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Wagner S, Ewald C, Freitag D, Herrmann KH, Koch A, Bauer J, Vogl TJ, Kemmling A, Gufler H. Radiomics and visual analysis for predicting success of transplantation of heterotopic glioblastoma in mice with MRI. J Neurooncol 2024; 169:257-267. [PMID: 38960965 PMCID: PMC11341603 DOI: 10.1007/s11060-024-04725-z] [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: 03/31/2024] [Accepted: 05/25/2024] [Indexed: 07/05/2024]
Abstract
BACKGROUND Quantifying tumor growth and treatment response noninvasively poses a challenge to all experimental tumor models. The aim of our study was, to assess the value of quantitative and visual examination and radiomic feature analysis of high-resolution MR images of heterotopic glioblastoma xenografts in mice to determine tumor cell proliferation (TCP). METHODS Human glioblastoma cells were injected subcutaneously into both flanks of immunodeficient mice and followed up on a 3 T MR scanner. Volumes and signal intensities were calculated. Visual assessment of the internal tumor structure was based on a scoring system. Radiomic feature analysis was performed using MaZda software. The results were correlated with histopathology and immunochemistry. RESULTS 21 tumors in 14 animals were analyzed. The volumes of xenografts with high TCP (H-TCP) increased, whereas those with low TCP (L-TCP) or no TCP (N-TCP) continued to decrease over time (p < 0.05). A low intensity rim (rim sign) on unenhanced T1-weighted images provided the highest diagnostic accuracy at visual analysis for assessing H-TCP (p < 0.05). Applying radiomic feature analysis, wavelet transform parameters were best for distinguishing between H-TCP and L-TCP / N-TCP (p < 0.05). CONCLUSION Visual and radiomic feature analysis of the internal structure of heterotopically implanted glioblastomas provide reproducible and quantifiable results to predict the success of transplantation.
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Affiliation(s)
- Sabine Wagner
- Department of Neuroradiology, Marburg University Hospital - Philipps University, 35043, Marburg, Germany.
- Department of Neuroradiology, Institute for Diagnostic and Interventional Radiology, Jena University Hospital - Friedrich Schiller University, 07747, Jena, Germany.
| | - Christian Ewald
- Department of Neurosurgery, Brandenburg Medical School, Theodor Fontane, University Hospital Brandenburg/Havel, 14770, Brandenburg/Havel, Germany
| | - Diana Freitag
- Department of Neurosurgery, Section of Experimental Neurooncology, Jena University Hospital - Friedrich Schiller University, 07747, Jena, Germany
| | - Karl-Heinz Herrmann
- Medical Physics Group, Institute for Diagnostic and Interventional Radiology, Jena University Hospital - Friedrich Schiller University, 07743, Jena, Germany
| | - Arend Koch
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, and Berlin Institute of Health, Charité University Medicine, 10117, Berlin, Germany
| | - Johannes Bauer
- Department of Neurosurgery, Brandenburg Medical School, Theodor Fontane, University Hospital Brandenburg/Havel, 14770, Brandenburg/Havel, Germany
| | - Thomas J Vogl
- Department of Diagnostic and Interventional Radiology, Goethe University Hospital Frankfurt, 60590, Frankfurt Am Main, Germany
| | - André Kemmling
- Department of Neuroradiology, Marburg University Hospital - Philipps University, 35043, Marburg, Germany
| | - Hubert Gufler
- Department of Diagnostic and Interventional Radiology, Goethe University Hospital Frankfurt, 60590, Frankfurt Am Main, Germany
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Tweedie MEP, Kersemans V, Gilchrist S, Smart S, Warner JH. Electromagnetically Transparent Graphene Respiratory Sensors for Multimodal Small Animal Imaging. Adv Healthc Mater 2020; 9:e2001222. [PMID: 32965091 DOI: 10.1002/adhm.202001222] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/31/2020] [Indexed: 11/06/2022]
Abstract
Magnetic resonance imaging (MRI) and computed tomography (CT) imaging with X-rays are crucial diagnostic techniques in medicine, especially in oncology for evaluating the response to treatment. Body movement causes image blurring and synchronized gating to the respiratory and cardiac cycles is required. Degradation of MRI and CT imaging by the presence of metal in electronic respiratory sensors has limited their use, with a preference for pressure balloons for detecting respiration, but these are cumbersome and insensitive. Here, graphene's role is studied as an electromagnetically transparent electrode in a piezoelectric graphene respiratory sensor (GRS) device designed specifically for dual gated MRI and CT imaging of small animals. The GRS is integrated into a 3D-printed cradle with all-carbon-based device life support (heating pad) and monitoring of small animals (electrocardiogram), enabling both heartbeat and respiration detection, significant improvements to throughput and reproducibility, and reduced animal suffering. This shows graphene's potential for a wide range of electromagnetic transparent electronics for medical imaging and diagnostics, beyond conventional metal electrodes.
