characteristic finding on MRI is the presence of a large soft tissue mass.
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Affiliation(s)
- B Peersman
- Dept. of Radiology, University Hospital Antwerp, Belgium.
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48
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De Backer JW, Vos WG, Devolder A, Verhulst SL, Germonpré P, Wuyts FL, Parizel PM, De Backer W. Computational fluid dynamics can detect changes in airway resistance in asthmatics after acute bronchodilation. J Biomech 2007; 41:106-13. [PMID: 17698073 DOI: 10.1016/j.jbiomech.2007.07.009] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2007] [Revised: 06/18/2007] [Accepted: 07/08/2007] [Indexed: 10/23/2022]
Abstract
The effect of a bronchodilator in asthmatics is only partially described by changes in spirometric values since no information on regional differences can be obtained. Imaging techniques like high-resolution computed tomography (HRCT) provide further information but lack detailed information on specific airway responses. The aim of the present study was to improve the actual imaging techniques by subsequent analysis of the imaging data using computational fluid dynamics (CFD). We studied 14 mild to moderately severe asthmatics. Ten patients underwent HRCT before and 4h after inhalation of a novel long acting beta(2) agonist (LABA) that acts shortly after inhalation. Four patients were studied for chronic effects and underwent CT scans twice after adequate wash-out of bronchodilators. In the active group, a significant bronchodilator response was seen with a forced expiratory volume in 1s (FEV1) increase of 8.78 +/- -6.27% pred vs -3.38 +/- 6.87% pred in the control group. The changes in FEV1 correlated significantly with the changes in distal airway volume (r = 0.69, p = 0.007), total airway resistance (r = -0.73, p = 0.003) and distal airway resistance (r = -0.76, p = 0.002) as calculated with the CFD method. The changes in distal R(aw) were not fully homogeneous. In some patients with normal FEV1 at baseline, CFD-based changes in R(aw) were still detectable. We conclude that CFD calculations, based on airway geometries of asthmatic patients, provide additional information about changes in regional R(aw). All changes in the CFD-based calculated R(aw) significantly correlate with the observed changes in spirometric values therefore validating the CFD method for the studied application.
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Affiliation(s)
- J W De Backer
- Department of Pulmonology, University Hospital Antwerp, Wilrijkstraat 10, 2650 Edegem, Belgium.
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49
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Parizel PM, Voormolen M, Van Goethem JW, van den Hauwe L. Headache: when is neuroimaging needed? JBR-BTR 2007; 90:268-271. [PMID: 17966243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Affiliation(s)
- P M Parizel
- Department of Radiology, Universitair Ziekenhuis Antwerpen & University of Antwerp, Antwerp, Belgium
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50
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MESH Headings
- Breast/pathology
- Breast Implants
- Breast Neoplasms/diagnosis
- Breast Neoplasms/pathology
- Breast Neoplasms/surgery
- Carcinoma, Ductal, Breast/diagnosis
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Ductal, Breast/surgery
- Carcinoma, Intraductal, Noninfiltrating/diagnosis
- Carcinoma, Intraductal, Noninfiltrating/pathology
- Carcinoma, Intraductal, Noninfiltrating/surgery
- Carcinoma, Lobular/diagnosis
- Carcinoma, Lobular/pathology
- Carcinoma, Lobular/surgery
- Female
- Humans
- Magnetic Resonance Imaging
- Mass Screening
- Neoplasm Staging
- Neoplasms, Multiple Primary/diagnosis
- Neoplasms, Multiple Primary/pathology
- Neoplasms, Multiple Primary/surgery
- Postoperative Complications/diagnosis
- Prognosis
- Prosthesis Failure
- Sensitivity and Specificity
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Affiliation(s)
- M Van Goethem
- Department of Radiology, University Hospital Antwerp, Edegem, Belgium.
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