QUESTIONS 36–42 ARE BASED ON THE FOLLOWING PASSAGE.D.A COMPANY CONTROL...

37. The inability to generate satisfactory images ofimage of human lungs.air routes is a deficiency of(4) By 1995 researchers had produced the firsta.computed tomography.b.the spin exchange process.three-dimensional MRI pictures of a living animal’slungs. In the first human test, a member of thec. three-dimensional pictures.research team inhaled hyperpolarized helium-3. Hisd.X rays.lungs were then imaged using a standard MRI scan-ner that had been adjusted to detect helium. The