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Affiliation(s)
| | - Veerle Kersemans
- Department of Oncology Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology University of Oxford Oxford OX3 7DQ UK
| | - Stuart Gilchrist
- Department of Oncology Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology University of Oxford Oxford OX3 7DQ UK
| | - Sean Smart
- Department of Oncology Cancer Research UK and Medical Research Council Oxford Institute for Radiation Oncology University of Oxford Oxford OX3 7DQ UK
| | - Jamie H. Warner
- Walker Department of Mechanical Engineering The University of Texas at Austin 204 East Dean Keeton Street Austin TX 78712 USA
- Materials Graduate Program Texas Materials Institute The University of Texas at Austin 204 East Dean Keeton Street Austin TX 78712 USA
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Nouls JC, Virgincar RS, Culbert AG, Morand N, Bobbert DW, Yoder AD, Schopler RS, Bashir MR, Badea A, Hochgeschwender U, Driehuys B. Applications of 3D printing in small animal magnetic resonance imaging. J Med Imaging (Bellingham) 2019; 6:021605. [PMID: 31131288 PMCID: PMC6519666 DOI: 10.1117/1.jmi.6.2.021605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 04/15/2019] [Indexed: 11/14/2022] Open
Abstract
Three-dimensional (3D) printing has significantly impacted the quality, efficiency, and reproducibility of preclinical magnetic resonance imaging. It has vastly expanded the ability to produce MR-compatible parts that readily permit customization of animal handling, achieve consistent positioning of anatomy and RF coils promptly, and accelerate throughput. It permits the rapid and cost-effective creation of parts customized to a specific imaging study, animal species, animal weight, or even one unique animal, not routinely used in preclinical research. We illustrate the power of this technology by describing five preclinical studies and specific solutions enabled by different 3D printing processes and materials. We describe fixtures, assemblies, and devices that were created to ensure the safety of anesthetized lemurs during an MR examination of their brain or to facilitate localized, contrast-enhanced measurements of white blood cell concentration in a mouse model of pancreatitis. We illustrate expansive use of 3D printing to build a customized birdcage coil and components of a ventilator to enable imaging of pulmonary gas exchange in rats using hyperpolarizedXe 129 . Finally, we present applications of 3D printing to create high-quality, dual RF coils to accelerate brain connectivity mapping in mouse brain specimens and to increase the throughput of brain tumor examinations in a mouse model of pituitary adenoma.
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Affiliation(s)
- John C. Nouls
- Duke University Medical Center, Department of Radiology, Durham, North Carolina, United States
| | - Rohan S. Virgincar
- Duke University, Department of Biomedical Engineering, Durham, North Carolina, United States
| | - Alexander G. Culbert
- Duke University, Department of Biomedical Engineering, Durham, North Carolina, United States
| | | | - Dana W. Bobbert
- Duke University, Office of Information Technology, Durham, North Carolina, United States
| | - Anne D. Yoder
- Duke University, Department of Biology, Durham, North Carolina, United States
- Duke University, Lemur Center, Durham, North Carolina, United States
| | | | - Mustafa R. Bashir
- Duke University Medical Center, Department of Radiology, Durham, North Carolina, United States
| | - Alexandra Badea
- Duke University Medical Center, Department of Radiology, Durham, North Carolina, United States
| | - Ute Hochgeschwender
- Central Michigan University, College of Medicine, Mount Pleasant, Michigan, United States
| | - Bastiaan Driehuys
- Duke University Medical Center, Department of Radiology, Durham, North Carolina, United States
- Duke University, Department of Biomedical Engineering, Durham, North Carolina, United States
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Anderson CE, Wang CY, Gu Y, Darrah R, Griswold MA, Yu X, Flask CA. Regularly incremented phase encoding - MR fingerprinting (RIPE-MRF) for enhanced motion artifact suppression in preclinical cartesian MR fingerprinting. Magn Reson Med 2017; 79:2176-2182. [PMID: 28796368 DOI: 10.1002/mrm.26865] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 07/19/2017] [Indexed: 12/11/2022]
Abstract
PURPOSE The regularly incremented phase encoding-magnetic resonance fingerprinting (RIPE-MRF) method is introduced to limit the sensitivity of preclinical MRF assessments to pulsatile and respiratory motion artifacts. METHODS As compared to previously reported standard Cartesian-MRF methods (SC-MRF), the proposed RIPE-MRF method uses a modified Cartesian trajectory that varies the acquired phase-encoding line within each dynamic MRF dataset. Phantoms and mice were scanned without gating or triggering on a 7T preclinical MRI scanner using the RIPE-MRF and SC-MRF methods. In vitro phantom longitudinal relaxation time (T1 ) and transverse relaxation time (T2 ) measurements, as well as in vivo liver assessments of artifact-to-noise ratio (ANR) and MRF-based T1 and T2 mean and standard deviation, were compared between the two methods (n = 5). RESULTS RIPE-MRF showed significant ANR reductions in regions of pulsatility (P < 0.005) and respiratory motion (P < 0.0005). RIPE-MRF also exhibited improved precision in T1 and T2 measurements in comparison to the SC-MRF method (P < 0.05). The RIPE-MRF and SC-MRF methods displayed similar mean T1 and T2 estimates (difference in mean values < 10%). CONCLUSION These results show that the RIPE-MRF method can provide effective motion artifact suppression with minimal impact on T1 and T2 accuracy for in vivo small animal MRI studies. Magn Reson Med 79:2176-2182, 2018. © 2017 International Society for Magnetic Resonance in Medicine.
