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Lerouge L, Gries M, Chateau A, Daouk J, Lux F, Rocchi P, Cedervall J, Olsson AK, Tillement O, Frochot C, Acherar S, Thomas N, Barberi-Heyob M. Targeting Glioblastoma-Associated Macrophages for Photodynamic Therapy Using AGuIX ®-Design Nanoparticles. Pharmaceutics 2023; 15:pharmaceutics15030997. [PMID: 36986856 PMCID: PMC10057379 DOI: 10.3390/pharmaceutics15030997] [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: 02/13/2023] [Revised: 03/15/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
Glioblastoma (GBM) is the most difficult brain cancer to treat, and photodynamic therapy (PDT) is emerging as a complementary approach to improve tumor eradication. Neuropilin-1 (NRP-1) protein expression plays a critical role in GBM progression and immune response. Moreover, various clinical databases highlight a relationship between NRP-1 and M2 macrophage infiltration. In order to induce a photodynamic effect, multifunctional AGuIX®-design nanoparticles were used in combination with a magnetic resonance imaging (MRI) contrast agent, as well as a porphyrin as the photosensitizer molecule and KDKPPR peptide ligand for targeting the NRP-1 receptor. The main objective of this study was to characterize the impact of macrophage NRP-1 protein expression on the uptake of functionalized AGuIX®-design nanoparticles in vitro and to describe the influence of GBM cell secretome post-PDT on the polarization of macrophages into M1 or M2 phenotypes. By using THP-1 human monocytes, successful polarization into the macrophage phenotypes was argued via specific morphological traits, discriminant nucleocytoplasmic ratio values, and different adhesion abilities based on real-time cell impedance measurements. In addition, macrophage polarization was confirmed via the transcript-level expression of TNFα, CXCL10, CD-80, CD-163, CD-206, and CCL22 markers. In relation to NRP-1 protein over-expression, we demonstrated a three-fold increase in functionalized nanoparticle uptake for the M2 macrophages compared to the M1 phenotype. The secretome of the post-PDT GBM cells led to nearly a three-fold increase in the over-expression of TNFα transcripts, confirming the polarization to the M1 phenotype. The in vivo relationship between post-PDT efficiency and the inflammatory effects points to the extensive involvement of macrophages in the tumor zone.
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Affiliation(s)
- Lucie Lerouge
- Department of Biology, Signals and Systems in Cancer and Neuroscience, CRAN, UMR7039, Université de Lorraine-French National Scientific Research Center (CNRS), 54500 Vandœuvre-lès-Nancy, France
| | - Mickaël Gries
- Department of Biology, Signals and Systems in Cancer and Neuroscience, CRAN, UMR7039, Université de Lorraine-French National Scientific Research Center (CNRS), 54500 Vandœuvre-lès-Nancy, France
| | - Alicia Chateau
- Department of Biology, Signals and Systems in Cancer and Neuroscience, CRAN, UMR7039, Université de Lorraine-French National Scientific Research Center (CNRS), 54500 Vandœuvre-lès-Nancy, France
| | - Joël Daouk
- Department of Biology, Signals and Systems in Cancer and Neuroscience, CRAN, UMR7039, Université de Lorraine-French National Scientific Research Center (CNRS), 54500 Vandœuvre-lès-Nancy, France
| | - François Lux
- Institute of Light and Matter (ILM), UMR5306, Université de Lyon-CNRS, 69100 Lyon, France
| | - Paul Rocchi
- Institute of Light and Matter (ILM), UMR5306, Université de Lyon-CNRS, 69100 Lyon, France
| | - Jessica Cedervall
- Department of Medical Biochemistry and Microbiology, Science for Life Laboratory, Biomedical Center, Uppsala University, 75105 Uppsala, Sweden
| | - Anna-Karin Olsson
- Department of Medical Biochemistry and Microbiology, Science for Life Laboratory, Biomedical Center, Uppsala University, 75105 Uppsala, Sweden
| | - Olivier Tillement
- Institute of Light and Matter (ILM), UMR5306, Université de Lyon-CNRS, 69100 Lyon, France
| | - Céline Frochot
- Reactions and Chemical Engineering Laboratory (LRGP), UMR7274, Université de Lorraine-CNRS, 54000 Nancy, France
| | - Samir Acherar
- Laboratory of Chemical Physics of Macromolecules (LCPM), UMR7375, Université de Lorraine-CNRS, 54000 Nancy, France
| | - Noémie Thomas
- Department of Biology, Signals and Systems in Cancer and Neuroscience, CRAN, UMR7039, Université de Lorraine-French National Scientific Research Center (CNRS), 54500 Vandœuvre-lès-Nancy, France
| | - Muriel Barberi-Heyob
- Department of Biology, Signals and Systems in Cancer and Neuroscience, CRAN, UMR7039, Université de Lorraine-French National Scientific Research Center (CNRS), 54500 Vandœuvre-lès-Nancy, France
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Douyère M, Gong C, Richard M, Pellegrini-Moïse N, Daouk J, Pierson J, Chastagner P, Boura C. NRP1 inhibition modulates radiosensitivity of medulloblastoma by targeting cancer stem cells. Cancer Cell Int 2022; 22:377. [PMID: 36457009 PMCID: PMC9714111 DOI: 10.1186/s12935-022-02796-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 11/18/2022] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND Medulloblastoma (MB) is the most common pediatric malignant brain tumor. Despite current therapies, the morbidity and recurrent risk remains significant. Neuropilin-1 receptor (NRP1) has been implicated in the tumor progression of MB. Our recent study showed that NRP1 inhibition stimulated MB stem cells differentiation. Consequently, we hypothesized that targeting NRP1 in medulloblastoma could improve current treatments. METHODS NRP1 inhibition with a novel peptidomimetic agent, MR438, was evaluated with radiotherapy (RT) in MB models (DAOY, D283-Med and D341-Med) in vitro on cancer stem-like cells as well as in vivo on heterotopic and orthotopic xenografts. RESULTS We show that NRP1 inhibition by MR438 radiosensitizes MB stem-like cells in vitro. In heterotopic DAOY models, MR438 improves RT efficacy as measured by tumor growth and mouse survival. In addition, clonogenic assays after tumor dissociation showed a significant reduction in cancer stem cells with the combination treatment. In the same way, a benefit of the combined therapy was observed in the orthotopic model only for a low cumulative irradiation dose of 10 Gy but not for 20 Gy. CONCLUSIONS Finally, our results demonstrated that targeting NRP1 with MR438 could be a potential new strategy and could limit MB progression by decreasing the stem cell number while reducing the radiation dose.
