A5007664637- Advanced MRI Techniques and Applications
- MRI in cancer diagnosis
- Salivary Gland Tumors Diagnosis and Treatment
- Advanced Neuroimaging Techniques and Applications
- Cardiac Imaging and Diagnostics
- Radiomics and Machine Learning in Medical Imaging
- Hemoglobinopathies and Related Disorders
- Atomic and Subatomic Physics Research
- Cerebrovascular and Carotid Artery Diseases
- Fetal and Pediatric Neurological Disorders
- Cardiovascular Function and Risk Factors
- Salivary Gland Disorders and Functions
- Renal and Vascular Pathologies
- Aortic Disease and Treatment Approaches
- Iron Metabolism and Disorders
- Bone Tumor Diagnosis and Treatments
- Medical Imaging Techniques and Applications
- Congenital Heart Disease Studies
- Aortic aneurysm repair treatments
- Prostate Cancer Diagnosis and Treatment
- Vascular Procedures and Complications
- Cardiovascular Health and Disease Prevention
- Ophthalmology and Eye Disorders
- Cardiac pacing and defibrillation studies
- Oral and Maxillofacial Pathology
Siemens Healthcare (Germany)
2010-2024
Universität Hamburg
2004-2016
Siemens (Germany)
2004-2015
Philips (Germany)
2012
University Medical Center Hamburg-Eppendorf
2004-2009
University of Regensburg
2009
Medical Solutions
2005-2009
Eppendorf (Germany)
2007-2008
University Hospital Schleswig-Holstein
2007
University of Lübeck
2007
<b>BACKGROUND AND PURPOSE:</b> Our aim was to determine the value of echo-planar diffusion-weighted MR imaging (epiDWI) in differentiating various types primary parotid gland tumors. <b>MATERIALS METHODS:</b> One hundred forty-nine consecutive patients with suspected tumors were examined an epiDWI sequence by using a 1.5T unit. Image analysis performed 2 radiologists independently, and intraclass correlation coefficient computed. Histologic diagnosis obtained every patient. For comparison...
Different software programs are available for the evaluation of 4D Flow cardiovascular magnetic resonance (CMR). A good agreement results between is a prerequisite acceptance method. Therefore, goal was to compare quantitative from cross-over comparison in individuals examined on two scanners different vendors analyzed with four postprocessing packages. Eight healthy subjects (27 ± 3 years, women) were each 3T CMR systems (Ingenia, Philips Healthcare; MAGNETOM Skyra, Siemens Healthineers)...
To investigate the feasibility of using diffusion-weighted (DW) echo-planar imaging (EPI) for differentiating primary parotid gland tumors.Fifty consecutive patients with a suspected tumor were examined DW EPI sequence (TR 1,500 msec, TE 77 field view 250 x mm, pixel size 2.10 1.95 section thickness 5 mm). The b factors used 0, 500, and 1,000 sec/mm (2). Apparent diffusion coefficient (ADC) maps digitally transferred to MRIcro (Chris Rorden, University Nottingham, Great Britain) evaluated...
PURPOSE: To optimize and determine the value of dual-phase contrast material–enhanced three-dimensional (3D) magnetic resonance (MR) angiography for preoperative evaluation blood supply to liver. MATERIALS AND METHODS: Dual phase 3D MR hepatic arteries portal vein was performed in 140 patients. In 80 patients, fat saturation, digital image subtraction, an anticholinergic agent, a high-caloric meal were evaluated. next 60 angiographic subtraction (DSA) quality diagnostic compared. RESULTS:...
PURPOSE: To prospectively evaluate the clinical feasibility of magnetic resonance (MR) imaging lungs with fast volumetric interpolated three-dimensional (3D) gradient-recalled-echo (GRE) sequences and to compare this examination standard computed tomography (CT) in patients lung abnormalities. MATERIALS AND METHODS: Twenty-five different abnormalities were examined 3D GRE MR imaging. The small pulmonary nodules seven, TNM stage large intrapulmonary tumors eight, benign bronchial disease five...
Abstract Purpose: To evaluate differences in apparent diffusion coefficient (ADC) values between head, body, and tail regions the impact of sets b‐values used weighted imaging (DWI) normal pancreas. Materials Methods: In 51 healthy volunteers echo‐planar DWI pancreas was prospectively performed with 50, 400, 800 s/mm 2 . All four possible combinations were to calculate ADC a total 587 regions. Dependency on anatomical applied calculated using multivariate analysis variance (ANOVA). Results:...
To determine the pancreatic iron (R2*) and fat content (FC) in comparison to hepatic cardiac R2* patients with overload disorders like β-thalassemia major (TM), Diamond-Blackfan anemia (DBA) or hereditary hemochromatosis.R2* rates were assessed liver, heart pancreas of 42 TM, 29 subjects other diseases, 10 controls using an ECG-gated breathhold sequence (12 echo time [TE] = 1.3-25.7 ms, readout repetition [TR] 244 ms). Pancreatic FC from TE dependent region interest based signal intensities...
