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R Wolfram-Gabel

Publications and source records attributed to R Wolfram-Gabel.

At least 37 records · Page 2Linked to original sources
PubMed1995

Subungual glomus tumors: evaluation with MR imaging.

PURPOSE: To determine the magnetic resonance (MR) imaging features of subungual glomus tumors. MATERIALS AND METHODS: Thirty-one patients with a clinical suspicion of glomus tumor and 10 control subjects underwent MR imaging at 1.5 T. MR images of normal glomus bodies of a cadaver finger were correlated with histologic slices. With a local surface gradient coil, the pixel size reached 117 microns in one direction. Relaxation times were measured. Gadoterate meglumine was injected in 19 patients. RESULTS: Normal glomus bodies were visualized in the reticular dermis of the nail bed. Twenty-seven of 28 pathologically confirmed glomus tumors were detected with MR imaging. A peripheral capsule was present in most tumors. The nail matrix was compressed in 13 cases. The authors were able to differentiate three subtypes of glomus tumors (vascular, solid, and myxoid) on the basis of relaxation times and enhancement characteristics. Four patients had mucoid cysts or angioma in the nail bed. CONCLUSION: MR imaging can help accurately define the location and limits of glomus tumors before excision.

Adult↗
PubMed1995

[Arterial vascularization of the lenticular nucleus].

The arterial vasculature of the lenticular nucleus was studied on 30 human brains the vascular system of which was injected with Indian ink mixed with gelose. The arteries of the lenticular nucleus belong to the group of anterior central arteries issued from the internal carotid artery and its terminal branches, except for the posterior cerebral artery. Examination of serial sections made translucent by the Spalteholtz method enabled us to follow the courses of these vessels within the lenticular nucleus. In this nucleus two vascular networks were present, with different vascular organization and density. These differences were due to the histological structure and specific embryonic origin of each part of the lenticular nucleus.

Adult↗
PubMed1995

[Posterior epidural adipose tissue and the narrow lumbar canal: replacement tissue or cause of impingement?].

The role played by the epidural fat has been reported in lipomatosis induced by exogenous glucocorticoids and in severe obesity with lipomatosis. The role played by the "normal" posterior epidural fat (PEF) in lumbar canal stenosis (LCS) is less well known. The purpose of this study was to determine the part taken by PEF in LCS patients without endocrine disease, corticosteroid therapy or obesity. For this, we tried to specify the amount and distribution of PEF among the soft tissues in the vertebral canal, to demonstrate the involvement of PEF in dural sac compression, to describe the radiological features observed in cases of LCS and to look for associated morphological factors. The records of 30 LCS patients without exogenous or endogenous lipomatosis and in whom the essential pathogenic factor in 40 levels was PEF were reviewed retrospectively. At disc level, PEF was evaluated in the lower part of the mobile segment by means of CT or MRI axial sections cut through one or two spaces between L2-L3 and L4-L5. Measurements were made in 25 men (80%) and 6 women (20%) aged from 33 to 83 years (mean: 58 years). Most patients were suffering from lumbar pain, radiculopathy and/or neurogenic intermittent claudication. The data measured were: antero-posterior (AP) diameter of the dural sac, AP diameter of the bony lumbar canal (BLC), interligamentous distance (ILD) opposite the articular facets, and surface of PEF. The soft elements present on the midline--anterior epidural space (AES) and posterior epidural (PEF)--were expressed as percentage of the AP diameter of the bony lumbar canal.(ABSTRACT TRUNCATED AT 250 WORDS)

Adipose Tissue↗
PubMed1995

[Imaging of connective tissue formations of the sub-umbilical anterior abdominal wall].

New high resolution imaging modalities (CT and MRI) can distinguish between bladder and anterior abdominal wall pelvic connective tissue. The main structure is the umbilicovesical fascia located anterior to the peritoneum and posterior to the transversalis fascia. This layer divides the space between an anterior prevesical space and a posterior perivesical space. An understanding of these spaces facilitates the clinical identification and topography of pelvic the fluid collections.

Abdominal Muscles↗
PubMed1994

Vascular networks of the nucleus lentiformis.

