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C Pharaboz

Publications and source records attributed to C Pharaboz.

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

[Dacryocystography using CT and MRI. Comparative study apropos of 13 clinical cases].

Magnetic Resonance Imaging of a dacryocystography and a watersoluble computed tomographic dacryocystography were compared in 13 prospective cases after facial traumas, infections or without previous history. All had either watering eyes, ephiphora or dacryocystitis. This study demonstrated the superiority of computed tomography which must be used in first intention for complexe problems of the lacrimal drainage system. Only tumoral pathology (very rare) requires Magnetic Resonance Imaging. Combined computed tomography and dacryocystography in the same time provide diagnostic precision and less radiation. Confortable for the patient by helicoidal acquisition, computed tomography is cheaper than a Magnetic Resonance Imaging.

Adult↗
PubMed1995

Clinical diagnosis compared with findings of magnetic resonance imaging in 242 patients with internal derangement of the TMJ.

The aim of this study was to compare the provisional diagnosis based on an initial clinical examination with subsequent findings of magnetic resonance imaging in patients with internal derangement of the temporomandibular joint. Clinical examinations were conducted on 242 patients (198 women and 44 men) who had unilateral (51%) or bilateral (49%) temporomandibular joint internal derangement. They were divided into the following categories: (1) disc displacement with reduction; (2) disc displacement without reduction; (3) "stuck" disc; (4) degenerative arthrosis with or without one of the above; and (5) normal temporomandibular joint of the contralateral side. There was no statistically significant difference in the distribution of disorders on a unilateral or bilateral basis or in the prevalence of disorders in right versus left joints. Based on the high occurrence of matching true-negative data, this study showed a highly statistically significant correlation between the magnetic resonance findings and the clinical data for all categories of derangement. Despite this high correlation, the magnetic resonance imaging and clinical diagnoses matched exactly in only 287 of the 484 joints studied. There was only partial agreement in the remaining 197 joints. The best clinical diagnosis in relation to the magnetic resonance findings was observed in the arthrosis category followed by the categories of normal joint, disc displacement with reduction, stuck disc, and disc displacement without reduction, in descending order. This study strongly suggests that degenerative arthrosis is a result of a long-term displaced disc. The clinical examination alone did not correctly indicate all the structural defects; therefore, it is insufficient for determining the status of the joint.

Adult↗
PubMed1994

[Role of MRI in pre-clinical breast lesions. Preliminary results].

The purpose of this study is to assess the value of MR imaging in nonpalpable breast tumors. Thirty-two women whose mammogram showed opacity, architectural distorsionor microcalcifications, underwent preoperative dynamic MR studies with quantitative evaluation of contrast enhancement. MR showed early contrast enhancement in 10/12 breast cancers (2 false-negative) and in 6/20 benign lesions (false-positive). Quantitative study of contrast enhancement does not allow clear differentiation between these lesions. Further studies are required to confirm these findings and purpose MR imaging for aid in detection of carcinomas. Multifocal sudden enhancements are possible in benign lesions and incite to limit MR to focal mammographic abnormalities.

Adult↗
PubMed1992

[Thrombosis of the cerebral veins. X-ray computed tomography and MRI imaging. 11 cases].

11 cases of cerebral venous thrombosis in adults are reported. Main clinical signs are: intracranial hypertension (headache, nausea, papilledema in 7 cases, loss of consciousness in 6 cases, neurological deficit in 6 cases, seizure in 4 cases. 1 patient is dead, who did not receive heparin treatment. Delay before diagnosis is between 2 and 20 days, and is shortened when arteriography or MRI are available and prescribed. At least one (or several) CT examination was performed in 10 patients. Direct signs of thrombosis are uneasily detected without contrast injection, seen here in 4 cases. Empty delta sign is observed in 7 patients, lately in 4 cases, and once only afterwards. Cerebral infarction is visualized in 7 cases over 10. Its features frequently seem evocative for cerebral venous thrombosis: triangularin 4 cases or nodular shape in 3 cases with hemorragic infarct in 7 cases, with bilateral topography in 6 cases, in frontal or central areas in 7 cases. 6 patients had a MRI examination. All cerebral infarctions appeared haemorragical, even at early stages. During subacute period, venous thrombosis is constantly and easily detected by the mean of methemoglobin high signal intensity on T1 weighted images. The prediagnosis delay is short, without necessity of arteriography. MRI should take the place of CT and arteriography in investigation of a clinically suspected cerebral venous thrombosis.

Adult↗
PubMed1992

[MRI techniques for the study of the temporal lobe and its environment].

The MR study of the temporal lobe and its environment requires a good knowledge of the anatomy in order to select the views adapted to the disease investigated. The authors propose a series of protocols according to the region examined. An understanding of the principles of MR sequences is also essential to avoid the problems of investigation associated with this complex anatomical region. The principal sequences are reviewed together with their advantages and disadvantages.

Cerebellopontine Angle↗
PubMed1991

[Disk highlighting after injection in MRI. Macroscopy and histology of 25 postoperative recurrences].

400 cases of failed back syndrome were examined with MRI in a prospective study (SE w Rho and T2, SE wT1 before and after injection of paramagnetic contrast agent in axial and sagittal planes). After second time surgery, 70 cases of herniated disks were found. 25 herniated disks were studied in microscopy and results correlated with enhanced herniated disks. Authors describe 4 types of enhancement: veinous plexus (5/24), inflammatory or granulomatous tissue (12/24), degenerative disc with fibrosis (5/24) and osteophytosis (2/24). The criterions of each pattern are described.

