226
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Juergens KU, Seifarth H, Wienbeck S, Range F, Wenker M, Wichter T, Heindel W, Fischbach R. Dual-Source CT gestützte Analyse der linksventrikulären Myokardfunktion: 3D-Schwellenwert-basierter Segmentations-Algorithmus im Vergleich zur Simpson-Methode. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-976856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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227
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Tschugunow AT, Wessling J, Juergens KU, Fischbach R, Heindel W. Bestimmung eines geeigneten Scandelays mit gewichtsadaptierter Kontrastmittelgabe für die Dual Source CT des Abdomens. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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228
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Schöning S, Engelien A, Kugel H, Schäfer S, Schiffbauer H, Zwitserlood P, Pletziger E, Beizai P, Kersting A, Ohrmann P, Greb RR, Lehmann W, Heindel W, Arolt V, Konrad C. Functional anatomy of visuo-spatial working memory during mental rotation is influenced by sex, menstrual cycle, and sex steroid hormones. Neuropsychologia 2007; 45:3203-14. [PMID: 17689571 DOI: 10.1016/j.neuropsychologia.2007.06.011] [Citation(s) in RCA: 156] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2007] [Revised: 06/15/2007] [Accepted: 06/24/2007] [Indexed: 11/22/2022]
Abstract
Recent observations indicate that sex and level of steroid hormones may influence cortical networks associated with specific cognitive functions, in particular visuo-spatial abilities. The present study probed the influence of sex, menstrual cycle, and sex steroid hormones on 3D mental rotation and brain function using 3-T fMRI. Twelve healthy women and 12 men were investigated. Menstrual cycle and hormone levels were assessed. The early follicular and midluteal phase of the menstrual cycle were chosen to examine short-term cyclical changes. Parietal and frontal areas were activated during mental rotation in both sexes. Significant differences between men and women were revealed in both phases of menstrual cycle. In men we observed a significant correlation of activation levels with testosterone levels in the left parietal lobe (BA 40). In women, a cycle-dependent correlation pattern was observed for testosterone: brain activation correlated with this male hormone only during the early follicular phase. In both cycle phases females' brain activation was significantly correlated with estradiol in frontal and parietal areas. Our study provides evidence that fMRI-related activity during performance of cognitive tasks varies across sex and phases of the menstrual cycle. The variation might be partly explained by better task performance in men, but our results indicate that further explanations like basic neuronal or neurovascular effects modulated by steroid hormones must be considered. Both estradiol and testosterone levels may influence fMRI signals of cognitive tasks, which should affect selection of subjects for future fMRI studies.
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229
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Girnus R, Sommer A, Czwoydzinski J, Lenzen H, Heindel W. Vergleich von Parenchymdosen unterschiedlicher digitaler Mammographiegeräte anhand von Daten aus dem bundesweiten Mammographie-Screening-Programm. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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230
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Czwoydzinski J, Sommer A, Weigel S, Lenzen H, Heindel W. Entwicklung eines Data-Warehouse-Systems zur Evaluation des Mammographie-Screening-Programms. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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231
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Stehling C, Vieth V, Langer M, Nassenstein I, Bachmann R, Heindel W. Hochauflösende MR-Bildgebung des TFCC und des Handgelenks bei Patienten: Vergleich der Bildqualität bei 1,5 und 3 Tesla. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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232
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Eisenblätter M, Wall A, Ehrchen J, Heindel W, Roth J, Bremer C. Fluoreszenz-basierte Visualisierung von Leukozyten-Migration in inflammatorische Granulome. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-976991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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233
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Kugel H, Ohrmann P, Rauch AV, Bauer J, Heindel W, Suslow T. Die Reaktion der Amygdala auf maskierte ängstliche Gesichter als Maß für „Threat sensitivity“ bestimmt die Geschwindigkeit der visuellen Suche nach emotionalen Gesichtsausdrücken. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-977156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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234
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Dannlowski U, Ohrmann P, Bauer J, Kugel H, Baune BT, Hohoff C, Kersting A, Arolt V, Heindel W, Deckert J, Suslow T. Serotonergic genes modulate amygdala activity in major depression. GENES BRAIN AND BEHAVIOR 2006; 6:672-6. [PMID: 17284168 DOI: 10.1111/j.1601-183x.2006.00297.x] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Serotonergic genes have been implicated in the pathogenesis of depression probably via their influence on neural activity during emotion processing. This study used an imaging genomics approach to investigate amygdala activity in major depression as a function of common functional polymorphisms in the serotonin transporter gene (5-HTTLPR) and the serotonin receptor 1A gene (5-HT(1A)-1019C/G). In 27 medicated patients with major depression, amygdala responses to happy, sad and angry faces were assessed using functional magnetic resonance imaging at 3 Tesla. Patients were genotyped for the 5-HT(1A)-1019C/G and the 5-HTTLPR polymorphism, including the newly described 5-HTT-rs25531 single nucleotide polymorphism. Risk allele carriers for either gene showed significantly increased bilateral amygdala activation in response to emotional stimuli, implicating an additive effect of both genotypes. Our data suggest that the genetic susceptibility for major depression might be transported via dysfunctional neural activity in brain regions critical for emotion processing.
