With more electronics in our lives, there are multiple chances of you putting kinds of implants/ Microchips devices in your body. Also some accidents or injuries  make foreign bodies enter our body and stay in there for several months or even years. There are several other reasons for unidentified body to enter, so are the challenges in getting rid of them. You need to tell your Surgeon where exactly is the location of the suspected body. Then you turn towards radiology to get an answer wherein the MRI/CT scanning technique needs to use a proper marker .

From a medical perspective, foreign bodies could be removed only if there is a reactive inflammatory process. If so radiologist can see inflammatory processes clearly and job is easy. But what if you dont have an inflation but feeling pain or unusual sensation suspected due to implant or injury. You initiate MRI/CT scanning then. Pre-scan stage, MRI marker becomes important.

Usually the procedure is>> a Marker is placed on the surface during MRI / CT scanning at the site of Maximum pain / tenderness / area of interest. There are different types of Markers available in market. Most commonly used in MRI are Vitamin D capsules, which are cheap and easily available.So that Radiologist knows where to focus for abnormality.

During second opinion process, it is very important to get answer from patients if any such marker was placed during scan or not.

Moreover things might be complex, if one doe not know the nature of foreign body, where and how deep it was implanted initially? For some reasons, sometimes such bodies get absorbed in the body , some micro-devices are occult on MRI imaging. That means not seen in MRI clearly. So unless, referring doctor or patient provides detailed history of the implant, it is nearly impossible for Radiologist to think/ locate / provide information about the implant. It is like a person had hidden a thing in your house. Now it is your job to find out. Unless that person provides more and accurate information on something, you ill not able to find it identify it. If that person provides some vague info like that thing is a Toy. This will narrow down your search but still difficult to search.

You will need precise information about something like Teddy bear toy which is white in color and 5 cm height, etc ect,

Please find below the marker (Tab Vita D) used on the surface of Knee of a patient  during MRI scanning - where there was pain and tenderness. How it looks into MRI scan, please see below picture..