Adult↗
PubMed1991

[Relations between neurinoma of the VIII cranial nerve and the porus of the internal auditory meatus. Apropos of 110 cases].

110 cases of neurinomas of the VIIIth with APC extension (104 patients) were studied using MRI or CT. Classically, it is said that the tumoral mass is centered on the IAC. In our study, among 110 cases of neurinomas, only 9 were centered along the axis of IAC on axial slices and only 23 on coronal slices. The anterior development of the tumor is never more than 1 cm, except in 3 cases of large and multicystic neurinoma. We suggest that the anterior development of large tumors is limited by the VIIth nerve.

Adolescent↗
PubMed1989

[Rhinopharyngeal craniopharyngioma. CT X-ray and MRI aspects].

The authors report about a rare site of craniopharyngioma, purely extracerebral and located in the sphenoid sinus and the rhinopharynx. No CT or MRI sign is pathognomonic for the lesion, but the presence of a fleshy process containing calcifications and cystic formations must lead to evoking this diagnosis. MRI assesses the extent of the lesions perfectly, but fails to detect small calcifications or ossifications accurately.

Adult↗
PubMed1989

[The diagnostic importance of different imaging technics in temporomandibular joint dysfunction].

Various imaging techniques enable to explore the Temporo-mandibular joints (T.M.J.). The physicians prescribing them, must be perfectly aware of the informations they provide as well as their costs, for a judicious formulation of their indications. Conventional radiography is absolutely necessary and, most of the time, sufficient, since it simply permits to evaluate the bony structures. An orthopantomogram and modified Schüller views of each T.M.J., "open mouth" and "closed mouth" will be performed. Conventional tomograms are no longer indicated. They will be abandoned for Computed Tomograms. This examination permits, at a relatively low cost, to analyse a bony abnormality and explore the muscular soft tissues. It may also be possible to assess the meniscus, its position and displacement when the mouth is opened. In fact, if a meniscal or articular pathology is considered, which could result in surgical or endoscopic procedure, it is absolutely necessary to perform: -either an arthro-tomography, with contrast material, -or a magnetic resonance examination. The latter provides perfect anatomical and pathological informations of the joint and meniscus, in an atraumatic fashion for the patient. Its only contraindication is in the cost of the examination. It will be possible to look for a dislocation, a malformation or a structural alteration of the meniscus which could result in a perforation, a rupture of the posterior frenulum, adhesions or joint extravasation. A necrosis or early osteochondritis of the condyle will be ruled out.

Humans↗
PubMed1988

[Aneurysmal bone cyst of the ethmoid. Apropos of a case].

Repeated epistaxis in a 12 year old child revealed an aneurysmal bone cyst of ethmoid, an exceptional localization for this lesion. Modern imaging techniques (CT scan, NMR) provided precise data on its extent, primordial for decision as to surgical approach. NMR imaging was more effective than the CT scan for diagnosis, since blood lakes were identified, and for determination of extent, since tumoral elements were distinguished from sinusal retentions.

Bone Cysts↗
PubMed1987

[Early syringomyelia following benign cervical injury. Contribution of postoperative MRI].

The authors show an observation of a post traumatic syringomyelia syndrome which gradually developed a few months after a cervical sprain. The diagnosis has been mentioned after the discovery of a "big medulla" with myelography and computed tomography. The presence of a cervical cystic cavity with viscous liquid has been confirmed by surgery. A syringosubarachnoïd shunt has been carried out with excellent post operative results as the patient has recovered all his sensory and motor functions. For the pathogenic hypothesis mention is made of a small subclinic early hematomyelia which then develops on its own to form a genuine syringomyelic cavity. The authors emphasize the future interest of M.R.I. for the pathogenic diagnosis as well for the post operative effects.

Adult↗
PubMed1987

[Magnetic resonance imaging in the diagnosis of soft cervical disk hernia. Evaluation report on 20 cases previously examined by x-ray computed tomography].

Twenty successive patients were examined using CT scanning followed by M.R.I. Thirteen were subsequently operated upon. The results are reported in detail, specifying which signals were used to make the diagnosis of cervical disc prolapse. Short sequences were used for degeneration in the herniated disc, disc protrusion into the spinal canal and compression of the spinal cord. Long sequences were used for indentations or blocks in the cerebro-spinal fluid column at the level of the disc prolapse. Ordinary disc degenerations and associated stenoses are also shown. The reliability of the method was established by comparison with radiographs and surgical findings which were shown to be positive in all the 13 cases treated surgically. The report discusses the difficulties and current limitations of magnetic resonance imaging such as the scarcity of machines, the supine position, the length of the examination, the mediocre quality of horizontal axial sections and difficulties in transmitting magnetic resonance information. There is expected to be rapid and decisive progress with the use of rapid imaging, the preferential choice of sequences, the use of scout views and closer collaboration between radiologist and clinician. A final section is devoted to a discussion of the relative merits of CT scanning and M.R.I. The latter has the advantage of providing total three-dimensional information, particularly in the sagittal plane with a better appreciation of the relationship between container and contents and a method which is strictly non-invasive with the use neither of contrast medium nor X-rays. The authors conclude that M.R.I. provides a positive contribution to the diagnosis of cervical disc protrusions and that this technique can, from now onwards, be considered the examination of choice.

Adult↗