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.
16,441 results found
Article
Prognathism
Prognathism or mandibular prognathism refers to a type of morphological jaw positional anomaly in which the lower jaw protrudes ahead of the upper jaw. This results in an extended chin and dental malocclusion. It can be associated with certain conditions such as
acromegaly
syphilis - late cong...
Article
Lymphoplasmacytic lymphoma
Lymphoplasmacytic lymphoma (LPL) is an uncommon type of B-cell non-Hodgkin lymphoma. In this condition, the affected tissues (usually bone marrow) become infiltrated by small lymphocytes, plasmacytoid lymphocytes, and plasma cells.
Some publications state this condition synonymous with Waldens...
Article
Atypical neurofibromatous neoplasms of uncertain biologic potential (ANNUBP)
Atypical neurofibromas and atypical neurofibromatous neoplasms of uncertain biologic potential (collectively AN/ANNUBP) refer to neurofibromas with atypical histological features. They are considered premalignant with an increased risk of progressing to a malignant peripheral nerve sheath tumor....
Article
Pica
Pica refers to a psychiatric disorder in which patients report a craving for and compulsive consumption of substances that are not food. Substances consumed include earth, clay, plaster, paint chips, string, hair, animal feces and stones 1.
Epidemiology
Although the condition can present in a...
Article
Subscapularis tendon tear
Subscapularis tendon tears are a less common rotator cuff tear, and have been considered more difficult to diagnose pre-operatively (both clinically and radiological) and have been known as a "hidden lesion" 5. Accurate pre-operative diagnosis is important as it affects the surgical approach and...
Article
Infectious tenosynovitis
Infectious or septic tenosynovitis refers to an infection of the closed synovial tendon sheath 1-3.
Terminology
The term ‘infectious or septic tenosynovitis’ applies for tendons with a tendon sheath, for tendons without a tendon sheath with a paratenon the term ‘infective paratenonitis’ can be...
Article
CSF alpha-fetoprotein
Alpha-fetoprotein (AFP) in the cerebrospinal spinal fluid (CSF) has been reported as a tumor marker for some intracranial tumors with yolk sac elements, and teratoma 1.
Interpretation
Elevation
intracranial yolk sac tumor
intracranial embryonal carcinoma
congenital CNS tumors with yolk sac ...
Article
Falling injuries
Falling injuries are the second most common cause of accidental or unintentional deaths in the world. Falling trauma is the most common mechanism of injury in persons 21 years old or younger 1,2.
Clinical presentation
Many factors influence the presentation of a fall-from-height victim, such a...
Article
Pediatric shoulder (lateral view)
The lateral shoulder view in pediatrics is part of a two view series examining the shoulder joint, clavicle, scapula and proximal humerus.
Indications
This projection is an orthogonal view of the AP shoulder and is useful in pediatric imaging for identifying potential fractures or dislocation...
Article
Fibrolamellar hepatocellular carcinoma (mnemonic)
The features of fibrolamellar hepatocellular carcinoma can be recalled using this mnemonic:
PSYCH
Mnemonic
P: pseudocapsule
S: scar (fibrotic)
Y: young patients
C: capsular retraction
H: huge and heterogeneous
Article
Soft tissue abscess
Soft tissue abscesses are focal or localized collections of pus caused by bacteria or other pathogens surrounded by a peripheral rim or abscess membrane found within the soft tissues in any part of the body 1.
Soft tissue abscesses include subcutaneous abscesses, intramuscular abscesses and int...
Article
Brain and Spinal Cord Injury Center score
The Brain and Spinal Injury Center (BASIC) score is a classification system for grading acute traumatic spinal cord injury based on the axial extent of intramedullary signal abnormality on T2 weighted MRI.
Classification
The BASIC score is an ordinal scale that is graded 0 to 4 1:
BASIC 0 (no...
Article
Foot (DP talus view)
The medial oblique axial talus view, also known as the Canale view, is a specialized projection of the talus bone, more specifically the talar neck.
