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Nekolla SG, Rischpler C, Higuchi T. Preclinical Imaging of Cardiovascular Disesase. Semin Nucl Med 2023; 53:586-598. [PMID: 37268498 DOI: 10.1053/j.semnuclmed.2023.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 04/24/2023] [Accepted: 04/26/2023] [Indexed: 06/04/2023]
Abstract
Noninvasive imaging techniques, such as SPECT, PET, CT, echocardiography, or MRI, have become essential in cardiovascular research. They allow for the evaluation of biological processes in vivo without the need for invasive procedures. Nuclear imaging methods, such as SPECT and PET, offer numerous advantages, including high sensitivity, reliable quantification, and the potential for serial imaging. Modern SPECT and PET imaging systems, equipped with CT and MRI components in order to get access to morphological information with high spatial resolution, are capable of imaging a wide range of established and innovative agents in both preclinical and clinical settings. This review highlights the utility of SPECT and PET imaging as powerful tools for translational research in cardiology. By incorporating these techniques into a well-defined workflow- similar to those used in clinical imaging- the concept of "bench to bedside" can be effectively implemented.
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Affiliation(s)
- Stephan G Nekolla
- Nuklearmedizinische Klinik der TU München, Munich, Germany; DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany.
| | | | - Takahiro Higuchi
- Department of Nuclear Medicine, University Hospital Würzburg, Würzburg, Germany; Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
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2
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Abstract
Molecular imaging enables both spatial and temporal understanding of the complex biologic systems underlying carcinogenesis and malignant spread. Single-photon emission tomography (SPECT) is a versatile nuclear imaging-based technique with ideal properties to study these processes in vivo in small animal models, as well as to identify potential drug candidates and characterize their antitumor action and potential adverse effects. Small animal SPECT and SPECT-CT (single-photon emission tomography combined with computer tomography) systems continue to evolve, as do the numerous SPECT radiopharmaceutical agents, allowing unprecedented sensitivity and quantitative molecular imaging capabilities. Several of these advances, their specific applications in oncology as well as new areas of exploration are highlighted in this chapter.
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Affiliation(s)
- Benjamin L Franc
- Department of Radiology, Stanford University School of Medicine, 300 Pasteur Drive, H2232, MC 5281, Stanford, CA, 94305-5105, USA.
| | - Youngho Seo
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, USA
| | - Robert Flavell
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, USA
| | - Carina Mari Aparici
- Department of Radiology, Stanford University School of Medicine, 300 Pasteur Drive, H2232, MC 5281, Stanford, CA, 94305-5105, USA
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Kochebina O, Halty A, Taleb J, Kryza D, Janier M, Sadr AB, Baudier T, Rit S, Sarrut D. In vivo gadolinium nanoparticle quantification with SPECT/CT. EJNMMI Phys 2019; 6:9. [PMID: 31214809 PMCID: PMC6582109 DOI: 10.1186/s40658-019-0246-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 05/13/2019] [Indexed: 02/07/2023] Open
Abstract
Background Gadolinium nanoparticles (Gd-NP) combined with radiotherapy are investigated for radiation dose enhancement in radiotherapy treatment. Indeed, NPs concentrated in a tumor could enhance its radiosensitization. The noninvasive quantification of the NP concentration is a crucial task for radiotherapy treatment planning and post-treatment monitoring as it will determine the absorbed dose. In this work, we evaluate the achievable accuracy of in vivo SPECT-based Gd-NP organ concentration on rats. Methods Gd-NPs were labeled with 111In radionuclide. SPECT images have been acquired on phantom and rats, with various Gd-NP injections. Images have been calibrated and corrected for attenuation, scatter, and partial volume effect. Image-based estimations were compared to both inductively coupled plasma mass spectrometer (ICP-MS) for Gd concentration and ex vivo organ activity measured by gamma counter. Results The accuracy for the Gd mass measurements in organ was within 10% for activity above 2 MBq or concentrations above ∼ 3–4 MBq/mL. The Gd mass calculation is based on In-Gd coefficient which defines the Gd detection limit. It was found to be in a range from 2 mg/MBq to 2 µg/MBq depending on the proportions of initial injection preparations. Measurement was also impaired by free Gd and 111In formed during metabolic processes. Conclusions Even if SPECT image quantification remains challenging mostly due to partial volume effect, this study shows that it has potential for the Gd mass measurements in organ. The main limitation of the method is its indirectness, and a special care should be taken if the organ of interest could be influenced by different clearance rate of free Gd and 111In formed by metabolic processes. We also discuss the practical aspects, potential, and limitations of Gd-NP in vivo image quantification with a SPECT.
