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  • 11
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nuclear medicine 18 (1991), S. 293-294 
    ISSN: 1619-7089
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nuclear medicine 3 (1978), S. 71-80 
    ISSN: 1619-7089
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study was performed to comparatively assess the diagnostic accuracy of computerized tomography (CT) and nuclear liver-scanning in detecting and defining circumscript and diffuse liver diseases in 83 patients. Presence or absence of liver diseases was assessed based on the results of invasive diagnostic procedures such as biopsy, laparoscopy, laparotomy, and/or autopsy. The percentage of true negative diagnoses was 94% for CT and 91% for static gamma-imaging (n=33). With a rate of 94% true positive diagnoses, CT proved to be superior to gamma imaging with radiocolloids (81% true positives) in diagnosing circumscript liver diseases (n=31). In addition, CT was superior to nuclear imaging regarding discrimination of number and size of space-occupying lesions within the liver. In contrast to nuclear screening, CT scans were pathognomonic to some circumscript liver diseases such as cysts, metastates, and perhaps echinococciasis. This was also true for obstructive jaundice. Nuclear imaging, because it reflects a sort of liver function, was superior with cirrhosis, whereas CT showed only alterations in the size and shape of the liver and spleen.
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nuclear medicine 17 (1990), S. 38-41 
    ISSN: 1619-7089
    Keywords: Monoclonal antigranulocyte antibody ; NCA-95-specific antibody ; Bone marrow scintigraphy ; Antibody liver uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The influence of reconstituting a murine monoclonal IgG1 antibody kit with pertechnetate technetium 99m on antibody distribution in the liver, spleen and sternal bone marrow of patients was examined. The99mTc-labelled antibody used is directed against nonspecific cross-reacting antigen (NCA-95) and carcinoembryonic antigen (CEA) and has been successfully applied for imaging tissue inflammation and bone marrow scanning. Radioactivity uptake was determined in the liver, spleen, bone marrow and a precordial background region in a consecutive series of 25 patients, examined with an antibody preparation, routinely radiolabelled according to the manufacturer's recommendations and in 14 patients, in whom the antibody was reconstituted with special care, avoiding bubble formation and dropping of buffer into the antibody-containing vial. Gentle compared with routine antibody reconstitution caused a highly significant reduction of the antibody uptake in the liver, as determined by count densities, normalized to injected dose and acquisition time (13.2 ± 5.5 vs 20.1 ± 6.0 cpm per pixel, x±SID,P=0.008). The liver to background ratio was reduced from 3.4 ± 1.4 to 1.9 ±0.5 (P 〈 0.001). Spleen, sternal bone marrow and precordial background count rates were not significantly affected. These results clearly demonstrate that gentle antibody reconstitution can decrease non-specific antibody uptake in the liver by 34% ± 6.4% (x ± SEM). Thus, scan quality is improved, and the potential deleterious camouflage of underlying structures is avoided.
    Type of Medium: Electronic Resource
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  • 14
    ISSN: 1619-7089
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract After subtraction of the 201Tl background radioactivity which was obtained from the paracardiac region, left ventricular (LV)-201Tl net uptake at rest correlated with (1) the LV-muscle mass and therefore with (2) the LV-oxygen consumption. In normal LV, after maximum coronary dilation with dipyridamole, LV-201Tl net uptake increased little more than LV-oxygen consumption but by factor of 2.27 less than was coronary vascular reserve. In coronary heart disease (c.h.d.), dipyridamole caused a significantly smaller increase of LV-201Tl uptake (factor 1.16) than in normal LV myocardium (factor 1.76). This correlated well with the severity of the disease. Therefore, in maximum coronary dilation passive transport mechanisms may be responsible for augmented uptake and changed LV distribution of 201Tl which depends on the perfusion pattern. In exercise, the 201Tl-background radioactivity decreased from 54% (at rest) to 35% in normal patients and to 44% in c.h.d. Stressed thigh muscles accumulated 201Tl 4.72-fold more than at rest. Therefore, it is still questionable if the myocardium during exercise receives enough 201Tl to be labelled maximum. Since the LV-201Tl count rates in c.h.d., measured over the maximum uptake area were increased to the same amount as in normal myocardium neither in coronary dilation nor during exercise, the validity of using the maximum LV-201Tl uptake as a reference for the minimum one under these conditions is problematic.
