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  • 1
    Electronic Resource
    Electronic Resource
    MRI manifestations of gastrointestinal lymphoma (1994)
    Springer
    Abdominal imaging 19 (1994), S. 495-500 
    Details
    ISSN: 1432-0509
    Keywords: MR studies, gastrointestinal tract ; Lymphoma, MR studies ; Intestines, MR studies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The magnetic resonance (MR) images of 11 cases of gastrointestinal lymphoma are presented. The findings include irregularly thickened mucosal folds, irregular submucosal infiltration, annular constricting lesion, exophytic tumor growth, mesenteric masses, and mesenteric/retroperitoneal lymphadenopathy. The tumors were homogeneous and intermediate in signal intensity on T1-weighted images. Heterogeneously increased signal intensities were noted on T2-weighted images. There was mild to moderate enhancement after intravenous administration of gadolinium dimeglumine (Gd-DTPA). The submucosal tumor infiltration might be outlined between the strongly GD-DTPA-enhanced mucosa and the low-intensity muscular layer. In one case that received tumor resection, the pathological examination showed destruction of most parts of the muscular layer, and the MR images did not disclose the low intensity muscular zone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00198248
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    MRI Manifestations of gastrointestinal wall thickening (1994)
    Springer
    Abdominal imaging 19 (1994), S. 389-394 
    Details
    ISSN: 1432-0509
    Keywords: MR imaging, astrointestinal tract, intestine ; Wall thickening
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The appearance of gastrointestinal wall thickening of various entities is demonstrated on magnetic resonance imaging (MRI). The entities include benign gastric ulcer, gastric carcinoma, pancreatic carcinoma with direct invasion of stomach, duodenal leiomyoma, radiation enteritis, peritonitis, colonic carcinoma, recurrent carcinoma at the gastrojejunal anastomosis with direct extension to the transverse colon, colocolic intussusception, sigmoid diverticulitis with pericolonic abscess and fistula into the urinary bladder, and lymphoma of the stomach, duodenum, small bowel, and colon. Air was introduced antegradedly or retrogradedly into the alimentary tract to act as a contrast agent. When the bowel was distended by air, the normal bowel wall was barely visible or even invisible. Abnormal focal or segmental wall thickening was outlined between the intraluminal air and extraluminal fat. In some instances, the thickenings were better demonstrated on coronal or sagittal sections. The proper muscular layer of the bowel has a low-signal intensity and was delineated between the thickened mucosa—submucosa and extramural fat. Interruption of this low-intensity zone might represent tumor invasion through the muscular layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00206921
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Abdominal pseudotumors and simulated lymphadenopathy in MRI: Differential features with the use of retrograde air insufflation (1994)
    Springer
    Abdominal imaging 19 (1994), S. 503-506 
    Details
    ISSN: 1432-0509
    Keywords: MR studies, gastrointestinal tract-MR studies, contrast medium ; Abdomen, MR studies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In order to evaluate the contribution of retrograde air insufflation in decreasing the occurrence of pseudotumor appearance and mimicked lymphadenopathy due to nonair-distended bowel loops, we retrospectively compared two groups of magnetic resonance (MR) examinations. In the group receiving retrograde air insufflation, 10.8% (67 of 619) of images showed a tumor-like lesion due to nonair-distended bowel loop(s), whereas in the group not receiving air introduction, a tumor-like lesion was simulated in 45.6% (140 of 307) of images. Furthermore, a collapsed bowel loop(s) mimicking an enlarged lymph node close to the aorta, inferior vena cava, or bilateral iliac vessels was found in 9.5% (24 of 252) of images of the latter group, in contrast to only 1.8% (9 of 505) of images of the former group. This study shows that retrograde air insufflation greatly reduces the occurrence of pseudotumor appearance and false impression of paraaortic, paracaval, or parailiac lymphadenopathy secondary to nonair-distended bowel loop(s).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00198250
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Improved impact-echo technique by signal processing (1990)
    Springer
    Research in nondestructive evaluation 2 (1990), S. 45-56 
    Details
    ISSN: 1432-2110
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An experimental study was performed to modify the conventional impact-echo technique to detect small diameter spherical voids in concrete. High velocity impact of steel balls was used to generate the high frequency waves in concrete necessary for detection of small voids. Elastodynamic wave propagation in concrete, type of impact source, and the size of the flaw that can be detected were studied. These laboratory studies were carried out on a 4 in. (10.2 cm) thick 4 ft. × 4 ft. (1.22 m × 1.22 m) concrete slab that contained a variety of artificial spherical flaws embedded at known locations. Analysis of the frequency spectrum of the response of the slab was used to determine the slab's thickness and presence of voids. Signal processing techniques were applied for a better interpretation of the slab's response. Autocorrelation and cross-correlation algorithms were used to determine the characteristics of the slab at different locations. The problems associated with determination of flaws and voids in concrete have been delineated. Some practical and easy to implement solutions have been proposed and ways of using the impact-echo technique more efficiently for field applications have been discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01606378
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    RFLP-based genetic map of rye (Secale cereale L.) chromosome 1R (1991)
    Springer
    Theoretical and applied genetics 82 (1991), S. 174-178 
    Details
    ISSN: 1432-2242
    Keywords: Rye ; Genetic mapping ; RFLP ; Storage protein ; Isozyme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A map of chromosome 1R of rye was constructed using 16 molecular and biochemical loci. From long arm to short arm, known-function loci were placed in the order: XAdh — XLee — Glu-R1[Sec-3] — XPpdk-1R — XEm-1R-1 — XEm-1R-2 — Centromere — XNor-R1 —Gpi-R1 — XGli-R1 [Sec-1a] along with six anonymous genomic and cDNA clones from wheat. The map, which spans 106 cM with 12 loci clustered in a 15-cM region around the centromere, shows reasonably good agreement with previously published maps for the centromeric region, whereas the XNor-R1 — Gpi-R1 region gives a much larger distance than previously reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00226209
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Comparative RFLP-based genetic maps of barley chromosome 5 (1H) and rye chromosome 1R (1992)
    Springer
    Theoretical and applied genetics 84 (1992), S. 339-344 
    Details
    ISSN: 1432-2242
    Keywords: Barley ; Genetic mapping ; RFLP ; Storage proteins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A genetic map of barley chromosome 5 (1H) was constructed using DNA markers. Seventeen loci were mapped to 15 locations, and these included the known-function loci (in order from the most distal on the long arm) XAdh (alcohol dehydrogenase), XLec (homologous to wheat germ agglutinin), XHor3 (D-hordein), XPpdk (pyruvate orthophosphate dikinase), centromere, XIcal (chymotrypsin inhibitor), and 6 loci in the B- and C-hordein cluster towards the end of the short arm. The gene order on the barley map agreed closely with that of chromosome 1 of rye. Intervarietal comparisons showed that single-copy cDNA and genomic DNA probes revealed about twice the level of RFLPs found in wheat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229492
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    Paper (German National Licenses)
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