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Biomedical subjects

D Régent

Publications and source records attributed to D Régent.

At least 19 recordsLinked to original sources
PubMed1992

[Imaging of HIV+ abdominal involvements].

Abdominal symptoms are among the most frequent complaints of patients with AIDS. Because precise diagnosis from symptoms alone is difficult, the contribution of radiologist is important to fill in evaluating the cause of various illnesses. The review describes common clinical symptoms and lists the most likely causes with discussing the most appropriate imaging evaluation. For diagnosis and treatment, the most frequent and characteristics radiographic findings are described.

Acquired Immunodeficiency Syndrome↗
PubMed1991

[Bone densitometry: technical principles and practical value].

X-ray dual photon absorptiometry has replaced isotopic mono and dual photon absorptiometry in the assessment of metabolic bone diseases. This method is a valuable tool for epidemiologic studies. Individual examinations give poor in vivo accuracy and precision. Further technical improvements are needed to give bone densitometry a predictive value for osteoporotic risk.

Absorptiometry, Photon↗
PubMed1990

[Fractures caused by bone insufficiency of the proximal femoral epiphysis. Contribution of MRI].

The fractures by bony insufficiency are particularly well seen on MRI. On T1 weighted images they are detected as a very hypointense line surrounded by a hypointense area. On T2 weighted images, the hypointense line is also recognized and represents the fracture surrounded by a hyperintense area due to oedema or hemorrhage. Five cases of bony insufficiency fracture of the femoral head are reported. The features of the superior subchondral locations of these fractures and some primary and limited epiphyseal osteonecrosis are similar and consistent with a common pathogeny.

Aged↗
PubMed1988

[Magnetic resonance imaging of bone infarction. Apropos of 2 cases].

Bone infarcts, generally clinically latent, are only identified late in there course on x-rays, which reveal dense, irregular shadows resembling puffs of smoke situated in the metaphyso-diaphyseal regions of the long bones. Occasionally, they may be responsible for pain and are suggestive of neoplastic degeneration. MRI examination is valuable in these cases. Like necrosis of the femoral head, bone infarcts are demonstrated early in their course by MRI, which reveals zones of reduced signal with irregular margins with scattered areas of increased signal of fat intensity.

Adult↗
PubMed1987

[Extension to the thoraco-abdominal wall of actinomycoses. Value of computed tomography].

Four patients with deep visceral actinomycosis infections presented evidence of extension to the thoracic or abdominal wall. Investigation of the chronic parietal suppuration by CT scan imaging allowed definition of the nature and extent of parietal infiltration, and notably to demonstrate its anatomical continuity with the often unrecognized deep focus: chronic lung disease, appendicular or colon mass, chronic genital infection in patients with intra-uterine device.

Abdominal Muscles↗
PubMed1987

[Spondylarthropathies or ossifying polyenthesitis. Scintigraphic and scanographic evidence].

Ossifying enthesites present an undeniable diagnostic value in every chronic inflammatory rheumatism at an early stage, not only in adults but also in children. Bony scintigraphy discovers them in most localizations at a preradiological stage, as soon as they cause pain. The scanner examination enables to follow the anatomical evolution of the ossifications. It is perfectly suitable for the study of sacro-iliac and interapophyseal joints. Ossifying enthesites, the evolution of which spreads over several years, often depend on mechanical, professional or athletic constraints. Ossifying enthesitis is a common characteristics of "classic" spondylo-arthropathies which are all ossifying polyenthesites: ankylosing spondylarthritis, psoriasic rheumatism, rheumatism of enteropathies, Fiessinger-Leroy-Reiter syndrome and juvenile spondylo-arthropathies.

Adult↗
PubMed1979

[The value of arteriography in the diagnosis and treatment of post-traumatic secondary impotence (author's transl)].

Angiographic investigations in 9 patients with partial or total post-traumatic secondary impotence present for several years, confirmed the presence of traumatic vascular lesions involving, in nearly all cases, the artery of the penis or its branches (cavernous and bulbar arteries). Selective angiography of the pudendal arteries was able to guide treatment in 5 of these patients. Epigastrocavernous anastomoses, according to the microsurgical procedure developed by Michal, were performed with excellent results in 3 cases.

