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Cour A, Burel J, Garnier M, Durand E, Demeyere M, Dacher JN. CT annulus sizing prior to transcatheter aortic valve replacement (TAVR): evaluation of free-breathing versus breath-holding acquisition. Eur Radiol 2023; 33:8521-8527. [PMID: 37470824 DOI: 10.1007/s00330-023-09913-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/07/2023] [Accepted: 05/14/2023] [Indexed: 07/21/2023]
Abstract
OBJECTIVES To assess feasibility and accuracy of aortic annulus measurements using cardiac computed tomography angiography (CTA) performed during free-breathing prior to transcatheter aortic valve replacement (TAVR). MATERIALS AND METHODS Sixty consecutive TAVR candidates underwent free-breathing wide-detector cardiac CTA, followed by a percutaneous valve replacement. For each, a theoretical valve size was suggested through CT measurements of the annulus, then compared to the size of the actual implanted transcatheter heart valve (THV). The procedural success and the 30-day outcomes were collected. Image quality of the annulus was also studied according to subjective and objective criteria. Data of a control group of 60 patients previously evaluated on breath-holding were also evaluated. RESULTS A total of 120 patients (mean age, 83 years ± 7, 60 men) were evaluated. All CT acquisitions provided sufficient image quality allowing precise annulus measurements. Mean attenuation (p < 0.001) and image noise (p = 0.01) were higher in the free-breathing group, while image quality was comparable (p = 0.36). The agreement rate between CT-suggested valve size and THV implanted size was comparable, estimated at 87% (κ = 0.79, 95%CI 0.566, 0.908) on free-breathing vs. 82% (κ = 0.78, 95%CI 0.634, 0.904) on breath-holding. The procedure was successful for all patients without increase in 30-day mortality or adverse events. CONCLUSIONS Free-breathing cardiac CTA allows accurate aortic annulus measurements without compromising image quality or patients' outcome after TAVR. Elderly patients experiencing dyspnea, discomfort, or hearing loss that could prevent proper breath-holding should not be excluded from CT prior to TAVR. CLINICAL RELEVANCE STATEMENT To decrease elderly patients' discomfort, MDCT evaluation prior to transcatheter aortic valve replacement (TAVR) may be performed on quiet breathing with no significant impact on the outcome. KEY POINTS • Adhering to CT breathing commands can be challenging for patients with dyspnea, hearing impairment, agitation, or pulmonary diseases. • Free-breathing cardiac CT may be an alternative to breath-holding for patients unable to follow the breathing commands. • Wide-detector CT acquisition on free-breathing does not impair annulus measurements and prosthesis sizing in patients scheduled for TAVR.
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Affiliation(s)
- Adrien Cour
- Department of Radiology, Cardiac Imaging Unit, Rouen University Hospital, 37 Boulevard Gambetta, F-76000, Rouen, France
| | - Julien Burel
- Department of Radiology, Cardiac Imaging Unit, Rouen University Hospital, 37 Boulevard Gambetta, F-76000, Rouen, France
| | - Matthieu Garnier
- Department of Radiology, Cardiac Imaging Unit, Rouen University Hospital, 37 Boulevard Gambetta, F-76000, Rouen, France
| | - Eric Durand
- Department of Cardiology, CHU Rouen, 37 Boulevard Gambetta, F-76000, Rouen, France
- Normandie Univ, UNIROUEN INSERM U1096, F-76000, Rouen, France
| | - Matthieu Demeyere
- Department of Radiology, Cardiac Imaging Unit, Rouen University Hospital, 37 Boulevard Gambetta, F-76000, Rouen, France
| | - Jean-Nicolas Dacher
- Department of Radiology, Cardiac Imaging Unit, Rouen University Hospital, 37 Boulevard Gambetta, F-76000, Rouen, France.
- Normandie Univ, UNIROUEN INSERM U1096, F-76000, Rouen, France.
