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Featured researches published by E. Ambrus.


Clinical Nuclear Medicine | 2002

The possible role of F-18 FDG positron emission tomography in the differential diagnosis of focal pancreatic lesions

Miklós Papós; Tamás Takács; Lajos Trón; Gyula Farkas; E. Ambrus; Szabolcs Szakáll; J. Lonovics; L. Csernay; László Pávics

Purpose To compare the diagnostic values of different methods for the differentiation of malignant from benign pancreatic lesions. Methods In 22 patients with focal pancreatic lesions, the carbohydrate antigen (CA) 19-9 level was measured; abdominal ultrasound (US), computed tomography (CT), endoscopic retrograde cholangiopancreatography (ERCP), and F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET) were performed; and the value of these methods were analyzed for their use in cancer diagnosis. Results Malignant lesions were identified in six patients and verified by surgery or clinical follow-up. The CA 19-9 level was elevated in four of the five patients examined (sensitivity, 80%). In all six cases, US and CT revealed hypoechogenic and hypodense areas (sensitivity, 100%). In one patient, ERCP was unsuccessful but yielded true-positive results in three others (sensitivity, 60%). The sensitivity of FDG PET was 100%. Sixteen focal cases of pancreatic disease proved to be benign. The CA 19-9 level was elevated in four of them (specificity, 73%). Hypoechogenic and hypodense areas were evident on US and CT in eight patients. The specificity of CT was 50% (8 of 16 cases). The specificity of US was 47% (7 of 15 cases). The specificity of successful ERCP was 92%. Fourteen negative FDG-PET results were truly negative. In two patients, however, the PET findings proved to be falsely positive (specificity, 88%). Conclusions FDG-PET is an effective tool to differentiate malignant from benign focal pancreatic lesions. In persons with focal pancreatic hypoechogenic or hypodense lesions detected by CT or US and an elevated CA 19-9 level, FDG PET should be the next step in the diagnostic strategy.


The American Journal of Gastroenterology | 2001

Clinical value of technetium-99m-HMPAO-labeled leukocyte scintigraphy and spiral computed tomography in active Crohn's disease

Tamás Molnár; Miklós Papós; Csaba Gyulai; E. Ambrus; Lilla Kardos; Ferenc Nagy; András Palkó; László Pávics; J. Lonovics

Clinical value of technetium-99m-HMPAO-labeled leukocyte scintigraphy and spiral computed tomography in active crohns disease


Anticancer Research | 1997

Value of 99m-Tc MIBI and 99m-Tc(V) DMSA scintigraphy in evaluation of breast mass lesions

E. Ambrus; Mária Rajtár; Katalin Ormándi; Terez Sera; Anna Tószegi; Jenö Láng; László Pávics; L. Csernay


Nuklearmedizin-nuclear Medicine | 1994

Evaluation of Cerebral Vasoreactivity by SPECT and Transcranial Doppler Sonography using the Acetazolamide Test

László Pávics; F. Grünwald; P. Barzö; E. Ambrus; C. Menzel; A. Schomburg; L. Borda; Eörs Máté; M. Bodosi; L. Csernay; H. J. Biersack


Nuclear Medicine Review | 1998

rCBF SPECT and the acetazolamide test in the evaluation of dementia.

Laszlo Pavics; Frank Grünwald; Karl Reichmann; Terez Sera; E. Ambrus; Rolf Horn; Alexander Hartmann; Christian Menzel; L. Csernay; Hans J. Biersack


Orvosi Hetilap | 1998

99MTC-MIBI MAMMOSZCINTIGRAFIA SZEREPE AZ EMLODAGANATOK DIAGNOSZTIKAJABAN

E. Ambrus; K. Ormándi; Terez Sera; Anna Tószegi; L. Csernay; László Pávics


Orvosi Hetilap | 2002

Az FDG-PET-vizsgálat értéke a pancreascarcinoma diagnosztikájában.

Miklós Papós; Tamás Takács; László Pávics; Gyula Farkas; E. Ambrus; Szabolcs Szakáll; J. Lonovics; L. Csernay; Lajos Trón


Nuclear Medicine Review | 2004

The prognostic value of dopamine receptor occupancy by [123I]IBZM-SPECT in schizophrenic patients treated with quetiapine.

László Pávics; G. Szekeres; E. Ambrus; Szabolcs Kéri; Zoltán Kovács; Miklós Árgyelán; Balázs Kanyó; L. Csernay; Zoltán Janka


Ideggyogyaszati Szemle-clinical Neuroscience | 2009

99-MTC-HMPAO single photon emission computed tomography examinations in genetically determined neurometabolic disorders

Aranka László; E. Ambrus; Erika Vörös; András Svékus; Jenö Kóbor; Edit Bereg; János Palatka; László Pávics


Orvosi Hetilap | 1999

Regional cerebral blood flow changes in schizophrenic patients detected by SPECT studies under resting and active conditions

E. Ambrus; G. Szekeres; Szabolcs Kéri; L. Csernay; Zoltán Janka; László Pávics

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Lajos Trón

University of Debrecen

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Szabolcs Kéri

Budapest University of Technology and Economics

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