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Affiliation(s)
- Christian E Anderson
- Department of Radiology, Case Western Reserve University, Cleveland, Ohio, USA.,Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA
| | - Charlie Y Wang
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA
| | - Yuning Gu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA
| | - Rebecca Darrah
- Frances Payne Bolton School of Nursing, Case Western Reserve University, Cleveland, Ohio, USA.,Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, Ohio, USA
| | - Mark A Griswold
- Department of Radiology, Case Western Reserve University, Cleveland, Ohio, USA.,Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA
| | - Xin Yu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA.,Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, Ohio, USA
| | - Chris A Flask
- Department of Radiology, Case Western Reserve University, Cleveland, Ohio, USA.,Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA.,Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio, USA
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Landgraf L, Christner C, Storck W, Schick I, Krumbein I, Dähring H, Haedicke K, Heinz-Herrmann K, Teichgräber U, Reichenbach JR, Tremel W, Tenzer S, Hilger I. A plasma protein corona enhances the biocompatibility of Au@Fe3O4 Janus particles. Biomaterials 2015; 68:77-88. [DOI: 10.1016/j.biomaterials.2015.07.049] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 07/24/2015] [Accepted: 07/31/2015] [Indexed: 12/28/2022]
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Krämer M, Herrmann KH, Biermann J, Freiburger S, Schwarzer M, Reichenbach JR. Self-gated cardiac Cine MRI of the rat on a clinical 3 T MRI system. NMR IN BIOMEDICINE 2015; 28:162-167. [PMID: 25417764 DOI: 10.1002/nbm.3234] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 10/09/2014] [Accepted: 10/11/2014] [Indexed: 06/04/2023]
Abstract
The ability to perform small animal functional cardiac imaging on clinical MRI scanners may be of particular value in cases in which the availability of a dedicated high field animal MRI scanner is limited. Here, we propose radial MR cardiac imaging in the rat on a whole-body clinical 3 T scanner in combination with interspersed projection navigators for self-gating without any additional external triggering requirements for electrocardiogram (ECG) and respiration. Single navigator readouts were interspersed using the same TR and a high navigator frequency of 54 Hz into a radial golden-angle acquisition. The extracted navigator function was thresholded to exclude data for reconstruction from inhalation phases during the breathing cycle, enabling free breathing acquisition. To minimize flow artifacts in the dynamic cine images a center-out half echo radial acquisition scheme with ramp sampling was used. Navigator functions were derived from the corresponding projection navigator data from which both respiration and cardiac cycles were extracted. Self-gated cine acquisition resulted in high-quality cardiac images which were free of major artifacts with spatial resolution of up to 0.21 × 0.21 × 1.00 mm(3) and a contrast-to-noise ratio (CNR) of 21 ± 3 between the myocardium and left ventricle. Self-gated golden ratio based radial acquisition successfully acquired cine images of the rat heart on a clinical MRI system without the need for dedicated animal ECG equipment.
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Affiliation(s)
- Martin Krämer
- Medical Physics Group, Institute of Diagnostic and Interventional Radiology, Jena University Hospital - Friedrich Schiller University Jena, Philosophenweg 3, D-07743, Jena, Germany
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Zöllner FG, Kalayciyan R, Chacón-Caldera J, Zimmer F, Schad LR. Pre-clinical functional Magnetic Resonance Imaging part I: The kidney. Z Med Phys 2014; 24:286-306. [DOI: 10.1016/j.zemedi.2014.05.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 05/19/2014] [Accepted: 05/19/2014] [Indexed: 01/10/2023]
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