Daniel Bell

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Aorto-ventricular tunnel

2 months ago | radiopaedia.org | Daniel Bell |Arlene Campos

Aorto-ventricular tunnel (AVT) is an extremely rare form of congenital heart disease, representing an anomalous extracardiac communication between the ascending aorta and the left or right ventricles. In most cases the anomalous communication is between the aorta and the left ventricle and therefore the term aorto-left ventricular tunnel (ALVT) is used. Rarely the abnormal connection is with the right ventricle, in which case the term aorto-right ventricular tunnel (ARVT) is used instead.
Medical abbreviations and acronyms (K)

Dec 3, 2024 | radiopaedia.org | Daniel Bell |Craig Hacking

Citation: Bell D, Hacking C, Sharma R, et al. Medical abbreviations and acronyms (K).
Flat back syndrome

Jul 29, 2024 | radiopaedia.org | Daniel Bell |Henry Knipe

Flat back syndrome (FBS) refers to the decrease or absence of the normal lumbar lordosis resulting primarily in chronic low back pain. Flat back syndrome is a different condition from straight back syndrome and the two should not be confused or conflated. Most typically it presents with persistent low back pain.
Rectocele | Radiology Reference Article | Radiopaedia.org

Jul 29, 2024 | radiopaedia.org | Yuranga Weerakkody |Daniel Bell

Rectocele refers to a herniation or bulge of the rectal wall, with the most common type being an anterior rectocele where the bulge is into the posterior vaginal wall in a female patient. Rectoceles can also occur posteriorly or laterally. Rectocele is the term most commonly used by colorectal surgeons, and the same entity is referred to as a posterior vaginal prolapse by urogynaecologists.
Blood | Radiology Reference Article | Radiopaedia.org

Jul 25, 2024 | radiopaedia.org | Daniel Bell |Tariq Walizai

Blood is a connective tissue usually found in a liquid phase; it comprises a fluid component called plasma (about 55% of the total volume), in which lies the cellular component, comprising several cell lineages, primarily the white blood cells, red blood cells and platelets. In an average adult male the total volume of blood is ~5.5 liters.
Gray (SI unit) | Radiology Reference Article | Radiopaedia.org

Jul 24, 2024 | radiopaedia.org | Daniel Bell |Henry Knipe

The gray (symbol Gy) is the SI unit of absorbed dose and is defined as the absorption of one joule of energy in the form of ionizing radiation per kilogram of matter, i.e. one gray = 1 J/kg 2. TerminologyOne gray is a large unit and is usually used with a prefix, e.g. milligray (mGy), microgray (μGy). As per all other eponymous SI units, the unit is not capitalized when written out in full, but it is capitalized when shortened to its symbol.
Hyperechoic liver lesions

Jul 23, 2024 | radiopaedia.org | Yuranga Weerakkody |Daniel Bell

A hyperechoic liver lesion on ultrasound can arise from a number of entities, both benign and malignant. A benign hepatic hemangioma is the most common entity encountered, but in patients with atypical findings or risk for malignancy, other entities must be considered.
Rheumatic fever | Radiology Reference Article | Radiopaedia.org

Jul 22, 2024 | radiopaedia.org | Frank Gaillard |Daniel Bell

Rheumatic fever is an illness caused by an immunological reaction following group A streptococcal infection.
Coalition | Radiology Reference Article | Radiopaedia.org

Jul 21, 2024 | radiopaedia.org | Daniel Bell |Amanda Er

A coalition is a joining of two bones that are normally discrete 1. It is usually a congenital abnormality. The bridge between the bones is initially fibrous, then gradually becomes cartilaginous, finally ossifying. Symptoms tend to arise as the coalition forms a synostosis, which is usually from 8 to 16 years of age 2,3.
Radiograph | Radiology Reference Article | Radiopaedia.org

Jul 20, 2024 | radiopaedia.org | Daniel Bell |Tariq Walizai

A radiograph (or plain radiograph although the word 'plain' is strictly superfluous) is the radiologist's preferred term for the static image generated following the passage of x-rays through the patient. Non-imaging clinicians and the lay population generally use the term "x-ray" to refer to a radiograph, as well as for the radiation itself; e.g. a chest radiograph is often referred to as a chest x-ray.