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Baubeta E, Laurin Gadsböll E, Will L, Holmquist F, Aurumskjöld M. No gadolinium K-edge detected on the first clinical photon-counting computed tomography scanner. J Appl Clin Med Phys 2024; 25:e14324. [PMID: 38470449 PMCID: PMC11005964 DOI: 10.1002/acm2.14324] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 02/01/2024] [Accepted: 02/12/2024] [Indexed: 03/13/2024] Open
Abstract
PURPOSE This study aimed to elucidate whether gadolinium contrast in clinically relevant doses can be used with photon-counting computed tomography (PCCT) as an alternative contrast agent in clinical applications. MATERIAL/METHODS A CTDI phantom with 3D printed rods filled with different concentrations of gadolinium and iodine contrast was scanned in a PCCT and an energy-integrated computed tomography (EICT). Attenuation values at different monoenergetic steps were extracted for each contrast concentration. RESULTS For PCCT, gadolinium reached an attenuation >100 HU (103 HU) at 40 keV with a concentration 5 mmol/L whereas the same level was reached at 50 keV (118 HU) for 10 mmol/L and 90 keV (114 HU) for 25 mmol/L. For iodine, the same level of attenuation was reached at 100 keV (106 HU) with a concentration 8.75 mg I/mL. For EICT the lowest gadolinium contrast concentration needed to reach >100 HU (108 HU) was 10 mmol/L at 50 keV. For 25 mmol/L 100 HU was reached at 100 keV. For iodine contrast 108 HU was reached at 110 keV for 8.75 mg I/mL. CONCLUSION No K-edge potential or difference in attenuation curves between iodine and gadolinium contrast is detected on the first clinical available PCCT. Clinically relevant attenuation levels were barely achieved in this setting with gadolinium concentrations approved for human use. The results of this study suggest that, given current scanning technology, gadolinium is not a clinically useful contrast agent for computed tomography because no K-edge was detected.
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Affiliation(s)
- Erik Baubeta
- Department of Imaging and Functional MedicineSkåne University HospitalLundSweden
- Department of Translational MedicineDiagnostic RadiologyLund UniversityMalmöSweden
| | - Eva Laurin Gadsböll
- Department of Imaging and Functional MedicineSkåne University HospitalLundSweden
| | - Leon Will
- Department of Imaging and Functional MedicineSkåne University HospitalLundSweden
| | - Fredrik Holmquist
- Department of Imaging and Functional MedicineSkåne University HospitalLundSweden
- Department of Clinical SciencesDiagnostic RadiologyLund UniversityLundSweden
| | - Marie‐Louise Aurumskjöld
- Medical Radiation PhysicsDepartment of Clinical Sciences MalmöSkåne University HospitalLund UniversityLundSweden
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Xie D, Rong J, Cai Z, Guo P, Nan Y, Zhou J. Acute localised exanthematous pustulosis (ALEP)-induced by ioversol. Contact Dermatitis 2024; 90:197-198. [PMID: 37994163 DOI: 10.1111/cod.14465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/12/2023] [Accepted: 11/13/2023] [Indexed: 11/24/2023]
Affiliation(s)
- Dong Xie
- Department of First Clinical College of Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
- Department of Neurosurgery, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Jian Rong
- Department of First Clinical College of Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
- Department of Neurosurgery, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Zhibiao Cai
- Department of Neurosurgery, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Penghang Guo
- Department of First Clinical College of Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou, China
- Department of Neurosurgery, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Yaqiang Nan
- Department of Neurosurgery, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Jie Zhou
- Department of Neurosurgery, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou, China
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Said M, Tavakoli C, Dumot C, Toupet K, Dong YC, Collomb N, Auxenfans C, Moisan A, Favier B, Chovelon B, Barbier EL, Jorgensen C, Cormode DP, Noël D, Brun E, Elleaume H, Wiart M, Detante O, Rome C, Auzély-Velty R. A novel injectable radiopaque hydrogel with potent properties for multicolor CT imaging in the context of brain and cartilage regenerative therapy. bioRxiv 2023:2023.04.20.537520. [PMID: 37131613 PMCID: PMC10153246 DOI: 10.1101/2023.04.20.537520] [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] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Cell therapy is promising to treat many conditions, including neurological and osteoarticular diseases. Encapsulation of cells within hydrogels facilitates cell delivery and can improve therapeutic effects. However, much work remains to be done to align treatment strategies with specific diseases. The development of imaging tools that enable monitoring cells and hydrogel independently is key to achieving this goal. Our objective herein is to longitudinally study an iodine-labeled hydrogel, incorporating gold-labeled stem cells, by bicolor CT imaging after in vivo injection in rodent brains or knees. To this aim, an injectable self-healing hyaluronic acid (HA) hydrogel with long-persistent radiopacity was formed by the covalent grafting of a clinical contrast agent on HA. The labeling conditions were tuned to achieve sufficient X-ray signal and to maintain the mechanical and self-healing properties as well as injectability of the original HA scaffold. The efficient delivery of both cells and hydrogel at the targeted sites was demonstrated by synchrotron K-edge subtraction-CT. The iodine labeling enabled to monitor the hydrogel biodistribution in vivo up to 3 days post-administration, which represents a technological first in the field of molecular CT imaging agents. This tool may foster the translation of combined cell-hydrogel therapies into the clinics.
