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Biomedical subjects

W Dölken

Publications and source records attributed to W Dölken.

24 records · Page 2Linked to original sources
PubMed1989

[Digital image intensifier radiography and film-screen combinations in pulmonary nodules].

30 patients with known or suspected pulmonary nodules were examined using a digital image intensifier radiography system, a conventional radiography system and a tomography of the whole lung. 73.8% of the pulmonary nodules detected with tomography were also detected with the digital system, 69.1% with the conventional system. There was no significant difference between the two systems comparing false positive and false negative diagnoses. Regarding the dose reduction to nearly 25% of that of a conventional examination the digital technique should be preferred to the conventional technique, if pulmonary nodules are suspected.

Humans↗
PubMed1989

[Magnetic resonance tomography of children with surgically treated anal and rectal atresia].

MRI of the pelvis was performed in 17 children following surgical correction of anal and rectal atresias and in five children without ano-rectal malformations. A muscle score was used to characterize the muscles of the pelvic floor and their relationship to the rectum. There was close agreement between the MRI muscle score and clinical continence. MRI provided additional information that should improve continence following conservative and surgical treatment.

Adolescent↗
PubMed1988

[Color Doppler sonography: non-invasive potential for morphologic and functional vascular diagnosis].

A linear array colour Doppler sonographic method was used experimentally on a vessel phantom in order to determine flow velocity, and the results were compared with DSA. Both the Doppler and the DSA method showed very good agreement with true velocities (r greater than 0.97). The Doppler method underestimated flow velocity. Early clinical results indicate that colour Doppler sonography is able, at the same time, to demonstrate morphology and function (direction flow and flow velocity) of significant vascular abnormalities by a non-invasive method.

Blood Flow Velocity↗
PubMed1988

Calculation of flow velocities from the geometrical shape of contrast agent-induced time-density curves using DSA.

A method for the calculation of flow velocities in vessels is introduced. The method is validated by measurements with an artificial model. Measurements with the carrier fluids sodium chloride solution and human blood using various scattering objects, show good correlation (r greater than +0.9) of the calculated and volumetrically measured velocities. With a menu-oriented computer program, measurement of flow velocities on DSA series can be made following the routine clinical examination.

Angiography↗