Indications
This view is specifically indicated when assessing talar neck fracture and/or their follow-up. It is particularly useful to assess va...
Article
Intracranial yolk sac tumor
Intracranial yolk sac tumors represent 2% of nongerminomatous germ cell tumors 1.
Epidemiology
Intracranial yolk sac tumors commonly occur in childhood or adolescence. CSF alfa fetoprotein can act as a tumor marker for yolk sac tumors.
Radiographic features
Intracranial yolk sac tumors are...
Article
Upper lobe fibrocavitary pattern of mycobacterium avium complex pulmonary disease
Upper lobe fibrocavitary pattern of mycobacterium avium complex pulmonary disease is morphological from pulmonary mycobacterium avium complex infection although it is worthwhile understanding that there can be a spectrum of the disease with mixed forms.
This form had been initially the traditi...
Article
Robinson classification of clavicle fractures
The Robinson classification of clavicle fractures, as well as the AO/OTA and Neer classification systems, is a frequently used classification system for assessing clavicular fractures.
The Robinson classification is based on a review of a thousand patients and was developed to provide a guide t...
Article
Portal venous flow
Portal venous flow is normally towards the liver (hepatopetal), with the normal main portal vein peak systolic velocities usually ranging between 20-40 cm/s.
In pathological situations, the flow velocity may decrease or even invert resulting in hepatofugal flow.
The flow waveform is usually sm...
Article
Center edge angle of Wiberg
The center-edge angle (CEA) of Wiberg is a measurement in the pelvis which is the angle formed by Perkin line and a line from the center of the femoral head to the lateral edge of the acetabulum. It can be used to assess for conditions such as developmental dysplasia of the hip although only con...
Article
Suspected physical abuse - head injuries
Suspected physical abuse, also known as non-accidental injury (NAI), can result in a range of head injuries.
Pathology
Infants have a relatively large head size as compared to their body mass, weak neck muscles, large subarachnoid space, relatively flat skull base and pliable, thin skull. The ...
Article
Infant-type hemispheric glioma
Infant-type hemispheric gliomas, also known as infant high-grade gliomas, are high-grade brain tumors occurring in children.
Terminology
Infant-type hemispheric gliomas belong to the family of "pediatric high-grade diffuse gliomas" of the 2021 WHO Classification of Tumors of the Central Nervou...
Article
Dark-field computed tomography
Dark-field computed tomography is an emerging medical imaging technology. While conventional CT measures differential attenuation properties of the various tissues, dark-field CT utilizes their small-angle scattering (dark field) characteristics.
Physics
Instead of attenuation of x-ray photon...
Article
Aggressive vs non-aggressive bone lesions (radiographs)
Bone lesions are generally characterized as either aggressive versus non-aggressive bone lesions, with radiographs comprising much of the initial assessment.
Imaging features
When describing a bone lesion, some of its features reflect its biological activity. These characteristics include zon...
Article
Cruciate ligament tears (knee)
The cruciate ligaments of the knee commonly tear:
anterior cruciate ligament (ACL) tear
the ACL is the most commonly torn knee ligament 1
posterior cruciate ligament (PCL) tear
tears of the PCL are less common and usually less significant 2
Article
Right ventricular outflow tract obstruction
A right ventricular outflow tract obstruction (RVOTO) refers to any form of obstruction exerting effects on the right ventricular outflow tract. The obstruction itself however can occur at various sites inclusive of the following levels:
mid-right ventricle
infundibulum (e.g. tetralogy of Fall...
Article
Diffuse pediatric-type high-grade gliomas, H3-wildtype and IDH-wildtype
Diffuse pediatric-type high-grade gliomas, H3-wildtype and IDH-wildtype are high-grade pediatric tumors recently included in the 5th Edition (2021) of the WHO brain tumor classification.
Terminology
Diffuse pediatric-type high-grade gliomas H3-wildtype and IDH-wildtype are classified among the...
