Péter Ágoston

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PURPOSE To report the 7-year results of a prospective study of accelerated partial breast irradiation (APBI) using interstitial high-dose-rate brachytherapy and compare the treatment results with those achieved by standard, whole breast radiotherapy (WBRT), with or without a tumor bed boost (TBB). METHODS AND MATERIALS Between 1996 and 1998, 45(More)
UNLABELLED Postsurgically elevated or increasing serum calcitonin levels strongly suggest the presence of residual or recurrent medullary thyroid carcinoma (MTC). Several imaging modalities (sonography, MRI, CT, scintigraphy with different types of radiolabeled ligands, etc.) are routinely used in an attempt to localize tumorous tissue, but such efforts(More)
The purpose of the study was to examine if the CT densitometric analysis during radiotherapy (RT) of brain tumors is suitable for the early detection of RT induced brain edema (BE), predicting related neurological progress, and assessing the effects of different edema therapies. Planimetric CT-densitograms were constructed by modifying the "High-Lighting"(More)
BACKGROUND AND PURPOSE Recently, the use of brachytherapy for partial breast irradiation has increased significantly. The aim of this study was to make dosimetric comparisons between conventional (CONV) and CT-based optimized dosimetry systems applied to breast implants. PATIENTS AND METHODS 17 patients treated with high-dose-rate (HDR) interstitial(More)
PURPOSE To analyze the clinical outcome and toxicity data of the first 100 consecutive patients treated with a single-fraction high-dose-rate brachytherapy (HDR-BT) and external beam radiotherapy (EBRT). METHODS AND MATERIALS Two-hundred eighty patients have been treated with HDR-BT boost for localized intermediate- to high-risk prostate cancer. Among(More)
OBJECTIVE To investigate the pathomechanism of the rare radiogenic lower motor neurone disease (LMND) on the basis of a case history involving a partial functional recovery. PATIENT A 31-year-old seminoma patient received postoperative para-aortic and para-iliac telecobalt irradiation with a biologically effective dose of 88 Gy(2) (44 Gy in 2 Gy(More)
Soft tissue sarcomas are rare tumors, composing 1% of all malignancies. Fifteen percent of them are situated in the retroperitoneal region. The primary curative treatment for this group of patients is complete surgical resection. In most cases, due to their large size and localization at diagnoses, complete resection (R0) is not feasible. The main cause of(More)
PURPOSE Quantitative evaluation of dose distributions of high-dose-rate prostate implants in order to make a later comparison with clinical outcome. MATERIAL AND METHODS Treatment plans of 169 implants for 161 patients were evaluated using dose-volume histograms. The planning was based on transrectal US imaging and 10 Gy (100%) dose was prescribed to the(More)
The aim of this study is to evaluate the effect of the number of needles on the quality of dose distributions in high-dose-rate (HDR) prostate implants regarding target coverage, dose homogeneity and dose to organs at risk. Treatment plans of 174 implants were evaluated using cumulative dose-volume histograms. The plans were divided into three groups(More)
PURPOSE To quantitatively evaluate the dose distributions of high-dose-rate (HDR) prostate implants regarding target coverage, dose homogeneity, and dose to organs at risk. MATERIAL AND METHODS Treatment plans of 174 implants were evaluated using cumulative dose-volume histograms (DVHs). The planning was based on transrectal ultrasound (US) imaging, and(More)