An aspect ratio greater than 1 is a malignant feature.

Aspect ratio mainly describes the mass of superficial organs. Common masses such as breast and thyroid gland refer to the front and back diameter in the longitudinal direction and the left and right diameter in the transverse direction. Aspect ratio refers to the ratio of anterior-posterior diameter to left-right diameter, which is one of the important basis for distinguishing benign from malignant tumors.

Aspect ratio less than 1 is a benign feature, greater than 1 is a malignant feature, and equal to 1 is a benign and malignant boundary feature. However, the ratio of height to width can only be used as a reference, and the diagnosis of benign and malignant masses needs comprehensive judgment, including the shape, boundary, internal echo, edge and blood flow of the masses.

Extended introduction

Generally speaking, the aspect ratio is greater than 1, that is, the vertical ratio is greater than or longer than the horizontal ratio, which is a mathematical ratio and has no meaning. You can divide the long diameter by the short diameter. Generally, the aspect ratio of thyroid nodules is greater than 1, and there are abundant blood flow signals or sand calcification inside, suggesting the possibility of malignant transformation. ?

A proportional value obtained by dividing the horizontal width of an object by its vertical height, or a proportional value obtained by dividing the vertical height of an object by its horizontal width.

A proportional value obtained by dividing the horizontal width of an object by its vertical height, or a proportional value obtained by dividing the vertical height of an object by its horizontal width. The aspect ratio, that is, the ratio of the width of an image divided by its height, is usually expressed as "x:y" or "x×y", where the colon and the cross mean "ratio" in Chinese.

At present, the most commonly used ratio in the film industry is the deformation ratio (2.39: 1). The traditional 4:3( 1.33: 1) is still used in many TV pictures, while its successful successor specification16: 9 (1.78:1) is used in European HDTV and digital TV.