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Bomberna T, Vermijs S, Bonne L, Verslype C, Maleux G, Debbaut C. Spatiotemporal Analysis of Particle Spread to Assess the Hybrid Particle-Flow CFD Model of Radioembolization of HCC Tumors. IEEE Trans Biomed Eng 2024; 71:1219-1227. [PMID: 37938948 DOI: 10.1109/tbme.2023.3331085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
OBJECTIVE Computational fluid dynamics (CFD) models can potentially aid in pre-operative planning of transarterial radioactive microparticle injections to treat hepatocellular carcinoma, but these models are computationally very costly. Previously, we introduced the hybrid particle-flow model as a surrogate, less costly modelling approach for the full particle distribution in truncated hepatic arterial trees. We hypothesized that higher cross-sectional particle spread could increase the match between flow and particle distribution. Here, we investigate whether truncation is still reliable for selective injection scenarios, and if spread is an important factor to consider for reliable truncation. METHODS Moderate and severe up- and downstream truncation for selective injection served as input for the hybrid model to compare downstream particle distributions with non-truncated models. In each simulation, particle cross-sectional spread was quantified for 5-6 planes. RESULTS Severe truncation gave maximum differences in particle distribution of ∼4-11% and ∼8-9% for down- and upstream truncation, respectively. For moderate truncation, these differences were only ∼1-1.5% and ∼0.5-2%. Considering all particles, spread increased downstream of the tip to 80-90%. However, spread was found to be much lower at specific timepoints, indicating high time-dependency. CONCLUSION Combining domain truncation with hybrid particle-flow modelling is an effective method to reduce computational complexity, but moderate truncation is more reliable than severe truncation. Time-dependent spread measures show where differences might arise between flow and particle modelling. SIGNIFICANCE The hybrid particle-flow model cuts down computational time significantly by reducing the physical domain, paving the way towards future clinical applications.
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De Backer P, Vangeneugden J, Berquin C, Vermijs S, Dekuyper P, Mottrie A, Debbaut C, Quackels T, Van Praet C, Decaestecker K. Robot-assisted Partial Nephrectomy Using Intra-arterial Renal Hypothermia for Highly Complex Endophytic or Hilar Tumors: Case Series and Description of Surgical Technique. EUR UROL SUPPL 2023; 58:19-27. [PMID: 38028235 PMCID: PMC10660005 DOI: 10.1016/j.euros.2023.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/16/2023] [Indexed: 12/01/2023] Open
Abstract
Background In partial nephrectomy for highly complex tumors with expected long ischemia time, renal hypothermia can be used to minimize ischemic parenchymal damage. Objective To describe our case series, surgical technique, and early outcomes for robot-assisted partial nephrectomy (RAPN) using intra-arterial cold perfusion through arteriotomy. Design setting and participants A retrospective analysis was conducted of ten patients with renal tumors (PADUA score 9-13) undergoing RAPN between March 2020 and March 2023 with intra-arterial cooling because of expected arterial clamping times longer than 25 min. Surgical procedure Multiport transperitoneal RAPN with full renal mobilization and arterial, venous, and ureteral clamping was performed. After arteriotomy and venotomy, 4°C heparinized saline is administered intravascular through a Fogarty catheter to maintain renal hypothermia while performing RAPN. Measurements Demographic data, renal function, console and ischemia times, surgical margin status, hospital stay, estimated blood loss, and complications were analyzed. Results and limitations The median warm and cold ischemia times were 4 min (interquartile range [IQR] 3-7 min) and 60 min (IQR 33-75 min), respectively. The median rewarming ischemia time was 10.5 min (IQR 6.5-23.75 min). The median pre- and postoperative estimated glomerular filtration rate values at least 1 mo after surgery were 90 ml/min (IQR 78.35-90 ml/min) and 86.9 ml/min (IQR 62.08-90 ml/min), respectively. Limitations include small cohort size and short median follow-up (13 [IQR 9.1-32.4] mo). Conclusions We demonstrate the feasibility and first case series for RAPN using intra-arterial renal hypothermia through arteriotomy. This approach broadens the scope for minimal invasive nephron-sparing surgery in highly complex renal masses. Patient summary We demonstrate a minimally invasive surgical technique that reduces kidney infarction during complex kidney tumor removal where surrounding healthy kidney tissue is spared. The technique entails arterial cold fluid irrigation, which temporarily decreases renal metabolism and allows more kidneys to be salvaged.