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Affiliation(s)
- Manon Douyère
- grid.462787.80000 0001 2151 8763Université de Lorraine, CNRS, CRAN, UMR 7039, 54000 Nancy, France
| | - Caifeng Gong
- grid.462787.80000 0001 2151 8763Université de Lorraine, CNRS, CRAN, UMR 7039, 54000 Nancy, France ,grid.506261.60000 0001 0706 7839Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Can-Cer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Bei-Jing, 100021 China
| | - Mylène Richard
- Université de Lorraine, CNRS, L2CM, UMR 7053, Campus Science, 54500 Vandœuvre-Lès-Nancy, France
| | - Nadia Pellegrini-Moïse
- Université de Lorraine, CNRS, L2CM, UMR 7053, Campus Science, 54500 Vandœuvre-Lès-Nancy, France
| | - Joël Daouk
- grid.462787.80000 0001 2151 8763Université de Lorraine, CNRS, CRAN, UMR 7039, 54000 Nancy, France
| | - Julien Pierson
- grid.462787.80000 0001 2151 8763Université de Lorraine, CNRS, CRAN, UMR 7039, 54000 Nancy, France
| | - Pascal Chastagner
- grid.462787.80000 0001 2151 8763Université de Lorraine, CNRS, CRAN, UMR 7039, 54000 Nancy, France ,grid.410527.50000 0004 1765 1301Service d’Onco-Hématologie Pédiatrique, CHRU-Nancy, 54000 Nancy, France
| | - Cédric Boura
- grid.462787.80000 0001 2151 8763Université de Lorraine, CNRS, CRAN, UMR 7039, 54000 Nancy, France
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Dhaini B, Wagner L, Moinard M, Daouk J, Arnoux P, Schohn H, Schneller P, Acherar S, Hamieh T, Frochot C. Importance of Rose Bengal Loaded with Nanoparticles for Anti-Cancer Photodynamic Therapy. Pharmaceuticals (Basel) 2022; 15:ph15091093. [PMID: 36145315 PMCID: PMC9504923 DOI: 10.3390/ph15091093] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/09/2022] [Accepted: 08/16/2022] [Indexed: 11/23/2022] Open
Abstract
Rose Bengal (RB) is a photosensitizer (PS) used in anti-cancer and anti-bacterial photodynamic therapy (PDT). The specific excitation of this PS allows the production of singlet oxygen and oxygen reactive species that kill bacteria and tumor cells. In this review, we summarize the history of the use of RB as a PS coupled by chemical or physical means to nanoparticles (NPs). The studies are divided into PDT and PDT excited by X-rays (X-PDT), and subdivided on the basis of NP type. On the basis of the papers examined, it can be noted that RB used as a PS shows remarkable cytotoxicity under the effect of light, and RB loaded onto NPs is an excellent candidate for nanomedical applications in PDT and X-PDT.
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Affiliation(s)
- Batoul Dhaini
- Reactions and Chemical Engineering Laboratory, Université de Lorraine, LRGP-CNRS, F-54000 Nancy, France
| | - Laurène Wagner
- Laboratory of Macromolecular Physical Chemistry, Université de Lorraine, LCPM-CNRS, F-54000 Nancy, France
| | - Morgane Moinard
- Reactions and Chemical Engineering Laboratory, Université de Lorraine, LRGP-CNRS, F-54000 Nancy, France
| | - Joël Daouk
- Department of Biology, Signals and Systems in Cancer and Neuroscience, Université de Lorraine, CRAN-CNRS, F-54000 Nancy, France
| | - Philippe Arnoux
- Reactions and Chemical Engineering Laboratory, Université de Lorraine, LRGP-CNRS, F-54000 Nancy, France
| | - Hervé Schohn
- Department of Biology, Signals and Systems in Cancer and Neuroscience, Université de Lorraine, CRAN-CNRS, F-54000 Nancy, France
| | - Perrine Schneller
- Department of Biology, Signals and Systems in Cancer and Neuroscience, Université de Lorraine, CRAN-CNRS, F-54000 Nancy, France
| | - Samir Acherar
- Laboratory of Macromolecular Physical Chemistry, Université de Lorraine, LCPM-CNRS, F-54000 Nancy, France
| | - Tayssir Hamieh
- Faculty of Science and Engineering, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
- Laboratory of Materials, Catalysis, Environment and Analytical Methods Laboratory (MCEMA), Faculty of Sciences, Lebanese University, Hadath 6573, Lebanon
| | - Céline Frochot
- Reactions and Chemical Engineering Laboratory, Université de Lorraine, LRGP-CNRS, F-54000 Nancy, France
- Correspondence:
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Daouk J, Iltis M, Dhaini B, Béchet D, Arnoux P, Rocchi P, Delconte A, Habermeyer B, Lux F, Frochot C, Tillement O, Barberi-Heyob M, Schohn H. Terbium-Based AGuIX-Design Nanoparticle to Mediate X-ray-Induced Photodynamic Therapy. Pharmaceuticals (Basel) 2021; 14:ph14050396. [PMID: 33922073 PMCID: PMC8143523 DOI: 10.3390/ph14050396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 03/24/2021] [Revised: 04/18/2021] [Accepted: 04/19/2021] [Indexed: 01/10/2023] Open
Abstract
X-ray-induced photodynamic therapy is based on the energy transfer from a nanoscintillator to a photosensitizer molecule, whose activation leads to singlet oxygen and radical species generation, triggering cancer cells to cell death. Herein, we synthesized ultra-small nanoparticle chelated with Terbium (Tb) as a nanoscintillator and 5-(4-carboxyphenyl succinimide ester)-10,15,20-triphenyl porphyrin (P1) as a photosensitizer (AGuIX@Tb-P1). The synthesis was based on the AGuIX@ platform design. AGuIX@Tb-P1 was characterised for its photo-physical and physico-chemical properties. The effect of the nanoparticles was studied using human glioblastoma U-251 MG cells and was compared to treatment with AGuIX@ nanoparticles doped with Gadolinium (Gd) and P1 (AGuIX@Gd-P1). We demonstrated that the AGuIX@Tb-P1 design was consistent with X-ray photon energy transfer from Terbium to P1. Both nanoparticles had similar dark cytotoxicity and they were absorbed in a similar rate within the cells. Pre-treated cells exposure to X-rays was related to reactive species production. Using clonogenic assays, establishment of survival curves allowed discrimination of the impact of radiation treatment from X-ray-induced photodynamic effect. We showed that cell growth arrest was increased (35%-increase) when cells were treated with AGuIX@Tb-P1 compared to the nanoparticle doped with Gd.
