TWO-STAGE MULTIDETECTOR CT-ANGIOGRAPHY OF RENAL TUMORS

Česká verzia

Authors: doc. MUDr. Jiří Ferda, Ph.D. ¹; doc. MUDr. Milan Hora, Ph.D. ²; doc. MUDr. Ondřej Hes, Ph.D. ³; MUDr. Hynek Mírka ¹; MUDr. Eva Ferdová ¹; MUDr. Kristýna Ohlídalová ¹
Authors place of work: Radiodiagnostická klinikaLF UK a FN Plzeň ¹; Urologická klinika LF UK a FN Plzeň ²; Šiklův ústav patologické anatomie, LF UK a FN Plzeň ³
Published in the journal: Urol List 2006; 4(2): 32-35

Summary

Multidetector computer tomography (MDCT), which has been used since the end of 1990s, is based on the principle of dividing the detector band into several parallel series that give rise to several data traces at the same time. The width of individual parallel series ranges from 0.6 mm to 2.5 mm and the number of active series is 4 to 64. The resulting data set considerably improves resolution in the Z axis, which is equivalent to the width of the detector array used. On using a sub-millimeter detector system an up to 0.4 mm resolution can be achieved. Another advantage is a marked shortening of the time of examination (data acquisition takes 5 to 20 s) while the given resolution level is maintained. This examination mode is suitable for tumor staging, imaging of the renal inlet vessels, and its results can be used for planning the surgical intervention, especially a laparoscopic one. The authors describe the methodology of data acquisition, their reconstruction and evaluation, and the results obtained in the course of a 4-year use of MDCT at their clinic. They enumerate the advantages of MDCT as compared with other examination techniques and state that two-phase MDCT renal angiography represents currently an optimum method for renal tumor staging and can fully replace digital subtraction angiography.

KEY WORDS:
renal tumors multidetector computer tomography, CT-angiography

Zdroje

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