COMPUTED TOMOGRAPHIC MEASUREMENT OF THE MAIN PULMONARY ARTERY TO AORTIC DIAMETER RATIO IN HEALTHY DOGS: A COMPARISON TO ECHOCARDIOGRAPHICALLY DERIVED RATIOS

2016 ◽  
Vol 57 (4) ◽  
pp. 376-386 ◽  
Author(s):  
L. Abbigail Granger ◽  
Romain Pariaut ◽  
Jorge Vila ◽  
Cassaundra E Coulter ◽  
Nathalie Rademacher ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Main Pulmonary Artery ◽  
Diameter Ratio ◽  
Aortic Diameter ◽  
Computed Tomographic ◽  
Healthy Dogs ◽  
Tomographic Measurement

UTILIZING PULMONARY ARTERY/AORTIC DIAMETER RATIO FROM CT SCANS OF THE CHEST TO PREDICT PULMONARY ARTERY HYPERTENSION

CHEST Journal ◽  
2007 ◽  
Vol 132 (4) ◽  
pp. 624B
Author(s):  
Hans J. Lee ◽  
Barry Babchyck ◽  
Sophie Dedopoulos ◽  
Keith Guevera ◽  
Rakesh Shah ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Pulmonary Artery Hypertension ◽  
Diameter Ratio ◽  
Aortic Diameter ◽  
Ct Scans

scholarly journals Measurement of Main Pulmonary Artery Diameter and its Ratio with Ascending Aorta in Indian Population by Multi Detector Computed Tomography

2020 ◽  
Author(s):  
Jyoti Gangadhar Dulli ◽  
HM Chandrashekar ◽  
J Naveen ◽  
Maskal Revanna Srinivas ◽  
Shreyas G Rao ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Indian Population ◽  
Main Pulmonary Artery ◽  
Ascending Aorta ◽  
Diameter Ratio ◽  
P Value ◽  
Normal Range ◽  
Significant Difference ◽  
The Mean ◽  
Pulmonary Artery Diameter

Introduction: An increase in Pulmonary Artery (PA) pressure is associated with an increase in its diameter. Hence, it is necessary to know the normal range of Main Pulmonary Artery Diameter (MPAD). An attempt has been made to know the same among the Indian population. Aim: To determine the normal range of reference values for diameter of Main Pulmonary Artery (MPA) and its relation with Ascending Aorta (AA) in Indian population. Materials and Methods: A prospective cross-sectional study was conducted between October 2018 and September 2019 ((380 males, 120 females) between the age of 30-65 years). Data from the contrast CT scans of thorax of 500 subjects such as those patients with cough under evaluation, suspected lung nodule, chest wall lesions, primary or secondaries in the lung, etc., who visited the Department of Radio-diagnosis, in the Medical College of South India were analysed. Further, healthy population was also defined as those who were free from chronic cardiopulmonary illness in particular with regard to present study, which would affect the diameter of great vessels including that of PA and aorta. MPA and ascending aortic diameters were measured at the level of pulmonary artery bifurcation, viewed at fixed mediastinal window settings. Statistical Package for Social Sciences (SPSS) version 20, inferential statistics like Unpaired-t test were used to test the significant difference for variables between the two groups (males and females). The level of significance was set at 5%. Results: The MPADs of whole population ranged between 15.6-31.6 mm, with mean diameter of 23.08±2.81 mm. Correlation between age and MPAD was statistically significant (p-value <0.001), while sex-specific MPAD was not significant. The mean AA diameter was 27.15±2.6 mm. The mean AA diameter in males was 27.76±3.2 mm, and 26.67±2.0 mm in females with statistical significance (p-value 0.001) between the groups. The diameter ratio of MPA to AA was 0.85. Conclusion: In present study, the normal ranges of diameter of PA and its ratio with AA were defined among Indians. The diameter ratio of MPA to AA appears to be more important, as it tends to normalise the effects of anthropomorphic factors.

Main Pulmonary Artery–to–Ascending Aorta Diameter Ratio in Healthy Children on MDCT

2015 ◽  
Vol 205 (6) ◽  
pp. 1322-1325 ◽  
Author(s):  
Gregory L. Compton ◽  
Joshua Florence ◽  
Cathy MacDonald ◽  
Shi-Joon Yoo ◽  
Tilman Humpl ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Main Pulmonary Artery ◽  
Ascending Aorta ◽  
Diameter Ratio ◽  
Healthy Children ◽  
Aorta Diameter

Bubble study as a medium of contrast for computerized tomography coronary angiography. (Preprint)

2020 ◽  
Author(s):  
Vijay Shah ◽  
Justyn Huang
Keyword(s):  
Pulmonary Artery ◽  
Diagnostic Yield ◽  
Negative Contrast ◽  
Hounsfield Unit ◽  
Hounsfield Units ◽  
Computed Tomographic ◽  
Invasive Test ◽  
Clinical Difference ◽  
Contrast Ct ◽  
Scan Protocol

BACKGROUND Computed tomographic coronary angiogram (CTCA) is a non-invasive test with a negative predictive value of nearly 100% for the detection of coronary artery study. While diagnostic yield of a dedicated CTCA with bubble contrast is not yet evaluated OBJECTIVE To assess the diagnostic performance of injected bubble contrast and ability to measure difference in hounsfield units and use it as a "negative contrast" in computed tomographic METHODS This is a single center, single patient study. Baseline acquisition of a non-contrast CT scan was acquired to get hounsfield unit count in the aorta and pulmonary artery- (Calcium scan protocol) 1.4 mGy (19.5 mGy/cm). Secondly, Echo contrasts (Definity) - 5mls was injected and an echocardiogram confirmed filling in the aortic region. Finally, bubble contrast (1ml air, 8mls water and 1mls blood was drawn up and agitated through a 3 way tap) - was injected, a timing run was initiated to calculate for the bubbles to opacity the pulmonary artery. The same scan protocol was used– 1.4 mGy (19.5 mGy/cm). RESULTS Hounsfield units’ difference in the aorta and pulmonary artery from baseline compared to echo contrast and bubble contrast were not significant. CONCLUSIONS We believe this is the first ever recorded case to use bubbles as CT contrast. While results were not significant, secondary to small volume of bubbles injected. Further research needs to be implemented to assess clinical difference with amount of bubbles and volume required. CLINICALTRIAL Single centre study

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