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Biomedical subjects

G Bargon

Publications and source records attributed to G Bargon.

At least 19 recordsLinked to original sources
PubMed1992

[The diagnosis of spinal trauma: the indication for CT and myelo-CT on the day of the injury].

During a period of 24 months, 211 patients were investigated in our radiological clinic by emergency CT of the spine on the day of the injury. In 128 (61%) a traumatic lesion could be demonstrated. Most frequently involved were the transitional zones of the spine (occipito-atlanto-axial segment, cervico-thoracic and thoracolumbar segments). In 68% of these patients, conventional radiographs of the spine of these critical zones proved to be inadequate. 20% of the lesions demonstrated by CT could not be seen on conventional radiographs and 41% were shown incompletely. In 61% of cases CT provided additional information when compared with conventional radiography.

Emergencies↗
PubMed1992

[The imaging of regional brain perfusion with dynamic magnetic resonance tomography].

Bolus injections of gadolinium-DTPA result in high contrast concentration in the distal vessels within the brain and cause a local disturbance of the magnetic field with a shortening of T2 relaxation time. Pulse frequencies were designed to demonstrate inhomogeneities in the magnetic field. The resultant reduction in T2-weighted gradient echo signals was used in order to examine changes in regional perfusion caused by pathological conditions. Cerebral tumours showed variable perfusion patterns but were always better perfused than surrounding brain tissue; oedema surrounding the tumour resulted in reduced perfusion. Ischaemic infarcts showed significant underperfusion compared with control areas. In both groups the areas involved were larger on the perfusion scans than on T2-weighted images.

Brain↗
PubMed1992

[Computerized tomography of intra-articular calcaneus fracture. Comparison: radiomorphologic result--clinical result].

In 55 patients with intraarticular fracture of the calcaneus computed tomography of the fractured bone was performed immediately after the accident and 6-12 months later. We recorded the fracture type according to the classification established by Essex-Lopresti. We evaluated the degree of bony destruction, deformation of the calcaneus and the extent of articular bursting. We recorded the severity of the fracture with reference to a 10-point scale and compared this with the clinical outcome after surgery or conservative therapy. The clinical results were according to a 18-point scale devised by Merle d'Aubigne. Changes between the initial and follow-up CT were also recorded. There was a good correlation between radiological findings and clinical results.

Adolescent↗
PubMed1991

[Congenital and acquired anomalies of the inferior vena cava. Differential diagnosis using digital subtraction angiography and computed tomography].

Segmental aplasias of the inferior vena cava, thrombosis of the vena cava, tumour infiltration (e.g. renal neoplasms via the renal vein) and external compression (e.g. large hepatic metastases) may produce similar radiomorphologic changes in chest x-ray DSA and CT. These radiomorphological changes are described by case reports. DSA clearly demonstrates the course of the vessels and the collaterals involved. CT may elucidate the paracaval vascular changes. It is only a synopsis of cavography (DSA) and CT with reference to embryogenesis that will lead to a reliable diagnosis and enable a definite decision on therapy and prognosis.

Adolescent↗
PubMed1991

[Imaging of cerebral flow dynamics using MR angiography and selective pre-saturation: initial experiences].

MR angiography with selective pre-saturation was applied in 5 normal volunteers, 22 patients with cerebrovascular disease, 3 patients with arteriovenous malformations (AVM) and one patient with thrombosis of the superior sagittal sinus. The results were compared with Doppler ultrasound and conventional angiography. MR angiography reliably demonstrated the direction of blood flow and the presence or absence of collateral flow in the circle of Willis. Collateral flow via leptomeningeal vessels and the ophthalmic artery could not be demonstrated. In the patient with superior sagittal sinus thrombosis, the absence of flow was well seen. MR angiography was able to demonstrate the major supplying arteries in the patients with AVMs. MR angiography is a valid noninvasive means to demonstrate direction of flow and blood supply of the major intracranial arteries.

Cerebral Angiography↗
PubMed1990

[The use of sonography in the diagnosis of fresh talofibular ligamentous lesions].

Sonography of the ankle joint is a simple method of exploring articular soft tissue. 100 patients with acute injury of the lateral ligaments were examined with a 7.5 MHz linear array transducer. Diagnostic criteria were haematoma and capsular deformation. Sonographic findings were assessed by stress films (n = 94), arthrography (n = 29) and operative evaluation (n = 28). In 94 of 100 joints, acute injury could be demonstrated with sonography. In most cases sonography was able to differentiate the site of the lesion: anterior talofibular or fibulocalcaneal ligament. The positive predictive value in relation to the operative findings is 100% for talofibular ligament and 96% for fibulocalcaneal ligament.

Adult↗
PubMed1990

[The use of imaging techniques in the diagnosis of pancreatic diseases].

The present paper discusses the use of modern imaging procedures in the diagnosis of various pancreatic diseases. Specific examination patterns are referred to their underlying pathological pancreatic processes to allow the best possible interpretation of the results of each technique. At present, magnetic resonance imaging does not play a decisive role in the diagnosis of either pancreatitis or pancreatic tumorous masses.

Acute Disease↗
PubMed1990

[Value and reliability of hypotonic duodenography in chronic pancreatitis].

