ESTIMATION OF SUBCARINAL ANGLE USING MINIMUM INTENSITY PROJECTION IN COMPUTED TOMOGRAPHY
DOI:
https://doi.org/10.22159/ajpcr.2018.v11i4.24041Keywords:
Subcarinal angle, Computed tomography, Minimum intensity projectionAbstract
 Objectives: The main objective of the study was to determine the normal subcarinal angle (SCA) in an adult patient, to compare the relationship of SCA with patient gender and age, and to correlate the SCA with body mass index (BMI).
Methods: A total of 193 subjects (109 males and 85 females) in the age group of 20–60 years scheduled for computed tomography thorax at the Department of Radiodiagnosis and Imaging, Kasturba Hospital, Manipal, were included in the study. Plain images were reconstructed into 1.4 mm reformatted image and processed into minimum intensity projection, and measurement was taken using angle tool. Mean and standard deviation was used to determine normal SCA, and independent t-test was used to compare the relationship of SCA with patient's age and gender. Pearson correlation†was used to correlate SCA with BMI.
Results- The mean SCA of the adult patient was 69.75±3.38°. The mean SCA in female was 69.90±4.07° and in male was 69.63±2.75°. In the age group of 20–40 years, the mean SCA was 70.38±3.85°, and in the age group of 41–60 years, it was 69.25±2.88°.
Conclusion: There was no relationship between SCA and patient's gender; however, the mean SCA of the age group 20–40 was found greater than that of 41–60 which was statistically significant. BMI has no significant correlation with SCA.
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References
Tamuli S, Kakati S, Das S, Singh KD, Ghosh SK. Comparative studies of efficacy and effects on oxidative stress of amlodipine and ramipril in the hypertensive patients of Northeast India. Int J Pharm Pharm Sci 2015;7:118-21.
World Health Organization. Respiratory Care in Primary Care Services: A Survey in 9 Countries. World Health Organization; 2004. Available from: http://www.apps.who.int/iris/bitstream/10665/83959/1/WHO_HTM_TB_2004.333.pdf. [Last accessed on 2017 Dec 18].
Tolba MK, Khashab KA, Said AS. The effect of dipeptidyl peptidase-4 inhibitors on cardiovascular disease risk in Type 2 diabetes mellitus. Int J Pharm Pharm Sci 2017;9:254-9.
Choorat S, Totanarungroj K, Muangman N. Assessment of normal subcarinal angle on chest radiographs in adult Thai population. Siriraj Med J 2008;60:264-6.
Lin SC, Lee JH, Hsieh CM. The correlation between subcarinal angle and left atrial volume. Acta Cardiol Sin 2012;28:332-6.
Murray JG, Brown AL, Anagnostou EA, Senior R. Widening of the tracheal bifurcation on chest radiographs: Value as a sign of left atrial enlargement. AJR Am J Roentgenol 1995;164:1089-92.
Perandini S, Faccioli N, Zaccarella A, Re T, Mucelli RP. The diagnostic contribution of CT volumetric rendering techniques in routine practice. Indian J Radiol Imag 2010;20:92-7.
BD Chaufas. Human Anatomy: Regional and Applied. 4th ed., Vol. 1. New Delhi (IND): CBS Publishers & Distributers; 2004.
Haskin PH, Goodman LR. Normal tracheal bifurcation angle: A reassessment. AJR Am J Roentgenol 1982;139:879-82.
Khade B, Waheed AR, Yadav N, Diwan CV. Study of sub carinal angle of human trachea by computerized tomography. Int J Anat Res 2016;4:2828-32.
Harris RS. Tracheal extension in respiration. Thorax 1959;14:201-10.
Mrudula C, Krishnaiah M. Study of brinchial tree. Int J Pharm BioSci 2011;2:166-72.
Alavi SM, Keats TE, O’Brien WM. The angle of tracheal bifurcation: Its normal mensuration. Am J Roentgenol Radium Ther Nucl Med 1970;108:546-9.
Chunder R, Guha R. A morphometric study of human subcarinal angle in different age groups in both sexes and its clinical implications. Indian J Basic and Appl Med Res 2015;4:424-30.
Karabulut N. CT assessment of tracheal carinal angle and its determinants. Br J Radiol 2005;78:787-90.
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