Abstract
To noninvasively diagnose disease and to describe response to therapy regarding morphology (e.g., size, structure) and (patho)physiology (e.g., blood perfusion) as well as cell function optimal image contrast is key. In our various body compartments in vivo contrast can be altered and improved by changing its intensity and distribution over time. This imaging fortune has been established by various contrast agents typically administered intravenously. Imaging methods in the field of ultrasound, magnetic resonance imaging, as well as computed tomography are continuously being improved by safe, valid, and efficient contrast agents. New targeted and specific agents are in the pipeline, but there are still a few more steps to go to reach market approval.
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Appendices
Appendix 15.1: Overview of Available Nonionic, Low-osmolar, and Iso-osmolar Contrast Media and Their Physicochemical Properties
Generic name (mg I/mL) | Trade name(s) | Manufacturer | Labeled indicationsa | Type, ionicity | Osmolality (mOsm/kg H2O)b, c | Viscosity at 37 °C (mPa × s) | Molecular weight (Da) |
---|---|---|---|---|---|---|---|
Iohexol (300/350) | Omnipaque | GE Healthcare | Myelography, cisternography, ventriculography (intrathecally), head, body, GI tract | LOCM nonionic (monomer) | 672/844 | 6.3/10.4 | 821 |
Omnitrast | Bayer HealthCare Juste | ||||||
Omnigraf | |||||||
Iopentol (300) | Imagopaque | GE Healthcare | Whole body, angiography, GI tract | LOCM nonionic (monomer) | 640/818 | 6.5/12.0 | 835 |
Iopamidol (300/370) | Isovue | Bracco | Head, whole body | LOCM nonionic (monomer) | 616/796 | 4.7/9.4 | 777 |
Iopamiron | |||||||
Iopamiron | |||||||
Niopam | |||||||
Solutrast | |||||||
Iopromide (300/370) | Ultravist | Bayer HealthCare | Whole body | LOCM nonionic (monomer) | 607/774 | 4.9/10.0 | 791 |
CT and angiography | |||||||
Ioversol (300/350) | Optiray | Covidien | Head, body | LOCM nonionic (monomer) | 651/792 | 5.5/9.0 | 807 |
Iobitridol (300/350) | Xenetix | Guerbet | Head, whole body | LOCM nonionic (monomer) | 695/915 | 6.0/10.0 | 835 |
Ioxilan (300/350) | Oxilan | Guerbet | Head, body | LOCM nonionic (monomer) | 585/695 | 5.1/8.1 | 791 |
Iomeprol (300/400) | Imeron | Bracco | Brain, body, cavernosography, myelography, urography | LOCM nonionic (monomer) | 521/726 | 4.5/12.6 | 777 |
Iodixanol (320) | Visipaque | GE Healthcare | Head, body | IOCM nonionic (dimer) | 290 | 11.8 | 1,550 |
Appendix 15.2: Physicochemical Properties of Tissue-specific and Nonspecific MR Contrast Agents
Lab name | Ionicity | Chemical structure | log K | log K′ | Osmolality osmol/kg H2O (37 °C) | Viscosity (mPa s) (37 °C) | WS r1 | HP r1 | HP r2 | HP 3.0T13y r1/r2 |
---|---|---|---|---|---|---|---|---|---|---|
[Gd-DTPA]2− | 2− | Linear | 22.14 | 17.74 | 1.962 | 2.92 | 3.83q | 4.93z | 6.33z | 3.7/5.2 |
Gd-BT-DO3A | Neutral | Macrocyclic | 21.81 | 17.11 | 1.602 | 5.02 | 3.62r | 5.68z | 6.58z | n.a. |
Gd-HP-DO3A | Neutral | Macrocyclic | 23.84 | 16.92 | 0.634 | 1.44 | 3.77q | 4.67c | 5.37c | 3.7/5.7 |
[Gd-BOPTA]2− | 2− | Linear | 22.63 | 18.42 | 1.972 | 5.32 | 4.42 | 9.72z | 12.52z | 5.2/11.0 |
[Gd-DOTA]1− | 1− | Macrocyclic | 25.45 | 18.25 | 1.3510 | 2.010 | 3.57q | 4.37c | 5.07c | 3.5/4.9 |
Gd-DTPA-BMA | Neutral | Linear | 16.94 | 14.94 | 0.654 | 1.44 | 3.97r | 4.67c | 5.17c | 4.0/5.6 |
Gd-DTPA-BMEA | Neutral | Linear | 16.86 | 15.0 | 1.106 | 2.06 | 4.6 | 3.8c | n.a. | n.a. |
Gd-EOB-DTPA | 2− | Linear | 23.59 | 18.711 | 0.8811 | 1.211 | 5.511m | 8.6 | n.a. | 6.2/4.0 |
[Mn-DPDP]2− | 2− | Linear | n.a. | n.a. | 0.302 | 0.82 | n.a. | 2.312 | 4.012 | n.a. |
[Gadophostriamine trisodium]3− | 3− | Linear | 22.411 | 18.911 | 0.8311 | 1.811 | 6.611 | 47.213 | 57.613 | 9.9/73 |
SHU555A | Neutral | Coated with carboxydextran | – | – | 0.3211 | 1.0311 | 23.613 | 1513 | 10113 | 3.3/160 |
AMI-25 | Negat. charged | Coated with dextran | – | – | 0.3410 | 1.310 (20 °C) | 20.213 | 2414 | 10714 | 2.7/45 |