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Affiliation(s)
- Moustoifa Said
- Univ. Grenoble Alpes, Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), 38041 Grenoble, France; Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France
| | - Clément Tavakoli
- Univ. Lyon 1, Inserm U1060, CarMeN Laboratory, 69600 Oullins, France; Univ. Grenoble Alpes, Inserm, UA7 Strobe, 38000 Grenoble, France
| | - Chloé Dumot
- Univ. Lyon 1, Inserm U1060, CarMeN Laboratory, 69600 Oullins, France
| | - Karine Toupet
- IRMB, Univ. Montpellier, INSERM, CHU Montpellier, Montpellier, France
| | - Yuxi Clara Dong
- Department of Radiology and Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Nora Collomb
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France
| | | | - Anaïck Moisan
- Cell Therapy and Engineering Unit, EFS Rhone Alpes, 38330 Saint Ismier, France
| | - Bertrand Favier
- Univ. Grenoble Alpes, Translational Innovation in Medicine & Complexity, UMR552, 38700 La Tronche, France
| | - Benoit Chovelon
- Univ. Grenoble-Alpes, Departement de Pharmacochimie Moleculaire UMR 5063, 38400 Grenoble, France; Institut de Biologie et Pathologie, CHU de Grenoble-Alpes, 38700 La Tronche, France
| | - Emmanuel Luc Barbier
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France
| | | | - David Peter Cormode
- Department of Radiology and Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Danièle Noël
- IRMB, Univ. Montpellier, INSERM, CHU Montpellier, Montpellier, France
| | - Emmanuel Brun
- Univ. Grenoble Alpes, Inserm, UA7 Strobe, 38000 Grenoble, France
| | - Hélène Elleaume
- Univ. Grenoble Alpes, Inserm, UA7 Strobe, 38000 Grenoble, France
| | - Marlène Wiart
- Univ. Lyon 1, Inserm U1060, CarMeN Laboratory, 69600 Oullins, France
| | - Olivier Detante
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France; CHU Grenoble Alpes, Stroke Unit, Department of Neurology, 38043 Grenoble, France
| | - Claire Rome
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France
| | - Rachel Auzély-Velty
- Univ. Grenoble Alpes, Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), 38041 Grenoble, France
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Morisaka H, Matsuura K, Yamaguchi H, Ichikawa T, Onishi H. Effect of decreased contrast injection flow rate on aortic enhancement in 80-KV peak CT with contrast dose reduction. Acta Radiol 2021; 64:353-359. [PMID: 34923851 DOI: 10.1177/02841851211067144] [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] [Indexed: 11/16/2022]
Abstract
BACKGROUND Effect of decreased injection flow rate of contrast agent at the same iodine dose and delivery rate on aortic enhancement has not been clearly elucidated. PURPOSE To evaluate the effect of decreased injection flow rate of contrast agent on aortic peak enhancement in a dynamic flow phantom and on aortic enhancement in clinical dynamic 80-kVp computed tomography (CT) with contrast dose reduction. MATERIAL AND METHODS In the dynamic flow phantom experiment, the effect of a decreased injection flow rate at the same total iodine dose and delivery rate on simulated aortic peak enhancement was evaluated. In the clinical retrospective study, we searched 312 patients with renal dysfunction who underwent an 80-kVp abdominal dynamic CT with 40% reduction of contrast agent from a standard 120-kVp protocol and measured the aortic enhancement at the level of the hepatic hilum. Independent predictors for aortic enhancement were determined by multiple linear regression analysis, and after adjustment of significant predictors, independent variables for acquiring optimal aortic enhancement, ≥300 HU, were determined by multiple logistic regression analysis. RESULTS In the phantom experiment, decreased flow rate showed a significant but small descent effect (6%-9%) on simulated aortic peak enhancement. In the multiple linear regression analysis, only age was an independent predictor of aortic enhancement; there was no independent predictor for optimal age-adjusted aortic enhancement of ≥300 HU. CONCLUSIONS Decreased injection flow rate had a small influence on aortic enhancement in vitro but had no significant effect on the aortic enhancement in clinical dynamic 80-kVp CT.