Article
Canine space
The canine space, or infraorbital space, is a paired compartment in the soft tissues of the face, overlying the maxilla near the canine tooth root and covered by the levator labii superioris muscle.
Gross anatomy
The canine space contains fat and branches of the infraorbital nerve.
Boundaries...
Article
Congenital pouch colon
Congenital pouch colons are an anomaly in which there is cystic dilation of a shortened colon. They can either partially or totally replace the colon.
Pathology
Associations
Congenital pouch colons can be associated with vaginal or vestibular fistulas and less frequently with other genitourin...
Article
Posterior fossa ependymoma
Posterior fossa ependymomas are the most common type of ependymoma, most commonly occurring in children. They are divided on the basis of DNA-methylation profiling into two groups, A and B.
Epidemiology
Posterior fossa ependymomas are encountered in all age groups but are usually encountered ...
Article
PIK3CA-related overgrowth spectrum (PROS)
PIK3CA-related overgrowth spectrum (PROS) is a broad group of segmental overgrowth disorders that can occur with or without associated vascular anomalies, caused by activating mutations in the PIK3CA gene, which are also responsible for the vast majority of isolated lymphatic malformations and s...
Article
Talocrural angle
The talocrural angle can be used to assess for fibular shortening after a fracture.
Measurement
The talocrural angle is measured on the mortise view as the angle between a line along the distal tibial plafond articular surface and another line joining the tips of both malleoli 3,4.
Interpret...
Article
DNA-methylation
DNA-methylation is an epigenetic modification of DNA by the addition of methyl groups (-CH3) which in turn results in changes to numerous processes including how genes are expressed.
The specific pattern of methylation is specific to different tissues, can change over time depending on physiol...
Article
Contraceptive implant migration
Contraceptive implant migration is a rare complication of etonogestrel implant insertion.
Clinical presentation
unable to palpate device in the upper arm
chest pain
dyspnea
non-productive cough
menorrhagia
irregular vaginal bleeding
Pathology
Contraceptive implants are m...
Article
Collar sign in spondylolysis
The Collar sign in spondylolysis refers to a break in the pars interarticularis of the vertebra on oblique radiographs that can have the appearance of a collar around the Scotty dog's neck.
unilateral or bilateral
90% seen at the L5 level and less than10% noted at the L4 level1,2
65% of patie...
Article
Sliding hiatus hernia
A sliding hiatus hernia or type 1 hiatus hernia is considered the most common type of hiatus hernia. They can be present to varying degrees and can also co-exist with other types (inclusive of a rolling hiatus hernia).
Clinical presentation
Many patients may have gastro-esophageal reflux. Some...
Article
Timed barium esophagogram
The timed barium esophagogram (TBO) is a simple physiologic assessment and objective method for assessing the esophageal emptying used in patients with suspected achalasia and to evaluate and follow up patients who have been treated with myotomy or pneumatic dilatation1,3.
Technique
Several te...
Article
Mackler's triad
Mackler's triad consists of the clinical symptoms of vomiting, followed by severe pain in the chest, usually retrosternal, lower thoracic, and upper abdominal, associated with subcutaneous emphysema detected on physical examination, which is suggestive of esophageal rupture (Boerhaave syndrome) ...
Article
Anderson triad
The Anderson triad consists of the clinical findings of tachypnea and abdominal rigidity with lower thoracic or epigastric pain, associated with subcutaneous emphysema, which is usually related to esophageal rupture.
Article
Sea anemone sign
The sea anemone sign is a unique (but not wholly exclusive) appearance seen in ovarian serous surface papillary borderline tumors (SSPBT). It refers to its surface stroma frequently branches into exophytic papillary stalks, macroscopically 1.
Radiographic features
On cross-sectional imaging, p...
Article
First metatarsal declination angle
The first metatarsal declination angle can be used to assess for metatarsus primus elevatus in hallux rigidus.
Measurement
The first metatarsal declination angle is formed between the longitudinal axis of the first metatarsal and the supporting surface 1-4.
Interpretation
normal: 20-21° 1-...
