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Paun B, Leon DG, Cabello AC, Pages RM, de la Calle Vargas E, Muñoz PC, Garcia VV, Castell-Conesa J, Baleriola MM, Camacho JRH. Modelling the skeletal muscle injury recovery using in vivo contrast-enhanced micro-CT: a proof-of-concept study in a rat model. Eur Radiol Exp 2020; 4:33. [PMID: 32488324 PMCID: PMC7266881 DOI: 10.1186/s41747-020-00163-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 04/22/2020] [Indexed: 01/06/2023] Open
Abstract
Background Skeletal muscle injury characterisation during healing supports trauma prognosis. Given the potential interest of computed tomography (CT) in muscle diseases and lack of in vivo CT methodology to image skeletal muscle wound healing, we tracked skeletal muscle injury recovery using in vivo micro-CT in a rat model to obtain a predictive model. Methods Skeletal muscle injury was performed in 23 rats. Twenty animals were sorted into five groups to image lesion recovery at 2, 4, 7, 10, or 14 days after injury using contrast-enhanced micro-CT. Injury volumes were quantified using a semiautomatic image processing, and these values were used to build a prediction model. The remaining 3 rats were imaged at all monitoring time points as validation. Predictions were compared with Bland-Altman analysis. Results Optimal contrast agent dose was found to be 20 mL/kg injected at 400 μL/min. Injury volumes showed a decreasing tendency from day 0 (32.3 ± 12.0mm3, mean ± standard deviation) to day 2, 4, 7, 10, and 14 after injury (19.6 ± 12.6, 11.0 ± 6.7, 8.2 ± 7.7, 5.7 ± 3.9, and 4.5 ± 4.8 mm3, respectively). Groups with single monitoring time point did not yield significant differences with the validation group lesions. Further exponential model training with single follow-up data (R2 = 0.968) to predict injury recovery in the validation cohort gave a predictions root mean squared error of 6.8 ± 5.4 mm3. Further prediction analysis yielded a bias of 2.327. Conclusion Contrast-enhanced CT allowed in vivo tracking of skeletal muscle injury recovery in rat.
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Affiliation(s)
- Bruno Paun
- Medical Molecular Imaging Group, Vall d'Hebron Research Institute (VHIR), CIBER-BBN, CIBBIM-Nanomedicine, ISCIII, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig de la Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Daniel García Leon
- Medical Molecular Imaging Group, Vall d'Hebron Research Institute (VHIR), CIBER-BBN, CIBBIM-Nanomedicine, ISCIII, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig de la Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Alex Claveria Cabello
- Medical Molecular Imaging Group, Vall d'Hebron Research Institute (VHIR), CIBER-BBN, CIBBIM-Nanomedicine, ISCIII, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig de la Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Roso Mares Pages
- Medical Molecular Imaging Group, Vall d'Hebron Research Institute (VHIR), CIBER-BBN, CIBBIM-Nanomedicine, ISCIII, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig de la Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Elena de la Calle Vargas
- Medical Molecular Imaging Group, Vall d'Hebron Research Institute (VHIR), CIBER-BBN, CIBBIM-Nanomedicine, ISCIII, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig de la Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Paola Contreras Muñoz
- Health & Biomedicine division, Leitat Technological Center, 2. C/ Pallars, 179-185, 08005, Barcelona, Spain.,Bioengineering, Cell therapy and Surgery in Congenital Malformations Laboratory, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig de la Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Vanessa Venegas Garcia
- Health & Biomedicine division, Leitat Technological Center, 2. C/ Pallars, 179-185, 08005, Barcelona, Spain.,Bioengineering, Cell therapy and Surgery in Congenital Malformations Laboratory, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig de la Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Joan Castell-Conesa
- Medical Molecular Imaging Group, Vall d'Hebron Research Institute (VHIR), CIBER-BBN, CIBBIM-Nanomedicine, ISCIII, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig de la Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Mario Marotta Baleriola
- Health & Biomedicine division, Leitat Technological Center, 2. C/ Pallars, 179-185, 08005, Barcelona, Spain.,Bioengineering, Cell therapy and Surgery in Congenital Malformations Laboratory, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig de la Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Jose Raul Herance Camacho
- Medical Molecular Imaging Group, Vall d'Hebron Research Institute (VHIR), CIBER-BBN, CIBBIM-Nanomedicine, ISCIII, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig de la Vall d'Hebron 119-129, 08035, Barcelona, Spain.
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Han M, Kim B, Baek J. Human and model observer performance for lesion detection in breast cone beam CT images with the FDK reconstruction. PLoS One 2018; 13:e0194408. [PMID: 29543868 PMCID: PMC5854363 DOI: 10.1371/journal.pone.0194408] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 02/19/2018] [Indexed: 12/12/2022] Open
Abstract
We investigate the detectability of breast cone beam computed tomography images using human and model observers and the variations of exponent, β, of the inverse power-law spectrum for various reconstruction filters and interpolation methods in the Feldkamp-Davis-Kress (FDK) reconstruction. Using computer simulation, a breast volume with a 50% volume glandular fraction and a 2mm diameter lesion are generated and projection data are acquired. In the FDK reconstruction, projection data are apodized using one of three reconstruction filters; Hanning, Shepp-Logan, or Ram-Lak, and back-projection is performed with and without Fourier interpolation. We conduct signal-known-exactly and background-known-statistically detection tasks. Detectability is evaluated by human observers and their performance is compared with anthropomorphic model observers (a non-prewhitening observer with eye filter (NPWE) and a channelized Hotelling observer with either Gabor channels or dense difference-of-Gaussian channels). Our results show that the NPWE observer with a peak frequency of 7cyc/degree attains the best correlation with human observers for the various reconstruction filters and interpolation methods. We also discover that breast images with smaller β do not yield higher detectability in the presence of quantum noise.
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Affiliation(s)
- Minah Han
- School of Integrated Technology and Yonsei Institute of Convergence Technology, Yonsei University, Incheon, South Korea
| | - Byeongjoon Kim
- School of Integrated Technology and Yonsei Institute of Convergence Technology, Yonsei University, Incheon, South Korea
| | - Jongduk Baek
- School of Integrated Technology and Yonsei Institute of Convergence Technology, Yonsei University, Incheon, South Korea
- * E-mail:
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