The incidence of pathologic duodenal abnormalities in patients suffering from chronic recurrent pancreatitis is derived from a retrospective analysis of 128 hypotonic duodenographies. The value of established diagnostic criteria and the present indication for a hypotonic duodenography in chronic pancreatitis are determined.

Barium Sulfate↗
PubMed1988

[Advantages in the diagnosis and classification of intra-articular fractures of the calcaneus using computed tomography].

The superiority of CT over conventional radiography in demonstrating intra-articular fractures of the os calcis was demonstrated in 34 patients. The advantages consist in being able to demonstrate the joint without superposition and the exact demonstration of the position, size, shape and number of fragments. Shortening or widening of the os calcis can be easily recognized, as well as fractures of the medial or lateral cortex. At the same time it is possible to evaluate soft tissues, particularly the peroneal ligament. The conventional classification of calcaneal fractures has been newly evaluated in the light of the ability to recognize involvement of the joint and the course of the main fracture lines.

Adolescent↗
PubMed1987

[Criteria for evaluating fractures and luxations of the upper cervical vertebrae using conventional x-ray technics].

To assess the diagnostic value of conventional x-ray examination in fresh injuries of the cervical vertebral column, 57 cases of dislocation or fracture of the cervical vertebral column were evaluated. This study revealed the special value of conventional tomography of the cervical vertebral column in vertebral body fractures without essential dislocation of fragments or without disturbing the frame structure of the vertebral bodies. Conventional tomography will always reveal in case of dislocation the exact relative positions of the disjointed articulate areas, whereas in dislocation fractures it is also possible to identify additional fractures in the vertebral arch and articular process areas, even if the x-ray film or plain radiography merely shows a defective position. The individual diagnostic criteria of fracture and dislocation of the upper cervical vertebral column are examined in respect of their diagnostic value.

Cervical Vertebrae↗
PubMed1986

[Intra-arterial digital subtraction angiography (i.a. DSA) in the preoperative diagnosis of abdominal masses].

The diagnostic value of i.a. DSA, compared with conventional arteriography (n = 48), was proven in patients (n = 116) with abdominal tumours including intrahepatic masses. Arteries supplying the tumour, anomalous vessels and pathological malignant vascular abnormalities were visualised reliably in i.a. DSA despite reduced spatial resolution. An improved definition of hypervascular tumours was possible during the early arterial phase and of hypovascular or avascular masses during the late parenchymal phase of i.a. DSA. The dynamic evaluation of contrast flow is simpler and more reliable using the continuous mode in i.a. DSA than with the static imaging of a conventional film sequence. The advantages of i.a. DSA in preoperative vascular mapping and in detailed diagnosis of abdominal tumours and masses result in replacing conventional arteriography with very few exceptions.

Abdominal Neoplasms↗
PubMed1986

Anomalous intrapulmonal vein drainage and pulmonary vein connection in DSA.

Anomalous pulmonary venous drainage can be detected and evaluated by angiographic studies. Now that intravenous DSA is available, this method can be used to demonstrate pulmonary venous return. This study presents the results of DSA examination in three patients having anomalous pulmonary vein connection with the left innominate vein and the superior vena cava respectively. In a fourth patient, intra-pulmonary atypical venous return could be demonstrated by DSA without anomalous connection. This minimal invasive procedure is diagnostically useful in anomalies of pulmonary veins when recommended post-processing techniques are evaluated, particularly in patients with additional cardiac septal defects.

Adult↗
PubMed1985

[Indications for digital subtraction angiography of the pulmonary vessels].

Different indications of pulmonary DSA are discussed based on experiences in 122 cases. The quality and accuracy of imaging is demonstrated by representative examples. Indications of DSA and conventional pulmonary angiography are principally identical. However, our experience in DSA suggests that this minimal invasive procedure may replace conventional angiography in most cases and abolish the strict indication. Supported by further critical tests the high diagnostic quality of DSA imaging in pulmonary embolism and therapeutical control may substitute radionuclide methods (perfusion-ventilation-scintigraphy) to avoid costs of a double examination.

Adolescent↗
PubMed1985

[Significance of pulmonary DSA for assessing the operability of lung tumors].

In lung tumours histological findings, exclusion of metastatic disease and different diagnostic procedures such as bronchoscopy, mediastinoscopy and thoracic CT play an important role for tumour staging to plan the correct therapeutic approach. Selection of patients for thoracotomy depends on results of these examinations. This study was carried out to assess the value of an additionally applied pulmonary DSA in 17 patients with lung tumours (bronchogenic carcinoma n = 14). Our results demonstrate that in 4 cases angiography could prove inoperability of tumours (compression of sup. v. cava, occlusion of a main pulmonary artery): one patient had a negative mediastinoscopy, one patient had a small cell bronchogenic carcinoma; in two patients an additional mediastinoscopy could be omitted. In two other patients with bronchogenic carcinoma who appeared operable in mediastinoscopy and DSA, explorative thoracotomy only could ensure inoperability due to an infiltration of the thoracic wall. As a minimal invasive method applicable in outpatients pulmonary DSA seems to be useful in giving additional important diagnostic information particularly in central bronchogenic carcinomas.

Aged↗