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Affiliation(s)
- Pieter De Backer
- Department of Urology, ERN eUROGEN Accredited Centre, Ghent University Hospital, Ghent, Belgium
- IBiTech-Biommeda, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium
- ORSI Academy, Melle, Belgium
| | - Joris Vangeneugden
- Department of Urology, ERN eUROGEN Accredited Centre, Ghent University Hospital, Ghent, Belgium
| | - Camille Berquin
- Department of Urology, ERN eUROGEN Accredited Centre, Ghent University Hospital, Ghent, Belgium
| | - Saar Vermijs
- IBiTech-Biommeda, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium
| | - Peter Dekuyper
- Department of Urology, AZ Maria Middelares Hospital, Ghent, Belgium
| | - Alexandre Mottrie
- ORSI Academy, Melle, Belgium
- Department of Urology, Onze-Lieve-Vrouwziekenhuis Hospital, Aalst, Belgium
| | - Charlotte Debbaut
- IBiTech-Biommeda, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium
| | | | - Charles Van Praet
- Department of Urology, ERN eUROGEN Accredited Centre, Ghent University Hospital, Ghent, Belgium
| | - Karel Decaestecker
- Department of Urology, ERN eUROGEN Accredited Centre, Ghent University Hospital, Ghent, Belgium
- Department of Urology, AZ Maria Middelares Hospital, Ghent, Belgium
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De Backer P, Van Praet C, Simoens J, Peraire Lores M, Creemers H, Mestdagh K, Allaeys C, Vermijs S, Piazza P, Mottaran A, Bravi CA, Paciotti M, Sarchi L, Farinha R, Puliatti S, Cisternino F, Ferraguti F, Debbaut C, De Naeyer G, Decaestecker K, Mottrie A. Improving Augmented Reality Through Deep Learning: Real-time Instrument Delineation in Robotic Renal Surgery. Eur Urol 2023:S0302-2838(23)02633-7. [PMID: 36941148 DOI: 10.1016/j.eururo.2023.02.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/25/2023] [Accepted: 02/13/2023] [Indexed: 03/23/2023]
Abstract
Several barriers prevent the integration and adoption of augmented reality (AR) in robotic renal surgery despite the increased availability of virtual three-dimensional (3D) models. Apart from correct model alignment and deformation, not all instruments are clearly visible in AR. Superimposition of a 3D model on top of the surgical stream, including the instruments, can result in a potentially hazardous surgical situation. We demonstrate real-time instrument detection during AR-guided robot-assisted partial nephrectomy and show the generalization of our algorithm to AR-guided robot-assisted kidney transplantation. We developed an algorithm using deep learning networks to detect all nonorganic items. This algorithm learned to extract this information for 65 927 manually labeled instruments on 15 100 frames. Our setup, which runs on a standalone laptop, was deployed in three different hospitals and used by four different surgeons. Instrument detection is a simple and feasible way to enhance the safety of AR-guided surgery. Future investigations should strive to optimize efficient video processing to minimize the 0.5-s delay currently experienced. General AR applications also need further optimization, including detection and tracking of organ deformation, for full clinical implementation.
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Affiliation(s)
- Pieter De Backer
- ORSI Academy, Melle, Belgium; IBiTech-Biommeda, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium; Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium; Department of Urology, ERN eUROGEN accredited centre, Ghent University Hospital, Ghent, Belgium; Cancer Research Institute Ghent, Ghent University, Ghent, Belgium.
| | - Charles Van Praet
- Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium; Department of Urology, ERN eUROGEN accredited centre, Ghent University Hospital, Ghent, Belgium
| | | | | | - Heleen Creemers
- Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Kenzo Mestdagh
- Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Charlotte Allaeys
- Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium; Department of Urology, ERN eUROGEN accredited centre, Ghent University Hospital, Ghent, Belgium
| | - Saar Vermijs
- IBiTech-Biommeda, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium; Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium; Cancer Research Institute Ghent, Ghent University, Ghent, Belgium
| | - Pietro Piazza
- ORSI Academy, Melle, Belgium; Division of Urology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Angelo Mottaran
- ORSI Academy, Melle, Belgium; Division of Urology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Carlo A Bravi
