Articles
Articles are a collaborative effort to provide a single canonical page on all topics relevant to the practice of radiology. As such, articles are written and continuously improved upon by countless contributing members. Our dedicated editors oversee each edit for accuracy and style. Find out more about articles.
9 results found
Article
Mean glandular dose
The mean glandular dose (MGD) is an estimate of the average absorbed dose to the glandular tissues of a breast during mammography. It is measured in Gray (Gy).
The most commonly accepted method of calculating the mean glandular dose is described by Dance et al (2000):
...
Article
Mammography
Mammography is a dedicated radiographic technique for imaging the breast, and the resultant images are known as mammograms.
Types of mammography
In general terms, there are two types of mammography: screening and diagnostic.
Mammography differs significantly in many respects from the rest of ...
Article
Fat suppressed imaging
Fat suppression is commonly used in magnetic resonance imaging (MRI) imaging to suppress the signal from adipose tissue or detect adipose tissue 1. It can be applied to both T1 and T2 weighted sequences.
Due to short relaxation times, fat has a high signal on MRI. This high, easily recognized ...
Article
Contrast-enhanced mammography
There are 2 types of contrast-enhanced mammography examination – temporal subtraction and dual-energy.
Initial work in the early 2000s used temporal subtraction, but artifacts due to patient movement during prolonged compression limited its diagnostic usefulness. Travieso et al produced a usef...
Article
Ultrasound elastography
Ultrasound elastography, also called as sono-elastography, is a modern evolutionary method of sonographic imaging. Techniques include shear wave elastography (also known as transient elastography) and strain elastography (also known as static or compression elastography). These techniques utiliz...
Article
Automated full-field volumetric ultrasound
An automatic full-field volumetric breast ultrasound scanner (AFFBUS) is a developing technology which was initiated to overcome the drawback of dense breast and to get a three-dimensional view of the breast.
Components
scan station
view station
Scan station
Automatic ultrasound ima...
Article
Step-and-shoot tomosynthesis (breast)
Step-and-shoot is a technology of image acquisition in digital breast tomosynthesis characterized by stop scanning at every single angle during images acquisition.
Step-and-shoot technology allows advantages in microcalcifications conspicuity, spatial resolution, signal-to-noise Ratio improveme...
Article
Lymphoscintigraphy
Lymphoscintigraphy is a nuclear medicine technique to visualize regional lymphatic drainage, especially for mapping sentinel lymph nodes, from a site of radiopharmaceutical injection.
Radiopharmaceutical
Colloidal agents are used as these particles enter lymphatic channels and migrate to lymph...
Article
Flying focus tomosynthesis
Flying focus is a technology of image acquisition in digital breast tomosynthesis characterized by a continuous sweep during shooting.
Sharpness in digital systems is determined by the modulation transfer function (MTF), which determine contrast transfer as a function of spatial frequency.
Sin...
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