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Fuchs J, Engelmann C, Petersen T, Kahn T, Moche M. Senkung des Pfortaderdruckes durch proximale Milzarterienembolisation: erste Ergebnisse von Venenverschlussdruckmessungen. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Brandmaier P, Purz S, Kahn T, Stumpp P. Simultane Messung von ADC und SUV-Werten in Tumoren und Lymphknotenmetastasen bei Patientinnen mit Zervix-Karzinomen an einem simultanen PET-MRT System. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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53
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Stumpp P, Fleiter C, Purz S, Kahn T. Diagnostischer Mehrwert der simultanen Ga68-DOTATOC-PET/MRT bei Patienten mit neuroendokrinem Tumor im Vergleich zur PET/CT. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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54
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Otto J, Thörmer G, Garnov N, Moche M, Kahn T, Busse H. Variabilität von absoluten und normierten ADC-Werten beim Prostatakarzinom in Abhängigkeit vom Einsatz einer Endorektalspule sowie der zur Berechnung herangezogenen b-Werte. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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55
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Brandmaier P, Kahn T, Lobsien D. [Manifestation of epithelioid sarcoma of proximal type of the vulva]. ROFO-FORTSCHR RONTG 2012; 185:66-7. [PMID: 23108896 DOI: 10.1055/s-0032-1313127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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56
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Stumpp P, Gosch D, Kühn A, Sorge I, Weber D, Lehmkuhl L, Kahn T, Nagel HD. Performance of an automatic dose control system for CT: patient studies. ROFO-FORTSCHR RONTG 2012; 185:144-52. [PMID: 23108902 DOI: 10.1055/s-0032-1325441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
PURPOSE To study the effect of an automatic dose control (ADC) system with adequate noise characteristic on the individual perception of image noise and diagnostic acceptance compared to objectively measured image noise and the dose reductions achieved in a representative group of patients. MATERIALS AND METHODS In a retrospective study two matched cohorts of 20 patients each were identified: a manual cohort with exposure settings according to body size (small - regular - large) and an ADC cohort with exposure settings calculated by the ADC system (DoseRight 2.0™, Philips Healthcare). For each patient, 12 images from 6 defined anatomic levels from contrast-enhanced scans of chest and abdomen/pelvis were analyzed by 4 independent readers concerning image noise and diagnostic acceptance on a five-point Likert scale and evaluated for objectively measured image noise. Radiation exposure was calculated from recorded exposure data. RESULTS Use of the ADC system reduced the average effective dose for patients by 36 % in chest scans (3.2 vs. 4.9 mSv) and by 17 % in abdomen/pelvis scans (7.6 vs. 8.3 mSv). Average objective noise was slightly lower in the manual cohort (11.1 vs. 12.8 HU), correlating with a slightly better rating in subjective noise score (4.4 vs. 4.2). However, diagnostic acceptance was rated almost equal in both cohorts with excellent image quality (4.6 vs. 4.5). CONCLUSION Use of an ADC system with adequate noise characteristic leads to significant reductions in radiation exposure for patients while maintaining excellent image quality.