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Affiliation(s)
- Hiroyuki Morisaka
- Department of Radiology, University of Yamanashi, Chuo, Yamanashi, Japan
- Diagnostic Radiology, Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - Koichiro Matsuura
- Diagnostic Radiology, Saitama Medical University International Medical Center, Hidaka, Saitama, Japan
| | - Haruomi Yamaguchi
- Department of Radiology, Graduate School of Medicine, University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Tomoaki Ichikawa
- Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - Hiroshi Onishi
- Department of Radiology, University of Yamanashi, Chuo, Yamanashi, Japan
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Sun MZ, Chen HM, Zhou ZW, Jin H, Ji YQ, Ji JW, Fu QP, Zhang LZ, Wu QQ, Ju HX. Neutrophil gelatinase-associated apolipoprotein in patients with iodine-contrast nephropathy. J BIOL REG HOMEOS AG 2019; 33:1171-1176. [PMID: 31332985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- M Z Sun
- Department of Clinical Laboratory, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, Jiangsu, People's Republic of China
| | - H M Chen
- Department of Clinical Laboratory, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, Jiangsu, People's Republic of China
| | - Z W Zhou
- Department of Clinical Laboratory, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, Jiangsu, People's Republic of China
| | - H Jin
- Department of Clinical Laboratory, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, Jiangsu, People's Republic of China
| | - Y Q Ji
- Department of Clinical Laboratory, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, Jiangsu, People's Republic of China
| | - J W Ji
- Department of Clinical Laboratory, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, Jiangsu, People's Republic of China
| | - Q P Fu
- Department of Clinical Laboratory, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, Jiangsu, People's Republic of China
| | - L Z Zhang
- Department of Clinical Laboratory, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, Jiangsu, People's Republic of China
| | - Q Q Wu
- Department of Clinical Laboratory, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, Jiangsu, People's Republic of China
| | - H X Ju
- Department of Clinical Laboratory, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, Jiangsu, People's Republic of China
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Gaikwad H, Tsvirkun D, Ben-Nun Y, Merquiol E, Popovtzer R, Blum G. Molecular Imaging of Cancer Using X-ray Computed Tomography with Protease Targeted Iodinated Activity-Based Probes. Nano Lett 2018; 18:1582-1591. [PMID: 29470072 PMCID: PMC6192665 DOI: 10.1021/acs.nanolett.7b03813] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 01/22/2018] [Indexed: 05/20/2023]
Abstract
X-ray computed tomography (CT) is a robust, precise, fast, and reliable imaging method that enables excellent spatial resolution and quantification of contrast agents throughout the body. However, CT is largely inadequate for molecular imaging applications due mainly to its low contrast sensitivity that forces the use of large concentrations of contrast agents for detection. To overcome this limitation, we generated a new class of iodinated nanoscale activity-based probes (IN-ABPs) that sufficiently accumulates at the target site by covalently binding cysteine cathepsins that are exceptionally highly expressed in cancer. The IN-ABPs are comprised of a short targeting peptide selective to specific cathepsins, an electrophilic moiety that allows activity-dependent covalent binding, and tags containing dendrimers with up to 48 iodine atoms. IN-ABPs selectively bind and inhibit activity of recombinant and intracellular cathepsin B, L, and S. We compared the in vivo kinetics, biodistribution, and tumor accumulation of IN-ABPs bearing 18 and 48 iodine atoms each, and their control counterparts lacking the targeting moiety. Here we show that although both IN-ABPs bind specifically to cathepsins within the tumor and produce detectable CT contrast, the 48-iodine bearing IN-ABP was found to be optimal with signals over 2.1-fold higher than its nontargeted counterpart. In conclusion, this study shows the synthetic feasibility and potential utility of IN-ABPs as potent contrast agents that enable molecular imaging of tumors using CT.