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Affiliation(s)
- Olga Kochebina
- CREATIS-CNRS UMR 5220 - INSERM U1206 - Université Lyon 1 - INSA Lyon - Université Jean Monnet Saint-Etienne, Lyon, 69373, France. .,Centre Léon Bérard, Lyon, 69008, France.
| | - Adrien Halty
- CREATIS-CNRS UMR 5220 - INSERM U1206 - Université Lyon 1 - INSA Lyon - Université Jean Monnet Saint-Etienne, Lyon, 69373, France.,Centre Léon Bérard, Lyon, 69008, France
| | - Jacqueline Taleb
- UNIV Lyon - Université Claude Bernard Lyon 1, LAGEPP UMR 5007 CNRS, Villeurbanne, France.,Hospices Civils de Lyon, Lyon, 69437, France
| | - David Kryza
- UNIV Lyon - Université Claude Bernard Lyon 1, LAGEPP UMR 5007 CNRS, Villeurbanne, France.,Hospices Civils de Lyon, Lyon, 69437, France
| | - Marc Janier
- UNIV Lyon - Université Claude Bernard Lyon 1, LAGEPP UMR 5007 CNRS, Villeurbanne, France.,Hospices Civils de Lyon, Lyon, 69437, France
| | - Alexandre Bani Sadr
- UNIV Lyon - Université Claude Bernard Lyon 1, LAGEPP UMR 5007 CNRS, Villeurbanne, France.,Hospices Civils de Lyon, Lyon, 69437, France
| | - Thomas Baudier
- CREATIS-CNRS UMR 5220 - INSERM U1206 - Université Lyon 1 - INSA Lyon - Université Jean Monnet Saint-Etienne, Lyon, 69373, France.,Centre Léon Bérard, Lyon, 69008, France
| | - Simon Rit
- CREATIS-CNRS UMR 5220 - INSERM U1206 - Université Lyon 1 - INSA Lyon - Université Jean Monnet Saint-Etienne, Lyon, 69373, France
| | - David Sarrut
- CREATIS-CNRS UMR 5220 - INSERM U1206 - Université Lyon 1 - INSA Lyon - Université Jean Monnet Saint-Etienne, Lyon, 69373, France.,Centre Léon Bérard, Lyon, 69008, France
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Abbaspour S, Tanha K, Mahmoudian B, Assadi M, Pirayesh Islamian J. A Monte Carlo study on the performance evaluation of a parallel hole collimator for a HiReSPECT: A dedicated small-animal SPECT. Appl Radiat Isot 2018; 139:53-60. [PMID: 29704706 DOI: 10.1016/j.apradiso.2018.04.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 04/07/2018] [Accepted: 04/16/2018] [Indexed: 11/16/2022]
Abstract
Collimator geometry has an important contribution on the image quality in SPECT imaging. The purpose of this study was to investigate the effect of parallel hole collimator hole-size on the functional parameters (including the spatial resolution and sensitivity) and the image quality of a HiReSPECT imaging system using SIMIND Monte Carlo program. To find a proper trade-off between the sensitivity and spatial resolution, the collimator with hole diameter ranges of 0.3-1.5 mm (in steps of 0.3 mm) were used with a fixed septal and hole thickness values (0.2 mm and 34 mm, respectively). Lead, Gold, and Tungsten as the LEHR collimator material were also investigated. The results on a 99mTc point source scanning with the experimental and also simulated systems were matched to validate the simulated imaging system. The results on the simulation showed that decreasing the collimator hole size, especially in the Gold collimator, improved the spatial resolution to 18% and 3.2% compared to the Lead and the Tungsten, respectively. Meanwhile, the Lead collimator provided a good sensitivity in about of 7% and 8% better than that of Tungsten and Gold, respectively. Overall, the spatial resolution and sensitivity showed small differences among the three types of collimator materials assayed within the defined energy. By increasing the hole size, the Gold collimator produced lower scatter and penetration fractions than Tungsten and Lead collimator. The minimum detectable size of hot rods in micro-Jaszczak phantom on the iterative maximum-likelihood expectation maximization (MLEM) reconstructed images, were determined in the sectors of 1.6, 1.8, 2.0, 2.4 and 2.6 mm for scanning with the collimators in hole sizes of 0.3, 0.6, 0.9, 1.2 and 1.5 mm at a 5 cm distance from the phantom. The Gold collimator with hole size of 0.3 mm provided a better image quality with the HiReSPECT imaging.
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Affiliation(s)
- Samira Abbaspour
- Department of Radiotherapy, Faculty of Medicine, Arak University of Medical Sciences, Arak, Iran
| | - Kaveh Tanha
- The Persian Gulf Nuclear Medicine Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Babak Mahmoudian
- Department of Radiology, Radiotherapy and Nuclear Medicine, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Majid Assadi
- The Persian Gulf Nuclear Medicine Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Jalil Pirayesh Islamian
- Department of Medical Physics, Faculty of Medicine, Tabriz University of Medical Sciences, Attar Neyshaburi St, Azadi Ave, Tabriz 5166614766, Iran.
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