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Claudia I Henschke - One of the best experts on this subject based on the ideXlab platform.
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thromboembolic disease detection at indirect ct venography versus ct Pulmonary Angiography
Radiology, 2005Co-Authors: Matthew D Cham, David F Yankelevitz, Claudia I HenschkeAbstract:PURPOSE: To assess the incremental increase in thromboembolic disease detection at indirect computed tomographic (CT) venography versus CT Pulmonary Angiography and to determine the importance of scan interval for indirect CT venography on the basis of thrombus length. MATERIALS AND METHODS: Institutional review board approval was obtained, and informed consent was not required. The study included 1590 consecutive patients undergoing CT Pulmonary Angiography for the suspicion of Pulmonary embolism. Two minutes after completion of Pulmonary Angiography, a contiguous indirect CT venography was performed from the iliac crest to the popliteal fossa. The presence of Pulmonary embolism or deep venous thrombosis (DVT) was recorded for all patients. The lengths of all deep venous thrombi found in the first 378 consecutive patients were recorded. RESULTS: Pulmonary embolism was detected in 243 (15%) of 1590 patients at CT Pulmonary Angiography, and DVT was detected in 148 (9%) patients at indirect CT venography. Among 148 patients with DVT, Pulmonary embolism was detected in 100 patients at CT Pulmonary Angiography. Thus, the addition of indirect CT venography to CT Pulmonary Angiography resulted in a 20% incremental increase in thromboembolic disease detection compared with that at CT Pulmonary Angiography alone (99% confidence interval: 17%, 23%). Among the 378 patients, DVT was present in 33 patients at indirect CT venography. Two (6%) of 33 patients had clots measuring 2 cm or less, six (18%) had clots measuring 3-4 cm, and 25 (76%) had clots measuring more than 4 cm in length. CONCLUSION: The addition of indirect CT venography to CT Pulmonary Angiography incrementally increases the detection rate of thromboembolic disease by 20%. Performance of indirect CT venography by using contiguous section intervals, with a section width of 1 cm, is recommended to accurately detect DVT.
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Thromboembolic disease detection at indirect CT venography versus CT Pulmonary Angiography.
Radiology, 2005Co-Authors: Matthew D Cham, David F Yankelevitz, Claudia I HenschkeAbstract:PURPOSE: To assess the incremental increase in thromboembolic disease detection at indirect computed tomographic (CT) venography versus CT Pulmonary Angiography and to determine the importance of scan interval for indirect CT venography on the basis of thrombus length. MATERIALS AND METHODS: Institutional review board approval was obtained, and informed consent was not required. The study included 1590 consecutive patients undergoing CT Pulmonary Angiography for the suspicion of Pulmonary embolism. Two minutes after completion of Pulmonary Angiography, a contiguous indirect CT venography was performed from the iliac crest to the popliteal fossa. The presence of Pulmonary embolism or deep venous thrombosis (DVT) was recorded for all patients. The lengths of all deep venous thrombi found in the first 378 consecutive patients were recorded. RESULTS: Pulmonary embolism was detected in 243 (15%) of 1590 patients at CT Pulmonary Angiography, and DVT was detected in 148 (9%) patients at indirect CT venography. A...
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Optimization of combined CT Pulmonary Angiography with lower extremity CT venography.
AJR. American journal of roentgenology, 2000Co-Authors: David F Yankelevitz, Matthew D Cham, Gordon Gamsu, Ami A. Shah, Jürgen Rademaker, Dorith Shaham, Natasha Buckshee, Claudia I HenschkeAbstract:OBJECTIVE. We wanted to determine the time delay for maximum enhancement of the deep venous system of the lower extremities after standard CT Pulmonary Angiography.SUBJECTS AND METHODS. In 20 patients who had undergone standard CT Pulmonary Angiography, we measured arterial and venous enhancement at the level of the greater trochanter. These measurements were obtained at 30-sec intervals immediately after completion of CT Pulmonary Angiography. Ten measurements were obtained in 5 min. Time—density curves were plotted.RESULTS. We found that the median and average peak venous enhancements were 92 and 95 H, respectively. Time to peak enhancement was variable. Because of the broad shape of the venous time—density curve, near peak enhancement could be achieved in most patients at 2 min after CT Pulmonary Angiography.CONCLUSION. CT of the deep venous system of the lower extremities after standard CT Pulmonary Angiography, performed with appropriate timing considerations, allows near maximal enhancement of the v...
Matthew D Cham - One of the best experts on this subject based on the ideXlab platform.
