Articles
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16,873 results found
Article
MR spectroscopy
The technique of magnetic resonance spectroscopy (usually shortened to MR spectroscopy or MRS) allows tissue to be interrogated for the presence and concentration of various metabolites. Grossman and Yousem said "If you need this to help you, go back to page 1; everything except Canavan (disease...
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Potential recuperation ratio (PRR)
Potential recuperation ratio (or Lausanne Stroke Index) is a simple quantitative measure of the relative size of ischemic penumbra compared to the non-salvageable ischemic core region in acute stroke. To calculate the PRR, a perfusion CT with infarct and penumbra maps is required. To do this, fi...
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Fabry disease
Fabry disease, also known as Anderson-Fabry disease, is a multisystem disorder resulting from an X-linked inborn error of metabolism and is a lysosomal storage disorder. The disease results from genetic mutations in the gene GLA that cause decreased or absent expression of hydrolase alpha-galact...
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Erythrocyte sedimentation rate
Erythrocyte sedimentation rate (ESR) is a non-specific marker of acute inflammation which is seen in a very wide spectrum of pathologies. It has been sidelined by the use of C-reactive protein and other acute phase markers but it still has an important role to play in the management of some cond...
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Applying to radiology training in the United Kingdom
Applying to radiology training in the United Kingdom (UK) is through a centralised process for England, Scotland and Wales. Northern Ireland's radiology training recruitment remains a separate process.
Applications are open to those completing or completing their Foundation Training or equivale...
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MRI contrast agent safety
Though considered safer than the frequently used iodinated contrast agents used in x-ray and CT studies, there are safety issues with MRI contrast agents as well. Paramagnetic metal ions suitable as MRI contrast agents are all potentially toxic when injected IV at or near doses needed for clinic...
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Right lower lobe collapse
Right lower lobe (RLL) collapse has distinctive features, and is usually relatively easily identified. The smaller overlying heart shadow obscures less lung compared with left lower lobe collapse.
Findings of lower lobe collapse can be grouped together as they are almost identical on both side...
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Hydroxyapatite deposition disease
Hydroxyapatite crystal deposition disease (HADD) or calcium apatite deposition disease (CADD) is a disease of uncertain etiology characterized by periarticular and intra-articular calcium deposits.
The shoulder is the most frequently involved site with classic calcific tendinitis presentation. ...
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Reporting and Data Systems (disambiguation)
There has been a proliferation of Reporting and Data Systems (RADS), which have been proposed - and in many cases widely adopted - as standardized systems for the reporting of imaging of various body organs, often, but certainly not always, with a focus on oncological disease 2. These systems al...
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Brachial plexus root subdivisions (mnemonic)
Mnemonics for brachial plexus root subdivisions include:
Rad Techs Drink Cold Beer
Robbie T Drinks Cold Beer
Rugby Teams Drink Cold Beers
Reach To Drink Cold Beer
Read That Damn Cadaver Book
Really Tired, Don't Care Now (nerve instead of branch)
Red Toucans Don't Come Back
Mnemonic
Whe...
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Subacute hypersensitivity pneumonitis (historical)
Subacute hypersensitivity pneumonitis (also known as subacute extrinsic allergic alveolitis) is a legacy term not recommended in the guidelines (c. 2020) 10. It develops when hypersensitivity pneumonitis continues beyond the acute phase (i.e. continues for weeks to months) and still has the pote...
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Perthes disease
Perthes disease, also known as Legg-Calvé-Perthes disease, refers to idiopathic osteonecrosis of the femoral epiphysis seen in children.
Terminology
Perthes disease should not be confused with Perthes lesion of the shoulder.
Epidemiology
Perthes disease is relatively uncommon and in Western...
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MR arthrogram solution
MR arthrogram solution is a gadolinium-containing mixture injected into a joint for MR arthrography.
Terminology
Fluoroscopy, ultrasound or CT guidance can be used to cannulate a joint, which is then injected with the MR arthrogram solution. MR arthrogram solutions differ in different instit...
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Glenohumeral arthrography
Glenohumeral (shoulder) arthrography is an imaging technique used to evaluate the glenohumeral joint to evaluate the joint components. A glenohumeral joint injection is usually performed under fluoroscopic guidance although ultrasound and CT can be also be used. An alternative to direct arthrogr...
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Volar plate avulsion injury
Volar plate avulsion injuries are a type of avulsion injury. The volar plate of the proximal interphalangeal (PIP) joint is vulnerable to hyperextension injury, in the form of either a ligament tear or an intra-articular fracture.
Gross anatomy
The volar plate forms the floor of the PIP joint ...
Article
Keifhaber-Stern classification of volar plate avulsion injuries
The Keifhaber-Stern classification can be used to classify volar plate avulsion injuries of the fingers.
Usage
Along with the Eaton classification, this classification is considered (c. 2016) one of the most useful for the management of volar plate avulsion injuries 2.
For Keifhaber-Stern cl...
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Eaton classification of volar plate avulsion injury
The Eaton classification can be used to classify volar plate avulsion injuries of the fingers.
Usage
Along with the Keifhaber-Stern classification, this classification is considered (c. 2016) one of the most useful classifications for the management of volar plate avulsion injuries 2.
Knowle...
Article
Mumps
Mumps is a (usually) self-limited viral infection that often occurs in epidemics among children. Its incidence has markedly diminished in countries with childhood vaccination programs, but may still be seen in adult patients who have not received vaccinations or who have waning immunity. It may ...
Article
Ovarian serous tumors
Ovarian serous neoplasms are the commonest of four general types of the epithelial ovarian tumors, and are more prevalent than the mucinous ovarian tumors.
Serous ovarian neoplasms are subdivided into benign, borderline, and malignant lesions according to their malignant potential and clinical ...
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Adrenal myelolipoma
Adrenal myelolipomas are rare, benign and usually asymptomatic tumors of the adrenal gland characterized by the predominance of mature adipocytes.
On imaging, they usually present as large masses with a variable amount of fat-containing components.
Epidemiology
Myelolipomas are rare tumors o...