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

Answer is Magnetic Resonance Imaging.

Explanation:

A transdermal patch is an adhesive patch which is used medically for delivering doses of medication via the skin into the bloodstream, by simply placing the patch on the skin.

Most of the medications that can be administered through the transdermal patch are pain relievers, nicotine, hormones and contraception to prevent pregnancy.

It has been discovered that, pregnancy patch is 99% effective and last for about 7 days.

Magnetic Resonance imaging, MRI, is used to produce the image of the body, with the use of magnetic and radio wave. It is helpful in diagnosing injury or disease and monitor how well a patient is responding to treatments.

It can be used to detect spinal tumor, cancer , fracture etc. and it is safe  and easy to use.

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.