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Olgar T, Kahn T, Gosch D. Average Glandular Dose in Digital Mammography and Breast Tomosynthesis. ROFO-FORTSCHR RONTG 2012; 184:911-8. [DOI: 10.1055/s-0032-1312877] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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58
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Petersen TO, Kahn T, Reiss-Zimmermann M. [Simple and yet so difficult: common occurrence of fibrous dysplasia and myxomas - the Mazabraud syndrome]. ROFO-FORTSCHR RONTG 2012; 184:831-2. [PMID: 22618472 DOI: 10.1055/s-0032-1312778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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59
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Garnov N, Gründer W, Thörmer G, Trampel R, Turner R, Kahn T, Busse H. In-vivo-Bestimmung der Kollagenstruktur im Kniegelenkknorpel mittels 7-Tesla MRT und erste Ergebnisse zu deren Altersabhängigkeit. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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60
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Thörmer G, Otto J, Schröder C, Garnov N, Reiss-Zimmermann M, Horn LC, Do M, Stolzenburg JU, Moche M, Kahn T, Busse H. Wertigkeit der diffusionsgewichteten und spektroskopischen MR-Bildgebung für eine Vorhersage der Tumoraggressivität beim Prostatakarzinom. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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61
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Kühn AC, Olgar T, Kahn T, Gosch D. Strahlenexposition bei der digitalen Brusttomosynthese. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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62
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Gawlitza M, Horn LC, Einenkel J, Bornmann K, Kahn T, Borte G. MRT-Diagnostik gynäkologischer Tumoren in Korrelation zu Makropathologie und Histologie. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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63
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Kaiser I, Kahn T, Lobsien D. Differenzierung von infektiösen und nicht-infektiösen Flüssigkeitsansammlungen mittels diffusionsgewichteter Sequenzen bei 3 Tesla. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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64
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Dazinger F, Schreiber J, Kahn T. DTI (Diffusion Tensor Imaging) - ein Überblick. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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65
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Stumpp P, Fernau M, van Daal K, Gosch D, Nagel HD, Kahn T. Der Einfluss verschiedener Iterationslevel der vierten Generation iterativer Rekonstruktiontechnik auf das Bildrauschen von Computertomographischen Aufnahmen des Halses. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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66
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Stumpp P, van Daal K, Fernau M, Gosch D, Nagel HD, Kahn T. Vierte Generation der iterativen Rekonstruktionstechnik: Einfluss verschiedener Iterationslevel auf das Bildrauschen in CT-Untersuchungen des Thorax. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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67
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Kaiser I, Kahn T, Lobsien D. Diagnostik von abdominopelvinen Abszessen mittels diffusionsgewichteter Sequenzen im MRT - eine Übersicht. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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68
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Brandmaier P, Fürmetz J, Kahn T. Multidector-Polytrauma CT bei Verletzungen des Gastrointestinaltraktes - Fallbeispiele & Pitfalls. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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69
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Stumpp P, Fernau M, van Daal K, Gosch D, Nagel HD, Kahn T. Der Einfluss verschiedener Iterationslevel der vierten Generation iterativer Rekonstruktiontechnik auf das Bildrauschen von Computertomographischen Aufnahmen des Abdomen. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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70
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Kühn AC, Schramm F, Kaiser I, Kahn T. Digitale Tomosynthese der Brust in der klinischen Mammographie. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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71
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Schulze MK, Eichfeld U, Kahn T, Stumpp P. [CT-guided marking of pulmonary nodules with a special lung marking wire before video-assisted thoracoscopic surgery - review of 184 cases]. ROFO-FORTSCHR RONTG 2012; 184:535-41. [PMID: 22473507 DOI: 10.1055/s-0031-1299418] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
PURPOSE Minimally invasive techniques like video-assisted thoracoscopic surgery (VATS) are currently the method of choice for the resection of small pulmonary nodules, when they are located in the periphery of the lungs. To guarantee quick and safe intraoperative identification of the nodule, preoperative marking is necessary and sensible. We report about our experiences in 184 markings with a special lung marking wire, which is placed in or around the pulmonary nodule using CT guidance. MATERIALS AND METHODS In 184 patients (97 m, 87f, mean age: 58.1 ± 13.7 years) with pulmonary nodules, scheduled for resection with VATS, a special lung marking wire was placed preoperatively under CT guidance. We evaluated the technical success, safety, necessity of conversion to thoracotomy and histology in all patients. RESULTS The marking wire could be positioned successfully in 181 cases (98.4 %). There was one major complication (uncontrollable pneumothorax). Minor adverse events like small pneumothorax (53.3 %) or a perifocal bleeding (30.4 %) did not necessitate treatment. Complete resection of the marked nodule was successful in 98.4 % of the patients. Conversion to thoracotomy was necessary in 29 patients (15.9 %) due to bleeding, adhesions, malignancy or wire dislocation. Histology revealed a benign nodule in 96 cases (54.4 %) and a malignant lesion in 78 cases (45.6 %), of which only 21 nodules (11.5 %) turned out to present a primary pulmonary carcinoma. CONCLUSION CT-guided marking of pulmonary nodules using a special marking wire followed by thoracoscopic resection is an efficient and safe method for diagnosing suspicious nodules in the periphery of the lung.
