RöFo : Fortschritte auf dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
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Comparative Study
[Ultrasound- and fluoroscopy-guided implantation of peripherally inserted central venous catheters (PICCs)].
Evaluation of ultrasound- and fluoroscopy-guided implantation of peripherally inserted central venous catheters (PICCs). ⋯ The ultrasound guided placement of peripherally inserted central venous catheters (PICCs) via a superficial vein of the upper extremity is a practical alternative to central catheters via central veins.
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Comparative Study
[Quantification of atelectases in artificial respiration: spiral-CT versus dynamic single-slice CT].
Dynamic CT (dCT) allows visualization and quantification of ventilated lung and atelectases with high temporal resolution during continuous ventilation. This study compares a quantitative image analysis in a subcarinal single slice dCT series versus a whole lung spiral-CT, in order to analyze, whether the distribution of atelectasis of a single dCT series is representative for the whole lung. ⋯ The results of our study demonstrate that dCT allows monitoring of atelectasis formation in response to different ventilatory strategies. However, a deviation between dCT and spiral-CT has to be taken into account. In subcarinal dCT series, hyperinflated lung areas and atelectases were overestimated due to a craniocaudal gradient of atelectases, whereas normal ventilated lung was underestimated.
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Comparative Study
Optimization of contrast-enhanced peripheral MR angiography with mid-femoral venous compression (VENCO).
To compare a standard protocol for contrast-enhanced three-dimensional magnetic resonance angiography (3D CE-MRA) of the lower extremities to a high spatial resolution protocol with venous compression (VENCO) at the mid-femoral level. ⋯ VENCO 3D CE-MRA is simple to put into practice and advances the performance of multi-station MRA strategies for assessment of the peripheral arterial vasculature.
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Comparative Study
High spatial resolution whole-body MR angiography featuring parallel imaging: initial experience.
To combine whole-body multi-station three-dimensional contrast enhanced magnetic resonance angiography (3D CE MRA) using a self-developed rolling table platform with parallel imaging strategies (PAT) in order to increase the spatial resolution of the 3D MRA data sets. ⋯ The implementation of PAT into the concept of whole-body MRA enabled to increase the spatial resolution in all examined territories, which resulted in more detailed MR angiograms.
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Comparative Study
[Early prediction of treatment response to high-dose chemotherapy in patients with relapsed germ cell tumors using [18F]FDG-PET, CT or MRI, and tumor marker].
To assess the ability of [(18)F]FDG-PET, CT/MRI and serum tumor marker (TM) for the early prediction of response in patients with metastatic germ cell tumors (GCT) undergoing salvage high-dose chemotherapy (HD-CTX). ⋯ FDG-PET has a high prognostic value for predicting the response to chemotherapy in patients with metastatic GCT early in the course of treatment and may improve patient selection for subsequent HD-CTX protocols. Especially in patients with response to induction chemotherapy according to CT or TM evaluation, PET offers additional information to detect patients with an overall unfavorable outcome.