Article
Nephrostogram
Nephrostogram, also known as antegrade pyelogram, is a special x-ray procedure that fluoroscopically evaluates the upper collecting system by introducing water-soluble contrast through the nephrostomy catheter.
Indications
Nephrostogram can be useful to determine tube position or assess resid...
Article
Subhepatic appendicitis
Subhepatic appendicitis refers to inflammation of the appendix in which the appendix and cecum have failed to descend inferiorly during normal development; resulting in a "subhepatic" position.
Epidemiology
Presentation of an inflamed subhepatic appendix is exceedingly uncommon, representing o...
Article
Patellofemoral angle
The patellofemoral angle is a measure of patellar tilt and is useful in the diagnosis of patellofemoral instability and excessive lateral pressure syndrome.
Measurement
The patellofemoral angle is formed between a line drawn along the bony lateral patellar facet and another line drawn along t...
Article
Diffuse hemispheric glioma H3 G34 mutant
Diffuse hemispheric gliomas, H3 G34 mutant are rare and high grade infiltrating tumors typically presenting in adolescents and young adults.
Terminology
Diffuse hemispheric gliomas H3 G34 mutant have been recently included in the 5th Edition (2021) of the WHO brain tumor classification 1 among...
Article
Regional migratory osteoporosis
Regional migratory osteoporosis is a rare arthralgia affecting the weight-bearing joints of the lower limb.
Epidemiology
Regional migratory osteoporosis is most common in middle-aged men 1.
Clinical presentation
The classic clinical presentation is a history of non-traumatic joint pain, whi...
Article
Ilizarov apparatus
The Ilizarov apparatus (aka Ilizarov frame) is an external metallic orthopedic fixation device used to length or reshape limbs from congenital deformity or following injury. It acts through the slow bone extension and soft tissues including nerves, blood vessels and muscles.
Uses
bone lengthe...
Article
Rheumatoid arthritis associated interstitial lung disease
Rheumatoid arthritis associated interstitial lung disease (RA-ILD) is one of the pulmonary manifestations of rheumatoid arthritis.
Epidemiology
There may be a greater male predilection with onset of lung disease typically occurring in the 5th to 6th decades of life 5.
Radiographic features
C...
Article
Trichilemmal cyst
Trichilemmal cysts, also known as pilar cysts, are benign accumulations of keratin along the outer hair root sheath, most commonly on the scalp. They are the most common subcutaneous nodule incidentally found on head imaging and are of no clinical relevance when asymptomatic 1. Uncommonly, they ...
Article
Medulloepithelioma of the optic disc and optic nerve
Medulloepitheliomas of the optic disc and optic nerve are extremely rare primary intraocular embryonal tumors arising from the optic disc and optic nerve.
Terminology
A medulloepithelioma of the optic disc and optic nerve may also be referred to as a diktyoma or teratoneuroma, although the use...
Article
Ovary size and volume
Ovary size and volume is frequently determined with ultrasound. The volume estimate is calculated by the formula for an ellipsoid, where D1, D2, and D3 are the three axial measurements:
D1 x D2 x D3 x 0.52
The normal, adult, non-pregnant, mean ovary volume of women who are not postmenopausal i...
Article
Tumor pseudoprogression (disambiguation)
Tumor pseudoprogression, also known just as pseudoprogression, corresponds to an increase of lesion size related to treatment, and in some cases even development of transient new lesions, which mimics true disease progression.
Tumor pseudoprogression is increasingly recognized, and can be enco...
Article
Tumor pseudoprogression (lung cancer)
Radiologic tumor pseudoprogression on imaging denotes an imaging appearance of tumor response where the tumor first exhibits findings suggestive of progression (i.e. growth, new lesions). However, during sustained therapy, response is eventually demonstrated 1.
Epidemiology
With the advent of ...
Article
Reye syndrome
Reye syndrome is a rare pediatric condition characterized by acute onset encephalopathy, severe vomiting and fatty liver failure. It typically presents in children recovering from a viral illness, most commonly influenza or chickenpox 1.