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Affiliation(s)
- Joël Daouk
- Department of Biology, Signals and Systems in Cancer and Neuroscience, UMR 7039 Research Center for Automatic Control (CRAN), Université de Lorraine–French National Scientific Research Center (CNRS), F-54000 Nancy, France; (J.D.); (M.I.); (D.B.); (A.D.); (H.S.)
| | - Mathilde Iltis
- Department of Biology, Signals and Systems in Cancer and Neuroscience, UMR 7039 Research Center for Automatic Control (CRAN), Université de Lorraine–French National Scientific Research Center (CNRS), F-54000 Nancy, France; (J.D.); (M.I.); (D.B.); (A.D.); (H.S.)
| | - Batoul Dhaini
- Reactions and Chemical Engineering Laboratory (LRGP), UMR 7274, Université de Lorraine–French National Scientific Research Center (CNRS), F-54000 Nancy, France; (B.D.); (P.A.); (C.F.)
| | - Denise Béchet
- Department of Biology, Signals and Systems in Cancer and Neuroscience, UMR 7039 Research Center for Automatic Control (CRAN), Université de Lorraine–French National Scientific Research Center (CNRS), F-54000 Nancy, France; (J.D.); (M.I.); (D.B.); (A.D.); (H.S.)
| | - Philippe Arnoux
- Reactions and Chemical Engineering Laboratory (LRGP), UMR 7274, Université de Lorraine–French National Scientific Research Center (CNRS), F-54000 Nancy, France; (B.D.); (P.A.); (C.F.)
| | - Paul Rocchi
- Light Matter Institute, UMR-5306, Université de Lyon–French National Scientific Research Center (CNRS), F-69000 Lyon, France; (P.R.); (F.L.); (O.T.)
| | - Alain Delconte
- Department of Biology, Signals and Systems in Cancer and Neuroscience, UMR 7039 Research Center for Automatic Control (CRAN), Université de Lorraine–French National Scientific Research Center (CNRS), F-54000 Nancy, France; (J.D.); (M.I.); (D.B.); (A.D.); (H.S.)
| | | | - François Lux
- Light Matter Institute, UMR-5306, Université de Lyon–French National Scientific Research Center (CNRS), F-69000 Lyon, France; (P.R.); (F.L.); (O.T.)
| | - Céline Frochot
- Reactions and Chemical Engineering Laboratory (LRGP), UMR 7274, Université de Lorraine–French National Scientific Research Center (CNRS), F-54000 Nancy, France; (B.D.); (P.A.); (C.F.)
| | - Olivier Tillement
- Light Matter Institute, UMR-5306, Université de Lyon–French National Scientific Research Center (CNRS), F-69000 Lyon, France; (P.R.); (F.L.); (O.T.)
| | - Muriel Barberi-Heyob
- Department of Biology, Signals and Systems in Cancer and Neuroscience, UMR 7039 Research Center for Automatic Control (CRAN), Université de Lorraine–French National Scientific Research Center (CNRS), F-54000 Nancy, France; (J.D.); (M.I.); (D.B.); (A.D.); (H.S.)
- Correspondence: ; Tel.: +33-(0)3-72-74-61-14
| | - Hervé Schohn
- Department of Biology, Signals and Systems in Cancer and Neuroscience, UMR 7039 Research Center for Automatic Control (CRAN), Université de Lorraine–French National Scientific Research Center (CNRS), F-54000 Nancy, France; (J.D.); (M.I.); (D.B.); (A.D.); (H.S.)
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Gries M, Thomas N, Daouk J, Rocchi P, Choulier L, Jubréaux J, Pierson J, Reinhard A, Jouan-Hureaux V, Chateau A, Acherar S, Frochot C, Lux F, Tillement O, Barberi-Heyob M. Multiscale Selectivity and in vivo Biodistribution of NRP-1 -Targeted Theranostic AGuIX Nanoparticles for PDT of Glioblastoma. Int J Nanomedicine 2020; 15:8739-8758. [PMID: 33223826 PMCID: PMC7673487 DOI: 10.2147/ijn.s261352] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 08/27/2020] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Local recurrences of glioblastoma (GBM) after heavy standard treatments remain frequent and lead to a poor prognostic. Major challenges are the infiltrative part of the tumor tissue which is the ultimate cause of recurrence. The therapeutic arsenal faces the difficulty of eradicating this infiltrating part of the tumor tissue while increasing the targeting of tumor and endogenous stromal cells such as angiogenic endothelial cells. In this aim, neuropilin-1 (NRP-1), a transmembrane receptor mainly overexpressed by endothelial cells of the tumor vascular system and associated with malignancy, proliferation and migration of GBM, highlighted to be a relevant molecular target to promote the anti-vascular effect of photodynamic therapy (VTP). METHODS The multiscale selectivity was investigated for KDKPPR peptide moiety targeting NRP-1 and a porphyrin molecule as photosensitizer (PS), both grafted onto original AGuIX design nanoparticle. AGuIX nanoparticle, currently in Phase II clinical trials for the treatment of brain metastases with radiotherapy, allows to achieve a real-time magnetic resonance imaging (MRI) and an accumulation in the tumor area by EPR (enhanced permeability and retention) effect. Using surface-plasmon resonance (SPR), we evaluated the affinities of KDKPPR and scramble free peptides, and also peptides-conjugated AGuIX nanoparticles to recombinant rat and human NRP-1 proteins. For in vivo selectivity, we used a cranial window model and parametric maps obtained from T2*-weighted perfusion MRI analysis. RESULTS The photophysical characteristics of the PS and KDKPPR molecular affinity for recombinant human NRP-1 proteins were maintained after the functionalization of AGuIX nanoparticle with a dissociation constant of 4.7 μM determined by SPR assays. Cranial window model and parametric maps, both revealed a prolonged retention in the vascular system of human xenotransplanted GBM. Thanks to the fluorescence of porphyrin by non-invasive imaging and the concentration of gadolinium evaluated after extraction of organs, we checked the absence of nanoparticle in the brains of tumor-free animals and highlighted elimination by renal excretion and hepatic metabolism. CONCLUSION Post-VTP follow-ups demonstrated promising tumor responses with a prolonged delay in tumor growth accompanied by a decrease in tumor metabolism.
