Abstract:
Background: The standard index for measurement of heart size is cardiothoracic ratio (CTR) that is measured based on chest radiograph. A small number of heart size assessments are performed using CT-scan. Aim: To evaluate the correlation between the radiographic and CT-scan measurement of CTR. Methods: The CXR and CT images were collected from the patients hospitalized in Imam Khomeini Hospital, Ahvaz, Iran. CTR was calculated by the ratio of the maximum transverse cardiac diameter to the largest transverse thoracic diameter in both CXR and CT-Scan (T, C) methods. Two methods were used to calculate CTR by CTscan. In second method, the long cardiac axis and the short axis were used to calculate CT-Scan (L, S). The correlation of age and CTR was also evaluated. Results: 122 patients with mean age of 54.89±18.53 years were studied. In all but 9 patients (92.62%), the values obtained from CT-Scan (T, C) were equal or smaller than CXR, and the difference in mean of CTR between two methods was 1.86% per patient. In all but 3 (97.54%) cases, the values obtained from CT-Scan (L, S) were equal or less than CXR, and the difference in mean of CTR between two methods was 0.14 per patient. Conclusion: The CTR values showed no significant difference between diagnostic values of CXR and CT-scan on assessment of increasing heart size. There was a significant positive correlation between CTR and age. Therefore, CTR can be a convenient way to measure the heart size.
Page(s):
394-397
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Medical and Health Sciences, Volume: 14, Issue: 1, Year: 2020
Keywords:
Computed tomography scan
,
Chest radiograph
,
Heart Size
,
Cardiothoracic Ratio