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K Bootsveld

Publications and source records attributed to K Bootsveld.

8 recordsLinked to original sources
PubMed1995

[DIL vena cava filter. Initial experiences in 15 patients].

DIL filters were permanently inserted through the cubital vein, using a 7-F catheter, in 15 patients and were followed up for six months in 12 patients. One filter could not be opened and 4 others were only partly open. Clinically there were no recurrences of pulmonary emboli. There were no complications from the correctly placed filters. Amongst the 4 incompletely expanded filters, two caused perforation of the cava, in one the cava thrombosed and in another the filter migrated to the bifurcation of the pulmonary artery. It follows that unexpanded filters should not be placed in the cava. Measurements in 10 patients showed the cava reduced to less than 10 mm lumen. In two cases the reduction of lumen was only slight, measuring more than 15 mm. The effect of the reduction in the lumen remains to be compared with that achieved by other filters.

Aged↗
PubMed1995

[Primary amyloidosis of the lung].

We report on a female patient of 66 years of age in whom primary nodular amyloidosis of the lung was diagnosed on the basis of a chance radiological finding. Based on this case report we discuss the pathophysiology, diagnosis and clinical findings of pulmonary amyloidosis.

Amyloidosis↗
PubMed1994

[The role of MRT in detecting the cause of therapy-refractory partial complex epilepsy].

MRT is of considerable significance in the investigation of epilepsy because of its ability to render soft tissue contrast for the demonstration of structural lesions. The present retrospective study consists of an analysis of MRT findings in operatively confirmed, circumscribed temporal tumours and in hippocampal sclerosis. The examinations were performed under standard conditions using T1- and T2-weighted spin-echo sequences of the head and coronal T2-weighted gradient-echo sequences of the brain stem. The diagnosis of tumours was extremely accurate (22/23) and specific (18/23) whereas hippocampal sclerosis could not be satisfactorily demonstrated (5/18). The use of intravenous contrast medium did not provide any advantages.

Adolescent↗
PubMed1994

[The value of MR tomography after transsphenoidal hypophyseal resection. A retrospective comparison between endocrinology, operation and MRT].

Postoperative magnetic resonance images of 40 patients after transsphenoidal surgery for pituitary adenoma were evaluated retrospectively. The signal intensities of packing material and residual tumour were analysed. T1-weighted spin-echo sequences were obtained in coronal and sagittal views with and without intravenous injection of contrast media. Residual tumour demonstrated homogeneous or inhomogeneous signal intensity on the native scan with homogeneous or inhomogeneous enhancement. Packing material demonstrated a homogeneous signal intensity on the images obtained without injection of contrast media with a peripheral enhancement or alternate layers of low and intermediate signal intensity with alternate enhancement after injection of contrast media. In 5 of 54 examinations different results were found in MRI, endocrinology and surgery (two false negative and one false positive MRI in correlation with endocrinology; two residual tumours on MRI where surgery was supposed to be complete). Application of intravenous contrast media facilitates the interpretation of postoperative examination of the pituitary gland as well as comparison with preoperative examinations and the knowledge of the intraoperative procedure.

Adenoma↗
PubMed1993

[Intracranial ECoG electrodes. Location determination using three-dimensional reconstruction of MR data of the brain as a component of the presurgical diagnosis of epilepsy].

Subdural strip electrodes or intracerebral electrodes are required in order to precisely localize epileptic foci, which is mandatory for epilepsy surgery. The subdural electrodes are inserted via a borehole and thus precise positioning cannot be directly monitored. Therefore, the location of the electrodes in relation to the gyri and sulci has to be determined by imaging techniques. In this study, a three-dimensional magnetic resonance imaging (3D MRI) technique was used for visualization of intracranial EEG electrodes. A 3D gradient echo sequence with thin slices of 1 mm is required for the assessment of the gyral anatomy of the brain surface. Using a short repetition time of 30 ms good image quality within an acceptable acquisition time of about 15 min was possible. Post-processing with 3D surface reconstruction was performed using a Sun workstation. Three-dimensional reconstruction allows a more precise delineation of the localization of the EEG electrodes and the simultaneous display of the adjacent brain structures. Misplacement of intracranial electrodes is readily detected. 3D MRI with 3D surface reconstruction proved superior to 2D imaging and CT for the assessment of EEG electrode localization.

Electrodes↗
PubMed1992

[Spontaneous necrosis of the femoral condyle--new findings in T2-weighted spin-echo sequences and gradient-echo studies].

The spontaneous necrosis of the femur condyles might cause diagnostic problems because clinical symptoms precede the radiologic changes on conventional x-ray. MRI offers an early detection of the necrosis of the femur condyle like bone necrosis of other localisation. Nine patients were examined by T1- and T2-weighted spin echo- and by T2*-weighted gradient echo sequences. All patients had reduced signal intensity in the subchondral bone marrow on T1-w SE sequences. In three patients new findings were observed on T2-w SE and gradient echoes respectively. These findings allow better understanding in the underlying pathologic-anatomical changes.

Aged↗
PubMed1992

[Primary amyloid tumor of the lung].

Primary idiopathic amyloidosis may be a diagnostic problem because of its low incidence and its variable manifestations. The clinical and radiographic findings in a patient with accidentally discovered primary amyloidosis of the lung are presented. The extensive mediastinal and hilar lymph-node enlargement was striking. Peripheral bronchial carcinoma was initially suspected because of the radiographic and CT findings. Various patterns of pulmonary amyloidosis have to be considered in the differential diagnosis of nodules and interstitial changes of the lung.

Amyloidosis↗