Punctate echogenic foci are identified within a thyroid nodule. Identification of which additional imaging features would suggest the echogenic foci are colloid as opposed to microcalcifications?
ARTEFACT QUEUE DE COMET PROÉMINENT > 1 mm (reverberation artifact)
aspect fortement suggestif de hashimoto
micronodulaire : petit foyer hypoéchogène
caused by thyroid gland infiltration and destruction of thyroid follicles by lymphocytes and plasma cells.
An associated fibrotic reaction then creates the appearance of echogenic bands in the gland in more advanced disease
signe de Graves en echo
thyroid inferno
Hashimoto thyroiditis is associated with an increased incidence of what type of malignancy?
Non-Hodgkin thyroid lymphoma –/> hashimoto est un FDR majeur de lymphome (majorité patient avec lymphome thyroide ont un hashimoto)
signe de pneumportie en echo
pic bidirectionnel doppler spectrale
onde dans le doppelr veine sus hepatique corresponde a quoi
ASVD
A: FIN DIASTOLE du VD
S: debut systole
V: fin systole (pic signale l’ouverture valve tricuspide)
D : diastole
une seule onde hepatofuge dans veine sus hepatique tu penses à
INSUFISSANCE TRICUSPIDIENNE
If a sonographer changes from conventional to coded harmonics while performing a breast ultrasound, what is the likely effect on the image?
Decreased reverberation echoes in cysts
coded harmonics improves high frequency penetration while in large dense breasts suffers from the limitation of overall decreased penetration
Reversed diastolic flow bilaterally in both ICA. The right and left ICA waveforms show no change at all from the proximal ICA to the end of the ICA. cause ?
AUGMENTATION PRESSION INTRACRANIENNE
Neonatal connatal cysts found on head ultrasonography are most commonly found close to which portion of the ventricular system?
Connatal cysts are normal variants seen as a cystic area or areas, at the superolateral margins of the lateral ventricles, lateral to the frontal horns
Regarding intracranial vascular ultrasound used for evaluation of sickle cell patients. At what minimum middle cerebral artery peak systolic velocity is there concern for significant (>10%) increased risk for stroke (cm/sec)?
200
High peak systolic velocities (PSV) in the middle cerebral artery (MCA) are associated with an increased likelihood for the near future development of infarction in pediatric and adolescent sickle cell patients. Greater than 200 cm/sec flow in the MCA is considered high peak systolic velocity for such patients. Upon noting the high PSV, such patients undergo treatment including blood transfusions which have proven to help reduce infarctions in such vulnerable sickle cell patients .
artefact qui peut causer un pseudomasse dans l’aorte abdominal en echo
REVERBERATION
A pseudomass can sometimes be seen in the aorta. This is related to reverberation artifact caused by the ultrasound beam being mirrored on the posterior wall of the superior mesenteric artery. This occurs because of the ultrasound beam passes from low impedance blood in the SMA to high impedance fat between the SMA and aorta; the reverberated echo travels from the posterior wall of the SMA to the anterior wall back to the posterior wall and then back to the ultrasound transducer. The transducer thinks the echo is coming from a source further away since it takes longer time to come back and places an echogenic line within the aorta.
quelle age on peut caller lisencephalie type 1 en echo antenatal
the definitive diagnosis is generally made at 28-30 weeks or more due to the variability in the development of sulcation in the normal fetal brain
What is the best descriptor for ultrasound time gain compensation (TGC) response?
LINEAIRE
Time gain compensation (TGC) is a feature that reduces the impact of attenuation by tissues through increasing the intensity of the received signal in linear proportion to the depth.