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Application of Esmolol to Control Heart Rate and Artificial Intelligence Reconstruction Analysis for Rapid Zero-Cooperation Emergency Coronary CTA. JOURNAL OF HEALTHCARE ENGINEERING 2022; 2022:7363589. [PMID: 35256901 PMCID: PMC8898108 DOI: 10.1155/2022/7363589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/17/2021] [Accepted: 12/28/2021] [Indexed: 11/30/2022]
Abstract
Objective To investigate a rapid and effective method for the examination of coronary CTA in emergency patients requiring coronary CTA examination, who have faster heart rate (≧80 bpm) or cannot cooperate with the examination due to the inability of breath holding at poor physical conditions. Methods Before coronary CTA examination, with the ECG monitoring, intravenous injection of esmolol was given to achieve rapid heart rate reduction. Without the patient's cooperation, coronary CTA examination was then performed in a quick and effective manner using the 640-slice high-speed CT. The diagnosis report was obtained through the subsequent reconstruction analysis using artificial intelligence software. Conclusion Esmolol injection can rapidly reduce the heart rate of normal people during exercise and at rest, and the steady blood concentration can be reached in 2 minutes. The half-life is about 5 minutes, with short duration and fewer side effects on patients. The diagnostic rate of coronary artery segment using (excellent + good) CTA image of the patients with esmolol and artificial intelligence analysis in the experimental group was 95.4%, while the diagnostic rate was 91.1% in the control group, and there was no significant statistical difference between the two groups (P > 0.05). Esmolol injection can rapidly reduce heart rate in patients with high heart rate, without holding breath or long-term preoperative preparation; the combination with the analysis of subsequent artificial intelligence reconstruction is a new method for rapid and effective coronary CTA examination in all patients.
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Shen W, Chen Y, Qian W, Liu W, Zhu Y, Xu Y, Zhu X. Impact of respiratory motion artifact on coronary image quality of one beat coronary CT angiography. JOURNAL OF X-RAY SCIENCE AND TECHNOLOGY 2021; 29:287-296. [PMID: 33554935 DOI: 10.3233/xst-200812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
BACKGROUND Accuracy of CT-derived fractional flow reserve depends on good image quality. Thus, improving image quality during coronary CT angiography (CCTA) is important. OBJECTIVE To investigate impact of respiratory motion artifact on coronary image quality focusing on vessel diameter and territory during one beat CCTA by a 256-row detector. METHODS We retrospectively reviewed patients who underwent CCTA under free-breathing (n = 100) and breath-holding (n = 100), respectively. Coronary image quality is defined as 4-1 from excellent to poor (non-diagnostic) and respiratory motion artifact severity is also scored on a 4-point scale from no artifact to severe artifact. Coronary image quality and respiratory motion artifact severity of all images were evaluated by two radiologists independently. RESULTS Compared with free-breathing group, the image qualities are significantly higher in per-segment, per-vessel and per-patient levels (P < 0.001) and proportion of segments with excellent image quality also improves significantly (73.6% vs 60.1%, P < 0.001) in breath-holding group. The image quality improvement occurs in medium-sized coronary arterial segments. Coronary image quality improves with respiratory motion artifacts decreasing in both groups, respectively. CONCLUSION During one heartbeat CCTA, breath-holding is still recommended to improve coronary image quality due to improvement of the image quality in the medium-sized coronary arteries.