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 107 (1988), S. 288-292 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In 28 patients with surgically proved loosening of hip-joint endoprostheses and 42 patients without loosening between 2 and 12 years after implantation and without clinical or radiological signs of loosening we performed clinical evaluation, and radiographs, a three-phase bone scan, and a 111indium-labeled leukocyte scan (ILLS). The sensitivity of radiographs in the group with loosening of hip-joint endoprostheses in the femoral as well as in the acetabular component was only about 50%, while the specificity was almost 100%. With a combination of radiographs and ILLS we reached a sensitivity in the acetabular component of 100% and in the femoral component of 88%, but specificities of only 57% in the acetabular component and 40% in the femoral component were found. We found that the ILLS is a very helpful method of examination to detect loosening of hip-joint arthroplasties in doubtful cases.
    Type of Medium: Electronic Resource
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  • 16
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Positronen-Emissions-Tomographie (PET) ; Neurologie ; Neurochirurgie ; Psychiatrie ; Key words Positron emission tomography ; Neurology ; Neurosurgery ; Psychiatry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary To date, positron emission tomography (PET) is the most powerful method for the in-vivo investigation of human brain metabolism. Besides extensive application of this technology in the neurosciences, PET is also being increasingly used as a clinical tool. However, despite its acceptance in clinical practice, a major obstacle is its high costs. The present article reviews the literature on the clinical use of PET in neurology, neurosurgery, and psychiatry in order to substantiate the clinical indications for PET in these specialties as established by an interdisciplinary conference.
    Notes: Zusammenfassung Die Positronen-Emissions-Tomographie (PET) ist das derzeit leistungsfähigste Verfahren zur In-vivo-Untersuchung des zerebralen Stoffwechsels. Neben einem breitgefächerten Einsatz von PET in der neuromedizinischen Forschung findet die PET zunehmend auch Eingang in die klinische Diagnostik. Dieser Entwicklung entgegen stehen die relativ hohen Kosten, die mit diesem Verfahren verbunden sind. Die vorliegende Arbeit begründet die, in einer interdisziplinären Konferenz erarbeiteten Konsensusindikationen für den klinischen Einsatz der PET in der Neurologie, Neurochirurgie und Psychiatrie durch Aufarbeitung der einschlägigen Literatur.
    Type of Medium: Electronic Resource
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  • 17
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 205 (1973), S. 345-348 
    ISSN: 1434-4726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 18
    ISSN: 1432-2102
    Keywords: Schlüsselwörter Pankreaskarzinom ; Chronische Pankreatitis ; Lymphknotenmetastasen ; Positronenemissionstomographie ; Fluordesoxyglukose ; Key words Pancreatic cancer ; Chronic pancreatitis ; Lymph node metastases ; Positron emission tomography ; Fluorodeoxyglucose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Although the detection of pancreatic carcinoma has been considerably improved by recently developed imaging procedures, differential diagnosis between cancer and benign tumor masses, as well as lymph node staging, is still difficult. In vivo evaluation of regional glucose metabolism by means of positron emission tomography (PET) and fluorine-18-labelled fluorodeoxyglucose (FDG) is a new approach utilizing metabolic instead of morphological tumor properties for diagnosis. Patients and methods: A total of 85 patients with suspected pancreatic carcinoma were investigated by FDG-PET prior to surgery. Static PET scans were evaluated visually as well as quantitatively, taking increased FDG uptake as a sign of malignancy. PET results were correlated with intraoperative findings and histopathology of surgical specimens. Results: Forty-seven out of 55 (85 %) malignant tumors and 23 out of 30 (77 %) benign lesions were correctly classified by PET. Lymph node metastases were present in 31 patients, 19 of them (61 %) positive in PET. In 7 our of 13 (54 %) patients with liver metastases, PET detected hypermetabolic lesions. False-negative findings were mainly due to disturbance of glucose metabolism in diabetic patients, while most false-positive results could be attributed to acute inflammatory lesions in chronic pancreatitis. Conclusions: Our results indicate that classification of pancreatic masses can be improved by use of FDG-PET, which might lead to a reduction of unnecessary laparotomies in patients with benign or incurable disease.
