Tasevski, Goce

Preferred name
Tasevski, Goce
Official Name
Tasevski, Goce
Main Affiliation
Email
goce.tasevski@mf.edu.mk

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    Item type:Publication,
    Experimental Measurements of System Dynamics Between Two Stages of Wire Drawing Machine
    (Walter de Gruyter GmbH, 2015-03-01)
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    Shishkovski, Dejan
    <jats:title>Abstract</jats:title> <jats:p>In multi-stage wire drawing machines productivity growth can be achieved at higher drawing speeds by preventing wire breakage during the process. One disadvantage of high-speed wire drawing is the requirement imposed by machine dynamics in terms of its stability and reliability during operation. Tensile forces in the wire must maintained by fast synchronization of all capstans speed. In this process, the displacement sensors play the main role in providing the control system with feedback information about the wire condition. In this study, the influences between the sensors and actuator driven capstans have been studied, and tuner roll concept of a wire drawing machine was experimentally investigated. To this aim, measurements were carried out on two drawing stages at different drawing speeds and obtained results were presented. These results clearly show the fast changes of the capstans speed and the angular displacements of the rollers that tighten the wire, which only confirms the high dynamics of the wire drawing machine.</jats:p>
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    DEDICATED HEAD AND NECK 18F-FDG PET/CT PROTOCOL IN DETECTING CERVICAL LYMPH NODE METASTASIS
    (2022)
    Todorova-Stefanovski, Dushica
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    Beshliev,Simon
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    Angjeleska, Meri
    PURPOSE: The purpose of this study is to compare dedicated head and neck PET/CT protocol to standard torso PET/CT protocol in detecting cervical lymph node metastasis in patients with head and neck cancer. MATERIALS AND METHODS: Retrospective study consisted of patients with head and neck cancer who underwent 18F-FDG PET-CT examination in the last six months in our institution after chemo or/and radiotherapy. All of the PET/CT examination consisted of dedicated head and neck scanning (cranial base to the thoracic inlet in an arm-down position, three bed positions - 3 min per bed position), followed by standard torso scanning (skull base through the proximal thighs with arms in a raised position - 2 min per bed position). CT scan parameters were identical in both scanning: 120 kVp, 30 mAs (reference, Siemens CareDose), 5 mm slice thickness and FOV of 50 cm. FDG uptake was evaluated visually and number of lesions were compared. RESULTS: 30 patients (21 men, 9 women; age range, 23-72 years) underwent 18- FDG PET-CT. In 9 patients (9/30, 30%) increased metabolic activity was detected in lymph nodes suggestive of metastasis. 26 metastasis were detected using dedicated head and neck scanning, compared to 23 with standard torso scanning (26 vs 23). Only in two patients (2/30, 6%).additional lessions was seen with the dedicated head and neck scanning. CONCLUSION: Dedicated head and neck scanning helped us detect additional lesions in only 6% of the patients and consequently did not influenced the treatment plan.