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Affiliation(s)
- Wenting Shen
- Department of Radiology, the First Affiliated Hospital of Nanjing Medical University, Guangzhou Road, Nanjing, Jiangsu, China
- Department of Radiology, Liyang people's hospital, Jianshe West Road, Liyang, Jiangsu, China
| | - Yang Chen
- Department of Radiology, the First Affiliated Hospital of Nanjing Medical University, Guangzhou Road, Nanjing, Jiangsu, China
| | - Wen Qian
- Department of Radiology, the First Affiliated Hospital of Nanjing Medical University, Guangzhou Road, Nanjing, Jiangsu, China
| | - Wangyan Liu
- Department of Radiology, the First Affiliated Hospital of Nanjing Medical University, Guangzhou Road, Nanjing, Jiangsu, China
| | - Yinsu Zhu
- Department of Radiology, the First Affiliated Hospital of Nanjing Medical University, Guangzhou Road, Nanjing, Jiangsu, China
| | - Yi Xu
- Department of Radiology, the First Affiliated Hospital of Nanjing Medical University, Guangzhou Road, Nanjing, Jiangsu, China
| | - Xiaomei Zhu
- Department of Radiology, the First Affiliated Hospital of Nanjing Medical University, Guangzhou Road, Nanjing, Jiangsu, China
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Zhao Y, Li D, Liu Z, Geng X, Zhang T, Xu Y. Comparison of image quality and radiation dose using different pre-ASiR-V and post-ASiR-V levels in coronary computed tomography angiography. JOURNAL OF X-RAY SCIENCE AND TECHNOLOGY 2021; 29:125-134. [PMID: 33164983 DOI: 10.3233/xst-200754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
OBJECTIVE To determine the optimal pre-adaptive and post-adaptive level statistical iterative reconstruction V (ASiR-V) for improving image quality and reducing radiation dose in coronary computed tomography angiography (CCTA). METHODS The study was divided into two parts. In part I, 150 patients for CCTA were prospectively enrolled and randomly divided into 5 groups (A, B, C, D, and E) with progressive scanning from 40% to 80% pre-ASiR-V with 10% intervals and reconstructing with 70% post-ASiR-V. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were calculated. Subjective image quality was assessed using a 5-point scale. The CT dose index volume (CTDIvol) and dose-length product (DLP) of each patient were recorded and the effective radiation dose (ED) was calculated after statistical analysis by optimizing for the best pre-ASiR-V value with the lowest radiation dose while maintaining overall image quality. In part II, the images were reconstructed with the recommended optimal pre-ASiR-V values in part I (D group) and 40%-90% of post-ASiR-V. The reconstruction group (D group) was divided into 6 subgroups (interval 10%, D0:40% post-ASiR-V, D1:50% post - ASiR-V, D2:60% post-ASiR-V, D3:70% post-ASiR-V, D4:80% post-ASiR-V, and D5:90% post-ASiR-V).The SNR and CNR of D0-D5 subgroups were calculated and analyzed using one-way analysis of variance, and the consistency of the subjective scores used the k test. RESULTS There was no significant difference in the SNRs, CNRs, and image quality scores among A, B, C, and D groups (P > 0.05). The SNR, CNR, and image quality scores of the E group were lower than those of the A, B, C, and D groups (P < 0.05). The mean EDs in the B, C, and D groups were reduced by 7.01%, 13.37%, and 18.87%, respectively, when compared with that of the A group. The SNR and CNR of the D4-D5 subgroups were higher than the D0-D3 subgroups, and the image quality scores of the D4 subgroups were higher than the other subgroups (P < 0.05). CONCLUSION The wide-detector combined with 70% pre-ASiR-V and 80% post-ASiR-V significantly reduces the radiation dose of CCTA while maintaining overall image quality as compared with the manufacture's recommendation of 40% pre-ASiR-V.
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Affiliation(s)
- Yongxia Zhao
- Department of Radiology, The Affiliated Hospital of Hebei University, Baoding, China
| | - Dongxue Li
- Department of Radiology, The Affiliated Hospital of Hebei University, Baoding, China
| | - Zhichao Liu
- Department of Radiology, The Affiliated Hospital of Hebei University, Baoding, China
| | - Xue Geng
- Department of Radiology, Baoding No. 2 Hospital, Baoding, China
| | - Tianle Zhang
- Department of Radiology, The Affiliated Hospital of Hebei University, Baoding, China
| | - Yize Xu
- Department of Radiology, The Affiliated Hospital of Hebei University, Baoding, China
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Kang EJ. Clinical Applications of Wide-Detector CT Scanners for Cardiothoracic Imaging: An Update. Korean J Radiol 2020; 20:1583-1596. [PMID: 31854147 PMCID: PMC6923215 DOI: 10.3348/kjr.2019.0327] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 07/23/2019] [Indexed: 12/21/2022] Open
Abstract
Technical developments in multidetector computed tomography (CT) have increased the number of detector rows on the z-axis, and 16-cm wide-area-coverage CT scanners have enabled volumetric scanning of the entire heart. Beyond coronary arterial imaging, such innovations offer several advantages during clinical imaging in the cardiothoracic area. The wide-detector CT scanner markedly reduces the image acquisition time to less than 1 second for coronary CT angiography, thereby decreasing the volume of contrast material and radiation dose required for the examination. It also eliminates stair-step artifacts, allowing robust improvements in myocardial function and perfusion imaging. Additionally, new imaging techniques for the cardiothoracic area, including subtraction imaging and free-breathing scans, have been developed and further improved by using the wide-detector CT scanner. This article investigates the technical developments in wide-detector CT scanners, summarizes their clinical applications in the cardiothoracic area, and provides a review of the recent literature.
