Used One Set and Threw Another

Zheng Ren held the radiographic films and talked for more than twenty minutes. He felt that something was missing, so he asked, "Is there a fresh liver?"

"From a white mouse?" Dr. Smith asked.

"It'd better be bigger," Zheng Ren said after a moment of silence.

"No matter what animal's liver is, it needs to be fresh. Then, take it to the MRI room to do an MRI diffusion," Su Yun said.

Zheng Ren: "..."

What the hell was this? Taking the animal's liver tissue to the nuclear magnetic resonance imaging room for examination? Was the nuclear magnetic resonance imaging (nuclear MRI) not supposed to be performed on patients?