Abstract
Aim: In patients with lesions of the liver we compared diagnoses based on different methods
of ultrasound as well as spiral CT with the final diagnosis reached at the time of
the patient's discharge from hospital. Method: From records of a prospective multicentre study including 90 liver lesions investigated
with B-mode baseline and conventional colour/power Doppler ultrasound, contrast-enhanced
colour/power Doppler ultrasound and spiral-CT, we evaluated only those where diagnoses
for all modalities were available, and where the diagnosis at discharge comprising
all clinical, laboratory and imaging data as well as histologic proof was at least
“highly probable”. Results: 60 lesions met the inclusion criteria. 20 lesions were ultimately diagnosed as benign,
and 40 as malignant. With respect to the diagnosis of malignancy, sensitivity was
92.5 % (37/40) with B-mode and unenhanced conventional colour/power Doppler US ultrasound,
97.5 % (39/40) with contrast-enhanced colour/ power Doppler ultrasound, and 100 %
with CT; the corresponding specificities were 65 % (13/20), 85 % (17/20) and 80 %
(16/20). 4 of 7 false positive, and 2 of 3 false negative results in the unenhanced
technique were diagnosed correctly with contrast-enhanced Doppler ultrasound. Conclusion: Compared to conventional ultrasound, contrast-enhanced Doppler ultrasound improved
the diagnostic accuracy in 10 % of the cases. Its accuracy in our study was equal
to that of CT.
Zusammenfassung
Studienziel: Es wurden Diagnosen von Leberläsionen mittels B-Mode und konventionellem Colour/Power
Doppler Ultraschall, kontrast-verstärktem Doppler Ultraschall sowie Spiral-CT gestellt
und mit den Entlassungsdiagnosen verglichen. Methode: In einer prospektiven Multicenter-Studie wurden 90 Lebertumoren mittels B-Mode, konventionellem
Colour/Power Doppler Ultraschall und kontrast-verstärktem Colour/Power Doppler US
sowie Spiral-CT untersucht. Aus den Studienprotokollen wurden die Läsionen ausgewertet,
bei denen eine Diagnose in allen Modalitäten gestellt war und eine Entlassungsdiagnose
basierend auf klinischen-, laborchemischen Daten, zusätzlichen Bildgebungsverfahren
einschließlich histologischer Untersuchung vorlag und als ”highly probable” eingestuft
war. Ergebnisse: Die Einschlusskriterien erfüllten 60 Lebertumoren. Endgültig wurden 20 Läsionen als
benigne und 40 als maligne diagnostiziert. Die Sensitivität bezüglich der Diagnose
„Malignität” betrug 92,5 % (37/40) für B-Mode und Colour/Power Doppler Ultraschall,
97,5 % (39/40) für kontrast-verstärkten Doppler Ultraschall, und 100 % für CT; die
entsprechenden Spezifitäten betrugen 65 % (13/20), 85 % (17/20) und 80 % (16/20).
4 von 7 falsch positiv und 2 von 3 falsch negativ eingestuften Läsionen (konventionelle
Technik) wurden korrekt im kontrast-verstärkten Doppler Ultraschall klassifiziert.
Schlussfolgerung: In unserer Studie verbesserte der kontrast-verstärkte Doppler Ultraschall im Vergleich
zum konventionellen US die diagnostische Genauigkeit in 10 % der Fälle - diese war
somit identisch mit der der CT.
Key words
Ultrasound (US) - Liver neoplasms - Doppler studies - US contrast media
Schlüsselwörter
Ultraschall (US) - Lebertumoren - Doppler Studien - US Kontrastmittel
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M. Beissert, MD
Institut für Röntgendiagnostik der Universität Würzburg
Josef-Schneider-Straße 2 · 97080 Würzburg · Germany ·
Phone: +49-931-201-34130
Fax: +49-931-201-34521
Email: beissert@roentgen.uni-wuerzburg.de