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Affiliation(s)
- Eun Ju Kang
- Department of Radiology, College of Medicine, Dong-A University, Busan, Korea.
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Cao L, Liu X, Li J, Liang W, Qu T, Li Y, Jia X, Guo J. Improving the Degree and Uniformity of Enhancement in Coronary CT Angiography with a New Bolus Tracking Method Enabled By Free Breathing. Acad Radiol 2019; 26:1591-1596. [PMID: 30846313 DOI: 10.1016/j.acra.2019.01.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 01/24/2019] [Accepted: 01/25/2019] [Indexed: 01/19/2023]
Abstract
RATIONALE AND OBJECTIVES To demonstrate the improved enhancement degree and uniformity in coronary CT angiography (CCTA) on a 16 cm wide-coverage CT with a new bolus tracking method enabled by free-breathing, in comparison with the conventional breath-holding method. MATERIALS AND METHODS A total of 200 patients with suspected coronary heart disease were randomly divided into two groups for CCTA: Group A (n = 100, free-breathing) started CCTA with 2.2 seconds delay after the attenuation in aorta reached 250 HU; Group B (n = 100, breath-holding), used the standard protocol of 80 HU threshold and 8.4 seconds delay. Both groups used the contrast dose rate of 25 mgI/kg/s. CT value and standard deviation in aortic sinus (AS), right coronary artery, left anterior descending, left circumflex, and pericardial fat were measured. Contrast-to-noise ratio for vessels was calculated. Two experienced Radiologists independently reviewed image quality using a 5-point scale (1: nondiagnostic-5: excellent). RESULTS There was no difference in contrast dose, radiation dose, heart rate, and qualitative image quality between the two groups (all p > 0.05). However, Group A had higher mean enhancement in vessels (404 ± 66 HU) than Group B (321 ± 69 HU), and lower coefficients of variation of CT value in aortic sinus, right coronary artery, left anterior descending, and left circumflex (16.3%, 17.7%, 19.2%, and 20.5% vs 21.5%, 22.3%, 23.6%, and 22.9%, respectively), (all p < 0.05). CONCLUSION A new bolus tracking method enabled by free-breathing in CCTA on a 16 cm wide-coverage CT system increases the enhancement degree and uniformity in coronary arteries, compared with the conventional breath-holding method.