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Affiliation(s)
- Hanmant
K. Gaikwad
- The
Institute for Drug Research, The School of Pharmacy, The Faculty of
Medicine, The Hebrew University, Jerusalem 9112001, Israel
| | - Darya Tsvirkun
- The
Institute for Drug Research, The School of Pharmacy, The Faculty of
Medicine, The Hebrew University, Jerusalem 9112001, Israel
| | - Yael Ben-Nun
- The
Institute for Drug Research, The School of Pharmacy, The Faculty of
Medicine, The Hebrew University, Jerusalem 9112001, Israel
| | - Emmanuelle Merquiol
- The
Institute for Drug Research, The School of Pharmacy, The Faculty of
Medicine, The Hebrew University, Jerusalem 9112001, Israel
| | - Rachela Popovtzer
- Faculty
of Engineering and The Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Galia Blum
- The
Institute for Drug Research, The School of Pharmacy, The Faculty of
Medicine, The Hebrew University, Jerusalem 9112001, Israel
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Abstract
Cardiac computed tomography (CT) imaging has become an important part of modern cardiovascular care. Coronary CT angiography (CTA) is the first choice imaging modality for non-invasive visualization of coronary artery stenosis. In addition, cardiac CT does not only provide anatomical evaluation, but also functional and valvular assessment, and myocardial perfusion evaluation. In this article we outline the factors which influence contrast enhancement, give an overview of current contrast injection and acquisition protocols, with focus on current emerging topics such as pre-transcatheter aortic valve replacement (TAVR) planning, cardiac CT for congenital heart disease (CHD) patients, and myocardial CT perfusion (CTP). Further, we point out areas where we see potential for future improvements in cardiac CT imaging based on a closer interaction between CT scanner settings and contrast injection protocols to tailor injections to patient- and exam-specific factors.
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Affiliation(s)
- Jan-Erik Scholtz
- Cardiac MR PET CT Program, Department of Radiology (Cardiovascular Imaging) and Division of Cardiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Brian Ghoshhajra
- Cardiac MR PET CT Program, Department of Radiology (Cardiovascular Imaging) and Division of Cardiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
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Glick SJ, Makeev A. Investigation of x-ray spectra for iodinated contrast-enhanced dedicated breast CT. J Med Imaging (Bellingham) 2017; 4:013504. [PMID: 28149923 DOI: 10.1117/1.jmi.4.1.013504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 01/04/2017] [Indexed: 12/27/2022] Open
Abstract
Screening for breast cancer with mammography has been very successful, resulting in part to a reduction of breast cancer mortality by approximately 39% since 1990. However, mammography still has limitations in performance, especially for women with dense breast tissue. Iodinated contrast-enhanced, dedicated breast CT (BCT) has been proposed to improve lesion analysis and the accuracy of diagnostic workup for patients suspected of having breast cancer. A mathematical analysis to explore the use of various x-ray filters for iodinated contrast-enhanced BCT is presented. To assess task-based performance, the ideal linear observer signal-to-noise ratio (SNR) is used as a figure-of-merit under the assumptions of a linear, shift-invariant imaging system. To estimate signal and noise propagation through the BCT detector, a parallel-cascade model was used. The lesion model was embedded into a structured background and included a realistic level of iodine uptake. SNR was computed for 84,000 different exposure settings by varying the kV setting, x-ray filter materials and thickness, breast size, and composition and radiation dose. It is shown that some x-ray filter material/thickness combinations can provide up to 75% improvement in the linear ideal observer SNR over a conventionally used x-ray filter for BCT. This improvement in SNR can be traded off for substantial reductions in mean glandular dose.
