Transdermal patches are intended to release a drug over an extended period of time.Particular care must be used with this type of drug administration owing to its design and thin metal backing.The modality of concern in medical imaging would be

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MRI scanning uses strong magnetic fields and radio waves to create images of the body. Transdermal patches often contain a thin metal backing, which can cause artifacts (unnatural features) in the MRI image. Therefore, particular care must be taken in performing an MRI on a patient who is wearing a transdermal patch. CT scanning and PET scanning also use ionizing radiation, which could potentially affect the drug in the patch, but these modalities do not have the same magnetic field as MRI, which makes MRI the main modality of concern in this case. Sonography does not involve radiation or magnetic fields and is not a concern with transdermal patches.

Transdermal Patches Are Intended to Release a Drug Over an Extended