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Diagnostic performance of free-breathing coronary computed tomography angiography without heart rate control using 16-cm z-coverage CT with motion-correction algorithm. J Cardiovasc Comput Tomogr 2019; 13:113-117. [DOI: 10.1016/j.jcct.2019.01.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 10/14/2018] [Accepted: 01/03/2019] [Indexed: 11/17/2022]
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Le Roy J, Vernhet Kovacsik H, Zarqane H, Vincenti M, Abassi H, Lavastre K, Mura T, Lacampagne A, Amedro P. Submillisievert Multiphasic Coronary Computed Tomography Angiography for Pediatric Patients With Congenital Heart Diseases. Circ Cardiovasc Imaging 2019; 12:e008348. [PMID: 30704282 DOI: 10.1161/circimaging.118.008348] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The use of coronary computed tomography (CT) angiography in children with coronary artery anomalies is increasing. However, it remains technically demanding and the need to adapt acquisition parameters to a patient's cardiac characteristics has not yet been addressed. The aim of the study was to prospectively assess the feasibility of personalized multiphasic coronary CT angiography for pediatric patients. METHODS Fifty pediatric patients (mean age 6.1±4.9 years) with coronary artery anomalies underwent a coronary CT angiography on a wide detector single-source CT equipment. Fifteen different acquisition patterns were used to trigger the acquisition at the best theoretical moment within the cardiac cycle. The appropriate pattern was automatically selected based on the patient's heart rate and heart rate variability, derived from the patient's ECG. Two independent radiologists qualitatively evaluated images. RESULTS All acquisitions fully answered the clinical question for a mean effective dose of 0.97±0.34 mSv. Image quality qualified as good or excellent in 94% of cases (47/50). No examination was considered as not assessable but 6% (3/50) were scored as adequate for diagnosis. For these 3 patients, motion artifacts were the main cause of average image quality. No significant visual differences were reported between the different coronary arteries (mean score of 3.6 on a 4-point scale). No correlation between image quality and cardiac parameters were reported ( r=-0.19 and r=0.00, respectively for heart rate and heart rate variability). CONCLUSIONS Personalized multiphasic coronary CT angiography acquisitions could be performed with diagnostic quality for a dose equivalent of <4 months of natural background irradiation. CLINICAL TRIAL REGISTRATION URL: https://www.clinicaltrials.gov . Unique identifier: NCT03194763.
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Affiliation(s)
- Julien Le Roy
- Pediatric and Congenital Cardiology Department, M3C Regional Reference CHD Center, CHU Montpellier, France (J.L.R., M.V., H.A., K.L., P.A.).,PHYMEDEXP, University of Montpellier, CNRS, INSERM, CHU Montpellier, France (J.L.R., M.V., A.L., P.A.)
| | | | - Hamid Zarqane
- Radiology Department, CHU Montpellier, France (H.V.K., H.Z.)
| | - Marie Vincenti
- Pediatric and Congenital Cardiology Department, M3C Regional Reference CHD Center, CHU Montpellier, France (J.L.R., M.V., H.A., K.L., P.A.).,PHYMEDEXP, University of Montpellier, CNRS, INSERM, CHU Montpellier, France (J.L.R., M.V., A.L., P.A.)
| | - Hamouda Abassi
- Pediatric and Congenital Cardiology Department, M3C Regional Reference CHD Center, CHU Montpellier, France (J.L.R., M.V., H.A., K.L., P.A.)
| | - Kathleen Lavastre
- Pediatric and Congenital Cardiology Department, M3C Regional Reference CHD Center, CHU Montpellier, France (J.L.R., M.V., H.A., K.L., P.A.)
| | - Thibault Mura
- Epidemiology and Clinical Research Department, University of Montpellier, INSERM, CHU Montpellier, France (T.M.)
| | - Alain Lacampagne
- PHYMEDEXP, University of Montpellier, CNRS, INSERM, CHU Montpellier, France (J.L.R., M.V., A.L., P.A.)
| | - Pascal Amedro
- Pediatric and Congenital Cardiology Department, M3C Regional Reference CHD Center, CHU Montpellier, France (J.L.R., M.V., H.A., K.L., P.A.).,PHYMEDEXP, University of Montpellier, CNRS, INSERM, CHU Montpellier, France (J.L.R., M.V., A.L., P.A.)