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235
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Juergens K, Weckesser M, Stegger L, Franzius C, Beetz M, Schober O, Heindel W, Wormanns D. Tumor staging using whole-body high-resolution 16-channel PET-CT: does additional low-dose chest CT in inspiration improve the detection of solitary pulmonary nodules? Clin Imaging 2006. [DOI: 10.1016/j.clinimag.2006.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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236
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Beyer F, Heindel W, Hoffknecht P, Kuhnigk J, Dicken V, Lange T, Thomas M, Wormanns D. CT-basierte softwaregestützte Vorhersage der postoperativen Lungenfunktion nach Lungenteilresektion. ROFO-FORTSCHR RONTG 2006; 178:872-9. [PMID: 16953479 DOI: 10.1055/s-2006-926950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
PURPOSE The predicted postoperative forced exspiratory volume in one second (FEV (1)) is an important functional factor for predicting the operability of patients with bronchial carcinoma. A software tool that uses a preoperative chest MSCT and pulmonary function test (PFT) for largely automated prediction of the FEV (1) was evaluated. MATERIALS AND METHODS Fifteen patients with surgically treated lung cancer were examined with a preoperative chest MSCT (1.25 mm slice thickness, 0.8 mm reconstruction increment) and PFT before and after surgery. CT scans were analyzed by the prototype software MeVisPulmo (MeVis gGmbH, Bremen) that predicted the postoperative FEV (1) as a percentage of the preoperative values measured by PFT. The automated segmentation and volumetry of lung lobes were performed either without or with minimal user interaction. Patients underwent lobectomy in twelve cases (6 upper lobes, 1 middle lobe, 5 lower lobes) and pneumectomy in three cases. The predicted FEV (1) values were compared to the observed postoperative values as a standard of reference. The additional functional parameters "total lung capacity" (TLC) and "forced vital capacity" (FVC) were compared to the FEV (1) results. RESULTS Automated calculation of predicted postoperative lung function was successful in all cases. Due to an implausible PFT, two of the 15 patients were excluded from the collective. A mean postoperative FEV (1) value of 75 % (SD +/- 12 %) of the preoperative FEV (1) was calculated and 74 % (SD +/- 12 %) was actually measured. The deviations of the predicted value from the measured postoperative FEV (1) ranged between - 289 ml (-12 % of the measured postoperative FEV (1)) and + 294 ml (+ 15 % of the postoperative FEV (1)). The mean deviation (absolute value) was 137 +/- 77 ml/s. This corresponds to 7 +/- 3 % of the measured postoperative FEV (1). Bland-Altman-Statistics showed the 95 % "limits of agreement" for the predicted FEV (1) values to be between - 341 ml and + 301 ml, corresponding to - 17.5 % and + 15.8 of the measured postoperative FEV (1) value. Analysis of the TLC and FVC yielded similar results. CONCLUSION In the present pilot study the software-assisted prediction of the postoperative FEV (1) using a preoperative MSCT and pulmonary function test corresponded satisfactorily with the observed postoperative values. The introduced approach may make it possible to obtain additional information for the prediction of functional operability prior to performing lung cancer surgery.
