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Biomedical subjects

M T Iba-Zizen

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

At least 109 records · Page 6Linked to original sources
PubMed1978

Computed tomography of the optic nerve: part I. Normal results.

In vivo visualization of the optic nerve (ON) by computed tomography (CT) has important clinical applications, both realized and potential. An accurate CT analysis of the ON is, however, hampered by a number of technical limitations. Sinuosity and gaze-shift-related motility of the ON tend to increase the difficulties of demonstrating in a consistently satisfactory fashion this anatomical structure. Nevertheless, if rigid imaging criteria are followed, adequate visualization of the ON may be attained in the majority of patients. Simultaneous visualization of the ON and the eyeball permits establishment of a neuroocular index for clinical use.

Humans↗
PubMed1978

[Arterial vascularization of the optic nerve trunk in humans (author's transl)].

We study the arterial vascularization of the trunk of the optic nerve partialarly in its anterior part in human. We injected in the carotids, a mass of colored an radio opaque substance, in the whole cadaver that allows simultaneously a visual study and a radiologic control of the results. This one is completely insufficient to allow a study of details; so we used the diaphanisation as described by Spalteholz; we were able to confirm Hayreh's results: the ophthalmic artery has a variable pathway according to individus but overcrosses the most frequently the optic nerve. The posterior ciliary arteries have also an origin pathway very variable; the posterior external ciliary is the most commonly present. The central retinal artery takes its origin the ophthalmic artery no more than half of the cases, and elsewhere from a common trunk with the ciliary arteries, or even from branches of those last arteries. It always penetrates the nerve in its inferior face and is responsable of its vascularization in periphery by the man of its pial branches and in depth by its intra neural branches.

Aged↗
PubMedDate not supplied

MR appearance of the normal chest after pneumonectomy.

Magnetic resonance (MR) imaging of the chest was performed in nine patients who had undergone pneumonectomy, to evaluate postoperative chest anatomical changes. The main criterion of selection in this study was the absence of cancer recurrence at the time of the study and 6 months later (normal clinical, fiberoptical and cytological data and normal laboratory values). All the MR studies were compared with chest CT performed within 15 days after MR imaging. Postpneumonectomy space revealed in all cases a heterogeneous signal both on T1- and T2-weighted spin-echo sequences. Vascular and bronchial stumps were clearly delineated and surrounded by low signal areas, considered to be postoperative scars. Spatial involvement was well understood with frontal and axial views. Calcifications were poorly identified. Surgical clips were easily detected, but they were difficult to locate accurately. No adverse effects was reported, either in patients with or without surgical clips.

Adenocarcinoma↗
PubMedDate not supplied

Migrainous cerebral infarction: a tomographic study of cerebral blood flow and oxygen extraction fraction with the oxygen-15 inhalation technique.

A patient with migraine who had a permanent visual field defect was studied by angiography and CT scan. He also had a tomographic study of cerebral blood flow (CBF) and oxygen extraction fraction (EO2) using the non-invasive continuous oxygen-15 (15O) inhalation technique. Angiography was normal. CT scan revealed an area of decreased density with contrast enhancement suggestive of a recent infarct in the left occipital lobe. The 15O inhalation technique showed a decrease in CBF and EO2, typical of recent infarcts, in the corresponding area, an increase in CBF with normal EO2 in the left temporal lobe, and a decrease in CBF with increased EO2 in the right occipital cortex. These findings illustrate the unusual nature and extent of the ischemic process underlying migrainous cerebral infarction.

Cerebral Angiography↗