1. Direct reconstruction of wet foam from sparse-view, dynamic X-ray CT scansJens Renders, Lucia Mancini, Jan De Beenhouwer, Jan Sijbers, 2024, izvirni znanstveni članek Povzetek: X-ray imaging of wet foam dynamics with a high temporal resolution (e.g., 3D videos with a 10 Hz frame rate) requires fast rotation of either the foam sample or the X-ray gantry. This, however, strongly limits the number of X-ray projections per rotation that can be acquired. As a result, conventional computed tomography reconstruction methods generate 3D images with severe undersampling artefacts, complicating subsequent foam analysis. Herein, BubSub, a novel tomographic reconstruction approach that reconstructs a 4D (3D plus time) dynamic image of wet foam bubbles from sparse-view X-ray projections by leveraging prior knowledge about the evolving foam structure, is introduced. BubSub adapts a collection of subdivision surfaces with spherical topology to represent liquid–gas interfaces of foam bubbles. Estimation of bubble positions and shapes at each time point is achieved by minimizing the projection distance in relation to the measured projections. BubSub operates efficiently with minimal memory usage, exhibits robustness against noise, and provides accurate reconstructions, even when the available projections are limited, as evidenced by various experiments using both simulated and real wet foam X-ray data.
Ključne besede: redki pogledi, dinamika pene, rentgenska mikrotomografija, tomografska rekonstrukcija, sparse views, foam dynamics, X-ray microtomography, tomographic reconstruction
Objavljeno v DiRROS: 16.12.2024; Ogledov: 1249; Prenosov: 1166
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2. Does concurrent gynaecological surgery affect infectious complications rate after mastectomy with implant-based reconstruction?Nina Pišlar, Barbara Perić, Uroš Ahčan, Romi Cencelj-Arnež, Janez Žgajnar, Andraž Perhavec, 2023, izvirni znanstveni članek Povzetek: Background. Women who undergo breast cancer surgery often have an indication for gynaecological procedure. The aim of our study was to compare infectious complications rate after mastectomy with implant-based reconstruc-tion in patients with and without concurrent gynaecological procedure.Patients and methods. We retrospectively reviewed clinical records of 159 consecutively operated patients after mastectomy with implant-based reconstruction. The patients were divided in 2 groups: 102 patients without (Group 1) and 57 with (Group 2) concurrent gynaecological procedure. Infectious complications rates between the groups were compared using χ2-test. Logistic regression was performed to test for association of different variables with infec-tious complications.Results. There were240 breast reconstructions performed. Median follow-up time was 297 days (10–1061 days). Mean patient age was 47.2 years (95% CI 32.8–65.9); 48.2 years (95% CI 46.1–50.3) in Group 1 and 45.8 years (95% CI 43.2–48.3) in Group 2; p = 0.002). Infectious complications rate was 17.6% (17.6% vs. 17.5%, p = 0.987), implant loss occurred in 5.7% (4.9% vs. 7.0%, p = 0.58). Obesity (body mass index[BMI] > 30 kg/m2), age, previous breast conserv-ing treatment (BCT) with radiotherapy (RT) were identified as risk factors for infectious complications in univariate analysis. Obesity (adjusted odds ratio [aOR] 3.319, 95% CI 1.085–10.157, p = 0.036) and BCT with RT (aOR 7.481, 95% CI 2.230–25.101, p = 0.001) were independently associated with infectious complications in multivariate model.Conclusions. Concurrent gynaecological procedure for patients undergoing mastectomy with implant-based re-construction did not carry an increased risk for infectious complications.
Ključne besede: rak na dojki, infekcijski zapleti, rekonstrukcija z vsadki
Objavljeno v DiRROS: 25.07.2024; Ogledov: 946; Prenosov: 543
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8. Rak zunanjega spolovila : zbornik znanstvenih prispevkov2017, zbornik recenziranih znanstvenih prispevkov na domači konferenci Ključne besede: epidemiologija, simptomi, diagnostika, zdravljenje, patološka histologija, kirurško zdravljenje, rekonstrukcija, radioterapija, rehabilitacija, zborniki
Objavljeno v DiRROS: 08.04.2020; Ogledov: 2836; Prenosov: 990
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10. Pacientke z rakom dojk - trendi in novosti2013, zbornik strokovnih ali nerecenziranih znanstvenih prispevkov na konferenci Ključne besede: dejavniki tveganja, dedne bolezni, genetsko svetovanje, presejanje, mastektomija, rekonstrukcija, fizioterapija, radioterapija, sistemsko zdravljenje, telesna aktivnost, paliativna oskrba, zborniki
Objavljeno v DiRROS: 13.01.2020; Ogledov: 3851; Prenosov: 1127
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