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  • Breast neoplasms  (1)
  • Colorectal cancer  (1)
  • Computertomographie  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Magnification survey and spot view mammography with a new microfocus X-ray unit: detail resolution and radiation exposure (1998)
    Springer
    European radiology 8 (1998), S. 386-390 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Breast radiography ; Technology ; Breast neoplasms ; calcification ; Radiation dose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The aim of our study was to evaluate a mammography unit capable of magnification of up to fourfold at an equivalent or lower dose than with current systems. A prototype mammography tube with an electron-beam-focusing technology resulting in a focal spot size of 40–120 μm was combined with a highly intensifying screen-film system. To evaluate contrast-detail resolution, phantom radiographs were performed with the prototype magnification mammography system using a magnification factor of 1.7 for survey views and a magnification factor of 4.0 for spot views. They were compared with unmagnified survey views and magnification spot views (magnification factor 1.9) of a state-of-the-art mammography system. The radiation exposure was measured and mean glandular doses were calculated. The contrast-detail resolution with both prototype (m = 1.7) and conventional (m = 1.1) survey views was equivalent while the entrance dose and the mean glandular dose were approximately 50 % lower with the prototype. For spot views, the contrast-detail resolution was substantially higher for the prototype than for conventional magnification while the dose was equivalent. Dose reduction and improved detail resolution are possible with this new technology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050399
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    219. Das Lokalrezidiv nach Radikaloperation colorectaler Carcinome (1983)
    Springer
    Langenbeck's archives of surgery 361 (1983), S. 749-749 
    Details
    ISSN: 1435-2451
    Keywords: Colorectal cancer ; Local recurrence ; Computed tomography ; Colorectales Carcinom ; Lokalrezidiv ; Computertomographie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Das Lokalrezidiv nach Kontinenzresektion colorectaler Carcinome entsteht gewöhnlich extraluminal. Es kann daher in seiner Frühform der Endoskopie entgehen. Mit Hilfe der CT ist der pericolische Tumoranteil zu bestimmen und die Resektionsfähigkeit abzuschätzen. Das Lokalrezidiv nach abdominoperinealer Rectumamputation wird durch engmaschige Kontrollen von Klinik und CEA-Titer verdächtigt. Es läßt sich am ehesten durch die CT objektivieren.
    Notes: Summary Local recurrence after anterior resection of the colon and rectum due to carcinoma normally develops extramurally. Thus, in its early stage it can be overlooked by endoscopy. By means of CT, however, the pericolic part of the tumor can be determined and the resectability can be estimated. Local recurrence after abdominoperineal resection is primarily suspected by frequent clinical controls and serum CEA levels. It can be best objectified by CT.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01276044
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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