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.
16,887 results found
Article
Aluminum
Aluminum (chemical symbol Al) is a trace metal and a nonessential element which is widely distributed throughout the Earth’s crust.
Chemistry
Physical chemistry
Aluminum is an element with the atomic number 13, one of the post-transition metals in the boron group (Group 13, IIIA) of the perio...
Article
Describing recency
Describing when medical information was generated (e.g. new evidence, discoveries) is commonplace and often essential within articles.
When providing these descriptions, the preference is to avoid the use of 'recent', variations thereof (e.g. 'recently'), and synonyms thereof (e.g. 'new', 'late...
Article
SRU management guidelines for gallbladder polyps
The Society of Radiologists in Ultrasound (SRU) consensus recommendation for the management of incidentally detected gallbladder polyps was published in 2021 1.
Usage
The SRU consensus recommendation is one of many guidelines for the management of incidentally detected gallbladder polyps. The ...
Article
Imaging technology article structure
Articles about imaging technology require a different structure than articles about disease. Articles with this structure are generally assigned to the imaging technology section and may also be assigned to a specific system if appropriate.
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Article
Notch of Harty
The notch of Harty or the anteromedial tibial notch is a pseudodefect and an anatomic variant of the ankle joint 1-4.
Gross anatomy
The notch of Harty is a groove located in the anteromedial region of the tibial plafond. Based on a previous anatomical study, this defect measures 5-10 mm in med...
Article
Double patellar tendon
A double patellar tendon is an extremely rare anomaly, thought to be related to the embryological development of the patella and patellar tendon. It may appear as a crossed or uncrossed-doubled tendon on imaging 1-4.
Epidemiology
Double patellar tendon appears to be a rare anomaly with only a...
Article
Bracket sign (disambiguation)
A bracket sign has been named in multiple contexts:
bracket sign in CT brain of calcification in tubulonodular pericallosal lipoma
bracket sign in MRI brain of of the superior most extent of the pars marginalis of the cingulate sulcus
Article
Rhodium (Rh)
Rhodium (chemical symbol, Rh) is a precious metal of atomic number 45 and atomic weight 102.90549 1. It belongs to Groups 8-10 and Periods 5 and 6 of the periodic table 1.
Use in medical imaging
Rhodium is important in medical imaging primarily for its use as a target (anode) and/or filter in ...
Article
Penetrating trauma
Penetrating trauma is a type of trauma in which a foreign body or bodies penetrate the skin, create a wound and injure the deeper tissues. The foreign body can remain in the patient or can exit the patient, either through the same entry wound (e.g. knife stabbing) or via a separate exit wound (t...
Article
Heterozygous HTRA1-related cerebral small vessel disease
Heterozygous HTRA1-related cerebral small vessel disease, also known as cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy type 2 (CADASIL2), is a very rare monogenic cerebral small vessel disease.
Heterozygous HTRA1-related cerebral small vessel disease ...
Article
Vasa vasorum
The vasa vasorum represents the supporting microvasculature of the larger caliber arteries and veins of the body.
Gross anatomy
The vasa vasorum has two subtypes in humans 2,3:
arterial vasa vasorum: arises from various arteries based on anatomical location (e.g. intercostal arteries for desc...
Article
Foix-Chavany-Marie syndrome
Foix-Chavany-Marie syndrome, also known as bilateral anterior opercular syndrome or anterior operculum syndrome, is a cortical form of pseudobulbar palsy classically caused by bilateral anterior opercular lesions.
Clinical presentation
The clinical presentation is of pseudobulbar palsy that is...
Article
String of pearls sign (Susac syndrome)
The string of pearls sign is a radiological sign described in Susac syndrome.
The string of pearls sign is seen on diffusion-weighted imaging (DWI) whereby there are multiple punctate microinfarcts topographically located along the internal capsule 1-3. These are always accompanied by similar i...
Article
Light chain amyloidosis
Amyloid light chain (AL) amyloidosis or immunoglobulin light chain amyloidosis is a systemic amyloidosis and a plasma cell proliferative disorder characterized by deposition of misfolded monoclonal kappa or lambda light chains produced by clonal plasma cells 1-6.
Epidemiology
Amyloid light cha...
Article
EULAR-OMERACT ultrasound scoring system for synovitis in rheumatoid arthritis (RA)
The EULAR-OMERACT ultrasound scoring system for synovitis in rheumatoid arthritis (RA) is a standardized method for assessing synovial inflammation using ultrasound imaging. This scoring system was developed collaboratively by the European League Against Rheumatism (EULAR) and the Outcome Measu...
Article
Leukemoid reaction
A leukemoid reaction refers to a marked increase in white blood cells (>50000 cells/mL), typically neutrophils, which manifests as an acute inflammatory reaction that can mimic leukemia.
Pathology
Leukemoid reactions often occur from accelerated release of cells from the bone marrow.
Features...
Article
Bronchomalacia
Bronchomalacia describes weak bronchial cartilage which allows excessive airway collapsibility, best demonstrated on dynamic CT in forced expiration 1. Importantly, substantial collapse can occur in normal healthy individuals and there is considerable overlap so that CT appearances alone are non...
Article
Bronchocele
The term bronchocele indicates focal bronchial dilatation and is often associated with mucoid impaction and impaired ventilation.
Pathology
Bronchoceles can be congenital (e.g. bronchial atresia) or acquired due to retained secretions or proximal obstruction (e.g. endobronchial tumor) 1.
Radi...
Article
Airspace
Airspace is defined by the Fleischner 2024 glossary as the gas-containing part of the lung parenchyma.
Summary
The term airspace refers to respiratory bronchioles, alveolar ducts and alveoli.
Terminal bronchioles and other airways that are only conductive are excluded.
Related pathology
Air...
Article
Mycetoma (lung)
A pulmonary mycetoma, also known as a fungus ball, is due to colonization of a pre-existing cavity by a fungus, usually a species of Aspergillus, in which case it is termed an aspergilloma 1.
Terminology
Pulmonary mycetoma is unrelated to soft-tissue mycetoma, also known as Madura foot. The la...
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