2 research outputs found

    Detection of the arterial input function using DSC-MRI data

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    Accurate detection of arterial input function is a crucial step in obtaining perfusion hemodynamic parameters using dynamic susceptibility contrast-enhanced magnetic resonance imaging. It is required as input for perfusion quantification and has a great impact on the result of the deconvolution operation. To improve the reproducibility and reliability of arterial input function detection, several semi- or fully automatic methods have been proposed. This study provides an overview of the current state of the field of arterial input function detection. Methods most commonly used for semi- and fully automatic arterial input function detection are reviewed, and their advantages and disadvantages are listed

    ГСнСрація синтСтичних ΠΌΠ΅Π΄ΠΈΡ‡Π½ΠΈΡ… Π΄Π°Π½ΠΈΡ… Π·Π° допомогою MDR-Π°Π½Π°Π»Ρ–Π·Ρƒ

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    ΠœΠ΅Ρ‚Π°: ΠœΠ΅Ρ‚ΠΎΡŽ Π΄Π°Π½ΠΎΡ— статті Ρ” викладСння Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΡƒ Π³Π΅Π½Π΅Ρ€Π°Ρ†Ρ–Ρ— синтСтичних ΠΌΠ΅Π΄ΠΈΡ‡Π½ΠΈΡ… Π΄Π°Π½ΠΈΡ… для Ρ‚ΠΎΠ³ΠΎ, Ρ‰ΠΎΠ± Π΄ΠΎΠΏΠΎΠ²Π½ΠΈΡ‚ΠΈ ΠΌΠ°Π»Π΅Π½ΡŒΠΊΡ– Π²ΠΈΠ±Ρ–Ρ€ΠΊΠΈ Π΄Π°Π½ΠΈΡ…. ΠœΠ΅Ρ‚ΠΎΠ΄ΠΈ: Для досягнСння ΠΌΠ΅Ρ‚ΠΈ дослідТСння Π±ΡƒΠ»ΠΈ використані Ρ‚Π°ΠΊΡ– ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΈ, як: корСляційний Π°Π½Π°Π»Ρ–Π· (для виявлСння Π·Π½Π°Ρ‡ΠΈΠΌΠΈΡ… Π·ΠΌΡ–Π½Π½ΠΈΡ… Ρ‚Π° взаємозв’язків ΠΌΡ–ΠΆ Π½ΠΈΠΌΠΈ), MDR-Π°Π½Π°Π»Ρ–Π· (для ΠΏΠΎΠ±ΡƒΠ΄ΠΎΠ²ΠΈ Π»ΠΎΠ³Ρ–Ρ‡Π½ΠΈΡ… Π»Π°Π½Ρ†ΡŽΠ³Ρ–Π² зв’язку ΠΌΡ–ΠΆ ΠΌΠ΅Π΄ΠΈΡ‡Π½ΠΈΠΌΠΈ Π΄Π°Π½ΠΈΠΌΠΈ) Ρ‚Π° рСгрСсійний Π°Π½Π°Π»Ρ–Π· (для модСлювання Π·ΠΌΡ–Π½Π½ΠΈΡ… ΠΌΠ΅Π΄ΠΈΡ‡Π½ΠΈΡ… Π΄Π°Π½ΠΈΡ…, Ρ‰ΠΎΠ± використати Ρ†Π΅ для Π³Π΅Π½Π΅Ρ€Π°Ρ†Ρ–Ρ— синтСтичних Π΄Π°Π½ΠΈΡ…). Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΈ: Π‘ΡƒΠ»Π° використана Π±Π°Π·Π° Π΄Π°Π½ΠΈΡ… ΠΏΠ°Ρ†Ρ–Ρ”Π½Ρ‚Ρ–Π² Π· ΡΠ΅Ρ€Ρ†Π΅Π²ΠΎΡŽ Π½Π΅Π΄ΠΎΡΡ‚Π°Ρ‚Π½Ρ–ΡΡ‚ΡŽ, яка доступна Ρƒ Π²Ρ–Π΄ΠΊΡ€ΠΈΡ‚ΠΎΠΌΡƒ доступі, Ρ‰ΠΎΠ± ΠΏΠ΅Ρ€Π΅Π²Ρ–Ρ€ΠΈΡ‚ΠΈ Ρ€ΠΎΠ·Ρ€ΠΎΠ±Π»Π΅Π½ΠΈΠΉ Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌ Π³Π΅Π½Π΅Ρ€Π°Ρ†Ρ–Ρ— синтСтичних ΠΌΠ΅Π΄ΠΈΡ‡Π½ΠΈΡ… Π΄Π°Π½ΠΈΡ… Ρƒ Π΄Ρ–ΠΉ; Π² Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ– Π±ΡƒΠ»ΠΈ Π·Π½Π°ΠΉΠ΄Π΅Π½Ρ– статистичні взаємозв’язки ΠΌΡ–ΠΆ Π΄Π°Π½ΠΈΠΌΠΈ, які Π²ΠΈΠΊΠΎΡ€ΠΈΡΡ‚ΠΎΠ²ΡƒΠ²Π°Π»ΠΈΡΡŒ для ΠΏΠΎΠ±ΡƒΠ΄ΠΎΠ²ΠΈ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ Π»Ρ–Π½Ρ–ΠΉΠ½ΠΎΡ— рСгрСсії. ΠžΠ±Π³ΠΎΠ²ΠΎΡ€Π΅Π½Π½Ρ: Π—Π°ΠΏΡ€ΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½ΠΈΠΉ Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌ дозволяє Π·Π° допомогою Π΄Π΅ΠΊΡ–Π»ΡŒΠΊΠΎΡ… простих, Π°Π»Π΅ Π² Ρ‚ΠΎΠΉ час Π²Π°ΠΆΠ»ΠΈΠ²ΠΈΡ… Π΄Ρ–ΠΉ Π²ΠΈΠΊΠΎΠ½Π°Ρ‚ΠΈ Π³Π΅Π½Π΅Ρ€Π°Ρ†Ρ–ΡŽ ΠΌΠ΅Π΄ΠΈΡ‡Π½ΠΈΡ… Π΄Π°Π½ΠΈΡ…, Ρ‰ΠΎ Π΄Π°Ρ” ΠΌΠΎΠΆΠ»ΠΈΠ²Ρ–ΡΡ‚ΡŒ ΠΎΡ‚Ρ€ΠΈΠΌΠ°Ρ‚ΠΈ Π²Π΅Π»ΠΈΠΊΡ– масиви Π΄Π°Π½ΠΈΡ…, які ΠΌΠΎΠΆΠ½Π° використовувати для Ρ€Π΅Π°Π»Ρ–Π·Π°Ρ†Ρ–Ρ— ΠΌΠ΅Ρ‚ΠΎΠ΄Ρ–Π² машинного навчання Ρƒ Π±ΡƒΠ΄ΡŒ-яких Π·Π°Π΄Π°Ρ‡Π°Ρ… пов’язаних Π· ΠΌΠ΅Π΄ΠΈΡ†ΠΈΠ½ΠΎΡŽ.Purpose: The purpose of this article is to outline an algorithm for generating synthetic medical data in order to augment small samples of data. Methods: To achieve the research goal, methods such as: correlation analysis (to identify significant variables and the relationships between them), MDR analysis (to build logical chains of relationships between medical data), and regression analysis (to model medical data variables to use this to generate synthetic data) were used. Results: A database of heart failure patients that is publicly available was used to test the developed algorithm for generating synthetic medical data in action; as a result, statistical relationships between data were found and used to build linear regression models. Discussion: The proposed algorithm allows, with a few simple, yet important actions, to perform the generation of medical data, which makes it possible to obtain large data sets that can be used to implement machine learning methods in any tasks related to medicine
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