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Thörmer G, Moche M, Garnov N, Haase J, Kahn T, Busse H. Experimentelle Evaluierung eines Verfahrens zur kontinuierlichen 3D-Lokalisation intravaskulärer Katheter in einem Gefäßphantom. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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73
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Bertram H, Kühl U, Noutsias M, Kahn T, Hamm B, Gutberlet M. MRT-Untersuchungen ventrikulärer Wandbewegungsstörungen zur Beurteilung der Funktionsfähigkeit des Myokards bei Patienten mit chronischer Myokarditis. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0031-1300880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Reiss-Zimmermann M, Schulz T, Kahn T, Hofer M. Imaging of the sinuses for functional sinus surgery using navigational guidance. Laryngorhinootologie 2011; 91:160-6. [PMID: 22189857 DOI: 10.1055/s-0031-1291244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Advances in the understanding of mucociliary activity and pathophysiology of the nasal cavity and paranasal sinuses have revolutionized the surgical management of chronic and recurrent sinusitis. The development of functional endoscopic sinus surgery (FESS) can also be seen as the pioneer task in endoscopic surgery. Today, in more than 50% of all sinus surgeries FESS is being used. Inflammatory causes are the most common indication for surgery, which can be evaluated best preoperatively using (multi-detector) computed tomography. Even today there are further relevant developments of FESS that result in alleviation of the surgeon due to different degrees of automation. Using a preoperatively acquired navigational dataset helps choosing the optimal surgical strategy. Intraoperatively the navigational dataset is at present mainly used for localization of surgical tools. These newer operation methods demand for high-quality radiological imaging and evaluation, consisting of delineation of the local (inflammatory) process, detection of disease related complications and description of anatomical variations that may be important to the surgeon. Since patients with chronic recurrent sinusitis are relatively young on average and recurrent disease or further CT examinations are not uncommon, there should always be a focus on reduction of radiation exposure as much as possible. Technical advances like cone-beam tomography seem promising to further improve dose reduction as well as spatial resolution.
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Andreuccetti G, Carvalho HB, Cherpitel CJ, Yu Y, Ponce JC, Kahn T, Leyton V. Reducing the legal blood alcohol concentration limit for driving in developing countries: a time for change? Results and implications derived from a time-series analysis (2001-10) conducted in Brazil. Addiction 2011; 106:2124-31. [PMID: 21631625 PMCID: PMC3184361 DOI: 10.1111/j.1360-0443.2011.03521.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS In Brazil, a new law introduced in 2008 has lowered the blood alcohol concentration limit for drivers from 0.06 to 0.02, but the effectiveness in reducing traffic accidents remains uncertain. This study evaluated the effects of this enactment on road traffic injuries and fatalities. DESIGN Time-series analysis using autoregressive integrated moving average (ARIMA) modelling. SETTING State and capital of São Paulo, Brazil. PARTICIPANTS A total of 1,471,087 non-fatal and 51,561 fatal road traffic accident cases in both regions. MEASUREMENTS Monthly rates of traffic injuries and fatalities per 100,000 inhabitants from January 2001 to June 2010. FINDINGS The new traffic law was responsible for significant reductions in traffic injury and fatality rates in both localities (P<0.05). A stronger effect was observed for traffic fatality (-7.2 and -16.0% in the average monthly rate in the State and capital, respectively) compared to traffic injury rates (-1.8 and -2.3% in the State and capital, respectively). CONCLUSIONS Lowering the blood alcohol concentration limit in Brazil had a greater impact on traffic fatalities than injuries, with a higher effect in the capital, where presumably the police enforcement was enhanced.
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