Introduction
Imaging in pregnancy prioritizes fetal safety while addressing maternal diagnostic needs and may use ultrasound MRI and when necessary low dose CT with shielding. Ultrasound is the first line for obstetric and many non obstetric indications and MRI is used when additional anatomic detail is required without ionizing radiation. CT is reserved for urgent situations where benefits outweigh risks.
Obstetric Ultrasound
Standard obstetric ultrasound assesses fetal growth anatomy and placental position and is safe across gestation. Doppler studies evaluate fetal wellbeing and placental perfusion when indicated. Sonographer expertise and standardized protocols ensure diagnostic quality.
MRI in Pregnancy
MRI provides detailed evaluation of maternal and fetal anatomy and is useful for complex fetal anomalies and maternal conditions such as appendicitis or adnexal masses. Gadolinium is generally avoided unless essential and used with caution after risk benefit assessment. MRI protocols minimize acoustic noise and thermal load while optimizing diagnostic sequences.
CT Use and Safety
CT may be necessary for acute maternal conditions such as pulmonary embolism or trauma and should use dose reduction techniques and shielding when feasible. Clear documentation of indication and informed consent support decision making. Multidisciplinary discussion with obstetrics radiology and maternal fetal medicine optimizes care.