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Qu TT, Li JY, Jiao XJ, Zhang XL, Song ZF, Guo YX, Guo JX. Contrast dose reduction with shortened injection durations in coronary CT angiography on 16-cm Wide-detector CT scanner. Br J Radiol 2018; 91:20180580. [PMID: 30160183 PMCID: PMC6319827 DOI: 10.1259/bjr.20180580] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 08/12/2018] [Accepted: 08/14/2018] [Indexed: 01/11/2023] Open
Abstract
OBJECTIVES: To investigate the use of shortened contrast injection with late triggering in coronary CT angiography (CCTA) for decreasing contrast dose and maintaining image quality. METHODS: 106 patients for CCTA on a 16-cm wide-detector CT were prospectively enrolled into groups A (n = 50) and B (n = 56) randomly. Patient weight-dependent contrast medium (Iopamiro, 370 mgI ml-1) at dose rate of 25 mgI/kg/s was used with 8 s and the standard 10 s injection time in groups A and B, respectively. CT values of the aortic sinus (AS), right coronary artery, left anterior descending and left circumflex at the proximal, middle and distal segments were measured and compared. Subjective image quality was evaluated and analyzed with Fisher exact test. Contrast dose, injection rate and enhancement duration (between the start of enhancement in AS and scan finish) were also compared. RESULTS: There was no difference in the injection rate and enhancement duration between the two groups (p > 0.05), while the total contrast dose in group A (36.2 ± 5.7 ml) was significantly lower than in group B (46.4 ± 6.3 ml) (p < 0.001). There was no difference for CT values in all major coronary vessels between the two groups and no difference in subjective image quality scores (all p > 0.05). CONCLUSION: It is feasible to shorten contrast injection to 8 s in CCTA on wide-detector CT systems to significantly reduce contrast dosage, maintain adequate enhancement and reduce contrast-related artifacts. ADVANCES IN KNOWLEDGE: (1) Coronary CT angiography (CCTA) scans with shortened contrast medium injection duration and late triggering are feasible with a 16-cm wide-detector CT system (2) Compared with the conventional CCTA with 10 s contrast injection duration, the new contrast injection protocol of using shortened injection duration (to 8 s) and late triggering reduces contrast dose to 36.2 ml, while maintaining adequate enhancement in vessels and reducing contrast-related artifacts.
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Affiliation(s)
- Ting-ting Qu
- Department of Radiology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi'an, PR China
| | - Jian-ying Li
- CT Research Center, GE Healthcare China, Beijing, China
| | - Xi-jun Jiao
- Department of Radiology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi'an, PR China
| | - Xiang-li Zhang
- Department of Radiology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi'an, PR China
| | - Zhe-fan Song
- Department of Radiology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi'an, PR China
| | - Yin-xia Guo
- Department of Radiology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi'an, PR China
| | - Jian-xin Guo
- Department of Radiology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi'an, PR China
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Shuai T, Deng L, Pan Y, Li W, Liao K, Li J, Peng L, Li Z. Free-breathing coronary CT angiography using 16-cm wide-detector for challenging patients: comparison with invasive coronary angiography. Clin Radiol 2018; 73:986.e1-986.e6. [DOI: 10.1016/j.crad.2018.06.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 06/20/2018] [Indexed: 12/01/2022]
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Ghekiere O, Nchimi A, Djekic J, El Hachemi M, Mancini I, Hansen D, Vanhoenacker P, de Roos A, Dendale P. Coronary Computed Tomography Angiography: Patient-related factors determining image quality using a second-generation 320-slice CT scanner. Int J Cardiol 2016; 221:970-6. [PMID: 27441477 DOI: 10.1016/j.ijcard.2016.07.141] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 07/07/2016] [Accepted: 07/08/2016] [Indexed: 10/21/2022]
Abstract
PURPOSE To investigate the diagnostic confidence of Coronary Computed Tomography Angiography (CCTA) and the effect of patient-related factors on CCTA image quality using a second-generation 320-slice scanner. METHODS AND RESULTS 200 consecutive patients (mean age 60±12years; 109 men) prospectively underwent CCTA. The mean body mass index (BMI) was 27.1±4.9kg/m(2); the median heart rate (HR) was 60.0 (interquartile range (IQR), 53.9-66.1) beats per minute (bpm). The median segment's diameter was 2.8 (IQR, 2.2-3.4) mm. For each coronary segment ≥1.5mm in diameter, two readers scored: diameter narrowing as < or ≥50%, overall diagnostic confidence and motion-related image quality, with interobserver agreement kappa-values of 0.89, 0.91 and 0.61 respectively. Seventy-nine of the 2505 evaluated segments (3.2%) had non-diagnostic image quality because of coronary calcifications (66/79; 83.5%), stent- (6/79; 7.5%), pacemaker- (2/79; 2.5%) or motion-related artifacts (5/79; 6.5%). The effect of patient-related factors on motion-related image quality was investigated by multinomial logistic regression in 181 patients with calcium score (IQR, 0-446.5). Increasing coronary diameter was the most improving image quality factor (odds ratio (OR), 1.8637; p<0.001), marginally followed by lower HR (OR, 0.9547; p<0.001) and calcium score (OR, 0.9997; p=0.04). Gender (p=0.70), age (p=0.24) and BMI (p=0.45) did not affect image quality. CONCLUSION Using a second-generation 320-slice scanner, CCTA diagnostic confidence is predominantly affected by coronary calcifications, whereas motion-related image quality is non-diagnostic only in exceptional cases and mainly influenced by the coronary diameter. For future developments, our study findings therefore suggest greater requirements concerning spatial resolution and calcium-related artifact removal than concerning temporal resolution, especially to improve diagnostic confidence in patient groups with smaller coronary diameters.