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MESH Headings
- Adenocarcinoma/diagnosis
- Adenocarcinoma/pathology
- Adenocarcinoma/physiopathology
- Adenocarcinoma/surgery
- Aged
- Carcinoma, Small Cell/diagnosis
- Carcinoma, Small Cell/pathology
- Carcinoma, Small Cell/physiopathology
- Carcinoma, Small Cell/surgery
- Carcinoma, Squamous Cell/diagnosis
- Carcinoma, Squamous Cell/pathology
- Carcinoma, Squamous Cell/physiopathology
- Carcinoma, Squamous Cell/surgery
- Data Interpretation, Statistical
- Diagnosis, Computer-Assisted
- Female
- Forced Expiratory Volume
- Humans
- Lung/pathology
- Lung/physiology
- Lung/physiopathology
- Lung/surgery
- Lung Neoplasms/diagnosis
- Lung Neoplasms/pathology
- Lung Neoplasms/physiopathology
- Lung Neoplasms/surgery
- Male
- Middle Aged
- Neoplasm Staging
- Pilot Projects
- Pneumonectomy
- Predictive Value of Tests
- Radiography, Thoracic
- Tomography, Spiral Computed
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237
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Ozgun M, Hoffmeier A, Quante M, Fischbach R, Heindel W, Botnar R, Maintz D. [Whole-heart coronary MR angiography -- initial results]. ROFO-FORTSCHR RONTG 2006; 178:500-7. [PMID: 16612789 DOI: 10.1055/s-2006-926650] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
PURPOSE To evaluate a new coronary MR angiography technique covering the whole coronary artery tree in one data set acquisition. MATERIALS AND METHODS Six healthy volunteers and 15 patients with known CAD were examined with a navigator gated and corrected (NAV) free-breathing 3D steady-state free precession sequence covering the whole heart (WH-MRA) (TR = 5.4, TE = 2.7, SENSE factor = 2, 160 slices, 0.75 mm reconstructed slice thickness, in-plane resolution = 0.99 x 0.99 mm(2), scan time 14 min [50 % NAV efficiency]) and a vessel targeted 3D SSFP MRA sequence (t-MRA) (TR = 5.6 ms, TE = 2.8 ms, 20 slices of 1.5 mm reconstructed slice thickness, in-plane resolution = 0.99 x 0.99 mm(2), scan time = 7 min [50 % NAV efficiency]). Subjective image quality (4-point scale) and objective image quality parameters including vessel sharpness, vessel diameter and CNR were calculated for WH-MRA and t-MRA. In patients, the accuracy for detection of stenosis larger than 50 % was compared to the accuracy of X-ray coronary angiography (XA), which was considered the standard. RESULTS WH-MRA demonstrated good vessel visibility in healthy subjects (100 %) whereas vessel visibility in patients was limited (78 % in an 8 segment evaluation). Vessel sharpness was inferior to that of t-MRA in patients (37 vs. 42 %) but equal in healthy subjects (42 %). Vessel diameter did not differ significantly between WH-MRA and t-MRA. CNR was significantly reduced for WH-MRA (CNR 7.4 vs. 11.5). The diagnostic accuracy for the detection of CAD was comparable for both MRA approaches (85.5 vs. 86.2 %). CONCLUSION WH-MRA allows good coronary artery visualization in healthy subjects and patients and provides a simplified scanning procedure and advantages in 3D post-processing. Regarding image parameters and the detection of CAD, the results are comparable to those acquired with t-MRA. The major disadvantage remains the high number of diagnostically insufficient images.
