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.
16,919 results
Article
Invasive mucinous adenocarcinoma of the lung
Invasive mucinous adenocarcinoma (IMA) of the lung is a subtype of invasive adenocarcinoma of the lung formerly known as mucinous bronchoalveolar carcinoma (BAC). They are more likely to be multicentric and tend to have a worse prognosis than non-mucinous types.
Terminology
In 2011, the Inter...
Article
Meningeal hemangiopericytoma (historical)
Hemangiopericytomas of the meninges are rare tumors of the meninges, now considered to be an aggressive form of solitary fibrous tumors of the dura. They often present as large and locally aggressive dural masses, frequently extending through the skull vault. They are difficult to distinguish on...
Article
Parathyroid hyperplasia
Parathyroid hyperplasia is the diffuse enlargement of the parathyroid glands and is a less common cause of primary hyperparathyroidism.
Epidemiology
There is a female predilection (M:F = 1:3).
Clinical presentation
Most commonly an incidental finding of hypercalcemia in asymptomatic patien...
Article
Shoulder resurfacing arthroplasty
Shoulder resurfacing arthroplasty is a form of partial shoulder joint replacement for the management of pathologies concerning the humeral head.
History and etymology
The first shoulder arthroplasty was performed by Péan in 1893. The 3rd generation arthroplasties were introduced by Neer from t...
Article
Chronic myocarditis
Chronic myocarditis is a prolonged or ongoing myocardial inflammation in the setting of non-dilated or mildly dilated cardiomyopathy 1-5. There have been significant differences concerning the exact definition of the concept as well as the time interval after the onset of symptoms, with the latt...
Article
Unicompartmental knee arthroplasty
Unicompartmental knee arthroplasties (UKA) or replacements (UKR) are orthopedic procedures where either the medial or lateral articular surfaces of the knee are replaced by prostheses 1. This differs from patellofemoral arthroplasties, which replace the patellar and trochlear groove articular su...
Article
Iodine-131 iobenguane
Iodine-131 iobenguane, trade name Azedra, sometimes referred to as I-131 MIBG, is a theranostic (i.e. both therapeutic and diagnostic) agent used for the treatment of unresectable pheochromocytomas, paragangliomas, carcinoid, and neuroblastomas. It is created using the high specificity Ultratr...
Article
Chorda tympani
The chorda tympani is a nerve that arises from the mastoid segment of the facial nerve, carrying afferent special sensation from the anterior two-thirds of the tongue via the lingual nerve, as well as efferent parasympathetic secretomotor innervation to the submandibular and sublingual glands.
...
Article
Continuous X-ray spectrum
The continuous X-ray spectrum refers the range of photon energies produced in an X-ray tube due to the properties of Bremsstrahlung radiation.
The energy of X-ray photons can take a value from zero to the maximum kinetic energy of the incident electrons.
Both the continuous X-ray spectrum and ...
Article
Corticobasal degeneration
Corticobasal degeneration (CBD) is an uncommon neurodegenerative disease and is one of the subset of tauopathies.
Terminology
Corticobasal syndrome (CBS) represents the clinical syndrome that is diagnosed clinically, while corticobasal degeneration is only reserved for the subset of cases that...
Article
Multiple system atrophy cerebellar type (MSA-C)
Multiple system atrophy cerebellar type (MSA-C), previously known as olivopontocerebellar degeneration, is a neurodegenerative disease, and one of the clinical phenotypes of multiple systemic atrophy (MSA).
Terminology
The prevailing thought is that that olivopontocerebellar degeneration, Shy-...
Article
Penetrating traumatic neck injury
Penetrating traumatic neck injury can be a potentially devastating injury due to the high density of crucial anatomical structures within the neck.
Epidemiology
Young males are highly represented in patients with a traumatic neck injury. In one study, 11:1 ratio of males to females were ident...
Article
Anomalous left coronary artery from the pulmonary artery
Anomalous left coronary artery from the pulmonary artery (ALCAPA), also known as Bland-White-Garland syndrome (BWG), is a rare congenital coronary artery anomaly and is considered one of the most severe of such anomalies.
There are two forms, based on the onset of the disease, each of which has...
Article
Chronic pulmonary aspergillosis
Chronic pulmonary aspergillosis (CPA) is a group of chronic aspergillosis found in non-immunocompromised patients with prior or current lung disease (e.g. chronic obstructive pulmonary disease, mycobacteriosis or conditions such as diabetes).
It can manifest as several forms 1.
chronic cavitar...
Article
Seminars in Roentgenology
Seminars in Roentgenology is a general radiology review journal founded by Ben Felson, the renowned American radiologist. It was first published in 1966, and is published four times a year and is aimed at both the resident and practising radiologist. Its Editor is Prachi Agarwal. It is published...
Article
Multiple system atrophy parkinsonian type (MSA-P)
Multiple system atrophy parkinsonian type (MSA-P), previously known as striatonigral degeneration, is a neurodegenerative disease, and one of the phenotypes of multiple systemic atrophy (MSA).
Terminology
The prevailing thought is that that olivopontocerebellar degeneration, Shy-Drager syndrom...
Article
Ann Arbor staging system (historical)
The Ann Arbor staging system was the landmark lymphoma staging classification system for both Hodgkin lymphoma and non-Hodgkin lymphoma. It is named after the town of Ann Arbor in the US state of Michigan where the Committee on Hodgkin's Disease Staging Classification met in 1971 to agree on it....
Article
Pancreatic duct stone
A pancreatic duct stone, also known as calculus, is a stone embedded within the pancreatic ducts. They typically arise in the setting of chronic pancreatitis.
Terminology
Three terms other than pancreatic stones or calculi have been used to refer to calculi in the pancreatic ducts; primarily t...
Article
Detective quantum efficiency
Detective quantum efficiency (DQE) is one of the fundamental physical variables related to image quality in radiography and refers to the efficiency of a detector in converting incident x-ray energy into an image signal.
The words "quantum efficiency" have a precise meaning, because the DQE mea...
Article
Bremsstrahlung radiation
X-rays are produced by high-energy electrons bombarding a target, especially targets with a high proton number (Z). When bombarding electrons penetrate the target, some electrons travel close to the nucleus due to the attraction of its positive charge and are subsequently influenced by its elect...
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