Magnetic resonance (MR) sequences for cartilage visualization have been the target of numerous studies, and optimal sequence imaging remains a matter debate in literature.To compare MR findings with different detection lesions fresh deep-frozen human cadaveric patellae an vitro setting.Ten were imaged on 1.5T scanner 2x2 channel carotid sandwich coil conventional knee coil, compared orthopedic gold-standard histopathology. were: a) fat-saturated (FS) proton density-weighted (PDw) turbo...
Purpose: To retrospectively evaluate the impact of diffusion-weighted imaging (DWI) on detection prostate cancer in comparison with sextant biopsy. Materials and Methods: Fifty patients clinical suspicion underwent a combined endorectal-body-phased array magnetic resonance examination at 1.5 T (Siemens, Erlangen, Germany). The DWI was performed using b values 50, 400, 800 s/mm2. divided into sextants, including apex, middle aspect, base for left right sides, separately. Regions interest were...
Abstract Purpose: To investigate the healthy pancreas with diffusion‐weighted imaging (DWI) for characterization of age and gender‐related differences in apparent diffusion coefficient (ADC) values. Materials Methods: Sixty six volunteers were prospectively enrolled (33 male, 33 female; range 1.4 to 83.7 years age) echo‐planar DWI was performed. ADC values measured head, body, tail using a pixel‐by‐pixel approach. Effects gender on analyzed two‐factorial multivariate analysis variance...
To evaluate the efficacy of contrast material-enhanced magnetic resonance (MR) angiography for diagnosis peripheral arterial occlusion and follow-up after stent placement.Sixty-seven patients (21 women, 46 men; mean age, 64.6 years) were examined. Digital subtraction contrast-enhanced MR performed in 28 preinterventional evaluation iliofemoral 39 placement iliac or femoral arteries, which had been several months before.All 24 occlusions correctly diagnosed with angiography. Of 59 stenoses,...
<b>BACKGROUND AND PURPOSE:</b> Our aim was to compare different field strengths monitoring physiologic changes due oral stimulation of parotid glands by using diffusion-weighted (DW) echo-planar imaging (EPI). <b>MATERIALS METHODS:</b> Twenty-seven healthy volunteers were examined with a DW-EPI sequence at 1.5T and 3T before after commercially available lemon juice. The b factors used 0, 500, 1000 s/mm<sup>2</sup>. Apparent diffusion coefficient (ADC) maps evaluated manually placed region...
Ziel: Den Stellenwert der diffusionsgewichteten echoplanaren Bildgebung (DW-EPI) zur Quantifizierung funktionaler Veränderungen Glandula parotidea in Diagnostik des Morbus Sjögren zu bestimmen und evaluieren, ob mittels ADC-Messung eine Diagnosefindung im Frühstadium möglich ist. Material Methoden: Es wurden 52 gesunde Probanden 13 Patienten mit histologisch gesicherter Sjögren-Erkrankung einer DW-EPI Sequence (B-Faktoren: 0, 500 1000 s/mm2) bei 1,5 Tesla untersucht. Die Bildakquisition...
Objective: To evaluate the feasibility of a magnetic resonance imaging protocol for lung using volumetric interpolated 3D-gradient echo sequence (3D-GRE). Subjects and Methods: A T1-weighted 3D-GRE was used breath-hold examinations (“VIBE”) in twelve healthy volunteers (TR/TE 4.5/1.9 ms, flip-angle 12°, matrix 502 × 512 [interpolated]). Three coronal 80 mm slabs (16 partitions, 2.5 slices) were added to 3D data sets multi-planar reformations. No contrast material applied. Artifacts...
Ziel: Evaluation der diffusionsgewichteten echoplanaren MRT zur Messung unterschiedlicher Funktionszustände Glandula parotidea und Vergleich verschiedener Auswertemethoden. Material Methoden: Ohrspeicheldrüsen von 27 gesunden Probanden wurden mit einer MR-Sequenz (TR = 1.500 ms, TE 77 Sichtfenster („field-of-view”) 250 mm2, Pixelgröße 2,10 × 1,95 mm, Schichtdicke 5 mm) vor nach oraler Gabe eines kommerziell erhältlichen Zitronensaftes untersucht. Die benutzten b-Werte betrugen 0 sec/mm2, 500...
Ziel: Untersuchung zur Wertigkeit der MRT in Verlaufskontrolle bei Patienten mit d-TGA nach Switch-Operation. Material und Methoden: 14 konsekutive (Alter 4 bis 20 Jahre, Durchschnitt 13,5) arterieller Switch-Operation (ASO) Dextro-Transposition großen Gefäße (d-TGA) wurden unzureichendem echokardiographischen Schallfenster untersucht. 9 hatten eine ASO Pulmonalarterienbifurkation vor Aortenwurzel (Kollektiv 1), 5 lateral (2 links, 3 rechts) gelegener 2) erhalten. Die erfolgte 6...