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It is necessary to find an acoustic window, which is a gap between bony areas through which the ultrasound waves can be transmitted to visualise the deeper structures (5).
For further characterization of the mass and to limit the acoustic window, a transoesophageal echocardiogram was obtained.
At the lateral edge of the right cervical acoustic window, the gallbladder was observed between the hepatic lobes with thin walls that were hyperechoic to isoechoic, with anechoic content and posterior acoustic enhancement.
Exploratory operation presented that there is an aneurysm in the LV apex, instead of pseudoaneurysm (multiple prominent trabeculations in the apex and poor acoustic window provided a misleading echo picture of the situation) and several emboli were taken out from the aneurysm.
An echocardiogram confirmed an atrial septal defect (ASD) and suggested anomalous pulmonary venous drainage, but the pulmonary veins were incompletely visualised owing to acoustic window limitations.
Ultrasound-guided lumbar plexus block through the acoustic window of the lumbar ultrasound trident.
The researchers knew that some sounds get to the ears of a toothed whale through a structure called the acoustic window. Found on the lower jaw, this structure is very thin on the outside and has a large pad of fat on the inside.
Previous experiments and anatomical studies had found that sounds entered a toothed whale's head through a structure known as the acoustic window, an area of the lower jaw that's very thin on the outside with a large pad of fat on the inside.
Pleural effusions (1) and lung densities (2) can be readily imaged, particularly on the left, where the descending thoracic aorta acts as an efficient acoustic window. A previous case report (1) highlighted the value of surgical drainage of significant pleural effusions that are diagnosed intraoperatively.