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Chae Y, Cheers GM, Kim M, Reidler P, Klein A, Fevens T, Holzapfel BM, Mayer-Wagner S. MRI as a viable alternative to CT for 3D surgical planning of cavitary bone tumors. Magn Reson Imaging 2025; 119:110369. [PMID: 40049253 DOI: 10.1016/j.mri.2025.110369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2025] [Revised: 02/24/2025] [Accepted: 03/02/2025] [Indexed: 03/10/2025]
Abstract
Cavitary bone defects, defined as a volumetric loss of native bone tissue, require accurate preoperative imaging for treatment planning. While CT (computed tomography) has traditionally been the gold standard for segmentation due to its superior resolution of cortical bone, MRI (magnetic resonance imaging) offers unique advantages, particularly in visualizing the soft tissue-bone interface. Furthermore, MRI eliminates the ionizing radiation associated with CT, making it an advantageous alternative, especially in the management of benign and low-grade malignant bone tumors. Despite these advantages, MRI's inherently lower spatial resolution may introduce artifacts, which can complicate segmentation accuracy. This study evaluates the feasibility of MRI as a viable alternative to CT in the preoperative planning of cavitary bone defect treatment. We analyzed CT and MRI scans from 80 patients with benign and locally aggressive primary bone tumors, generating three-dimensional (3D) models through manual segmentation in Mimics, validated using Geomagic Control X. Volumetric differences between the CT- and MRI-derived models were assessed using the Wilcoxon signed-rank test and paired t-test. The mean volumetric difference between MRI and CT scans was 2.68 ± 1.44 %, which was not statistically significant (p = 0.15). Additionally, multiple regression analysis examining sex, age, and diagnosis revealed no significant differences in the 3D model volumes derived from the two imaging modalities (sex: p = 0.51, age: p = 0.98, and diagnosis: p = 0.50). These results support MRI-based segmentation as a reliable, radiation-free alternative to CT, particularly when precise delineation of soft tissue boundaries is critical for surgical planning.
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Affiliation(s)
- Yooseok Chae
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), Ludwig Maximilian University (LMU) University Hospital, LMU Munich, 81377 Munich, Germany
| | - Giles Michael Cheers
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), Ludwig Maximilian University (LMU) University Hospital, LMU Munich, 81377 Munich, Germany..
| | - MinJoo Kim
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), Ludwig Maximilian University (LMU) University Hospital, LMU Munich, 81377 Munich, Germany
| | - Paul Reidler
- Department of Radiology, LMU University Hospital, LMU Munich, 81377 Munich, Germany
| | - Alexander Klein
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), Ludwig Maximilian University (LMU) University Hospital, LMU Munich, 81377 Munich, Germany
| | - Thomas Fevens
- Department of Computer Science and Software Engineering, Concordia University, Montréal, Canada
| | - Boris Michael Holzapfel
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), Ludwig Maximilian University (LMU) University Hospital, LMU Munich, 81377 Munich, Germany
| | - Susanne Mayer-Wagner
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), Ludwig Maximilian University (LMU) University Hospital, LMU Munich, 81377 Munich, Germany..
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Zhao G, Guan L, Zhang Y, Shi X, Luo W, Yang M, Wang Q, Liu Z, Liu Y, Ding X, Zhao J. 18F-AlF-NOTA-octreotide PET/CT and 3D printing technology for precision diagnosis and treatment of phosphaturic mesenchymal tumors in patients with tumor-induced osteomalacia: two case reports. Front Endocrinol (Lausanne) 2024; 15:1359975. [PMID: 39634185 PMCID: PMC11614613 DOI: 10.3389/fendo.2024.1359975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 10/31/2024] [Indexed: 12/07/2024] Open
Abstract
Objective This study aims to report the application of 18F-AlF-NOTA-Octreotide PET/CT and 3D printing technology in the diagnosis and treatment of phosphaturic mesenchymal tumors (PMT) in patients with tumor-induced osteomalacia (TIO). Case presentation A 68-year-old male patient (Case 1) was admitted to the Weifang People's Hospital in August 2022 with complaints of "persistent pain in the bilateral flank and lumbosacral region". 18F-AlF-NOTA-Octreotide PET/CT showed high octreotide expression in the left femoral region. A 48-year-old male patient (Case 2) was admitted to the Weifang People's Hospital in November 2022, complaining of "pain in the lumbar region and ribs". 18F-AlF-NOTA-Octreotide PET/CT showed high octreotide expression in the pancreatic uncinate process and the left acetabulum. They were diagnosed with hypophosphatemic osteomalacia, with a strong consideration of an underlying neuroendocrine tumor. Preoperative design of 3D virtual surgery, CAD/CAM, and 3D printing technology were used to customize the digital surgical guide plates, and the surgery was carried out. They were both finally confirmed as phosphateuric mesenchymal tumors (PMT) based on postoperative pathology and immunohistochemistry results. Both patients experienced substantial relief from their clinical manifestations after surgery. Conclusion 18F-AlF-NOTA-Octreotide PET/CT may be a precise diagnostic method for TIO, while 3D printing technology may serve as an effective and dependable adjunct for the treatment of PMT in patients with TIO.