The nucleus lentiformis vascular networks were studied in 30 brains by injecting the vascular system with gelatinous Indian ink. The nucleus lentiformis is divided into a medial part, the globus pallidus, and a lateral part, the putamen. These two parts differ completely from one another in their embryology, structure and functions. For these reasons, each part presents a specific vascular network. The putaminal network is dense and shows many similarities with the cerebral cortex vascular network; the pallidal one is simpler and less dense. These two vascular networks are located close to each other without overlapping. Their specificity may be in relation with the histological structure, with the morphogenetic evolution or with the functional activity of both nuclei to which they provide the vascularization.

Adult↗
PubMed1993

Pedicles of lumbar vertebrae.

The present review includes a thorough morphological study of the pedicles of lumbar vertebrae. After a detailed description of the pedicles, their dimensions (transverse and vertical diameters, pediculo-corporeal length), their orientation and structure are studied. These different factors allow a better understanding of new orthopedic surgical techniques of the lumbar spine.

Humans↗
PubMed1992

The venous vascularization of the corpus callosum in man.

The vascularization of the corpus callosum in Man is studied in 20 brains. Their vascular system is injected with Indian ink and gelatin. The corpus callosum is drained by callosal veins and callosocingulate veins towards the deep venous system of the brain. Most of these veins run downwards and join together at the central level of the corpus callosum. They then form the subependymal veins, which form the septal veins and the medial atrial vein. All these vessels are tributaries of the internal cerebral veins.

Adult↗
PubMed1992

High resolution MRI of the normal finger at 0.1 T: anatomic correlations.

MR images of the fingers are obtained in a 128 x 128 or 256 x 256 matrix format using a prototype of a mini imager dedicated to the hand. The vertical field of 0.1 T is provided by an electro-magnet with an air gap of 15 cm equipped with a single solenoidal coil. No Faraday cage is used. The maximum in plane pixel resolution of 100 mu is obtained for a field of view of 2.5 cm with a slice thickness of 2 mm. The identification of fine structures of the finger is demonstrated by the anatomical and histological correlations. This type of imager which is adapted to very limited field of views demonstrate that high resolution MRI of limb extremities can be achieved at 0.1 T.

Fingers↗
PubMed1991

[Vascularization of the corpus callosum in humans].

The blood supply of the corpus callosum is studied in 20 brains by injecting the vascular system with gelatinous Indian ink. The arterial vascularization derives mainly from the anterior cerebral arteries, accessed from the median artery of the corpus callosum or from the terminal and choroidal branches of the posterior cerebral arteries. The various arteries give off perforating branches which are direct or indirect, short, of middle length or long. All these arteries concentrate on the peripheral wall of the corpus callosum. Inside of it these various arteries give off numerous terminal and collateral branches running between the nervous fibres and forming a characteristic vascular network which nourishes the capillary network. The venous vascularization of the corpus callosum is tributary to the deep venous system of the brain and concentrates on the central wall of the commissure.

Arterioles↗
PubMed1989

[Arterial vascularization of the corpus callosum in man].

The blood supply of the corpus callosum in Man is studied in 20 brains by injecting the vascular system with gelatinous indian ink. The arterial vascularization of the corpus callosum is derived, although in an unequal way, from both of the arterial systems of the brain: the carotid system and the vertebral-basilar system. The carotid system contributes mainly to this supply by the anterior cerebral artery which is the main artery of the corpus callosum. It accessorily contributes to it by the anterior communicating artery which gives off an inconstant artery called median artery of the corpus callosum. The vertebral-basilar system contributes to the blood supply of the corpus callosum by the terminal branches and by choroidal branches of the posterior cerebral artery. These various arteries give off perforating arteries which are direct or indirect, short, of middle length or long. Inside the corpus callosum, these various arteries give off numerous terminal and collateral branches which run between the nervous fibers. They anastomose with homologous neighbouring branches to form a characteristic vascular network. The arrangement of this network is in close connection with the disposition and the orientation of the commisural fibers which form the different parts of the corpus callosum.

Adult↗
PubMed1987

Anatomy and computed tomography of the normal lumbosacral plexus.

The main nerves of the pelvis and lower limbs arise from the lumbar and sacral plexuses. These nerves can be affected by any of a large number of pathologic processes that occur in the paravertebral and pelvic regions. Understanding of the neurological findings related to paravertebral and pelvic pathology needs complete and accurate knowledge of the anatomy of these regions. The axial transverse sections of computed tomography give perfect visualisation of the anatomy of osseous, muscular, and vascular structures of the vertebral and paravertebral area and pelvic walls. Visualisation of the nerves in this regions is much more difficult, because direct demonstration of nervous structures by computed tomography is usually impossible. To be able to identify components of the lumbosacral plexus on axial CT sections the radiologist has to know the location of the nervous structures and the relationships of these structures to vascular, muscular and osseous structures which are easily demonstrated.

