A C-scan ultrasound can be displayed in 2D or 3D ultrasound technique. C-scan systems can generate images which are parallel to the surface of the skin (coronal). 2D plane images, usually in gray scale, are recordable at different depths, maintaining high quality subsurface information.

Cardiac ultrasound, also known as echocardiography or echocardiogram, is used to provide several different levels and types of heart testing. Cardiac ultrasound utilizes the same ultrasound principles as used for obstetric and gynecologic evaluations of pregnant women, gallbladder ultrasound and other abdominal structures.
The ultrasound is directed out of a hand held probe which can be moved to image the heart from different positions. Additionally, so that heart events can be timed, ECG leads are placed on the chest. The reflected wave is converted into an actual image of the heart and displayed in a real-time mode or M-mode ultrasound format. M-mode recordings permit measurement of cardiac dimensions and detailed analysis of complex motion patterns depending on transducer angulations. Also the time relationships with other physiological variables such as ECG, heart sounds, and pulse tracings, can be recorded simultaneously. A stress echocardiogram provides information about the cardiac performance.
Two-dimensional tomographic images of selected cardiac sections give more information than M-mode about the shape of the heart and also show the spatial relationships of its structures during the cardiac cycle (diastole to systole).

See also M-Mode Echocardiography, and Myocardial Contrast Echocardiography.

(CPU) The CPU is the brain of the ultrasound machine, the main processor in the computer.
The CPU executes complex computer programs to send electrical currents to the transducer probe to emit sound waves, to receive the electrical pulses from the probes that were created from the returning echoes. The CPU does the calculations, data processing and forms the image on the display. The CPU also stores the processed data and/or image on disk.disk.

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A cineloop is a period of images, stored digitally as a sequence of individual frames. Cineloops recorded at high frame rates may contain more frames than were displayed during the examination.