The Koning CT, a Cone Beam CT, provides high spatial and true isotropic resolution at lower dose levels than current CT units. The Koning CT for Breast was introduced at RSNA 2006 and is not cleared for sale in the USA.

A mammogram is a low dose x-ray of the breast used to detect and diagnose breast disease, or to provide a baseline reference for later comparison. Multiple images are obtained by different positioning of the breast. The breast compression during mammography is an essential component to produce an optimal diagnostic mammogram. Film mammography units use film to both capture and display the image; digital mammography units use electronic equipment.
A spot compression reduces the thickness of the area of interest and improves contrast and separation of breast tissues.

Noise is an undesirable background interference or disturbance that affects image quality. The image noise is commonly characterized by the standard deviation of CT numbers in the image of a uniform object (phantom - generally water) relative to the difference in CT numbers between water and air.
Noise is an important limiting factor of CT image quality and is characterized by a grainy appearance, sometimes described as a salt and pepper pattern. Noise as a result of low radiation dose requires a higher tube current (mA) in combination with narrow slices to maintain image noise at an acceptable level.

Omnipaque (iohexol) is a nonionic, low-osmolar contrast agent and is also available for oral use, offering gastrointestinal (GI) visualization with minimal side effects. Omnipaque has a neutral taste that even kids will drink.
Orally administered iohexol is poorly absorbed from the normal gastrointestinal tract. Omnipaque is well tolerated and absorbed if leakage into the peritoneal cavity occurs.
The recommended dosage of undiluted Omnipaque (at a concentration of for example 350 mg/mL) for computed tomography of the abdomen in adults is 500 mL to 1000 mL, diluted to concentrations of 6 mg/mL to 9 mg/mL. The oral dose should be administered about 20 to 40 minutes prior to the CT scan.

Oxilan® is a radiographic contrast agent used in diagnostic imaging studies. The degree of contrast enhancement is directly related to the iodine content in the administered dose. Dependent on the iodine content, the osmolalities are 2.1 or 2.4 times that of plasma (285 mOsm/kg water).