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thromboembolic disease detection at indirect ct venography versus ct Pulmonary Angiography
Radiology, 2005Co-Authors: Matthew D Cham, David F Yankelevitz, Claudia I HenschkeAbstract:PURPOSE: To assess the incremental increase in thromboembolic disease detection at indirect computed tomographic (CT) venography versus CT Pulmonary Angiography and to determine the importance of scan interval for indirect CT venography on the basis of thrombus length. MATERIALS AND METHODS: Institutional review board approval was obtained, and informed consent was not required. The study included 1590 consecutive patients undergoing CT Pulmonary Angiography for the suspicion of Pulmonary embolism. Two minutes after completion of Pulmonary Angiography, a contiguous indirect CT venography was performed from the iliac crest to the popliteal fossa. The presence of Pulmonary embolism or deep venous thrombosis (DVT) was recorded for all patients. The lengths of all deep venous thrombi found in the first 378 consecutive patients were recorded. RESULTS: Pulmonary embolism was detected in 243 (15%) of 1590 patients at CT Pulmonary Angiography, and DVT was detected in 148 (9%) patients at indirect CT venography. Among 148 patients with DVT, Pulmonary embolism was detected in 100 patients at CT Pulmonary Angiography. Thus, the addition of indirect CT venography to CT Pulmonary Angiography resulted in a 20% incremental increase in thromboembolic disease detection compared with that at CT Pulmonary Angiography alone (99% confidence interval: 17%, 23%). Among the 378 patients, DVT was present in 33 patients at indirect CT venography. Two (6%) of 33 patients had clots measuring 2 cm or less, six (18%) had clots measuring 3-4 cm, and 25 (76%) had clots measuring more than 4 cm in length. CONCLUSION: The addition of indirect CT venography to CT Pulmonary Angiography incrementally increases the detection rate of thromboembolic disease by 20%. Performance of indirect CT venography by using contiguous section intervals, with a section width of 1 cm, is recommended to accurately detect DVT.
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Thromboembolic disease detection at indirect CT venography versus CT Pulmonary Angiography.
Radiology, 2005Co-Authors: Matthew D Cham, David F Yankelevitz, Claudia I HenschkeAbstract:PURPOSE: To assess the incremental increase in thromboembolic disease detection at indirect computed tomographic (CT) venography versus CT Pulmonary Angiography and to determine the importance of scan interval for indirect CT venography on the basis of thrombus length. MATERIALS AND METHODS: Institutional review board approval was obtained, and informed consent was not required. The study included 1590 consecutive patients undergoing CT Pulmonary Angiography for the suspicion of Pulmonary embolism. Two minutes after completion of Pulmonary Angiography, a contiguous indirect CT venography was performed from the iliac crest to the popliteal fossa. The presence of Pulmonary embolism or deep venous thrombosis (DVT) was recorded for all patients. The lengths of all deep venous thrombi found in the first 378 consecutive patients were recorded. RESULTS: Pulmonary embolism was detected in 243 (15%) of 1590 patients at CT Pulmonary Angiography, and DVT was detected in 148 (9%) patients at indirect CT venography. A...
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Optimization of combined CT Pulmonary Angiography with lower extremity CT venography.
AJR. American journal of roentgenology, 2000Co-Authors: David F Yankelevitz, Matthew D Cham, Gordon Gamsu, Ami A. Shah, Jürgen Rademaker, Dorith Shaham, Natasha Buckshee, Claudia I HenschkeAbstract:OBJECTIVE. We wanted to determine the time delay for maximum enhancement of the deep venous system of the lower extremities after standard CT Pulmonary Angiography.SUBJECTS AND METHODS. In 20 patients who had undergone standard CT Pulmonary Angiography, we measured arterial and venous enhancement at the level of the greater trochanter. These measurements were obtained at 30-sec intervals immediately after completion of CT Pulmonary Angiography. Ten measurements were obtained in 5 min. Time—density curves were plotted.RESULTS. We found that the median and average peak venous enhancements were 92 and 95 H, respectively. Time to peak enhancement was variable. Because of the broad shape of the venous time—density curve, near peak enhancement could be achieved in most patients at 2 min after CT Pulmonary Angiography.CONCLUSION. CT of the deep venous system of the lower extremities after standard CT Pulmonary Angiography, performed with appropriate timing considerations, allows near maximal enhancement of the v...
David F Yankelevitz - One of the best experts on this subject based on the ideXlab platform.
