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PET-CT images were reconstructed using our clinical routine reconstruction parameters: ordered subsets expectation maximisation (OSEM) with 2 iterations, 21 subsets, and a 4.3 mm Gaussian post-filter.
Our aim was to use the deep circumflex iliac artery (DCIA) flap together with a costochondral graft as a safe and reliable bone flap for routine reconstruction of the mandibular body and the temporomandibular joint (TMJ).
Borrowing from experience with multidetector CT imaging of acute gynaecological diseases, also in the postoperative setting, routine reconstruction of 3 4-mm-thick contiguous images along sagittal and coronal planes is beneficial to elucidate the female pelvic anatomy [19, 20, 21].
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In the presence of calcifications, routine reconstructions of an additional dataset with a sharper tissue convolution kernel and at bone window settings (window width around 1,400 HU, window center around 500 HU) help in reducing blooming artefacts from calcifications.
In addition to reviewing axial images, we recommend routine image reconstruction and study interpretation along the sagittal orientation, which provides the best visualization of the anterior abdominal wall [5, 8, 18].
Although the preoperative CT with routine arterial reconstruction had shown normal CA anatomy and no evidence of MALS, a postoperative scan 1 day after the PD that included a lateral projection of the CA showed an acute extrinsic stenosis caused by newly developed compression caused by the median arcuate ligament.
A Fast-kVp Switching (FKS) dual-energy and a routine adaptative iterative reconstruction (Adaptative Statistical Iterative Reconstruction, ASIR, GE Healthcare®) single-energy abdominal Computed Tomography (CT) protocols have been designed for hepatocellular carcinomas detection.
Images were corrected for dead-time and randoms and reconstructed by the routine OSEM2D (2-Dimensional Reconstruction) algorithm provided by the manufacturer.
To instead reduce the I/O load and for highest speed, the gridrec C code compiled as shared library is loaded from Python, so that the sinograms can be delivered to the reconstruction routine directly from memory.
The natural workflow will include near-field (Fresnel) phase reconstruction routines coupled to tomographic reconstruction.
Currently, there are three distinct groups of tomographic reconstruction routines implemented at the Lunarc GPU cluster.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com