Browsing by Author "Erol, Hasan Sabri Melihcan"

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Open Access
Fusion of overlapping patches in X-Space MPI
(Infinite Science Publishing, 2020) Erol, Hasan Sabri Melihcan; Özaslan, Ali Alper; Sarıtaş, Emine Ülkü
In x-space reconstruction of magnetic particle imaging (MPI), the information lost due to filtering for trajectories with 1D drive fields (DF) was shown to be a DC term, which can be recovered by enforcing image non-negativity and smoothness. However, for trajectories with multi-dimensional DFs, such as the Lissajous trajectory, the loss is no longer constant throughout a patch. In this work, we present a fusion method for overlapping patches in x-space reconstruction. This method first compensates for image loss due to filtering, followed by a fusion that places a higher emphasis on the patch where the Lissajous trajectory had a closer-to-orthogonal intersection, ensuring near-isotropic effective point spread function (PSF) throughout the fused image.
Restricted
Kıbrıs harekâtına harekat komutanlarından emekli korgeneral Recai Öztürk'ün tanıklıkları üzerinden bakış
(Bilkent University, 2018) Yeşiloğlu, Rıdvan; Tınaz, Berk; Kaya, Mehmet Artun; Erol, Hasan Sabri Melihcan; Demir, Hikmet
Open Access
X-space image reconstruction for lissajous trajectory using multidimensional image tensor
(Infinite Science Publishing, 2023-03-19) Ömeroglu, Osmanalp; Erol, Hasan Sabri Melihcan; Özaslan, Ali Alper; Sarıtaş, Emine Ülkü
The tensor-based theory of multidimensional x-space MPI provides useful insight into MPI image reconstruction. Using this theory, it was shown that x-space MPI images with isotropic resolution can be achieved by scanning in two orthogonal directions separately and combining the resulting images. In this work, we propose an x-space image reconstruction that resolves the multidimensional image tensor, allowing us to reconstruct the isotropic MPI image for the Lissajous trajectory. The proposed method takes advantage of the self-crossing property of the Lissajous trajectory.