Adult↗
PubMed1978

[Critical study of the value of superior mesenteric arteriography in the diagnosis of Meckel's diverticulum. Radiological and clinical findings in 10 cases (author's transl)].

The authors underline the value of selective superior mesenteric arteriography in the diagnosis of Meckel's diverticulum. In the ten cases reported, seven were found to have a Meckel's diverticulum on operation, while it was absent in the other three. Arteriography was able to diagnose its presence correctly in sex patients, gave a false positive diagnosis in three cases, and was considered to be normal in the last case in which a Meckel's diverticulum was present. Valid radiological signs are extravasation of the contrast medium into the lumen of the digestive tract and the presence of a vitellin artery dividing into a vascular network. The single fact of a hypervascularized zone at the end of the superior mesenteric artery dividing into a vascular network. The single fact of a hypervascularized zone at the end of the superior mesenteric artery without definite artery formation is not as valid and its interpretation is difficult.

Adolescent↗
PubMed1977

[Splenic arterial aneurysm rupturing into the splenic vein. A rare cause of acute fortal hypertension in the post-partum period (author's transl)].

Following the sudden onset of a clinical syndrome of acute portal hypertension in a young woman in the course of childbirth, angiography revealed a voluminous aneurysm of the splenic artery rupture into the splenic vein. Surgical treatment was successful. The authors review the main characteristics of splenic arterio-venous fistulae and discuss the physiopathological problems of portal hypertension associated with such lesions.

Adult↗
PubMed1976

[The value of double contrast radiological exploration in the study of pathological appearances of the greater curvature of the stomach (author's transl)].

The authors indicate the special points relative to effective double contrast radiological exploration of the greater curvature of the stomach (high titre barium suspension, with high covering power; maximal insufflation of the gastric cavity; decubitus films always complemented by filling images in procubitus and in a vertical position. They then present the principal features which may be encountered using the method: -addition images in relation with ulcerated lesions; -lacunae indicative of localised parietal proliferation; - "double contour" appearances corresponding to infiltrating tumors with a broad surface; - "thick folds" of the greater curvature which, apart from the classical causes, should first suggest an inflammatory or tumoural process in the underlying pancreas; - extrinsic imprints, the topographical location and appearances of which may indicate their origin.

Humans↗
PubMed1976

[Double contrast exploration of the stomach after surgery (author's transl)].

The authors describe the application of double contrast radiological exploration in the stomach after surgery. They show normal and pathological results after the principal types of gastric surgery: excisions, conservative procedures, hiatal hernia surgery. Apart from the post-operative period, the technique may be used without major difficulties. The precise images obtained render it the technique of choice for the detection of the organic complications of gastroduodenal surgery.

Gastrectomy↗
PubMed1975

[Rapid 105 mm ampliphotography (author's transl)].

The authors report the results obtained with a new 105 mm ampliphotographic camera for filming at high speeds (camera GV 105 of the General Radiological Company). Thanks to a rate of 8 films per second, this camera seems particularly interesting for the study of sphincters and fleeting phenomena. However, the quality of the images, comparable with those of standard films, the rapidity of the examinations, the easy reading of the films, the important reduction in the dose of X Rays delivered and the economy of film, render advisable the use of this technique in general radiology. Unfortunately, there is not at present a simple, rapid formula for presentation of the films obtained. Progress will also have to be made in order to facilitate loading of the camera. Rapid resolution of these problems will permit this technique to be more widely used.

Bronchography↗
PubMed1975

[Dodger filters in the modulation of X-Ray beams (author's transl)].

Dodger filters represent a very great improvement in the usual technique of modulation of X-Ray beams, The mobility of the filters permits one to use them efficaciously in numerous situations encountered in common radiodiagnosis. Original optical methods ensure perfect adaptability of the filters to morphology and density of the structures examined. The shape and structure of the filters prevent formation of artefacts ducts mains interference on the X-Rays. To an improvement in the quality of the films, may be adder reduction in exposure of the examined subjects. This apparatus, easy to bring into operation, may thus be used more widely in numerous branches of radiodiagnosis, in particular, in cerebral and visceral angiography.

Humans↗