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Affiliation(s)
- Mickaël Gries
- Université de Lorraine, Centre National de la Recherche Scientifique (CNRS), Research Center for Automatic Control of Nancy (CRAN), Nancy, France
| | - Noémie Thomas
- Université de Lorraine, Centre National de la Recherche Scientifique (CNRS), Research Center for Automatic Control of Nancy (CRAN), Nancy, France
| | - Joël Daouk
- Université de Lorraine, Centre National de la Recherche Scientifique (CNRS), Research Center for Automatic Control of Nancy (CRAN), Nancy, France
| | - Paul Rocchi
- Université de Lyon, CNRS, Institut Lumière Matière, Lyon, France
| | - Laurence Choulier
- Université de Strasbourg, CNRS, Laboratory of Bioimaging and Pathologies, Illkirch, France
| | - Justine Jubréaux
- Université de Lorraine, Centre National de la Recherche Scientifique (CNRS), Research Center for Automatic Control of Nancy (CRAN), Nancy, France
| | - Julien Pierson
- Université de Lorraine, Centre National de la Recherche Scientifique (CNRS), Research Center for Automatic Control of Nancy (CRAN), Nancy, France
| | - Aurélie Reinhard
- Université de Lorraine, Centre National de la Recherche Scientifique (CNRS), Research Center for Automatic Control of Nancy (CRAN), Nancy, France
| | - Valérie Jouan-Hureaux
- Université de Lorraine, Centre National de la Recherche Scientifique (CNRS), Research Center for Automatic Control of Nancy (CRAN), Nancy, France
| | - Alicia Chateau
- Université de Lorraine, Centre National de la Recherche Scientifique (CNRS), Research Center for Automatic Control of Nancy (CRAN), Nancy, France
| | - Samir Acherar
- Université de Lorraine, CNRS, Laboratoire de Chimie-Physique Macromoléculaire, Nancy, France
| | - Céline Frochot
- Université de Lorraine, CNRS, Laboratoire Réactions et Génie des Procédés, Nancy, France
| | - François Lux
- Université de Lyon, CNRS, Institut Lumière Matière, Lyon, France
- Université de Strasbourg, CNRS, Laboratory of Bioimaging and Pathologies, Illkirch, France
- Université de Lorraine, CNRS, Laboratoire de Chimie-Physique Macromoléculaire, Nancy, France
- Université de Lorraine, CNRS, Laboratoire Réactions et Génie des Procédés, Nancy, France
- Institut Universitaire de France, Paris, France
| | | | - Muriel Barberi-Heyob
- Université de Lorraine, Centre National de la Recherche Scientifique (CNRS), Research Center for Automatic Control of Nancy (CRAN), Nancy, France
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Amouroux M, Salleron J, Huin-Schohn C, Ali S, Berthaud S, Rizo P, Schneider S, Vever-Bizet C, Bourg-Heckly G, Guillemin F, Le Coupanec P, Galbrun E, Daouk J, Daul C, Blondel W, Eschwège P. Clinical evaluation of a device providing simultaneous white-light and fluorescence video streams as well as panoramic imaging during fluorescence assisted-transurethral resection of bladder cancer. J Opt Soc Am A Opt Image Sci Vis 2019; 36:C62-C68. [PMID: 31873695 DOI: 10.1364/josaa.36.000c62] [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] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 09/25/2019] [Indexed: 06/10/2023]
Abstract
The current clinical study is aimed at evaluating the clinical relevance of an innovative device (called CyPaM2 device) that for the first time provides urologists with (i) a panoramic image of the bladder inner wall within the surgery time, and with (ii) a simultaneous (bimodal) display of fluorescence and white-light video streams during the fluorescence assisted-transurethral resection of bladder cancers procedure. The clinical relevance of this CyPaM2 device was evaluated on 10 patients according to three criteria (image quality, fluorescent lesions detection relevance, and ergonomics) compared with a reference medical device. Innovative features displayed by the CyPaM2 device were evaluated without any possible comparison: (i) simultaneous bimodal display of white-light and fluorescence video streams, (ii) remote light control, and (iii) time delay for the panoramic image building. The results highlight the progress to achieve in order to obtain a fully mature device ready for commercialization and the relevance of the innovative features proposed by the CyPaM2 device confirming their interest.
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Paquot H, Daouk J, Chateau A, Rétif P, Barberi-Heyob M, Pinela S. Radiation-Induced Mitotic Catastrophe Enhanced by Gold Nanoparticles: Assessment with a Specific Automated Image Processing Workflow. Radiat Res 2019; 192:13-22. [PMID: 31021734 DOI: 10.1667/rr14962.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In recent years, the use of gold-based nanoparticles in radiotherapy has been extensively studied, and the associated radiosensitization mechanism has been evaluated in a variety of in vitro studies. Given that mitotic catastrophe is widely involved in radiation-induced cell death, we evaluated the effect of gold nanoparticles on this key event. Most of the methods currently used to visualize and quantify morphological changes and multinucleation are manual. To circumvent this time-consuming step, we developed and optimized an image processing workflow (based on freely accessible software and plugins) for the automated quantification of mitotic catastrophes. We validated this approach in three cell lines by comparing the number of radiation-induced mitotic catastrophes detected using the automated and manual methods in the presence and absence of nanoparticles. With the Bland-Altman analysis, the automated and manual counting methods were found to be fully interchangeable. The ultimate goal of this work was to determine whether mitotic catastrophe was critically involved in radiationinduced cell death after prior exposure to gold nanoparticles. In the radioresistant U87 cell line, exposure to gold nanoparticles was associated with a shorter time course for the events related to mitotic catastrophe, which peaked at 96 h postirradiation. Mitotic catastrophe was dose-dependent in both the presence and absence of gold nanoparticles. These results demonstrate that cell exposure to gold nanoparticles led to an increase in mitotic catastrophe events, and confirm the marked radiosensitizing effect observed in clonogenic assays.
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Affiliation(s)
- Héna Paquot
- a Université de Lorraine, CNRS, CRAN, F-54000 Nancy, France
| | - Joël Daouk
- a Université de Lorraine, CNRS, CRAN, F-54000 Nancy, France
| | - Alicia Chateau
- a Université de Lorraine, CNRS, CRAN, F-54000 Nancy, France
| | - Paul Rétif
- a Université de Lorraine, CNRS, CRAN, F-54000 Nancy, France.,b CHR Metz-Thionville, F-57000 Metz, France
| | | | - Sophie Pinela
- a Université de Lorraine, CNRS, CRAN, F-54000 Nancy, France
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Héna P, Chateau A, Rétif P, Daouk J, Roux S, Barberi-Heyob M, Pinel S. PO-134 Radiosensitizing effect of gold-based nanoparticles for brain tumourtreatment. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.658] [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] Open
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Abstract
Background Changes in blood volume in the intracranial arteries and the resulting oscillations of brain parenchyma have been presumed as main initiating factors of cerebrospinal fluid (CSF) pulsations. However, respiration has been recently supposed to influence CSF dynamics via thoracic pressure changes. Purpose To measure blood and CSF cervical flow and quantify the contribution of cardiac and respiratory cycles on the subsequent signal evolution. Material and Methods Sixteen volunteers were enrolled. All participant underwent two-dimensional fast field echo echo planar imaging (FFE-EPI). Regions of interest were placed on internal carotids, jugular veins, and rachidian canal to extract temporal profiles. Spectral analysis was performed to extract respiratory and cardiac frequencies. The contribution of respiration and cardiac activity was assessed to signal evolution by applying a multiple linear model. Results Mean respiratory frequency was 14.6 ± 3.9 cycles per min and mean heart rate was 66.8 ± 9 cycles per min. Cardiac contribution was higher than breathing for internal carotids, explaining 74.68% and 10.27% of the signal variance, respectively. For the jugular veins, respiratory component was higher than the cardiac one contributing 44.28% and 6.53% of the signal variance, respectively. For CSF, breathing and cardiac component contributed less than half of signal variance (12.61% and 23.23%, respectively). Conclusion Respiration and cardiac activity both influence fluid flow at the cervical level. Arterial inflow is driven by the cardiac pool whereas venous blood aspiration seems more due to thoracic pressure changes. CSF dynamics acts as a buffer between these two blood compartments.
