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 edited by countless contributing members over a period of time. A global group of dedicated editors oversee accuracy, consulting with expert advisers, and constantly reviewing additions.
3 results found
Article
Acanthosis nigricans
Acanthosis nigricans is a cutaneous disorder characterized by symmetric hyperpigmented velvety plaques on the neck, axillae, antecubital and popliteal fossae, inframammary, and groin areas. It is associated with acquired lipodystrophy.
Pathology
The benign form of acanthosis nigricans is assoc...
Article
Hebbian learning
Hebbian learning describes a type of activity-dependent modification of the strength of synaptic transmission at pre-existing synapses which plays a central role in the capacity of the brain to convert transient experiences into memory. According to Hebb et al 1, two cells or systems of cells th...
Article
Early arterial phase
The early arterial phase, also known as the early systemic arterial phase, is a contrast-enhanced CT or MRI series, in which the contrast (e.g. iodinated or gadolinium) is still in the arteries and has not reached the organs and other soft tissues.
Technique
The acquisition time depends on the...
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