Electrical - Electronic Engineering / Elektrik - Elektronik Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/11

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Language: search.filters.language.enPublisher: search.filters.publisher.IOP Publishing Ltd.

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  • Article
    Citation - WoS: 4
    Citation - Scopus: 4
    Modeling and Simulation of Positron Emission Mammography (pem) Based on Double-Sided Cdte Strip Detectors
    (IOP Publishing Ltd., 2014) Özşahin, İlker; Ünlü, Mehmet Zübeyir
    Breast cancer is the most common leading cause of cancer death among women. Positron Emission Tomography (PET) Mammography, also known as Positron Emission Mammography (PEM), is a method for imaging primary breast cancer. Over the past few years, PEMs based on scintillation crystals dramatically increased their importance in diagnosis and treatment of early stage breast cancer. However, these detectors have significant limitations like poor energy resolution resulting with false-negative result (missed cancer), and false-positive result which leads to suspecting cancer and suggests an unnecessary biopsy. In this work, a PEM scanner based on CdTe strip detectors is simulated via the Monte Carlo method and evaluated in terms of its spatial resolution, sensitivity, and image quality. The spatial resolution is found to be ∼ 1 mm in all three directions. The results also show that CdTe strip detectors based PEM scanner can produce high resolution images for early diagnosis of breast cancer.
  • Article
    Citation - WoS: 23
    A Quasi-Distributed Temperature Sensor Interrogated by Optical Frequency-Domain Reflectometer
    (IOP Publishing Ltd., 2011) Yüksel, Kıvılcım; Mégret, Patrice; Wuilpart, Marc
    This paper presents the analysis of a quasi-distributed sensor based on the concatenation of identical low-reflective fiber Bragg gratings. We experimentally demonstrated a temperature sensor using ten cascaded gratings which are interrogated by an optical frequency domain reflectometer. Repeatability measurements highlighted a standard deviation on the measured temperature smaller than 1.5 °C. A complete demonstration of mathematical formulas which are used to obtain the temperature information is also provided. © 2011 IOP Publishing Ltd.