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Affiliation(s)
- Joël Daouk
- Bioflow Image Unit, Jules Verne University of Picardie, Amiens, France
| | - Roger Bouzerar
- Bioflow Image Unit, Jules Verne University of Picardie, Amiens, France
- Medical Image Processing Unit, Amiens University Medical Center, Amiens, France
| | - Olivier Baledent
- Bioflow Image Unit, Jules Verne University of Picardie, Amiens, France
- Medical Image Processing Unit, Amiens University Medical Center, Amiens, France
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Daouk J, Bouzerar R, Chaarani B, Zmudka J, Meyer ME, Balédent O. Use of dynamic (18)F-fluorodeoxyglucose positron emission tomography to investigate choroid plexus function in Alzheimer's disease. Exp Gerontol 2016; 77:62-8. [PMID: 26899566 DOI: 10.1016/j.exger.2016.02.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 02/03/2016] [Accepted: 02/15/2016] [Indexed: 12/11/2022]
Abstract
Choroid plexuses (CPs) are structures involved in CSF production and cerebral regulation and present atypical glucose metabolism. In addition, CPs impairment may be related to Alzheimer disease (AD). In the present study, we present the first results pointing out glucose metabolism in the CP with dynamic fluorodeoxyglucose positron emission tomography (dynamic (18)F-FDG-PET). We studied 47 elderly adults who were classified into three classes: healthy subjects (HS), amnestic mild cognitive impairment (aMCI) and AD. All participants have undergone dynamic (18)F-FDG-PET for 45 min. Acquisitions were divided into 34 frames to extract tissue time-activity curves (TTACs) in various structures including CSF and CPs. Results showed a decreased CPs (18)F-FDG metabolism in AD compared with aMCI and HS. Conversely, dynamic uptake was higher in CSF for AD compared with the other groups. ROC analysis showed that CPs TTACs are a promising tool as it yielded sensitivity of 85.7% and a specificity of 83.3%. Our study showed a disturbance of glucose exchange at the blood-CSF barrier level which is in favour of a key-role of the CPs in AD.
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Affiliation(s)
- Joël Daouk
- Bioflow Image, University of Picardie Jules Verne, Amiens, France.
| | - Roger Bouzerar
- Bioflow Image, University of Picardie Jules Verne, Amiens, France; Department of Medical Image Processing, Amiens University Hospital, Amiens, France
| | - Bader Chaarani
- Bioflow Image, University of Picardie Jules Verne, Amiens, France; Department of Medical Image Processing, Amiens University Hospital, Amiens, France; Department of Nuclear Medicine, Amiens University Hospital, Amiens, France
| | - Jadwiga Zmudka
- Bioflow Image, University of Picardie Jules Verne, Amiens, France; Department of Geriatry, Amiens University Hospital, Amiens, France
| | - Marc-Etienne Meyer
- Bioflow Image, University of Picardie Jules Verne, Amiens, France; Department of Nuclear Medicine, Amiens University Hospital, Amiens, France
| | - Olivier Balédent
- Bioflow Image, University of Picardie Jules Verne, Amiens, France; Department of Medical Image Processing, Amiens University Hospital, Amiens, France
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Promelle V, Daouk J, Bouzerar R, Jany B, Milazzo S, Balédent O. Ocular blood flow and cerebrospinal fluid pressure in glaucoma. Acta Radiol Open 2016; 5:2058460115624275. [PMID: 26962460 PMCID: PMC4765818 DOI: 10.1177/2058460115624275] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 11/16/2015] [Accepted: 12/01/2015] [Indexed: 11/08/2022] Open
Abstract
Disease mechanism underlying glaucoma remains unclear. Extensive research on this pathology has highlighted changes in vascular parameters and in circulation of the cerebrospinal fluid (CSF). Here, we review the most recent research on alterations in ocular blood flow and/or CSF flow in glaucoma. Ultrasound Doppler imaging studies have shown an increased resistive index in ophthalmic artery’s in glaucoma. Furthermore, changes in optic nerve CSF circulation, which can be assessed with magnetic resonance imaging, may lead to a greater translaminar pressure difference, mechanical stress, and poor clearance of toxic substances. This constitutes a new approach for understanding blood–CSF interactions involved in glaucoma.
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Affiliation(s)
- Véronique Promelle
- Ophthalmology Department, Amiens University Medical Center, Amiens, France
| | - Joël Daouk
- Bioflow Image Unit, Jules Verne University of Picardie, Amiens, France
| | - Roger Bouzerar
- Bioflow Image Unit, Jules Verne University of Picardie, Amiens, France; Medical Image Processing Unit, Amiens University Medical Center, Amiens, France
| | - Benjamin Jany
- Ophthalmology Department, Amiens University Medical Center, Amiens, France
| | - Solange Milazzo
- Ophthalmology Department, Amiens University Medical Center, Amiens, France
| | - Olivier Balédent
- Bioflow Image Unit, Jules Verne University of Picardie, Amiens, France; Medical Image Processing Unit, Amiens University Medical Center, Amiens, France
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Daouk J, Bailly P, Meyer ME. Quantization accuracy of short-duration respiratory-gated PET/CT acquisitions. Phys Med 2015; 31:1092-1097. [DOI: 10.1016/j.ejmp.2015.08.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 08/18/2015] [Accepted: 08/19/2015] [Indexed: 11/16/2022] Open
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Daouk J, Bailly P, Kamimura M, Sacksick D, Jounieaux V, Meyer ME. Positron emission tomography-based evidence of low-amplitude respiratory motion in patients with chronic obstructive pulmonary disease. Ann Nucl Med 2015; 29:319-24. [DOI: 10.1007/s12149-014-0945-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 12/23/2014] [Indexed: 10/24/2022]
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Benathan-Tordjmann J, Bailly P, Meyer ME, Daouk J. Cerebral arterial inflow assessment with 18F-FDG PET: methodology and feasibility. Comput Methods Programs Biomed 2014; 116:177-183. [PMID: 25015567 DOI: 10.1016/j.cmpb.2014.06.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 06/12/2014] [Accepted: 06/17/2014] [Indexed: 06/03/2023]
Abstract
Positron emission tomography (PET) with 18fluorodeoxyglucose (18F-FDG) is increasingly used in neurology. The measurement of cerebral arterial inflow (QA) using 18F-FDG complements the information provided by standard brain PET imaging. Here, injections were performed after the beginning of dynamic acquisitions and the time to arrival (t0) of activity in the gantry's field of view was computed. We performed a phantom study using a branched tube (internal diameter: 4mm) and a 18F-FDG solution injected at 240 mL/min. Data processing consisted of (i) reconstruction of the first 3s after t0, (ii) vascular signal enhancement and (iii) clustering. This method was then applied in four subjects. We measured the volumes of the tubes or vascular trees and calculated the corresponding flows. In the phantom, the flow was calculated to be 244.2 mL/min. In each subject, our QA value was compared with that obtained by quantitative cine-phase contrast magnetic resonance imaging; the mean QA value of 581.4±217.5 mL/min calculated with 18F-FDG PET was consistent with the mean value of 593.3±205.8 mL/min calculated with quantitative cine-phase contrast magnetic resonance imaging. Our 18F-FDG PET method constitutes a novel, fully automatic means of measuring QA.
