I/V contrast is not used in –: (A) HRCT, (B) MRI, (C) IVP, (D) Myelography
Answer is D. IV contrast agent is given in :-


X-ray based investigation (Radiocontrast agent) :- Radiography (simple x-ray), CT-Scan.
MRI (MR contrast agents).
Ultrasound (USG contrast agents).


IVP (intravenous pyelography) as the name suggests, the contrast agent is given intravenously.
In myelography, the contrast agent is injected into subarachnoid space.