The cine mode is a series of rapidly recorded multiple images taken at sequential cycles of time and displayed on a monitor in a dynamic movie display format.

The (spot) compression of for example breast tissue, allows for greater reduction in thickness of the area of interest and improved separation of breast tissues by the use of a small compression device.
Compression can be also a software or hardware process that shrinks images to lessen the storage space. Compression is generally accomplished by removing the bits that define redundant like data blank spaces, and replacing them with a smaller symbolic code that represents the removed or redundant bits.

Convolution is an important mathematical technique in digital signal processing. Raw data undergo spatial filtration prior to back projection by combining two signals to form a third signal. Convolution is related to the input signal, the output signal, and the impulse response. This operation is mostly used together with Fourier transformations for CT signal and image processing.

A convolution filter is a mathematical filter function (also called kernel). During image reconstruction of computed tomography scans, various types of convolution filters e.g., to smooth or to enhance edges, can be selected according to the tissue characteristics.

See also Raw Data.

(CCTA) Coronary computed tomography angiography is a diagnostic imaging procedure to visualize the coronary arteries. CCTA is a non-invasive angiogram that allows the assessment of narrowed and clogged arteries that can cause heart attack and stroke.
Coronary CTA is a non-invasive alternative to traditional angiography that offers detailed images of heart function, resulting in faster, more accurate diagnosis. It helps stratify cardiac risk in patients with low to intermediate likelihood of coronary artery disease. For some patients with chest pain, coronary CTA can rule out the need for cardiac catheterization.
Coronary imaging requires a very fast CT scan, because the coronary arteries and other cardiac structures move rapidly during the cardiac cycle. The current 'state of the art' 64 slice multi-detector row CT systems rotate around the patient in less than 500 ms. The data must be acquired monitored by an electrocardiogram, which allows the computer to reconstruct retrospectively slices at different small segments of the cardiac cycle. This cardiac synchronization reduces motion artifacts in the coronary arteries and provides movies of the beating heart and valve motion.
See also Coronary Angiogram, Calcium Score, Cardiac Phase, Cine Mode and Defibrillator.