- ORSI Academy, Melle, Belgium; Department of Urology, Onze-Lieve-Vrouwziekenhuis Hospital, Aalst, Belgium; Division of Oncology/Unit of Urology, Urological Research Institute, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Marco Paciotti
- ORSI Academy, Melle, Belgium; Department of Urology, Onze-Lieve-Vrouwziekenhuis Hospital, Aalst, Belgium; Department of Urology, Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Luca Sarchi
- ORSI Academy, Melle, Belgium; Department of Urology, Onze-Lieve-Vrouwziekenhuis Hospital, Aalst, Belgium
| | - Rui Farinha
- ORSI Academy, Melle, Belgium; Department of Urology, Onze-Lieve-Vrouwziekenhuis Hospital, Aalst, Belgium
| | - Stefano Puliatti
- ORSI Academy, Melle, Belgium; Department of Urology, University of Modena and Reggio Emilia, Modena, Italy
| | - Francesco Cisternino
- Department of Sciences and Methods for Engineering, University of Modena and Reggio Emilia, Modena, Italy
| | - Federica Ferraguti
- Department of Sciences and Methods for Engineering, University of Modena and Reggio Emilia, Modena, Italy
| | - Charlotte Debbaut
- IBiTech-Biommeda, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium; Cancer Research Institute Ghent, Ghent University, Ghent, Belgium
| | - Geert De Naeyer
- Department of Urology, Onze-Lieve-Vrouwziekenhuis Hospital, Aalst, Belgium
| | - Karel Decaestecker
- Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium; Department of Urology, ERN eUROGEN accredited centre, Ghent University Hospital, Ghent, Belgium; Department of Urology, AZ Maria Middelares Hospital, Ghent, Belgium
| | - Alexandre Mottrie
- ORSI Academy, Melle, Belgium; Department of Urology, Onze-Lieve-Vrouwziekenhuis Hospital, Aalst, Belgium
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De Backer P, Vermijs S, Van Praet C, De Visschere P, Vandenbulcke S, Mottaran A, Bravi CA, Berquin C, Lambert E, Dautricourt S, Goedertier W, Mottrie A, Debbaut C, Decaestecker K. A Novel Three-dimensional Planning Tool for Selective Clamping During Partial Nephrectomy: Validation of a Perfusion Zone Algorithm. Eur Urol 2023; 83:413-421. [PMID: 36737298 DOI: 10.1016/j.eururo.2023.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 11/25/2022] [Accepted: 01/06/2023] [Indexed: 02/04/2023]
Abstract
BACKGROUND Selective clamping during robot-assisted partial nephrectomy (RAPN) requires extensive knowledge on patient-specific renal vasculature, obtained through imaging. OBJECTIVE To validate an in-house developed perfusion zone algorithm that provides patient-specific three-dimensional (3D) renal perfusion information. DESIGN, SETTING, AND PARTICIPANTS Between October 2020 and June 2022, 25 patients undergoing RAPN at Ghent University Hospital were included. Three-dimensional models, based on preoperative computed tomography (CT) scans, showed the clamped artery's ischemic zone, as calculated by the algorithm. SURGICAL PROCEDURE All patients underwent selective clamping during RAPN. Indocyanine green (ICG) was administered to visualize the true ischemic zone perioperatively. Surgery was recorded for a postoperative analysis. MEASUREMENTS The true ischemic zone of the clamped artery was compared with the ischemic zone predicted by the algorithm through two metrics: (1) total ischemic zone overlap and (2) tumor ischemic zone overlap. Six urologists assessed metric 1; metric 2 was assessed objectively by the authors. RESULTS AND LIMITATIONS In 92% of the cases, the algorithm was sufficiently accurate to plan a selective clamping strategy. Metric 1 showed an average score of 4.28 out of 5. Metric 2 showed an average score of 4.14 out of 5. A first limitation is that ICG can be evaluated only at the kidney surface. A second limitation is that mainly patients with impaired renal function are expected to benefit from this technology, but contrast-enhanced CT is required at present. CONCLUSIONS The proposed new tool demonstrated high accuracy when planning selective clamping for RAPN. A follow-up prospective study is needed to determine the tool's clinical added value. PATIENT SUMMARY In partial nephrectomy, the surgeon has no information on which specific arterial branches perfuse the kidney tumor. We developed a surgeon support system that visualizes the perfusion zones of all arteries on a three-dimensional model and indicates the correct arteries to clamp. In this study, we validate this tool.
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Affiliation(s)
- Pieter De Backer
- Department of Urology, ERN eUROGEN Accredited Centre, Ghent University Hospital, Ghent, Belgium; IBiTech-Biommeda, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium; Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent Belgium; ORSI Academy, Melle, Belgium.