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Affiliation(s)
- Stephen J Glick
- US Food and Drug Administration , Center for Devices and Radiological Health, Silver Spring, Maryland, United States
| | - Andrey Makeev
- US Food and Drug Administration , Center for Devices and Radiological Health, Silver Spring, Maryland, United States
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Abstract
RATIONALE Hysterosalpingography (HSG), a standard procedure for the evaluation of women with infertility and repetitive pregnancy loss, is associated with complications such as uterine perforation, infection, allergic reactions, syncope, hemorrhage and shock, and pulmonary or retinal embolus. However, hyperthyroidism has not been reported as one of its complications. PATIENT CONCERNS AND DIAGNOSES We report the case of a 33-year-old euthyroid woman who presented to our hospital with palpitation, hand tremor, fatigue, and excessive sweating after HSG. Thyroid function tests revealed a thyroid stimulating hormone (TSH) level of 0.012 μIU/mL (range 0.38-4.34 μIU/mL), free T4 of 2.886 ng/dL (range 0.81-1.89 ng/dL), and free T3 levels of 9.4 pg/mL (range 1.80-4.10 pg/mL), and antithyroglobulin antibody of 31.78 IU/mL (range <115 IU/mL). The triiodothyronine uptake was 3.057 ng/mL (range 0.66-1.92 ng/mL). Serum iodine (SI) and urinary iodine (UI) levels: SI of 4717.748 μg/L (range 45-90 μg/L) and UI of 18069.336 μg/L (range 26-705 μg/L). INTERVENTIONS AND OUTCOMES The patient was diagnosed with iodine-induced hyperthyroidism (IIH), but was not treated with antithyroid drugs. She has spontaneously recovered and is pregnant currently. LESSONS This is the first reported case of overt IIH caused by HSG in a euthyroid patient without risk factors. It suggests that HSG also leads to excessive iodine absorption, which induces secondary hyperthyroidism.
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Affiliation(s)
- Guotao Ma
- Department of Cardiac Surgery, Peking Union Medical College Hospital, Beijing, China
| | - Rui Mao
- Department of Plastic Surgery, Plastic Surgery Hospital (Institute), Chinese Academy of Medical Science & Peking Union Medical College (CAMS & PUMC), Beijing, China
| | - Haixin Zhai
- Department of Cardiac Surgery, Peking Union Medical College Hospital, Beijing, China
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Singhana B, Chen A, Slattery P, Yazdi I, Qiao Y, Tasciotti E, Wallace M, Huang S, Eggers M, Melancon MP. Infusion of iodine-based contrast agents into poly(p-dioxanone) as a radiopaque resorbable IVC filter. J Mater Sci Mater Med 2015; 26:124. [PMID: 25690619 PMCID: PMC6154385 DOI: 10.1007/s10856-015-5460-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 01/09/2015] [Indexed: 05/21/2023]
Abstract
To determine the feasibility of infusing resorbable inferior vena cava (IVC) filter with iodine-based contrast agents to produce a radiopaque, computed tomography (CT)-visible IVC filter. Infused poly(p-dioxanone) (PPDO) was obtained by incubating PPDO in different concentrations of 4-iodobenzoyl chloride (IBC) and 2,3,5-triiodobenzoic acid (TIBA). Characterizations of infused and nascent PPDO were done using elemental analysis, micro-CT, tensile strength analysis, scanning electron microscopy, and differential scanning calorimetry. Elemental analysis showed percentage loading of 1.07 ± 0.08 for IBC and 0.73 ± 0.01 for TIBA. The iodine loading remained the same within 2 weeks for TIBA but decreased to about 80 % with IBC when subjected to physiological conditions. Micro-CT images showed increased attenuation of the infused PPDO compared with the nascent PPDO. The Hounsfield unit values for infused and nascent sutures were 110 ± 40 and 153 ± 53 for PPDO infused with 2 mg/mL IBC and TIBA, respectively, but only 11.35 ± 2 for nascent PPDO. In contrast the HU for bone was 116 ± 37. Tensile strength analysis showed maximum loads of 1.01 ± 0.43 kg and 10.02 ± 0.54 kg for IBC and TIBA, respectively, and 10.10 ± 0.64 kg for nascent PPDO. Scanning electron microscopy showed that the morphology of the PPDO surface did not change after coating and preliminary cytotoxicity assay showed no killing effect on Hela cells. PPDO infused with a contrast agent is significantly more radiopaque than nascent PPDO on micro-CT imaging. This radiopacity could allow the position and integrity of infused resorbable IVC filter to be monitored while it is in place, thus increasing its safety and efficacy as a medical device.
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Affiliation(s)
- Burapol Singhana
- Department of Interventional Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- The Faculty of Liberal Arts and Sciences, Nakhon Phanom University, Nakhon Phanom, Thailand
| | - Aaron Chen
- The University of Texas Medical School at Houston, Houston, TX, USA
| | - Patrick Slattery
- College of Medicine, Northeast Ohio Medical University, Rootstown, OH, USA
| | - Iman Yazdi
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Yang Qiao
- Department of Interventional Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ennio Tasciotti
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX, USA
| | - Michael Wallace
- Department of Interventional Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Steven Huang
- Department of Interventional Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | | | - Marites P. Melancon
- Department of Interventional Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX, USA
- Correspondence to: Marites P. Melancon, PhD, , Telephone number: 713-794-5387
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