Epidemiology
Reye syndrome is usually seen between the ...
Article
Cacosmia
Cacosmia refers to a form of olfactory dysfunction where the patient has an inability to "recognize" smells. It can arise from a number of pathologies and can include peripheral sinonasal and central sensorineural components. In this situation, the patient knows there is a smell but cannot disti...
Article
Endometrial osseous metaplasia
Endometrial osseous metaplasia is a very rare pathological condition whereby there may be mature bone formation within the endometrium. This process may be a cause of menorrhagia and/or infertility.
See also
endocervical osseous metaplasia and cervical osseous metaplasia (may represent the sam...
Article
Endocervical microcalcifications
Endocervical microcalcifications can often be an incidental finding and may represent part of the same spectrum of endometrial microcalcifications. They are generally favored benign 1.
They may be seen as tiny echogenic foci in the endocervical region on ultrasound.
See also
endocervical osse...
Article
Comma sign of subscapularis tear
The comma sign of subscapularis tear was first described on arthroscopy but recognized later on MRI. The comma sign represents a full thickness partial width superior subscapularis tear along with torn superior glenohumeral and coracohumeral ligament insertional fibers vertically retracted via a...
Article
Pulmonary valve calcification
Pulmonary valve calcification is an uncommon occurrence and usually occurs in the presence of longstanding elevation of right ventricular pressures (such as that of severe pulmonary hypertension). It can also be associated with pulmonary valve stenosis. Some authors suggest if valve calcificatio...
Article
Pediatric shoulder (AP view)
The anteroposterior shoulder view in pediatrics is part of a two view series examining the shoulder joint, clavicle, scapula and proximal humerus.
Indications
This projection demonstrates the shoulder joint in natural anatomical position and is used as an orthogonal view to the lateral should...
Article
Broden's view
The Broden's view (or Broden view) is a specialized projection that accurately 1 examines the large posterior calcaneal facet and the subtalar joint 2.
As technology advances, computed tomography (CT) has widely been used to better visualize and characterize fragment displacements and fracture ...
Article
Fourth-fifth intermetatarsal angle
The fourth-fifth intermetatarsal angle is used to assess for a bunionette deformity. It should not be confused with the first intermetatarsal angle, used to assess for hallux valgus deformity.
Measurement
The fourth-fifth intermetatarsal angle is formed between the long axis of the fourth and...
Article
Glenoid version angle
The glenoid version angle can be determined by either the Friedman method or the scapular blade method. Glenoid version is important in the preoperative assessment for shoulder arthroplasty and can also be useful in the diagnosis of glenoid dysplasia and causes of recurrent glenohumeral instabil...
Article
Tuberculous bronchostenosis
Tuberculous bronchostenosis is a potential complication that can occur from endobronchial tuberculosis, especially in a chronic form.
Pathology
Bronchostenosis usually begins as simple erythema and edema with lymphocytic submucosal infiltration followed by tubercle formation. Destruction and r...
Article
Friedman line
The Friedman or scapular line can be used to determine glenoid version and glenoid bone loss 4. Glenoid version angle measured by the Friedman method has better inter-reader reliability than the scapular body method 2.
Measurement
The Friedman line is drawn along the long axis of the scapula ...
Article
Superior hypogastric nerve block
Superior hypogastric nerve block is a valuable tool for pain relief in the setting of uterine fibroid embolization. This procedure results in significant ischemic pain, peaking at 6-8 hours and lasting approximately 24 hours, then followed by a lesser degree of post-embolization pain which can l...
Article
AP Meary's angle
AP Meary's angle or AP talus-first metatarsal angle is used to assess for midfoot abduction/adduction in pes planus and pes cavus to assist with pre-operative planning 1.
Measurement
On a weight-bearing AP foot radiograph, a line is drawn down the longitudinal axis of the first metatarsal to ...
