Ultra Low Dose CT Pulmonary Angiography with Iterative Reconstruction.
OBJECTIVE:Evaluation of a new iterative reconstruction algorithm (IMR) for detection/rule-out of pulmonary embolism (PE) in ultra-low dose computed tomography pulmonary angiography (CTPA). METHODS:Lower dose CT data sets were simulated based on CTPA examinations of 16 patients with pulmonary embolis...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2016-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC5017721?pdf=render |
| _version_ | 1828874962475155456 |
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| author | Andreas Sauter Thomas Koehler Alexander A Fingerle Bernhard Brendel Vivien Richter Michael Rasper Ernst J Rummeny Peter B Noël Daniela Münzel |
| author_facet | Andreas Sauter Thomas Koehler Alexander A Fingerle Bernhard Brendel Vivien Richter Michael Rasper Ernst J Rummeny Peter B Noël Daniela Münzel |
| author_sort | Andreas Sauter |
| collection | DOAJ |
| description | OBJECTIVE:Evaluation of a new iterative reconstruction algorithm (IMR) for detection/rule-out of pulmonary embolism (PE) in ultra-low dose computed tomography pulmonary angiography (CTPA). METHODS:Lower dose CT data sets were simulated based on CTPA examinations of 16 patients with pulmonary embolism (PE) with dose levels (DL) of 50%, 25%, 12.5%, 6.3% or 3.1% of the original tube current setting. Original CT data sets and simulated low-dose data sets were reconstructed with three reconstruction algorithms: the standard reconstruction algorithm "filtered back projection" (FBP), the first generation iterative reconstruction algorithm iDose and the next generation iterative reconstruction algorithm "Iterative Model Reconstruction" (IMR). In total, 288 CTPA data sets (16 patients, 6 tube current levels, 3 different algorithms) were evaluated by two blinded radiologists regarding image quality, diagnostic confidence, detectability of PE and contrast-to-noise ratio (CNR). RESULTS:iDose and IMR showed better detectability of PE than FBP. With IMR, sensitivity for detection of PE was 100% down to a dose level of 12.5%. iDose and IMR showed superiority to FBP regarding all characteristics of subjective (diagnostic confidence in detection of PE, image quality, image noise, artefacts) and objective image quality. The minimum DL providing acceptable diagnostic performance was 12.5% (= 0.45 mSv) for IMR, 25% (= 0.89 mSv) for iDose and 100% (= 3.57 mSv) for FBP. CNR was significantly (p < 0.001) improved by IMR compared to FBP and iDose at all dose levels. CONCLUSION:By using IMR for detection of PE, dose reduction for CTPA of up to 75% is possible while maintaining full diagnostic confidence. This would result in a mean effective dose of approximately 0.9 mSv for CTPA. |
| first_indexed | 2024-12-13T07:49:12Z |
| format | Article |
| id | doaj.art-f992c3ff1267454c89792d547e0bf390 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-13T07:49:12Z |
| publishDate | 2016-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-f992c3ff1267454c89792d547e0bf3902022-12-21T23:54:45ZengPublic Library of Science (PLoS)PLoS ONE1932-62032016-01-01119e016271610.1371/journal.pone.0162716Ultra Low Dose CT Pulmonary Angiography with Iterative Reconstruction.Andreas SauterThomas KoehlerAlexander A FingerleBernhard BrendelVivien RichterMichael RasperErnst J RummenyPeter B NoëlDaniela MünzelOBJECTIVE:Evaluation of a new iterative reconstruction algorithm (IMR) for detection/rule-out of pulmonary embolism (PE) in ultra-low dose computed tomography pulmonary angiography (CTPA). METHODS:Lower dose CT data sets were simulated based on CTPA examinations of 16 patients with pulmonary embolism (PE) with dose levels (DL) of 50%, 25%, 12.5%, 6.3% or 3.1% of the original tube current setting. Original CT data sets and simulated low-dose data sets were reconstructed with three reconstruction algorithms: the standard reconstruction algorithm "filtered back projection" (FBP), the first generation iterative reconstruction algorithm iDose and the next generation iterative reconstruction algorithm "Iterative Model Reconstruction" (IMR). In total, 288 CTPA data sets (16 patients, 6 tube current levels, 3 different algorithms) were evaluated by two blinded radiologists regarding image quality, diagnostic confidence, detectability of PE and contrast-to-noise ratio (CNR). RESULTS:iDose and IMR showed better detectability of PE than FBP. With IMR, sensitivity for detection of PE was 100% down to a dose level of 12.5%. iDose and IMR showed superiority to FBP regarding all characteristics of subjective (diagnostic confidence in detection of PE, image quality, image noise, artefacts) and objective image quality. The minimum DL providing acceptable diagnostic performance was 12.5% (= 0.45 mSv) for IMR, 25% (= 0.89 mSv) for iDose and 100% (= 3.57 mSv) for FBP. CNR was significantly (p < 0.001) improved by IMR compared to FBP and iDose at all dose levels. CONCLUSION:By using IMR for detection of PE, dose reduction for CTPA of up to 75% is possible while maintaining full diagnostic confidence. This would result in a mean effective dose of approximately 0.9 mSv for CTPA.http://europepmc.org/articles/PMC5017721?pdf=render |
| spellingShingle | Andreas Sauter Thomas Koehler Alexander A Fingerle Bernhard Brendel Vivien Richter Michael Rasper Ernst J Rummeny Peter B Noël Daniela Münzel Ultra Low Dose CT Pulmonary Angiography with Iterative Reconstruction. PLoS ONE |
| title | Ultra Low Dose CT Pulmonary Angiography with Iterative Reconstruction. |
| title_full | Ultra Low Dose CT Pulmonary Angiography with Iterative Reconstruction. |
| title_fullStr | Ultra Low Dose CT Pulmonary Angiography with Iterative Reconstruction. |
| title_full_unstemmed | Ultra Low Dose CT Pulmonary Angiography with Iterative Reconstruction. |
| title_short | Ultra Low Dose CT Pulmonary Angiography with Iterative Reconstruction. |
| title_sort | ultra low dose ct pulmonary angiography with iterative reconstruction |
| url | http://europepmc.org/articles/PMC5017721?pdf=render |
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