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Biomedical subjects

R Correll

Publications and source records attributed to R Correll.

14 recordsLinked to original sources
PubMed2000

Grazing collisions of black holes via the excision of singularities.

We present the first simulations of non-head-on (grazing) collisions of binary black holes in which the singularities are excised from the simulation. Initially equal mass m black holes (spinning or not) are separated by approximately 10m and with impact parameter approximately 2m. Evolutions to t approximately 35m are obtained where two separate horizons are present for t approximately 3.8m; then a single enveloping horizon forms indicating that the holes merged. Apparent horizon area estimates suggest gravitational radiation of about 2%-3% of the total mass. The evolutions end after a moderate amount of time because of instabilities.

Journal Article↗
PubMed1976

[Protection of gonads in radiography of the pelvis (author's transl)].

The effectiveness of a new device for the protection of gonads has been tested by measuring doses on the water-phantom and on patients. The lead protector is applied below the light-soorce and protects the gonads in pelvic radiography. The reduction of dosage corresponds to the usual lead-protectors. It should be particularly useful in Orthopedics, since it is simple and hygienic.

Female↗
PubMed1975

[Partial thoracic renal ectopy (author's transl)].

Based on a case of his own the author surveys the literature of this rare condition. He discusses its clinical importance, the differential diagnosis from a lung shadow placed on the diaphragm and the distinction between congenital and posttraumatic displacement. An IVP will settle the diagnosis. Unless there are symptoms, operative correction is not needed.

Diagnosis, Differential↗