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Affiliation(s)
- Jennifer Benathan-Tordjmann
- Service de médecine nucléaire et de traitement de l'image médicale, Centre Hospitalier Universitaire d'Amiens, Amiens, France
| | - Pascal Bailly
- Service de médecine nucléaire et de traitement de l'image médicale, Centre Hospitalier Universitaire d'Amiens, Amiens, France.
| | - Marc-Etienne Meyer
- Service de médecine nucléaire et de traitement de l'image médicale, Centre Hospitalier Universitaire d'Amiens, Amiens, France; Université de Picardie Jules Verne, Amiens, France
| | - Joël Daouk
- Université de Picardie Jules Verne, Amiens, France
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Daouk J, Chaarani B, Zmudka J, Capel C, Fichten A, Bouzerar R, Gondry-Jouet C, Jouanny P, Balédent O. Relationship between cerebrospinal fluid flow, ventricles morphology, and DTI properties in internal capsules: differences between Alzheimer's disease and normal-pressure hydrocephalus. Acta Radiol 2014; 55:992-9. [PMID: 24136984 DOI: 10.1177/0284185113508112] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Normal-pressure hydrocephalus (NPH) and Alzheimer's disease (AD) have some similar clinical features and both involve white matter and cerebrospinal fluid (CSF) disorders. PURPOSE To compare putative relationships between ventricular morphology, CSF flow, and white matter diffusion in AD and NPH. MATERIAL AND METHODS Thirty patients (18 with AD and 12 with suspected NPH) were included in the study. All patients underwent a 3-Tesla MRI scan, which included phase-contrast MRI of the aqueduct (to assess the aqueductal CSF stroke volume) and a DTI session (to calculate the fractional anisotropy [FA] and apparent diffusion coefficient [ADC]) in the internal capsules). RESULTS FA was correlated with ventricular volume in the suspected NPH population (P < 0.001; rs = 0.88), whereas the ADC was highly correlated with the aqueductal CSF stroke volume in AD (P < 0.001; rs = 0.79). CONCLUSION Although AD and NPH both involve CSF disorders, the two diseases do not have the same impact on the internal capsules. The magnitude of the ADC is related to the aqueductal CSF stroke volume in AD, whereas FA is related to ventricular volume in NPH.
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Affiliation(s)
- Joël Daouk
- Bioflow Image Laboratory, University of Picardie Jules Verne, France
| | - Bader Chaarani
- Bioflow Image Laboratory, University of Picardie Jules Verne, France
- Medical Image Processing Unit, Amiens University Hospital, France
| | - Jadwiga Zmudka
- Bioflow Image Laboratory, University of Picardie Jules Verne, France
- Geriatric Department, Amiens University Hospital, France
| | - Cyrille Capel
- Neurosurgery Department, Amiens Univwsersity Hospital, France
| | - Anthony Fichten
- Neurosurgery Department, Amiens Univwsersity Hospital, France
| | - Roger Bouzerar
- Bioflow Image Laboratory, University of Picardie Jules Verne, France
- Medical Image Processing Unit, Amiens University Hospital, France
| | - Catherine Gondry-Jouet
- Bioflow Image Laboratory, University of Picardie Jules Verne, France
- Radiology Department, Amiens University Hospital, France
| | - Pierre Jouanny
- Bioflow Image Laboratory, University of Picardie Jules Verne, France
- Geriatric Department, Amiens University Hospital, France
| | - Olivier Balédent
- Bioflow Image Laboratory, University of Picardie Jules Verne, France
- Medical Image Processing Unit, Amiens University Hospital, France
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Pépin A, Daouk J, Bailly P, Hapdey S, Meyer ME. Response to the letter ‘On noting the achievements and future potential of data-driven gating for respiratory motion correction in PET imaging’. Nucl Med Commun 2014; 35:893-4. [DOI: 10.1097/mnm.0000000000000148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Leclercq C, Roussel M, Durand-Birchenall J, Bryer-Le Breton C, Barbay M, Daouk J, Godefroy O. Localisations lésionnelles associées au ralentissement post-AVC : étude GRECOG-VASC. Rev Neurol (Paris) 2014. [DOI: 10.1016/j.neurol.2014.01.087] [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: 10/25/2022]
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Bryer-Le Breton C, Godefroy O, Roussel M, Daouk J, Barbay M. Intérêt du MMSE et du MoCA pour le repérage des déficits cognitifs post accident vasculaire cérébral. Rev Neurol (Paris) 2014. [DOI: 10.1016/j.neurol.2014.01.521] [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: 10/25/2022]
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Durand-Birchenall J, Leclercq C, Daouk J, Monet P, Godefroy O, Bugnicourt JM. Régression des anomalies de substance blanche après un AVC lacunaire. Rev Neurol (Paris) 2012. [DOI: 10.1016/j.neurol.2012.01.212] [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: 10/28/2022]
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Durand-Birchenall J, Leclercq C, Daouk J, Monet P, Godefroy O, Bugnicourt JM. Attenuation of brain white matter lesions after lacunar stroke. Int J Prev Med 2012; 3:134-8. [PMID: 22347611 PMCID: PMC3278879] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2011] [Accepted: 01/09/2012] [Indexed: 10/27/2022] Open
Abstract
White matter lesions (WMLs) are commonly observed in stroke patients with small vessel disease (SVD) and are thought to result from a progressive, irreversible disease process following arteriolosclerosis. In this study, we report a case of partial disappearance of WMLs 1 year after a lacunar stroke in a 69-year-old man with evidence of SVD. We also discuss possible mechanisms associated with this observation.