Humans↗
PubMed1987

[The vascularization of the human tela choroidea of the lateral ventricle].

The human tela choroidea of the lateral ventricle is vascularized by arteries arising from the two systems which form the arterial circle of the base, i.e. the internal carotid system and the vertebral basilar system. This blood supply is given by one anterior choroidal artery and by several posterior choroidal arteries. These arteries anastomose to form multiple indirect and remote links between the carotid and vertebral basilar systems. The capillary networks of the tela choroidea of the lateral ventricle consists of a velar network and of a choroidal network. This duality is constantly observed in the choroid formations of the human brain. The venous vascularization of the tela is tributary of the venous circle of the base of the brain through choroidal veins that drain either into the internal cerebral veins or into the basal veins.

Adult↗
PubMed1986

[Vascularization of the tela choroidea of the prosencephalon of the sheep (Ovis aries)].

The tela choroidea of the prosencephalon in sheep is vascularized by an anterior choroidal artery arising from the rostral branch of the carotid cerebral artery and by a posterior choroidal artery, arising from the caudal cerebral artery, branch of the carotidobasilar system. These two choroidal arteries give off choroidal branches which nourish the capillary networks of the tela. The latter consist of a velar capillary network and of a choroidal capillary network. Together, they drain into choroidal veinules and veins which are tributary of the superficial and of the deep venous systems of the brain.

Animals↗
PubMed1986

[Systematization of the angioarchitectonics of the colon in adult man].

The systematization of the angioarchitecture of the human colon was studied in 25 colons, the vascular system of which was injected with gelatinous indian ink. The arterial vascularization of the colonic wall is organized in two morphologically very different types of networks. The first type forms the distributional networks which consist of the subserosal, intermuscular and submucosal networks distributing harmoniously the blood running from the straight arteries. The second type forms the functional networks which consist of the muscular and mucosal networks related to the supply of the essential structure of the colonic wall. These consist essentially of pre- and postcapillary vessels. The venous vascularization of the colonic wall is organized according to a similar pattern. It also consists of three venous networks: the submucosal, intermuscular and subserosal networks which are tributaries of the straight veins and which receive the mucosal and muscular veins.

Adult↗
PubMed1985

[Vascularization of the tela choroidea of the prosencephalon in the cat (Felis domestica)].

The tela choroidea of the prosencephalon in cat is vascularized by an anterior choroidal artery arising from the carotid system and by a posterior choroidal artery arising from the vertebral basilar system. The first essentially supplies the tela and the choroid plexus of the lateral ventricle. The second above all supplies the tela choroidea of the third ventricle. Both, the anterior and posterior choroidal arteries anastomose with their terminal branches. The choroidal branches which arise from these arteries nourish the capillary networks of the tela. These vessels drain into venules and veins which are tributary of the venous circle of the base and of the internal cerebral veins.

Animals↗
PubMed1984

[Vascularization of the tela choroidea of the 3rd ventricle in man].

The human choroïd tela of the third ventricle is essentially vascularized by the medial posterior choroïdal arteries, which are collatered branches of the posterior cerebral arteries. In some cases, the tela is also supplied by superior posterior choroïdal arteries which are branches of the pericallosal artery. These different arteries give off short and long choroïdal branches which supply the velate and choroïd capillary networks. The latter drain into the two internal cerebral veins by short and long choroïdal veins.

Adult↗
PubMed1984

[The vascular networks of the muscular layers of the human colon].

The vascular networks of the muscular layer of the human colon were studied in 25 cases by injecting the vascular system with gelatinous indian ink. The arterial vascularization of the muscular layer is essentially tributary of the submucosal network through short, medium and long muscular recurrent arteries and accessorily through short and long muscular arteries. These arteries anastomose to form an intermuscular plexus which is also nourished by intermuscular arteries directly arisen from the straight arteries. The venous drainage of the muscular layer is also tributary of the subserous, submucosal and intermuscular networks. This drainage is either of deep type when directed towards the submucosal network, or of mixed type when tributary of both, the subserous and submucosal network.

Arteries↗