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Biomedical subjects

M T Iba-Zizen

Publications and source records attributed to M T Iba-Zizen.

At least 73 records · Page 4Linked to original sources
PubMed1986

Magnetic resonance imaging of the opto-chiasmatic region. Report on 276 cases.

A total of 276 lesions in the sellar and parasellar region were studied with magnetic resonance imaging using two different magnets of 0.15 and 0.5 T, respectively. Examination in the sagittal plane is recommended. T1 weighted images will give anatomic details, T2 weighted images the tissue characteristics. No marked differences with regard to diagnostic results were noted with the two different magnets, although the signals appeared to be more intense when using a 0.5 T magnet.

Adult↗
PubMed1986

Cephalic magnetic resonance imaging of boxers. Preliminary results.

A prospective study of 52 boxers, 20-60 years, 13 of them amateurs and 39 professionals, has been made using magnetic resonance imaging (MRI) at 0.15 T. Twelve of the boxers were still active, while the other 40 had retired after about 10 years of boxing. Multi-slices in two planes without gap were performed using T1 and T2 weighted sequences. The findings were correlated to the number of matches, the number of knock outs, the severity of head trauma, the style of the boxer, and to the clinical findings and the findings at EEG. There was a good correspondence between the presence of lesions and the style of the boxer. The changes noted--mainly atrophic--occurred among those with capacity to 'stand punishment'. MRI offers an opportunity to evaluate the effect of trauma and the information obtained may be used to prevent disabilities among boxers.

Adolescent↗
PubMed1986

Mathematical morphology for automatic detection of brain lesions at magnetic resonance imaging.

An original method of image analysis has been developed, using 'mathematical morphology', in order to detect brain tumors at magnetic resonance imaging of the head following injection of gadolinium-DPTA. The main steps of the analysis are as follows: 1) Spatial reduction by automatic determination of a region of interest, 2) elimination of noise by morphologic filtering (increasing alternate closing-opening sequence), 3) localization of tumor by searching for r-h maxima, and 4) extraction of tumor contours using three-dimensional structuring elements. The preliminary results of this automatic and robust method encourage further studies of the potential of tissue analysis as an aid to tumor diagnosis.

Brain↗
PubMed1985

[Magnetic resonance imaging of the head compared with the CT scan].

After the description of the normal head anatomy in MRI and its exploration plans, the images observed in benign and malignant tumours of the brain, in cerebral ischaemic attacks, in the diseases of the orbit, face and skull base, are considered. The limits and present indications of the technique are defined.

Brain↗
PubMed1985

[Spinal forms of multiple sclerosis. Value and criticism of examination by cerebral magnetic resonance. Apropos of 4 cases].

Four observations of spinal forms of multiple sclerosis (MS) have been studied by Magnetic Resonance Imaging (MRI) (Magniscan Thomson CGR 0,15 and 0,5 T). They concerned 3 females and 1 male, aged between 29 and 60. Evolution of MS varied between 1 year and 9 years. There were no familial story of neurological illness; there were no signs and symptoms of visual, oculo-motor, labyrinthic and cerebellar disorders in the past. VEP were abnormal in 2 cases (no 1, 3), BAEP in 1 case (no 2). CSF examination showed increased gamma globulins with an oligoclonal pattern in 2 cases (no 3,4). CT Scan performed with iodine contrast injection was normal in 3 cases (no 2,3,4). In all the cases, MRI using T2 weighted-SE sequences, showed high signal lesions in the white matter of the brain and/or the cerebellum, and periventricular patchy white matter lesions. It seems to be no relationship between the duration of MS and the number of abnormal high signals areas, but more important series are necessary to confirm or not such a result. These lesions seem to be without aetiological specificity. They have to be discussed according to the clinical biological, electro-physiological data and sometimes others neuroradiological procedures.

Adult↗
PubMed1984

[Atlas of head anatomy in the neuro-ocular plane].

The "Atlas of cross-sectional orbito-cephalic anatomy in the neuro-ocular plane" does exist (now in press). The authors submit the main clinico-anatomical correlations observed. We will remind you that the "neuro-ocular plane" (N.O.P.) is defined as the C.T. plane of cephalic orientation comprising "both lenses, optic nerve heads and optic canals in the primary position of gaze". The more informative anatomical, radiological and anthropological data that could derive from the N.O.P. are stressed; first, we will evaluate the validity of our work and the problems we had while building the atlas; then we will describe briefly the position of this cephalic orientation plane as compared to other planes (specifically the anthropological baseline, the orbito-meatal line, the vestibular orientation etc...) previously described. Finally, we will end our discussion by giving the anatomical correlations obtained in the N.O.P.: this plane would best include all the visual pathways starting "from the cornea to the calcarine fissure"; it would also reflect the same orientation of the temporal horn of the lateral ventricle as well as the orientation of the lateral fissure. Much more, the orthogonality of this cephalic orientation to the direction of the brainstem is demonstrated, enhancing the accuracy of the three dimensional approach in the evaluation of the orbito-cephalic anatomy and diseases, as actually completed with C.T. and N.M.R. imaging, at the Centre National d'Ophtalmologie des XV-XX in Paris.

Anatomy, Artistic↗