AMI-227 | Negat. charged | Coated with dextran | – | – | 0.3610 | 1.310 (25 °C) | 2810 | 23.014 | 51.014 | n.a. |
[P792]1− | 1− | Macrocyclic | – | – | 0.3010 | 7.210 | 4210 | 4810 | n.a. | n.a. |
Gadomer-17 | Neutral | Polyamide | – | – | 0.3811 | 7.011 | 17.311 | 18.711 | 2311 | 13/25 |
Appendix 15.3: Overview of Approved and Selected Experimental MR Contrast Media with Approval Status, Distribution, and Physicochemical Properties
Agent name | Lab name | Trade name | Company | Body part (Country) | MW (g/mol) | C (molar) | T ½ in blood (min) | Distribution |
---|---|---|---|---|---|---|---|---|
Gadopentetate dimeglumine | Gd-DTPA | Magnevist | Bayer HealthCare | CNS, WB (EU, USA, Japan) | 938 | 0.5 | ~90 | Extracellular |
Gadobutrol | Gd-BT-DO3A | Gadovist | Bayer HealthCare | CNS (EU, USA) | 605 | 1.0 | ~90 | Extracellular |
Gadoteridol | Gd-HP-DO3A | ProHance | Bracco | CNS, WB (EU, USA, Japan) | 559 | 0.5 | ~90 | Extracellular |
Gadobenate dimeglumine | Gd-BOPTA | MultiHance | Bracco | CNS, liver (EU, USA) | 1058 | 0.5 | ~90 | Liver/extracellular |
Gadoterate meglumine | Gd-DOTA | Dotarem | Guerbet | CNS, WB (EU) | 558 | 0.5 | ~90 | Extracellular |
Gadodiamide | Gd-DTPA-BMA | Omniscan | GE Healthcare | CNS, WB (EU, USA, Japan) | 574 | 0.5 | ~90 | Extracellular |
Gadoversetamide | Gd-DTPA-BMEA | OptiMARK | Covidien | CNS, liver (EU, USA) | 662 | 0.5 | ~90 | Extracellular |
Gadoxetic acid disodium | Gd-EOB-DTPA | Primovist/Eovist | Bayer HealthCare | Liver (EU, USA) | 726 | 0.25 | ~90 | Liver/extracellular |
Gadofosveset | Diphenylcyclo-hexyl phospho-diester-Gd-DTPA | ABLAVAR | Lantheus Medical Imaging, Inc. | USA, EU (abd, limbs) | 957 | 0.25 | 224 ± 30 | Intravascular/extracellular |
SHU555 A | Ferucarbotran | Resovist/Cliavist | Bayer HealthCare | Discontinued | ~700,000 | 0.5 M Fe/l | 144–216/234–348 | Liver/RES |
AMI-25 | Ferumoxides | Feridex IV/Endorem | Berlex/Guerbet | Liver (Japan, EU, USA) | n.a. | 0.2 M Fe/l | 144 | Liver/RES |
AMI-227 | Ferumoxtran-10 | Combidex/Sinerem | Cytogen/Guerbet | Discontinued | n.a. | 0.36 M Fe/l | >1,000 | LN, RES |
Dendrimer | Gadomer-17 | n.a. | Bayer HealthCare | Phase II | 17,453 | 0.05 | 120–180 | Intravascular |
P792 | Gadomeritol | Vistarem | Guerbet | Phase II | 6,473 | 0.035 | ~120 | Intravascular |
Appendix 15.4: Overview of Available US Contrast Media with Current Approval and Distribution Status
Trade name(s) | Manufacturer | Labeled indicationsa | Shell composition | Gas | Availability |
---|---|---|---|---|---|
Albunex | Covidien | Cardiac | Albumin | Air | Discontinued since availability of Optison |
Optison | GE Healthcare | Cardiac | Albumin | Perfluoropropane | US, EU |
Echovist | Bayer HealthCare | Hysterosalpinx, cardiac | D-Galactose | Air | Discontinued since availability of Levovist |
Levovist | Bayer HealthCare | Cardiovascular, focal liver lesions | Galactose/palmitic acid | Air | EU, Canada, Japan, Chinaa |
Imagent | Targeson, Inc | Echocardiography | Surfactant | Perfluorohexane | China |
Definity/Luminity | Lantheus Medical Imaging | Cardiac; liver, kidney | Liposome | Octafluoropropane | EMEA= EU |
Definity = b | |||||
SonoVue | Bracco | CEUS | Surfactant/Phospholipid | Sulfur hexafluoride | EU |
Sonazoid | Daiichi Sankyo | Liver, spleen, myocardial perfusion | Lipid stabilized | Perfluorocarbon | Japan |
Br14 | Bracco | Microcirculation, cardiac | Phospholipid | Perfluorocarbon | Phase III |
Imagify | Acusphere | Cardiac | Poly-L-lactide co-glycide | Perflubutane | Phase III |
Sonavist/Sonovist | GE Healthcare | Uptake by Kupffer cells in RES | Polycyanoacrylate | Air | RND |
Echogen | Sonus | Heart | Surfactant | Dodecafluoropentane | European approval then withdrawn from market in 2000 |
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von Tengg-Kobligk, H., Mehndiratta, A., Giesel, F.L. (2014). Contrast Agents in Radiology. In: Miller, C., Krasnow, J., Schwartz, L. (eds) Medical Imaging in Clinical Trials. Springer, London. https://doi.org/10.1007/978-1-84882-710-3_15
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