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Affiliation(s)
- Gang Zhao
- Department of Orthopedics and Trauma, Weifang People’s Hospital, First Affiliated Hospital of Shandong Second Medical University, Weifang, China
| | - Lijuan Guan
- Nursing Department, Weifang Stomatology Hospital, Weifang, China
| | - Yongqiang Zhang
- Department of Orthopedics and Trauma, Weifang People’s Hospital, First Affiliated Hospital of Shandong Second Medical University, Weifang, China
| | - Xingzhen Shi
- Department of Orthopedics and Trauma, Weifang People’s Hospital, First Affiliated Hospital of Shandong Second Medical University, Weifang, China
| | - Wenming Luo
- Department of Orthopedics and Trauma, Weifang People’s Hospital, First Affiliated Hospital of Shandong Second Medical University, Weifang, China
| | - Maiqing Yang
- Department of Pathology, Weifang People’s Hospital, First Affiliated Hospital of Shandong Second Medical University, Weifang, China
| | - Qi Wang
- Department of Orthopedics and Trauma, Weifang People’s Hospital, First Affiliated Hospital of Shandong Second Medical University, Weifang, China
| | - Zhen Liu
- Department of Orthopedics and Trauma, Weifang People’s Hospital, First Affiliated Hospital of Shandong Second Medical University, Weifang, China
| | - Yongqiang Liu
- Department of Orthopedics and Trauma, Weifang People’s Hospital, First Affiliated Hospital of Shandong Second Medical University, Weifang, China
| | - Xiaolei Ding
- College of Traditional Chinese Medicine, Changchun University of Chinese Medicine, Changchun, Jilin, China
| | - Jie Zhao
- Department of Orthopedics and Trauma, Weifang People’s Hospital, First Affiliated Hospital of Shandong Second Medical University, Weifang, China
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Vila M, Xiberta P, Ruiz M, Bermudo R, Leivas D, Fariñas O, Vilarrodona A, Boada I. BeST-Graft viewer, a new system to improve the bone allograft-recipient matching process. Comput Biol Med 2024; 176:108553. [PMID: 38723397 DOI: 10.1016/j.compbiomed.2024.108553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 04/23/2024] [Accepted: 04/30/2024] [Indexed: 05/31/2024]
Abstract
INTRODUCTION Tissue establishments are responsible for processing, testing, preserving, storing, and distributing allografts from donors to be transplanted into recipients. In some situations, a matching process is required to determine the allograft that best fits the recipient. Allograft morphology is a key consideration for the matching process. The manual procedures applied to obtain these parameters make the process error-prone. MATERIAL AND METHODS A new system to manage bone allograft-recipient matching for tissue establishments is proposed. The system requires bone allografts to be digitalized and the resulting images to be stored in a DICOM file. The system provides functionalities to: (i) manage DICOM files (registered in the PACs) from both allografts and recipients; (ii) reconstruct 3D models from DICOM images; (iii) explore 3D models using 2D, 3D, and multiplanar reconstructions; (iv) take allograft and recipient measurements; and (v) visualize and interact with recipient and allograft data simultaneously. The system has been installed in the Barcelona Tissue Bank (Banc de Sang i Teixits), which has digitalized the bone allografts to test the system. RESULTS A use case with a femur is presented to test all the viewer functionalities. In addition, the recipient-allograft workflow is evaluated to show the steps of the procedure where the viewer can be used. CONCLUSIONS The bone allograft-recipient matching procedure can be optimized using software tools with functionalities to visualize, interact, and take measurements.
