A<unk>  of a human fetus aged 20 weeks<unk>  is a medical<unk>  technique, often used in fetal, cardiac, trans-rectal and intra-vascular applications.<unk>  refers specifically to the volume rendering of<unk>  data. When involving a series of<unk>  volumes collected over time, it can also be referred to as<unk>  (3-spatial dimensions plus 1-time dimension) or real-time<unk> . When generating a<unk>  volume, the<unk>  data can be collected in four common ways by a sonographer. Freehand, which involves tilting the probe and capturing a series of<unk>  images and recording the transducer orientation for each slice. Mechanically, where the internal linear probe tilt is handled by a motor inside the probe. Using an endoprobe, which generates the volume by inserting a probe and then removing the transducer in a controlled manner. The fourth technology is the matrix array transducer that uses beam steering to sample points throughout a pyramid shaped volume.
3D ultrasound
Synthetic MRI
4DCT
EConsult
Tomographic reconstruction
Nuchal scan
MRI Robot
Ultrasound transmission tomography