2020年2月15日 · In the following situations, cardiothoracic ratio is more than 0.5 on a PA chest radiograph, but heart and pericardium are normal: a prominent epicardial fat pad; due to expiration; A low cardiothoracic ratio is usually presumed to be abnormal and is …

CTR, an indicator of large heart size, is a simple, cheap and widely used clinical measurement. In patients undergoing coronary angiography, CTR between 0.42 and 0.49 was associated with higher mortality than in patients with smaller hearts.

The CTR is frequently expressed as a percentage. A CTR of greater than 1:2 (50%) is considered abnormal. Accurate assessment of heart size assumes the projection is Posterior-Anterior (PA) and that cardiac size is not exaggerated by factors such as patient rotation.

2014年10月17日 · The cardiothoracic ratio (CTR) is a chest x-ray measurement (in a properly perform PA chest x-ray). It is defined as follows: maximum diameter of the heart / maximum diameter of the chest. A normal measurement should be less than 0.5. A number > 0.5 may suggest enlargement of the heart chamber size.

The cardiothoracic ratio (CTR), a comparison of the cardiac and thoracic diameters in CXR images, is a commonly used index that offers predictive information...

2018年1月1日 · A cardiothoracic ratio of more than 50% is considered abnormal in an adult; more than 66% in a neonate (1). The cardiac diameter itself can also be measured and, in normal individuals, is less than 15.5 cm in males, and less than 14.5 cm in females. A change in diameter of greater than 1.5 cm between two X-rays is significant.

2016年10月9日 · The cardiothoracic ratio (CTR), expressing the relationship between the size of the heart and the transverse dimension of the chest measured on a chest PA radiograph, is a commonly used parameter in the assessment of cardiomegaly with a cut-off value of 0.5. A value of >0.5 should be interpreted as enlargement of the heart.

Objective: To determine whether cardiothoracic ratio (CTR), within the range conventionally considered normal, predicted prognosis in patients undergoing coronary angiography. Design: Cohort study with a median of 7-years follow-up.

The cardiothoracic ratio (CTR), expressing the relationship between the size of the heart and the transverse dimension of the chest measured on a chest PA radiograph, is a...

According to a large-scale medical study, the average CTR measured from normal controls was 0.423 ± 0.040 while adults with congenital heart disease have significantly higher mean CTR of...