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Affiliation(s)
- Marius Vila
- Graphics and Imaging Laboratory, Universitat de Girona, Girona, Catalonia.
| | - Pau Xiberta
- Graphics and Imaging Laboratory, Universitat de Girona, Girona, Catalonia
| | - Marc Ruiz
- Graphics and Imaging Laboratory, Universitat de Girona, Girona, Catalonia
| | - Raquel Bermudo
- Barcelona Tissue Bank (BTB), Banc de Sang i Teixits (BST), Barcelona, Catalonia; Vall Hebron Institute of Research (VHIR), Barcelona, Catalonia
| | - Daniel Leivas
- Barcelona Tissue Bank (BTB), Banc de Sang i Teixits (BST), Barcelona, Catalonia
| | - Oscar Fariñas
- Barcelona Tissue Bank (BTB), Banc de Sang i Teixits (BST), Barcelona, Catalonia; Biomedical Research Institute (IIB-Sant Pau; SGR1113), Barcelona, Catalonia
| | - Anna Vilarrodona
- Barcelona Tissue Bank (BTB), Banc de Sang i Teixits (BST), Barcelona, Catalonia; Vall Hebron Institute of Research (VHIR), Barcelona, Catalonia
| | - Imma Boada
- Graphics and Imaging Laboratory, Universitat de Girona, Girona, Catalonia
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Mancino AV, Milano FE, Risk MR, Ritacco LE. Open-source navigation system for tracking dissociated parts with multi-registration. Int J Comput Assist Radiol Surg 2023; 18:2167-2177. [PMID: 36881354 DOI: 10.1007/s11548-023-02853-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 02/08/2023] [Indexed: 03/08/2023]
Abstract
PURPOSE During reconstructive surgery, knee and hip replacements, and orthognathic surgery, small misalignments in the pose of prosthesis and bones can lead to severe complications. Hence, the translational and angular accuracies are critical. However, traditional image-based surgical navigation lacks orientation data between structures, and imageless systems are unsuitable for cases of deformed anatomy. We introduce an open-source navigation system using a multiple registration approach that can track instruments, implants, and bones to precisely guide the surgeon in emulating a preoperative plan. METHODS We derived the analytical error of our method and designed a set of phantom experiments to measure its precision and accuracy. Additionally, we trained two classification models to predict the system reliability from fiducial points and surface matching registration data. Finally, to demonstrate the procedure feasibility, we conducted a complete workflow for a real clinical case of a patient with fibrous dysplasia and anatomical misalignment of the right femur using plastic bones. RESULTS The system is able to track the dissociated fragments of the clinical case and average alignment errors in the anatomical phantoms of [Formula: see text] mm and [Formula: see text]. While the fiducial-points registration showed satisfactory results given enough points and covered volume, we acknowledge that the surface refinement step is mandatory when attempting surface matching registrations. CONCLUSION We believe that our device could bring significant advantages for the personalized treatment of complex surgical cases and that its multi-registration attribute is convenient for intraoperative registration loosening cases.
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Affiliation(s)
- A V Mancino
- Instituto Tecnológico de Buenos Aires, Buenos Aires, Argentina.
- Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina.
- Instituto de Medicina Traslacional e Ingeniería Biomédica, Buenos Aires, Argentina.
- Computer Assisted Surgery Unit, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina.
