Radiology, also known as diagnostic imaging, is a series of tests that take pictures of images of parts of the body. The field encompasses two areas - diagnostic radiology and interventional radiology.
A variety of imaging techniques such as Radiography, Ultrasonography, Computed Tomography (CT), Nuclear Medicine including Positron Emission Tomography (PET), Fluoroscopy, and Magnetic Resonance Imaging (MRI) are used to diagnose or treat diseases. Interventional radiology is the performance of usually minimally invasive medical procedures.
3D scans show still pictures of your baby in three dimensions. 4D scans show moving 3D images of your baby, with time being the fourth dimension.It's natural to be really excited by the prospect of your first scan. But some mums find the standard 2D scans disappointing when all they see is a grey, blurry outline. This is because the scan sees right through your baby, so the photos show her internal organs. With 3D and 4D scans, you see your baby's skin rather than her insides. You may see the shape of your baby's mouth and nose, or be able to spot her yawning or sticking her tongue out.
3D and 4D scans may nonetheless provide more information about a known abnormality. Because these scans can show more detail. 3D scanning can also be useful to look at the heart and other internal organs. The images generated by 4D Ultrasounds are at par with CT scan images in clarity and detail without any radiation!