Medical imaging at the hospital is carried out under strict safety protocols, with X‑ray and CT using radiation doses that are tightly controlled and kept within the safe limits approved by health authorities, while ultrasound and MRI do not use ionising radiation at all.

Preparation depends on the type of test. Some scans may require fasting, drinking water, or avoiding certain medications. You will receive clear instructions in advance from the hospital or your doctor.

X‑ray and CT both use X‑rays (ionising radiation) to create images; X‑ray gives quick 2D views, mainly of bones and lungs, while CT combines many X‑ray images to produce detailed cross‑sectional views of internal structures. Ultrasound uses high‑frequency sound waves instead of radiation to show real‑time images of organs, vessels and pregnancy. MRI uses a strong magnetic field and radio waves, with no radiation, to generate highly detailed images of the brain, spine, joints and soft tissues.

Most X‑rays and ultrasounds take only a few minutes, while CT scans usually take under 30 minutes. MRI examinations can take longer, typically 20–45 minutes depending on the body part being scanned.

Most imaging tests are painless. You may need to lie still on a table or hold your breath briefly. Some exams use contrast agents injected into a vein or taken by mouth, which may cause a temporary warm feeling or unusual taste.

Ultrasound and MRI (in most cases) are considered safe during pregnancy. X‑ray and CT are used only when clearly necessary and with special precautions. Always inform your doctor and the imaging staff if you are or might be pregnant.

Contrast agents help highlight blood vessels, organs or abnormal areas so they can be seen more clearly. Your doctor and radiology team will check your medical history and kidney function before using contrast.