Which of the following investigation work on the same principle?: (A) CT and MRI, (B) CT and X-ray, (C) USG and HIDA Scan, (D) MRI and PET Scan
Answer is B. Principle of: CT :Linear attenuation ofXrays Xray:Xrays (Fluoroscopy also works on the principal of Xrays) MRI: Gyromagnetic propey of H+ USG: Pulse-Echo Principle with Piezoelectric effect PET scan: Annihilation and coincidence imagine, gamma rays -511 key HIDA Scan: Radioisotope scintigraphy, gamma rays.