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Biomedical subjects

R Oberson

Publications and source records attributed to R Oberson.

At least 19 recordsLinked to original sources
PubMed1991

Infected teratoma of lower posterior mediastinum in a six-year-old boy.

A six-year old boy presented with prolonged unexplained fever caused by an infected teratoma of the lower posterior mediastinum. Modern imaging, combining ultrasonography with computed tomography, enabled the correct diagnosis of topography, extension and nature of this rare lesion to be made and explained the clinical features. Follow-up CT showed regression of the abscess after antibiotics thus permitting elective surgery.

Child↗
PubMed1979

[The EMI-scanner CT 5005 for exploring all organs the eye and the orbit (author's transl)].

The EMI-scanner CT 5005 is well suited for exploring all the organs of the body, from top to toe. Its advantages, particularly in ophtalmology, are discussed: quality of imaging not only brain and other soft organs, but bones as well; precise analysis of the base of skull with the matrix 320X320; possibility of primary coronal section. The machine has proven very successful in the study of the orbits, their content and surroundings.

Eye Diseases↗
PubMed1979

[The computerized tomography in findings posttraumatic hematoma (author's transl)].

The authors report two cases of posttraumatic hematoma in the orbit. The first patient presents an unilateral amaurosis through indirect trauma of the optic nerve. The computerized tomography reveals a hematoma of the optic nerve sheath, confirmed by surgery. The second patient presents a posttraumatic limitation of the ocular motility and the computerized tomography reveals a hematoma of two extraocular muscles.

Adult↗
PubMed1978

CAT of the spine and spinal cord.

CAT for spine and spinal cord studies was carried out in 182 patients aged 7-80 years during 12 months (April 1977 to March 1978) with the EMI body scanner CT 5005. Three methods were used: (1) standard (noncontrast) scanning; (2) the same, with IV contrast enhancement; (3) the same again, after CSF enhancement with Amipaque (computer-assisted myelography). The combined use of Amipaque and CT seems particularly interesting.

Adolescent↗
PubMed1977

Cerebral coenurosis. Report of a case with arteritis.

A case of the unusual clinical condition of cerebral coenurosis, the unique parasitic disease that is localized only in the CNS, is reported. The patient had repeated attacks of transient hemiparesis due to intracranial arteritis which was demonstrated by several angiographic studies. The CSF showed a discreet lymphocytosis and increased immunoglobulins. This inflammatory reaction which preceeded the manifestations of the intracranial mass can be explained by the parasitic foreign bodies, the liberation of somatic and metabolic parasitic toxins and the immunological reaction of the organism. The arteritis of the basal intracranial vessels was probably secondary to the inflammatory reaction of the leptomeninges. In presence of the rare association of meningovascular disease and an expanding intracranial lesion a parasitic condition due to a larval stage of Cestodes (Hydatidosis, Cysticercosis, Coenurosis) should be always considered.

Adult↗
PubMed1977

[Radioisotope diagnosis of brain death].

In the light of 6 examples the authors emphasize the value and reliability of radionuclide angiography in determining the absence of cerebral perfusion, i.e., brain death.

Adolescent↗
PubMed1977

[Nuclear medicine diagnostic in hydrocephalus (author's transl)].

Some of the main questions about hydrocephalus, its origin and classification are reviewed. Routine radioisotope studies of the CSF pathways during 11 years has brought many valuable criteria for defining pathological cases. Attention is focused on the various states of balance between production and resorption of the CSF in hydrocephalus in order to find the right time for placing a shunting device. Radioisotope studies can provide clear images, patterns and criteria. In most instances hydrocephalus may be defined whether compensated or not. They also give a true representation of this unsteady dynamic state which constitute hydrocephalus. Dubious or intermediary cases still exist for which only dubious or intermediary cases still exist for which only dubious results are to be expected. The "pattern recognition" problem is emphasized while technical problems, so important they may be, are only summarized. Radioisotope studies still remain the most valuable and informative test for stuying the third circulation in men. The successive imaging of the various cisterns in different planes must be clinically interpreted, and may be repeated in dubious cases according to the clinical status.

Adult↗
PubMed1977

[Neuroradiology and the chiasmatic angle syndrom (author's transl)].

Many diagnostic procedures are available. The main methods are briefly reviewed. Standard X-rays of the skull are always needed. In doubtful cases polytomography is essential. Bone scintigraphy reveals early signs of changes in the bony macrostructures. Brain scintigraphy is still very useful in observing 1. the blood-flow in both intracranial and intraorbital regions, and 2. the cranio-orbital distribution of the radiotracer. Brain scintigraphy is particularly important in detecting meningiomas and vascular lesions. The dynamic study and the comprehensive survey it gives are still not replaced by computer tomography (CT) scanning, which however represents the most powerful advance in this field. The most suitable methods for exploring precise details of vascularisation and structural delineation remain the classical carotid and vertebral angiographies, the orbital and cavernous sinus phlebographies and also the cerebral pneumography. During the last years the accuracy of these methods has greatly increased through technological advance. In many cases they have become indispensable.

Cerebral Angiography↗
PubMed1976

Radioisotope choroid plexography. A preliminary report.

Radioisotope plexography seems as easy and innocuous as routine brain scanning. An introductory method is given which could be improved. The choroid plexuses of the four ventricles were well visualized in 15 patients. Consideration is given to the possible labeling process. Besides its morphological value, the test could give interesting clues in the dynamic study of hydrocephalus.

Cerebral Ventricles↗
PubMed1976

Perangiographic rupture of a right posterior communicating artery aneurysm.

Contrast material was seen to extravasate twice from a posterior communicating arterial aneurysm during injection of the internal carotid artery under local anesthesia. The patient made full recovery. The aneurysm was then successfully clipped. The authors review related reports. The increase in distal arterial pressure is thought to be the cause of the aneurysmal rupture.

Adult↗