The title of this novel is Ark Angle, the author is Anthony Horwitz. The genre is fantasy, there are 324 pages, and the Lexile is 680.
You get to come home in a few days
Then later that night when he couldn't sleep he got out of his room and when down to the lobby to ask the night receptionist Conor if he could go outside into the fresh air, but that is when the doors opened and 4 men walked into the building, they then asked if they could see if a patient and Conor said no because it was 1:00 in the morning.
but the men wanted to see the patient, finally, Conor gave in and gave the men the room number than one of the men shot and killed Conor.
So Alex "lead him into the MRI room where Alex had turned the machine on and when the guy walked in the gun was pulled away by the magnetic field of the MRI machine and then he was sucked to the machine because of all the metal he had on him he was lifted and pulled toward the machine.
Alex forget there is still one man outside an as he dials 911 he is hit in the back of the head by the driver of the car.
You will stay here until we come back to get you
And don't try to esacpe
He then escapes from the people and the tower and then is sent back to the hospital.