Article
Medulloepithelioma of the brain
Medulloepitheliomas of the brain are rare, highly malignant, primitive embryonic tumors derived from the primitive medullary plate and neural tube. These tumors, once considered distinct entities, are now thought to be a pattern of embryonal tumors with multilayered rosettes. Please refer to tha...
Article
Posterior tibial line
The posterior tibial line is drawn along the posterior aspect of the distal tibial shaft on a lateral ankle x-ray and can be used to assess the sagittal alignment of the talus when comparing side-to-side and/or calculate the posterior tibial line-talar ratio 1,2.
Article
Suboccipital cavernous sinus
The suboccipital cavernous sinuses are paired venous plexuses that surround the horizontal (distal V3) portion of the vertebral arteries at the craniocervical junction. Its name derives from its resemblance to the cavernous sinus as it is a venous cushion surrounding a large arterial loop at the...
Article
Supraodontoid space
The supraodontoid space, also known as the supradental space or apical cave, is an extradural space at the anterior craniocervical junction superior to the odontoid process of C2 (dens axis).
Gross anatomy
Boundaries
The space is a cave-shaped region facing posteriorly with the following boun...
Article
Tuli classification of occipital condyle fractures
The Tuli classification of occipital condyle fractures is a clinically-oriented system for describing these injuries based on fracture displacement and ligamentous injury. It is newer than the more well-known Anderson and Montesano classification of occipital condyle fractures and allows the inc...
Article
CNS neuroblastoma, FOXR2-activated
Central nervous system neuroblastoma, FOXR2-activated is a novel brain tumor entity recently included in the WHO brain tumor classification 1.
Terminology
Central nervous system neuroblastoma with FOXR2 activation was identified in 2016 as a new molecular entity, distinguished from primitive n...
Article
Hair
Hair (TA: pilus/pili) remains important physiologically and psychologically for humans. The hair shaft develops from a structure known as the hair follicle. Each hair has an arrector pili muscle and both sensory and sympathetic neural connections.
Gross anatomy
The hair shaft (TA: stipes pili)...
Article
Tram-track sign (knee)
The tram-track sign refers to the posterior cruciate ligament (PCL) appearance when it has a diffuse or partial thickening of the anteroposterior diameter greater than 7 mm. It is associated with longitudinal intraligamentous signal abnormalities showing fluid signal characteristics (hyperintens...
Article
Posterior superior aortic recess
The posterior superior aortic recess, also known as the superior pericardial recess or the superior sinus, is one of the variable invaginations of the superior aortic recess and is located posterior to the ascending aorta. It may mimic mediastinal lymphadenopathy or a bronchogenic cyst.
Article
Posterior pericardial recess
The posterior pericardial recess is one of the pericardial recesses forming a small space within the pericardium. It arises from the superior margin of the oblique pericardial sinus, posterior to the right pulmonary artery and medial to the bronchus intermedius.
It may mimic mediastinal lymphad...
Article
Medial cuneiform to second metatarsal distance
Medial cuneiform to second metatarsal distance is the measurement of the distance between the lateral aspect of the medial cuneiform and the medial aspect of the base of the second metatarsal bone 1,2.
Usage
Medial cuneiform to second metatarsal distance is an important measurement used in ass...
Article
Post-traumatic pseudolipoma
Post-traumatic pseudolipomas, also known as post-traumatic lipohypertrophy, are prominent increases in the volume of subcutaneous adipose tissue or even benign tumors arising at the location of a preceding blunt soft tissue trauma 1.
Clinical presentation
Focal palpable mass, not tender and wi...
Article
Lateral tibiotalar distance
Lateral tibiotalar distance is a measurement on an ankle anterior drawer lateral view to assess for ankle instability.
Measurement
On an ankle anterior drawer lateral view (typically performed using a Telos device 2-4), the distance between the posterior tip of the distal tibial articular sur...
Article
Furuncle
A furuncle, also known as a boil, is an infected hair follicle with extension through the dermis into the subcutaneous soft tissues (cf. folliculitis, a more superficial hair follicle infection, with pus limited to the epidermis).