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Affiliation(s)
| | - Claire Leclercq
- Department of Neurology, Amiens University Hospital, Amiens, France
| | - Joël Daouk
- Image Processing Laboratory, Medical School, University of Picardy Jules Verne, Amiens, France
| | - Pauline Monet
- Department of Radiology, Amiens University Hospital, Amiens, France
| | - Olivier Godefroy
- Department of Neurology and Laboratory of Functional Neurosciences, Amiens University Hospital, Amiens, France
| | - Jean-Marc Bugnicourt
- Department of Neurology and Laboratory of Functional Neurosciences, Amiens University Hospital, Amiens, France,INSERM ERI 12, Amiens University Hospital, Amiens, France,Correspondence to: Dr. JM Bugnicourt, Department of Neurology, Amiens University Hospital, Place Victor Pauchet, F-80054 Amiens, France. E-mail:
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Daouk J, Leloire M, Fin L, Bailly P, Morvan J, El Esper I, Saidi L, Moullart V, François G, Jounieaux V, Meyer ME. Respiratory-gated 18F-FDG PET imaging in lung cancer: effects on sensitivity and specificity. Acta Radiol 2011; 52:651-7. [PMID: 21511870 DOI: 10.1258/ar.2011.110018] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND Respiratory motion is known to deteriorate positron emission tomography (PET) images and may lead to potential diagnostic errors when a standardized uptake value (SUV) cut-off threshold is used to discriminate between benign and malignant lesions. PURPOSE To evaluate and compare ungated and respiratory-gated 18F-fluorodeoxyglucose PET/computed tomography (CT) methods for the characterization of pulmonary nodules. MATERIAL AND METHODS The list-mode acquisition during respiratory-gated PET was combined with a short breath-hold CT scan to form the CT-based images. We studied 48 lesions in 43 patients. PET images were analyzed in terms of the maximum SUV (SUV(max)) and the lesion location. RESULTS Using receiver-operating characteristic (ROC) curves, the optimal SUV cut-off thresholds for the ungated and CT-based methods were calculated to be 2.0 and 2.2, respectively. The corresponding sensitivity values were 83% and 92%, respectively, with a specificity of 67% for both methods. The two methods gave equivalent performance levels for the upper and middle lobes (sensitivity 93%, specificity 62%). They differed for the lower lobes, where the CT-based method outperformed the ungated method (sensitivity values of 90% and 70%, respectively, and a specificity of 73% with both methods) - especially for lesions smaller than 15 mm. CONCLUSION The CT-based method increased sensitivity and did not diminish specificity, compared with the ungated method. It was more efficient than the ungated method for imaging the lower lobes and smallest lesions, which are most affected by respiratory motion.
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Affiliation(s)
- Joël Daouk
- Nuclear Medicine Department Amiens University Hospital, Amiens
- Medical School, University of Picardy Jules Verne, Amiens
| | - Marie Leloire
- Medical School, University of Picardy Jules Verne, Amiens
| | - Loïc Fin
- Clinical Trial and Innovation Department, Amiens University Hospital, Amiens
| | - Pascal Bailly
- Nuclear Medicine Department Amiens University Hospital, Amiens
| | - Julie Morvan
- Nuclear Medicine Department Amiens University Hospital, Amiens
- Medical School, University of Picardy Jules Verne, Amiens
| | - Isabelle El Esper
- Nuclear Medicine Department Amiens University Hospital, Amiens
- Medical School, University of Picardy Jules Verne, Amiens
| | - Lazhar Saidi
- Nuclear Medicine Department Amiens University Hospital, Amiens
| | | | - Géraldine François
- Department of Respiratory Medicine, Amiens University Hospital, Amiens, France
| | - Vincent Jounieaux
- Medical School, University of Picardy Jules Verne, Amiens
- Department of Respiratory Medicine, Amiens University Hospital, Amiens, France
| | - Marc-Etienne Meyer
- Nuclear Medicine Department Amiens University Hospital, Amiens
- Medical School, University of Picardy Jules Verne, Amiens
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Fin L, Bailly P, Daouk J, Meyer ME. Motion correction based on an appropriate system matrix for statistical reconstruction of respiratory-correlated PET acquisitions. Comput Methods Programs Biomed 2009; 96:e1-e9. [PMID: 19487044 DOI: 10.1016/j.cmpb.2009.05.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Revised: 03/13/2009] [Accepted: 05/01/2009] [Indexed: 05/27/2023]
Abstract
Respiratory motion correction in positron emission tomography (PET) seeks to incorporate motion information into an image reconstruction algorithm by using the full counting statistics of an acquisition to generate a single, motion-free volume. Here, we present a motion-incorporated ordered subsets expectation maximization (MOSEM) reconstruction based on a device-dedicated tomographic projector in which each matrix element is calculated directly from the voxels' Cartesian coordinates alone. The motion is corrected by updating this projector as a function of the respiratory level. The performance of the reconstruction method was investigated with three datasets: two simulations of a transaxially or axially moving lesion on a patient acquisition and a third acquisition of a moving sphere. After the 16th sub-iteration, the normalized mean square error (NMSE, with a motionless acquisition as reference) was 0.20 for the non-corrected (ungated) image and 0.01 for the MOSEM image with transaxial motion simulation. Likewise, NMSE was 0.30 for the ungated image and 0.03 for MOSEM image with axial motion simulation. For the phantom, ungated reconstruction yielded an error of 0.78, whereas MOSEM yielded 0.43. The error reduction resulted from enhancement and reduced spreading of the moving uptake. Our results show that MOSEM reconstruction yields motion-corrected images which are similar to motionless reference images.
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Affiliation(s)
- Loïc Fin
- Nuclear Medicine Department, Amiens University Medical Center, France
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Fin L, Bailly P, Daouk J, Meyer ME. A practical way to improve contrast-to-noise ratio and quantitation for statistical-based iterative reconstruction in whole-body PET imaging. Med Phys 2009; 36:3072-9. [PMID: 19673206 DOI: 10.1118/1.3152116] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
In whole-body positron emission tomography (PET) imaging, the detection of small uptake foci (i.e., around two or three times the tomograph's spatial resolution) is a critical issue. Indeed, spatial resolution is altered by postreconstruction smoothing operations used to reduce the noise introduced by (among other things) an inaccurate system matrix. The authors previously proposed a device-dedicated projector, easily applicable on a clinical gantry, based on point-source measurements, which introduces less noise than a geometrical model. In the present study, they took advantage of the lower noise levels by reducing the postfilter and then quantified the approach's impact on image quality. This study was performed on an IEC Body Phantom Set filled with 18F (sphere-to-background activity ratio: 4:1). The same 3 min acquisition was reconstructed with either (i) a clinical system based on a geometrical tomographic operator (OSEM_CL) or (ii) an OSEM algorithm using the suggested system matrix (OSEM_DR). In order to compare the resulting images, they set the 3D Gaussian postfilter (3DGPF) for OSEM_DR so as to obtain similar background signal-to-noise ratio (SNR) to that of OSEM_CL with a Gaussian postfilter full width at half maximum of 5 mm (as recommended for whole-body imaging on a Biograph6). They then assessed the contrast-to-noise ratio (CNR) and quantitation [contrast recovery (CR)] for the phantom's four smallest spheres (with internal diameters of 10, 13, 17, and 22 mm). Evaluation of 3DGPFs ranging from 2.2 to 2.6 mm showed that a value of 2.4 mm in OSEM_DR gave the closest background SNR to that of OSEM_CL with a 3DGPF of 5 mm. For all studied targets, the CNR was higher with OSEM_DR than with OSEM_CL. For the 10 and 13 mm spheres, OSEM_DR increased the size of the CNR peaks by 37% and 20%, relative to OSEM_CL. The OSEM_DR technique yielded higher CR values than OSEM_CL did. For the 10, 13, 17, and 22 mm spheres, the CR values at eight iterations were 0.5, 0.6, 1.1, and 1.0 for OSEM_DR and 0.3, 0.4, 0.9, and 0.8 for OSEM_CL. They evaluated a practical method for determining a device-dedicated system matrix based on point-source acquisitions. This tomographic operator is more realistic than geometrical system matrix and introduces less noise into PET images during statistical reconstruction; it thus reduces the extent of postfiltering operations required. Thus, spatial resolution is better maintained with OSEM_DR than with clinical reconstruction. They showed that this method improves the contrast-to-noise ratio and quantification of uptake foci (especially those that are at the system's limit of detection) and, in a clinical context, could allow better detection and earlier diagnosis.