| | - Saar Vermijs
- IBiTech-Biommeda, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium; Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent Belgium; Cancer Research Institute Ghent, Ghent University, Ghent, Belgium
| | - Charles Van Praet
- Department of Urology, ERN eUROGEN Accredited Centre, Ghent University Hospital, Ghent, Belgium; Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent Belgium
| | - Pieter De Visschere
- Department of Radiology and Nuclear Medicine, Ghent University Hospital, Ghent, Belgium
| | - Sarah Vandenbulcke
- IBiTech-Biommeda, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium
| | - Angelo Mottaran
- ORSI Academy, Melle, Belgium; Division of Urology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy; Department of Urology, Onze-Lieve-Vrouwziekenhuis Hospital, Aalst, Belgium
| | - Carlo A Bravi
- ORSI Academy, Melle, Belgium; Department of Urology, Onze-Lieve-Vrouwziekenhuis Hospital, Aalst, Belgium; Division of Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Camille Berquin
- Department of Urology, ERN eUROGEN Accredited Centre, Ghent University Hospital, Ghent, Belgium
| | - Edward Lambert
- Department of Urology, ERN eUROGEN Accredited Centre, Ghent University Hospital, Ghent, Belgium
| | - Stéphanie Dautricourt
- Department of Urology, ERN eUROGEN Accredited Centre, Ghent University Hospital, Ghent, Belgium
| | - Wouter Goedertier
- Department of Urology, ERN eUROGEN Accredited Centre, Ghent University Hospital, Ghent, Belgium
| | - Alexandre Mottrie
- ORSI Academy, Melle, Belgium; Department of Urology, Onze-Lieve-Vrouwziekenhuis Hospital, Aalst, Belgium
| | - Charlotte Debbaut
- IBiTech-Biommeda, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium; Cancer Research Institute Ghent, Ghent University, Ghent, Belgium
| | - Karel Decaestecker
- Department of Urology, ERN eUROGEN Accredited Centre, Ghent University Hospital, Ghent, Belgium; Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent Belgium; Department of Urology, AZ Maria Middelares Hospital, Ghent, Belgium
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Bomberna T, Vermijs S, Lejoly M, Verslype C, Bonne L, Maleux G, Debbaut C. A Hybrid Particle-Flow CFD Modeling Approach in Truncated Hepatic Arterial Trees for Liver Radioembolization: A Patient-specific Case Study. Front Bioeng Biotechnol 2022; 10:914979. [PMID: 35711632 PMCID: PMC9197434 DOI: 10.3389/fbioe.2022.914979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 05/11/2022] [Indexed: 12/17/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the most common form of primary liver cancer. At its intermediate, unresectable stage, HCC is typically treated by local injection of embolizing microspheres in the hepatic arteries to selectively damage tumor tissue. Interestingly, computational fluid dynamics (CFD) has been applied increasingly to elucidate the impact of clinically variable parameters, such as injection location, on the downstream particle distribution. This study aims to reduce the computational cost of such CFD approaches by introducing a novel truncation algorithm to simplify hepatic arterial trees, and a hybrid particle-flow modeling approach which only models particles in the first few bifurcations. A patient-specific hepatic arterial geometry was pruned at three different levels, resulting in three trees: Geometry 1 (48 outlets), Geometry 2 (38 outlets), and Geometry 3 (17 outlets). In each geometry, 1 planar injection and 3 catheter injections (each with different tip locations) were performed. For the truncated geometries, it was assumed that, downstream of the truncated outlets, particles distributed themselves proportional to the blood flow. This allowed to compare the particle distribution in all 48 "outlets" for each geometry. For the planar injections, the median difference in outlet-specific particle distribution between Geometry 1 and 3 was 0.21%; while the median difference between outlet-specific flow and particle distribution in Geometry 1 was 0.40%. Comparing catheter injections, the maximum median difference in particle distribution between Geometry 1 and 3 was 0.24%, while the maximum median difference between particle and flow distribution was 0.62%. The results suggest that the hepatic arterial tree might be reliably truncated to estimate the particle distribution in the full-complexity tree. In the resulting hybrid particle-flow model, explicit particle modeling was only deemed necessary in the first few bifurcations of the arterial tree. Interestingly, using flow distribution as a surrogate for particle distribution in the entire tree was considerably less accurate than using the hybrid model, although the difference was much higher for catheter injections than for planar injections. Future work should focus on replicating and experimentally validating these results in more patient-specific geometries.
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Affiliation(s)
- Tim Bomberna
- IBiTech-Biommeda, Department of Electronics and Information Systems, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent, Ghent University, Ghent, Belgium
| | - Saar Vermijs
- IBiTech-Biommeda, Department of Electronics and Information Systems, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent, Ghent University, Ghent, Belgium
| | - Maryse Lejoly
- Department of Radiology and Medical Imaging, Ghent University Hospital and Ghent University, Ghent, Belgium
| | - Chris Verslype
- Department of Clinical Digestive Oncology, University Hospitals Leuven, Leuven, Belgium
| | - Lawrence Bonne
- Department of Radiology, University Hospitals Leuven, Leuven, Belgium
| | - Geert Maleux
- Department of Radiology, University Hospitals Leuven, Leuven, Belgium.,Department of Imaging and Pathology, KU Leuven, Leuven, Belgium
| | - Charlotte Debbaut
- IBiTech-Biommeda, Department of Electronics and Information Systems, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent, Ghent University, Ghent, Belgium
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De Backer P, Allaeys C, Creemers H, Hallemeesch A, Mestdagh K, Cisternino F, Ferraguti F, Vermijs S, Janssens R, Van Praet C, Dambre J, Debbaut C, Decaestecker K, Mottrie A. Deep learning in robot-assisted partial nephrectomy: Advent of realistic augmented reality. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)01350-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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