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238
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Allkemper T, Heindel W, Kooijman H, Ebert W, Tombach B. CMR 2005: 2.01: High-field MRA with iron oxide blood-pool contrast agents: field strength effects on vascular contrast enhancement in rabbits at 1.5 and 3.0 T. CONTRAST MEDIA & MOLECULAR IMAGING 2006. [DOI: 10.1002/cmmi.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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239
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Domschke K, Ohrmann P, Braun M, Suslow T, Bauer J, Hohoff C, Kersting A, Engelien A, Arolt V, Heindel W, Kugel H, Deckert J. Amygdala and prefrontal cortex emotional processing in panic disorder influenced by catechol-O-methyltransferase val158met genotype. KLIN NEUROPHYSIOL 2006. [DOI: 10.1055/s-2006-939129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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240
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Juergens KU, Weckesser M, Stegger L, Franzius C, Beetz M, Schober O, Heindel W, Wormanns D. Tumor staging using whole-body high-resolution 16-channel PET-CT: does additional low-dose chest CT in inspiration improve the detection of solitary pulmonary nodules? Eur Radiol 2006; 16:1131-7. [PMID: 16450084 DOI: 10.1007/s00330-005-0080-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2005] [Revised: 10/15/2005] [Accepted: 10/28/2005] [Indexed: 11/30/2022]
Abstract
For optimal image fusion between CT and F-18-FDG-PET, the acquisition of CT images is performed in mild expiratory suspension, which might compromise the detection of lung metastases. This study aimed at evaluating the influence of expiration on the detection of solitary pulmonary nodules (SPN) and at assessing if additional inspiratory low-dose CT (I-LDCT) of the chest can improve the detection of potential lung metastases performing whole-body 16-channel PET-CT. Sixty-six patients with malignant tumors underwent PET-CT: contrast-enhanced CT was acquired during mild expiration and was used for fusion with PET images; additionally, chest I-LDCT was performed at deep inspiration. Two radiologists reported all SPN detected at I-LDCT and the expiratory CT scan independently. Overall, 53% of 128 SPN (mean: 3.8+/-0.2 mm) were detected at both respiratory states: 51 SPN only at I-LDCT, and 9 nodules only at expiratory CT. Of the SPN, 117/128 were classified as certain; 45 of those were additionally detected at I-LDCT, and 6 nodules at expiratory CT. A 100% detection rate was reached in SPN >4 mm at I-LDCT versus >8 mm at expiratory CT (all P<0.001). Additional I-LDCT of the chest significantly improves the detection of SPN at whole-body F-18-FDG-PET-CT and thus is recommended as part of the standard protocol for oncological patients.
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241
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Tombach B, Schneider J, Reimer P, Mahler M, Ebert W, Shamsi K, Heindel W. CMR 2005: 6.05: Phase I clinical trial of gadomer. CONTRAST MEDIA & MOLECULAR IMAGING 2006. [DOI: 10.1002/cmmi.38] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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242
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Beyer F, Zierott L, Fallenberg EM, Jürgens K, Stoeckel J, Heindel W, Wormanns D. Vergleich von Sensitivität und Befundungszeit bei Verwendung eines Systems zur computerunterstützen Detektion (CAD) von Lungenrundherden im MDCT als „concurrent reader“ oder R. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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243
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Persigehl T, Matuszewski L, Wall AW, Kessler T, Bieker R, Berdel W, Mesters R, Heindel W, Bremer C. Prognostische Wertigkeit der USPIO unterstützten MRT zur Abschätzung anti-angiogener Tumortherapie. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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244
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Weigel S, Nordhoff D, Welling B, Horst J, Krämer S, Tombach B, Heindel W. Familiärer Brustkrebs: Ergebnisse zur Früherkennung an einem humangenetisch definierten Risikokollektiv im Zentrum Münster nach der 2. Runde. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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245
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Jürgens KU, Oei ML, Weckesser M, Franzius C, Schober O, Heindel W, Wormanns D. Evaluation eines optimierten Kontrastmittel-gestützten CT-Protokolls für Ganzkörper-Untersuchungen onkologischer Patienten mittels 16-Zeilen PET-CT. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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246
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Fischer T, Kloska SP, Wessling J, Dittrich R, Fischbach R, Seidensticker P, Ringelstein EB, Nabavi DG, Heindel W. Vorteile der zerebralen Perfusions-CT mit hochkonzentriertem Kontrastmittel. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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247
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von Wallbrunn AW, Höltke C, Zühlsdorf M, Heindel W, Schäfers M, Bremer C. Fluoreszenz-Bildgebung der αvβ3-Expression mit planaren und tomographischen Methoden. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-941129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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248
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Buerke B, Niederstadt T, Gerss J, Heindel W, Tombach B. Sind hochauflösende CE-MRA bei 1,5 T und i.a.-DSA in der Detektion von Gefäßveränderungen der supraaortalen Gefäße wirklich gleichwertig? Retrospektive segmentweise Analyse mit „GEE-testing''. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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249
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Heindel W. Die digitale Technik als Basis für effizientes Mammographie-Screening. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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250
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Krämer C, Nassenstein I, Stehling C, Niederstadt T, Dittrich R, Heindel W, Bachmann R. MRT bei spontanen Dissektionen der Halsgefäße: Prospektive Sequenzanalyse zur diagnostischen Wertigkeit. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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