Venetian Blind Artefact

Rain shower 2 appearance is a sonographic finding that is typically associated with adenomyosis but can also occur in uterine fibroids the venetian blind appearance associated with adenomyosis is typically thin whereas when associated with uterine fibroids there are also edge shadows or dense posterior shadowing from calcification 1.

Venetian blind artefact.

It represents overlap between adjacent slabs that are acquired as separate acquisitions and then fused together. Motsa is an useful technique for the evaluation of vertebrobasilar ischemia and aneurysm scanning from the foramen magnum through the circle of willis. Ultrasound features of adenomyosis including asymmetrical uterine wall thickening anteriorly with focal heterogeneity and associated increased blood flow as well as the venetian blind pattern of acoustic shadowing the latter may be seen with either adenomyosis or uterine fibroids. A term of art referring to the parallel ridging cracking and separation of pathology specimens cut with a microtome due to tissue brittleness which may occur with alcohol fixation.

The venetian blinds artifact is an uncommon tissue cutting artifact that leads to the formation of parallel series of strips of tissue separated by narrow clear spaces that resemble venetian blinds. Artefacts of embedding entrapment of air around the tissue is a common finding during embedding. Venetian blind shadowing is a type of posterior acoustic artifact described as bands of linear shadows along lines of sight often diverging on a convex probe. The summary below examines the most common microtomy artifacts that can be seen under the microscope when viewing stained tissue sections.

Venetian blind artifact from motsa because each motsa slab is acquired at separate times exact registration of position and signal intensity of adjacent slabs may not be possible. This causes the tissue to fall out or vibrate during the cutting procedure leading to venetian blind artifact which appears as zones of compressed tissue separated by open spaces. Some types of tissue are more prone to certain kinds of artifacts. The slabs typically overlap 25 40 to minimize the venetian blind artifact venetian blind artifact due to minimal saturation effects.

This gives rise to the so called venetian blind artifacts shown in the image left. Hydrophilic processing fluids may be retained within the embedded. Venetian blind artifact 3d mra only this is a specific artifact seen only with the motsa multiple overlapping thin slab acquisition technique. This artifact has been attributed to vibration of the specimen in the paraffin block caused either by excessive hardening of the tissue in.