    Notes: Zusammenfassung Trotz methodischer Verbesserungen in der Diagnostik des Pankreaskarzinoms ist die Differentialdiagnose pankreatischer Raumforderungen bei bestehender chronischer Pankreatitis sowie der Nachweis etwaiger Lymphknotenmetastasen bislang nur unvollständig gelöst. Die Bestimmung des regionalen Glukosestoffwechsels mit Hilfe der Positronenemissionstomographie (PET) und Fluor-18-markierter Fluordesoxyglukose (FDG) stellt einen neuen diagnostischen Ansatz dar, der nicht auf dem Nachweis morphologischer sondern metabolischer Tumorcharakteristika beruht. Bei 85 Patienten mit vermutetem Pankreaskarzinom wurde präoperativ eine FDG-PET durchgeführt und der Befund mit der histopathologischen Aufarbeitung des Operationspräparats verglichen. Von 55 malignen Tumoren konnten 47 anhand ihres Hypermetabolismus korrekt klassifiziert werden (85 %), 23 von 30 benignen Tumoren (77 %) wiesen keine Stoffwechselsteigerung auf (richtig-negativ). In der Ausbreitungsdiagnostik zeigte PET in 19 von 31 Fällen (61 %) korrekt das Vorliegen regionaler Lymphknotenmetastasen, in 7 von 13 Fällen (54 %) eine Lebermetastasierung an. Falsch negative Befunde fanden sch bei Diabetikern (5 von 8 unentdeckten Primärtumoren) während falsch positive Ergebnisse mehrheitlich (4 von 7) auf akut entzündliche Veränderungen bei chronischer Pankreatitis zurückzuführen waren. Diese Ergebnisse belegen, daß durch die FDG-PET eine Verbesserung der Diagnostik unklarer pankreatischer Raumforderungen erreicht werden kann, die zu einer Reduktion unnötiger Laparatomien beitragen könnte.
    Type of Medium: Electronic Resource
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  • 19
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 372 (1987), S. 871-872 
    ISSN: 1435-2451
    Keywords: Gastrectomy ; Substitute stomach ; Motility disorders ; Patterns of bile flow ; Gastrektomie ; Ersatzmagenbildung ; Motilitätsstörungen ; Gallengangskinetik
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusamenfassung 24 Patienten wurden 6 Monate bis 5 J. nach Gastrektomie und 2 Formen der Ersatzmagenbildung (17x Longmire-Gütgemann [LG], 7x Y-Roux [Y-R] klinisch und szintigraphisch nachuntersucht. Die Ersatzmagenfunktion zeigte keine signifikanten Unterschiede zwischen beiden Gruppen. Bei der hepato-biliären Sequenzszintigraphie fand sich jedoch eine deutlich verzögerte Reizantwort der Gallenblase bei Aufhebung der Duodenalpassage. Die Auswurffraktion war mit 16,2±4,9% (Y-R) gegenüber 46,8±24,9% (LG) deutlich verringert. Die ausgeprägte Fettresorptionsstörung beim Y-Roux-Ersatzmagen ist demnach durch eine Störung der Synchronisation von Speisenpassage und Gallengangsentleerung bei Aufhebung der Duodenalpassage bedingt.
    Notes: Summary Twenty-four patients were investigated clinically and scintigraphically 6 months to 5 years after gastrectomy; two different types of substitute stomach had been used (17x Longmire-Gütgemann [LG]; 7x Y-Roux [Y-R]. There was no significant difference in the substitute stomach function between the two groups. On hepatobiliary scintigraphy, delayed beginning of gallbladder contraction was detected in the Y-R substitute stomachs. Bile output was significantly lower in Y-R 616. (16.2%±4.9%) than in LG substitute stomachs (46.8%±24.9%). These results suggest that the defect in fat absorption after performing an Y-R substitute stomach is caused by a synchronization failure between chyme transit and bile flow in patients without a duodenal passage.
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 361 (1983), S. 752-752 
    ISSN: 1435-2451
    Keywords: Duct occlusion ; Pancreatic allografting ; Gangocclusion ; Pankreastransplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bisher wurden 12 konsekutive segmentale Pankreastransplantationen bei 11 Patienten durchgeführt, wobei in allen Fällen die Gangocclusion mit Ethibloc angewandt wurde. 5 Pankreastransplantate funktionieren derzeit: 2 Jahre, 1 Jahr, 3 Monate, 2 Monate, 1,5 Monate. Bisher haben wir keinen Hinweis dafür (weder klinisch noch nuklear-medizinisch noch histologisch), daß ein Pankreastransplantat aufgrund einer sekundär induzierten Pankreasfibrose versagte. Wir sehen daher keinen Grund, die Technik der Gangocclusion mit Ethibloc bei der klinischen Pankreastransplantation im Augenblick zu verlassen.
    Notes: Summary Twelve consecutive segmental pancreatic allografts have been performed in 11 patients using the technique of duct obstruction with Ethibloc in all cases. Five pancreatic allografts are currently functioning (2 years, 1 year, 3 months, 2 months, 1.5 months). There is no evidence (neither by clinical observations, nor by scan or histological studies) that a pancreatic allograft failed due to secondary fibrosis. Thus, we will continue to use the technique of Ethibloc occlusion in clinical pancreatic transplantation.
    Type of Medium: Electronic Resource
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