Epidemiology
Risk factors
Outbreaks of furunculosis are seen, ...
Article
Double beak sign
The double beak sign refers to the sudden tapering that two adjacent intestinal loops show in the internal hernia at the transition point of the closed loop obstruction.
The marked reduction in caliber results in distension of the afferent and efferent intestinal loops.
History and etymology
I...
Article
Eburnation
Eburnation describes the appearance of bone following a degenerative process in which subchondral or otherwise exposed bone acquires a non-anatomical sclerotic, microimpacted, and "polished" articular surface.
This phenomenon typically arises in one of two situations:
hypertrophic non-union of...
Article
Folliculitis
Folliculitis (plural: folliculitides) is an inflammation of the hair follicle, which is usually infective and due to bacteria, most commonly Staphylococcus aureus.
Epidemiology
Folliculitis is more common in men 1.
Risk factors
shaving
hot tubs, especially Pseudomonas aeruginosa
hot clima...
Article
Nunley-Vertullo classification
The Nunley-Vertullo classification is one of several classification systems used for the categorization of Lisfranc injuries. It is based on clinical, x-ray and bone scan findings and also associates the stages with management options or recommendations regarding those injuries 1-3.
Usage
The ...
Article
Intraparotid nodal metastases
Intraparotid nodal metastases refer to metastatic involvement of intraparotid lymph nodes from either a primary parotid tumor or an extraparotid tumor in the head and neck (e.g. nasopharyngeal carcinoma).
Pathology
Location
There may be a predilection towards the superficial lobe or tail regi...
Article
Long axial hindfoot alignment view
The long axial hindfoot alignment view is a specialized, weight-bearing radiographic view that examines the hindfoot alignment as part of a foot and ankle instability investigation.
The long axial view requires no equipment and has higher inter-observer reliability compared to the standard hin...
Article
Hindfoot alignment view
The hindfoot alignment view is a specialized, weight-bearing radiographic view that examines the hindfoot alignment as part of a foot and ankle instability investigation.
The long axial view requires no equipment and has higher inter-observer reliability when measuring angular hindfoot alignme...
Article
Foot (weight-bearing medial oblique view)
The weight-bearing medial oblique view of the foot is a specialized projection that places the foot under normal weight-bearing conditions. The projection is utilized to assess the foot under stress and better demonstrate structural and functional deformities.
Indications
This projection is ...
Article
Ankle (weight-bearing mortise view)
The weight-bearing mortise (mortice is equally correct) view of the ankle is a specialized projection that places the joint under normal weight-bearing conditions. The projection is utilized to assess the joint under stress and better demonstrate structural and functional deformities.
Termino...
Article
Ankle (weight-bearing AP view)
The weight-bearing AP view of the ankle is a specialized projection that places the joint under normal weight-bearing conditions. The projection is utilized to assess the joint under stress and better demonstrate structural and functional deformities.
Indications
This projection is utilized ...
Article
Ankle (weight-bearing lateral view)
The weight-bearing lateral view of the ankle is a specialized projection that places the joint under normal weight-bearing conditions. The projection is utilized to assess the joint under stress and better demonstrate structural and functional deformities.
Indications
This projection is util...
Article
Antipyretics
Antipyretics is the term given to medication that reduces a fever.
Commonly used antipyretics 1:
aspirin
acetaminophen
NSAIDs
However these agents are far from being side effect free, and research continues into safer body temperature-lowering agents 2.
Article
Thalamo-occipital distance
The thalamo-occipital distance is a marker of ventricular size in infants. It is defined as the distance between the most posterior surface of the thalamus at its junction with the choroid plexus and the outermost point of the occipital horn in the parasagittal plane 1.
See also
ventricular in...
Article
Anterior horn width
The anterior horn width is a marker of ventricular dilatation. It is predominantly used in prenatal and neonatal imaging to determine ventriculomegaly.
Measurement
The anterior horn width is the diagonal width of the anterior horn at its widest point in the coronal plane 1. In neonates, this i...