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thromboembolic disease detection at indirect ct venography versus ct Pulmonary Angiography
Radiology, 2005Co-Authors: Matthew D Cham, David F Yankelevitz, Claudia I HenschkeAbstract:PURPOSE: To assess the incremental increase in thromboembolic disease detection at indirect computed tomographic (CT) venography versus CT Pulmonary Angiography and to determine the importance of scan interval for indirect CT venography on the basis of thrombus length. MATERIALS AND METHODS: Institutional review board approval was obtained, and informed consent was not required. The study included 1590 consecutive patients undergoing CT Pulmonary Angiography for the suspicion of Pulmonary embolism. Two minutes after completion of Pulmonary Angiography, a contiguous indirect CT venography was performed from the iliac crest to the popliteal fossa. The presence of Pulmonary embolism or deep venous thrombosis (DVT) was recorded for all patients. The lengths of all deep venous thrombi found in the first 378 consecutive patients were recorded. RESULTS: Pulmonary embolism was detected in 243 (15%) of 1590 patients at CT Pulmonary Angiography, and DVT was detected in 148 (9%) patients at indirect CT venography. Among 148 patients with DVT, Pulmonary embolism was detected in 100 patients at CT Pulmonary Angiography. Thus, the addition of indirect CT venography to CT Pulmonary Angiography resulted in a 20% incremental increase in thromboembolic disease detection compared with that at CT Pulmonary Angiography alone (99% confidence interval: 17%, 23%). Among the 378 patients, DVT was present in 33 patients at indirect CT venography. Two (6%) of 33 patients had clots measuring 2 cm or less, six (18%) had clots measuring 3-4 cm, and 25 (76%) had clots measuring more than 4 cm in length. CONCLUSION: The addition of indirect CT venography to CT Pulmonary Angiography incrementally increases the detection rate of thromboembolic disease by 20%. Performance of indirect CT venography by using contiguous section intervals, with a section width of 1 cm, is recommended to accurately detect DVT.
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Thromboembolic disease detection at indirect CT venography versus CT Pulmonary Angiography.
Radiology, 2005Co-Authors: Matthew D Cham, David F Yankelevitz, Claudia I HenschkeAbstract:PURPOSE: To assess the incremental increase in thromboembolic disease detection at indirect computed tomographic (CT) venography versus CT Pulmonary Angiography and to determine the importance of scan interval for indirect CT venography on the basis of thrombus length. MATERIALS AND METHODS: Institutional review board approval was obtained, and informed consent was not required. The study included 1590 consecutive patients undergoing CT Pulmonary Angiography for the suspicion of Pulmonary embolism. Two minutes after completion of Pulmonary Angiography, a contiguous indirect CT venography was performed from the iliac crest to the popliteal fossa. The presence of Pulmonary embolism or deep venous thrombosis (DVT) was recorded for all patients. The lengths of all deep venous thrombi found in the first 378 consecutive patients were recorded. RESULTS: Pulmonary embolism was detected in 243 (15%) of 1590 patients at CT Pulmonary Angiography, and DVT was detected in 148 (9%) patients at indirect CT venography. A...
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Optimization of combined CT Pulmonary Angiography with lower extremity CT venography.
AJR. American journal of roentgenology, 2000Co-Authors: David F Yankelevitz, Matthew D Cham, Gordon Gamsu, Ami A. Shah, Jürgen Rademaker, Dorith Shaham, Natasha Buckshee, Claudia I HenschkeAbstract:OBJECTIVE. We wanted to determine the time delay for maximum enhancement of the deep venous system of the lower extremities after standard CT Pulmonary Angiography.SUBJECTS AND METHODS. In 20 patients who had undergone standard CT Pulmonary Angiography, we measured arterial and venous enhancement at the level of the greater trochanter. These measurements were obtained at 30-sec intervals immediately after completion of CT Pulmonary Angiography. Ten measurements were obtained in 5 min. Time—density curves were plotted.RESULTS. We found that the median and average peak venous enhancements were 92 and 95 H, respectively. Time to peak enhancement was variable. Because of the broad shape of the venous time—density curve, near peak enhancement could be achieved in most patients at 2 min after CT Pulmonary Angiography.CONCLUSION. CT of the deep venous system of the lower extremities after standard CT Pulmonary Angiography, performed with appropriate timing considerations, allows near maximal enhancement of the v...
Jeffrey L Jackson - One of the best experts on this subject based on the ideXlab platform.
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meta analysis outcomes in patients with suspected Pulmonary embolism managed with computed tomographic Pulmonary Angiography
Annals of Internal Medicine, 2004Co-Authors: Lisa K Moores, William L Jackson, Andrew F Shorr, Jeffrey L JacksonAbstract:Patients with suspected Pulmonary embolism seldom have subsequent venous thromboembolism after negative results on computed tomographic Pulmonary Angiography (CTPA). Withholding anticoagulation aft...
Carl Chartrand-lefebvre - One of the best experts on this subject based on the ideXlab platform.
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Yield of CT Pulmonary Angiography in the diagnosis of acute Pulmonary embolism: short report.
BMC research notes, 2019Co-Authors: Zhongyi Chen, Simon Deblois, Kevin Toporowicz, Irina Boldeanu, Marie-odile Francoeur, Manel Sadouni, Luigi Lepanto, Carl Chartrand-lefebvreAbstract:Objective To assess computed tomography Pulmonary Angiography (CTPA) positive yield rate for Pulmonary embolism (PE) in a Canadian academic tertiary center.