| | - F E Milano
- Instituto Tecnológico de Buenos Aires, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - M R Risk
- Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
- Instituto de Medicina Traslacional e Ingeniería Biomédica, Buenos Aires, Argentina
| | - L E Ritacco
- Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
- Instituto de Medicina Traslacional e Ingeniería Biomédica, Buenos Aires, Argentina
- Computer Assisted Surgery Unit, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
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Virtual surgical planning and 3D printing in pediatric musculoskeletal oncological resections: a proof-of-concept description. Int J Comput Assist Radiol Surg 2023; 18:95-104. [PMID: 36152167 DOI: 10.1007/s11548-022-02745-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 09/01/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND AND OBJECTIVES Patient-specific models may have a role in planning and executing complex surgical procedures. However, creating patient-specific models with virtual surgical planning (VSP) has many steps, from initial imaging to finally realizing the three-dimensional printed model (3DPM). This manuscript evaluated the feasibility and potential benefits of multimodal imaging and geometric VSP and 3DPM in pediatric orthopedic tumor resection and reconstruction. MATERIALS AND METHODS Twelve children with Ewing's sarcoma, osteosarcoma, or chondrosarcoma were studied. Computed tomography (CT) and contrast-enhanced magnetic resonance imaging (MRI) were acquired as the standard-of-care. Bony and soft tissue components of the tumor and the adjacent bone were segmented to create a computer-generated 3D model of the region. VSP used the computer-generated 3D model. The Objet350 Stratasys™ polyjet printer printed the final physical model used for pre-surgical planning, intraoperative reference, and patient education. Clinical impact, the utility of the model, and its geometric accuracy were assessed. RESULTS Subjectively, using the patient-specific model assisted in preoperative planning and intra-operative execution of the surgical plan. The mean difference between the models and the surgical resection was -0.09 mm (range: -0.29-0.45 mm). Pearson's correlation coefficient (r) of the cross-sectional area was -0.9994, linear regression r2 = 0.9989, and the Bland Altman plot at 95% confidence interval showed all data within boundaries. CONCLUSION We studied the geometric accuracy, utility and clinical impact of VSP and 3DPM produced from multi-modal imaging studies and concluded 3DPM accurately represented the patients' tumor and proved very useful to the surgeon in both the preoperative surgical planning, patient and family education and operative phases. Future studies will be planned to evaluate surgery procedure duration and other outcomes.
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van der Heijden L, Farfalli GL, Balacó I, Alves C, Salom M, Lamo-Espinosa JM, San-Julián M, van de Sande MA. Biology and technology in the surgical treatment of malignant bone tumours in children and adolescents, with a special note on the very young. J Child Orthop 2021; 15:322-330. [PMID: 34476021 PMCID: PMC8381388 DOI: 10.1302/1863-2548.15.210095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 06/02/2021] [Indexed: 02/03/2023] Open
Abstract
PURPOSE The main challenge in reconstruction after malignant bone tumour resection in young children remains how and when growth-plates can be preserved and which options remain if impossible. METHODS We describe different strategies to assure best possible long-term function for young children undergoing resection of malignant bone tumours. RESULTS Different resources are available to treat children with malignant bones tumours: a) preoperative planning simulates scenarios for tumour resection and limb reconstruction, facilitating decision-making for surgical and reconstructive techniques in individual patients; b) allograft reconstruction offers bone-stock preservation for future needs. Most allografts are intact at long-term follow-up, but limb-length inequalities and corrective/revision surgery are common in young patients; c) free vascularized fibula can be used as stand-alone reconstruction, vascularized augmentation of structural allograft or devitalized autograft. Longitudinal growth and joint remodelling potential can be preserved, if transferred with vascularized proximal physis; d) epiphysiolysis before resection with continuous physeal distraction provides safe resection margins and maintains growth-plate and epiphysis; e) 3D printing may facilitate joint salvage by reconstruction with patient-specific instruments. Very short stems can be created for fixation in (epi-)metaphysis, preserving native joints; f) growing endoprosthesis can provide for remaining growth after resection of epi-metaphyseal tumours. At ten-year follow-up, limb survival was 89%, but multiple surgeries are often required; g) rotationplasty and amputation should be considered if limb salvage is impossible and/or would result in decreased function and quality of life. CONCLUSION Several biological and technological reconstruction options must be merged and used to yield best outcomes when treating young children with malignant bone tumours. LEVEL OF EVIDENCE Level V Expert opinion.
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Affiliation(s)
- Lizz van der Heijden
- Department of Orthopedic Surgery, Leiden University Medical Center, Leiden, the Netherlands,Correspondence should be sent to Lizz van der Heijden MD PhD, Department of Orthopaedic Surgery, Leiden University Medical Centre, Postal Zone J11-R70, P.O. Box 9600, 2300 RC Leiden, the Netherlands. E-mail:
| | - Germán L. Farfalli
- Department of Orthopedic Surgery, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Inês Balacó
- Department of Pediatric Orthopedics – Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Cristina Alves
- Department of Pediatric Orthopedics – Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Marta Salom
- Department of Pediatric Orthopedics, Hospital Universitari i Politècnic La Fe, Valencia, Spain
| | | | - Mikel San-Julián
- Department of Orthopedic Surgery, Clinica Universidad de Navarra, Pamplona, Spain
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