Comparison of helical and axial mode indirect computed tomographic venography in patients with pulmonary thromboembolism
Objective: To compare the helical and axial modes of indirect computed tomographic (CT) venography (CTV) for accuracy for diagnosing deep venous thrombosis (DVT) of the lower extremities as well as for their radiation burden in patients proven to have pulmonary thromboembolism (PTE) on CT pulmonary...
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2012-01-01
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| Series: | Lung India |
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| Online Access: | http://www.lungindia.com/article.asp?issn=0970-2113;year=2012;volume=29;issue=2;spage=131;epage=136;aulast=Kalra |
| _version_ | 1819084265574367232 |
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| author | Naveen Kalra Sameer Vyas Ashish Gupta Ashish Bhalla Sudha Suri Niranjan Khandelwal |
| author_facet | Naveen Kalra Sameer Vyas Ashish Gupta Ashish Bhalla Sudha Suri Niranjan Khandelwal |
| author_sort | Naveen Kalra |
| collection | DOAJ |
| description | Objective: To compare the helical and axial modes of indirect computed tomographic (CT) venography (CTV) for accuracy for diagnosing deep venous thrombosis (DVT) of the lower extremities as well as for their radiation burden in patients proven to have pulmonary thromboembolism (PTE) on CT pulmonary angiography (CTPA). Subjects and Methods: Of patients evaluated with CTPA for suspected acute PE, 20 of patients who were found to have PTE underwent both indirect CTV of the lower extremities and color Doppler examination. For indirect CTV, patients were randomly assigned to helical and axial modes. The CTV and Doppler findings were interpreted by two experienced radiologists who were blinded to the results of each other. Results: Out of total of 260 venous segments analyzed (130 venous segments each by helical or axial CTV), thrombi were seen in 43 venous segments (15 and 28 each by helical or axial CTV respectively). On comparison with Doppler, helical CTV had 82.35% sensitivity and 99.11% specificity, whereas axial CTV had 96.6% sensitivity and 100% specificity. The mean radiation dose was significantly higher for helical (1153.57 mgy.cm) as compared to axial mode CTV (806.28 mgy.cm) with P value of <0.0001. Conclusion: Axial CTV results in decreased radiation dose without significant change in the accuracy, as compared to helical CTV in the evaluation of DVT. |
| first_indexed | 2024-12-21T20:45:43Z |
| format | Article |
| id | doaj.art-8a7dc862e06e47e2beaa8c8690e00c3a |
| institution | Directory Open Access Journal |
| issn | 0970-2113 0974-598X |
| language | English |
| last_indexed | 2024-12-21T20:45:43Z |
| publishDate | 2012-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Lung India |
| spelling | doaj.art-8a7dc862e06e47e2beaa8c8690e00c3a2022-12-21T18:50:50ZengWolters Kluwer Medknow PublicationsLung India0970-21130974-598X2012-01-0129213113610.4103/0970-2113.95309Comparison of helical and axial mode indirect computed tomographic venography in patients with pulmonary thromboembolismNaveen KalraSameer VyasAshish GuptaAshish BhallaSudha SuriNiranjan KhandelwalObjective: To compare the helical and axial modes of indirect computed tomographic (CT) venography (CTV) for accuracy for diagnosing deep venous thrombosis (DVT) of the lower extremities as well as for their radiation burden in patients proven to have pulmonary thromboembolism (PTE) on CT pulmonary angiography (CTPA). Subjects and Methods: Of patients evaluated with CTPA for suspected acute PE, 20 of patients who were found to have PTE underwent both indirect CTV of the lower extremities and color Doppler examination. For indirect CTV, patients were randomly assigned to helical and axial modes. The CTV and Doppler findings were interpreted by two experienced radiologists who were blinded to the results of each other. Results: Out of total of 260 venous segments analyzed (130 venous segments each by helical or axial CTV), thrombi were seen in 43 venous segments (15 and 28 each by helical or axial CTV respectively). On comparison with Doppler, helical CTV had 82.35% sensitivity and 99.11% specificity, whereas axial CTV had 96.6% sensitivity and 100% specificity. The mean radiation dose was significantly higher for helical (1153.57 mgy.cm) as compared to axial mode CTV (806.28 mgy.cm) with P value of <0.0001. Conclusion: Axial CTV results in decreased radiation dose without significant change in the accuracy, as compared to helical CTV in the evaluation of DVT.http://www.lungindia.com/article.asp?issn=0970-2113;year=2012;volume=29;issue=2;spage=131;epage=136;aulast=KalraPulmonary embolismCTvenographydeep venous thrombosis |
| spellingShingle | Naveen Kalra Sameer Vyas Ashish Gupta Ashish Bhalla Sudha Suri Niranjan Khandelwal Comparison of helical and axial mode indirect computed tomographic venography in patients with pulmonary thromboembolism Lung India Pulmonary embolism CT venography deep venous thrombosis |
| title | Comparison of helical and axial mode indirect computed tomographic venography in patients with pulmonary thromboembolism |
| title_full | Comparison of helical and axial mode indirect computed tomographic venography in patients with pulmonary thromboembolism |
| title_fullStr | Comparison of helical and axial mode indirect computed tomographic venography in patients with pulmonary thromboembolism |
| title_full_unstemmed | Comparison of helical and axial mode indirect computed tomographic venography in patients with pulmonary thromboembolism |
| title_short | Comparison of helical and axial mode indirect computed tomographic venography in patients with pulmonary thromboembolism |
| title_sort | comparison of helical and axial mode indirect computed tomographic venography in patients with pulmonary thromboembolism |
| topic | Pulmonary embolism CT venography deep venous thrombosis |
| url | http://www.lungindia.com/article.asp?issn=0970-2113;year=2012;volume=29;issue=2;spage=131;epage=136;aulast=Kalra |
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