| Air Polymer Type-A | Iopromide | |
| Aminohippurate Sodium | Iothalamate | |
| Ammonia N13 | Ioversol | |
| Arginine | Ioxaglate Meglumine + Ioxaglate Sodium | |
| Bemotrizinol | Ioxilan | |
| Choline C 11 | Ioxitalamic Acid | |
| Coccidioides immitis antigen | Ipodate | |
| Copper Cu 64 Dotatate | Isosulfan Blue | |
| Diatrizoate + Iodipamide | Lutetium Lu 177 dotatate | |
| Ethiodized Oil | Macimorelin | |
| Ferumoxides | Mangafodipir | |
| Ferumoxsil | Mannitol (Oral Inhalation) | |
| Florbetaben F18 | Meglumine Diatrizoate | |
| Florbetapir F18 | Metrizamide | |
| Flortaucipir F18 | Metyrapone | |
| Fluciclovine F18 | Mumps Skin Test Antigen | |
| Fludeoxyglucose F18 | Palladium (pd) 103 | |
| Fluorodopa F18 | Perflubron | |
| Fluoroestradiol F18 | Perflutren Lipid Microspheres | |
| Flutemetamol F18 | Phosphocol P 32 | |
| Ga 68 DOTATOC | Piflufolastat F-18 | |
| Gadobenate Dimeglumine | Potassium Perchlorate | |
| Gadobutrol | Protirelin | |
| Gadodiamide | Radium-223 Dichloride | |
| Gadofosveset | Regadenoson | |
| Gadopentetate Dimeglumine | Rose Bengal | |
| Gadopentetic Acid | Samarium Sm 153 Lexidronam Pentasodium | |
| Gadoterate Meglumine | Secretin | |
| Gadoteridol | Sincalide | |
| Gadoversetamide | Sodium Phosphate P 32 | |
| Gadoxetate Disodium | Strontium Chloride Sr 89 | |
| Gallium Ga 68 PSMA-11 | Sulfur Hexafluoride | |
| Hexaminolevulinate | Technetium | |
| Icodextrin | Technetium TC 99m Pyrophosphate | |
| Indium (In 111) Capromab Pendetide | Technetium Tc 99m Besilesomab | |
| Indium (111) Chloride | Technetium Tc 99m Depreotide | |
| Indium (111) Imciromab Pentetate | Technetium Tc 99m Exametazime | |
| Indium (111) Oxyquinoline | Technetium Tc 99m Fanolesomab | |
| Indium (111) Pentetreotide | Technetium Tc 99m Medronate | |
| Indium (111) Satumomab Pendetide | Technetium Tc 99m Nofetumomab Merpentan | |
| Iobenguane | Technetium Tc 99m Pentetate | |
| Iobenguane Sulfate I 131 | Technetium Tc 99m Sestamibi | |
| Iobitridol | Technetium Tc 99m Sodium Pertechnetate | |
| Iocetamic Acid | Technetium Tc 99m Sulfur Colloid | |
| Iodamide | Thallous Chloride TI-201 | |
| Iodine I-125 Iotalamate | Tolonium Chloride | |
| Iodipamide | Tositumomab | |
| Iodixanol | Tricarbocyanine | |
| Ioflupane I 123 | Trypan Blue | |
| Iohexol | Tuberculin Purified Protein Derivative (PPD) | |
| Iopamidol | Tyropanoate Sodium | |
| Iopanoic Acid | Verteporfin |
