Hungarian Radiology

[A Farewell to Gyula Vargha 1921-2003]

KOLLÁR József

DECEMBER 20, 2003

Hungarian Radiology - 2003;77(06)

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Hungarian Radiology

[Navigation for image-guided procedures: a new modality and review]

HEINER Lajos, CHRISTIAN Krestan, STEPHAN Grampp, VADON Gábor, HERWIG Imhof

[Basic principles of two types of medical navigation are discussed. In patient-based navigation (PBN) image acquisition is followed by intervention. In modality-based navigation the imaging modality is present in the operation room, and a reference system is used. Advantages and disadvantages of both navigation types are listed. The steps of an interventional procedure with a new navigation system are described and illustrated. The role and possible future trends of navigation are finally summarized.]

Hungarian Radiology

[Activities of the Kaposvár Institute of Diagnostic Imaging and Oncoradiology]

Hungarian Radiology

[Comparison of different gastrointestinal contrast materials for MR examination, an experimental model]

BABOS Magor, PALKÓ András, KARDOS Lilla, CSERNAY László

[PURPOSE - Evaluation of different gastrointestinal endoluminal contrast materials by using an experimental model. MATERIALS AND METHODS - Authors constructed a plastic container holding six plastic cups, thus making possible to evaluate different compounds and concentrations, simultaneously. The signal intensity of more than 15 different materials (commonly used contrast materials, fruit juices, cocoa, iron containing solutions) was measured by T1 and T2 weighted spin echo sequences in a 1T MR unit. The results were compared in tables and demonstrated by figures. RESULTS - The plastic container and cups made it possible to evaluate the contrast materials by MR examination. The fruit juices containing metallic components had high signal intensity on T1 weighted images, while on the T2 weighted images showed moderate to high signal intensity except the rosehip syrup and a special blackcurrant extract, which were of low signal intensity. Cocoa drink had low to moderate signal intensity on both the T1 and T2 weighted images. The signal intensity of the iron(III)-desferrioxamin solution increased on the T1 weighted images and decreased on the T2 weighted images in direct proportion to its iron concentration. CONCLUSION - The described in vitro model is an appropriate and risk-free solution for selecting the proper endoluminal contrast material, its concentration, and the best measuring sequences for defining the optimal in vivo MR bowel examination protocol. On the base of the experimental results rosehip syrup, blackcurrant extract, iron(III)- desferrioxamin and cocoa drink were selected for further in vitro and in vivo examinations.]

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[Errors and Mistakes]

LACZAY András

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[Croatian-Hungarian-Slovenian Radiology Symposium October 2003]

BARTA Miklós

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