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Affiliation(s)
- Loïc Fin
- Department of Nuclear Medicine, University Medical Center, Amiens F-80054, France
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Daouk J, Fin L, Bailly P, Meyer ME. Respiratory-gated positron emission tomography and breath-hold computed tomography coupling to reduce the influence of respiratory motion: methodology and feasibility. Acta Radiol 2009; 50:144-55. [PMID: 19096952 DOI: 10.1080/02841850802627437] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Respiratory motion causes uptake in positron emission tomography (PET) images of chest and abdominal structures to be blurred and reduced in intensity. PURPOSE To compare two respiratory-gated PET binning methods (based on frequency and amplitude analyses of the respiratory signal) and to propose a "BH-based" method based on an additional breath-hold computed tomography (CT) acquisition. MATERIAL AND METHODS Respiratory-gated PET consists in list-mode (LM) acquisition with simultaneous respiratory signal recording. A phantom study featured rectilinear movement of a 0.5-ml sphere filled with (18)F-fluorodeoxyglucose ((18)F-FDG) solution, placed in a radioactive background (sphere-to-background contrast 6:1). Two patients were also examined. Three figures of merit were calculated: the target-to-background ratio profile (TBRP) in the axial direction through the uptake (i.e., the sphere or lesion), full-width-at-half-maximum (FWHM) values, and maximized standard uptake values (SUV(max)). RESULTS In the phantom study, the peak TBRP was 0.9 for non-gated volume, 1.83 for BH-based volume, and varied between 1.13 and 1.73 for Freq-based volumes and between 1.34 and 1.66 for Amp-based volumes. A reference volume (REF-static) was also acquired for the phantom (in a static, "expiratory" state), with a peak TBRP at 1.88. TBRPs were computed for patient data, with higher peak values for all gated volumes than for non-gated volumes. CONCLUSION Respiratory-gated PET acquisition reduces the blurring effect and increases image contrast. However, Freq-based and Amp-based volumes are still influenced by inappropriate attenuation correction and misregistration of mobile lesions on CT images. The proposed BH-based method both reduces motion artifacts and improves PET-CT registration.
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Affiliation(s)
- J. Daouk
- Department of Nuclear Medicine, University Hospital, Amiens, France
| | - L. Fin
- Department of Nuclear Medicine, University Hospital, Amiens, France
| | - P. Bailly
- Department of Nuclear Medicine, University Hospital, Amiens, France
| | - M.-E. Meyer
- Department of Nuclear Medicine, University Hospital, Amiens, France
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Vermandel M, Fin L, Hapdey S, Bol A, Betrouni N, Daouk J, Gardi I, Lee J, Jounwaz R, Rousseau J, Huglo D. An easy-to-use phantom and protocol for weekly PET quality assessment: a multicenter study. Med Phys 2008; 35:3922-34. [PMID: 18841843 DOI: 10.1118/1.2964091] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The authors have developed a simple phantom and dedicated software for the quality assessment of positron emission tomography (PET) scanners. The phantom is a parallelepiped box filled with a relatively low activity 18FDG solution and in which simple test objects are placed. Various image quality parameters are checked, including signal-to-noise ratio, image uniformity, slice thickness, slice sensitivity profile, spatial resolution, and dose calibration accuracy. Automatic image analysis consists in detecting surfaces and objects, defining regions of interest, acquiring reference point coordinates, and establishing gray-scale profiles. The total time needed for quality assessment (preparation and image acquisition) is less than 15 min with 37 MBq (1 mCi) 18FDG. The system's ease of use encourages frequent image quality assessment-for example, the comparison of PET scanners in interdepartment studies and the monitoring and evaluation of possible drifts over time. By way of an example, the authors present weekly quality assessment results obtained over up to 7 months at four PET facilities.
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Affiliation(s)
- M Vermandel
- Inserm, U703, Institute of Medical Technology, University Hospital of Lille, 59037, Lille, France.
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Daouk J, Fin L, Bailly P, Meyer ME. Improved attenuation correction via appropriate selection of respiratory-correlated PET data. Comput Methods Programs Biomed 2008; 92:90-98. [PMID: 18676054 DOI: 10.1016/j.cmpb.2008.06.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2008] [Revised: 05/30/2008] [Accepted: 06/25/2008] [Indexed: 05/26/2023]
Abstract
PURPOSE We propose a respiratory-correlated PET data processing method (called "BH-CT-based") based on breath-hold CT acquisition to reduce the smearing effect and improve the attenuation correction. The resulting images are compared with the ungated PET images acquired using a standard, free-breathing clinical protocol. METHODS The BH-CT-based method consisted of a list-mode acquisition with simultaneous respiratory signal recording. An additional breath-hold CT acquisition was also performed in order to define a tissue position from which PET events can be selected. A phantom study featured a 0.5-ml sphere (filled with 18F-fluorodeoxyglucose ((18)F-FDG) solution) pushed onto a rubber balloon (filled with (18)F-FDG solution and iodinated contrast agent). The feasibility of the BH-CT-based method was also assessed in two patients. RESULTS In the phantom study, the contrast-to-noise ratios (CNRs) were -1.6 for the Ungated volume and 5.1 for the BH-CT-based volume. For patients, CNRs were higher for BH-CT-based volumes than those for Ungated volumes (17.3 vs. 6.3 and 7.3 vs. 3.8, for patients 1 and 2, respectively). Bias-variance measurements were performed and yielded bias reduction of 40% with BH-CT-based. CONCLUSION The application of a BH-CT-based method decreases motion bias in PET images. This method resolves issues related to both PET-to-CT misregistration and erroneous attenuation correction and increases lesion detectability.
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Affiliation(s)
- Joël Daouk
- Nuclear Medicine Department, Amiens University Medical Center, Amiens, France
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Fin L, Daouk J, Morvan J, Bailly P, El Esper I, Saidi L, Meyer ME. Initial clinical results for breath-hold CT-based processing of respiratory-gated PET acquisitions. Eur J Nucl Med Mol Imaging 2008; 35:1971-80. [DOI: 10.1007/s00259-008-0858-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2008] [Accepted: 05/28/2008] [Indexed: 12/22/2022]
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