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Affiliation(s)
- Olivier Ghekiere
- Department of Radiology, Centre Hospitalier Chrétien (CHC), Rue de Hesbaye, 75, B-4000 Liège, Belgium; Department of Radiology, Jessa Hospital, Stadsomvaart 11, B-3500 Hasselt, Belgium; Faculty of Medicine and Life Sciences, Biomed and Reval, Hasselt University, Agoralaan, Building A and C, B-3500 Hasselt, Belgium.
| | - Alain Nchimi
- Liège University (ULg), GIGA Cardiovascular Sciences, Domaine Universitaire du Sart Tilman, Rue de l'hôpital, 1, B-4000 Liège, Belgium
| | - Julien Djekic
- Department of Radiology, Centre Hospitalier Chrétien (CHC), Rue de Hesbaye, 75, B-4000 Liège, Belgium
| | - Mounia El Hachemi
- Liège University (ULg), GIGA Cardiovascular Sciences, Domaine Universitaire du Sart Tilman, Rue de l'hôpital, 1, B-4000 Liège, Belgium
| | - Isabelle Mancini
- Department of Radiology, Centre Hospitalier Chrétien (CHC), Rue de Hesbaye, 75, B-4000 Liège, Belgium
| | - Dominique Hansen
- Faculty of Medicine and Life Sciences, Biomed and Reval, Hasselt University, Agoralaan, Building A and C, B-3500 Hasselt, Belgium
| | - Piet Vanhoenacker
- Department of Radiology, OLV Hospital Aalst, Moorselbaan 164, B-9300 Aalst, Belgium
| | - Albert de Roos
- Department of Radiology, Leiden University Medical Center, Albinusdreef, 2, NL-2333 ZA Leiden, The Netherlands
| | - Paul Dendale
- Faculty of Medicine and Life Sciences, Biomed and Reval, Hasselt University, Agoralaan, Building A and C, B-3500 Hasselt, Belgium; Heart Center Hasselt, Jessa Hospital, Stadsomvaart, 11, B-3500 Hasselt, Belgium
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Abstract
Usually, coronary computed tomography angiography (CCTA) is performed during breath-holding to reduce artifact caused by respiration. The objective of this study was to evaluate the feasibility of free-breathing CCTA compared to breath-holding using CT scanner with wide detector. To evaluate the feasibility of CCTA during free-breathing using a 256-MDCT. In 80 patients who underwent CCTA, 40 were performed during breath-holding (group A), and the remaining 40 during free-breathing (group B). The quality scores for coronary arteries were analyzed and defined as: 3 (excellent), 2 (good), and 1 (poor). The image noise, signal-to-noise ratio and effective radiation dose as well as the heart rate variation were compared. The noise, signal-to-noise ratio, and effective radiation dose were not significantly different between the 2 groups. The mean heart rate variation between planning and scanning for group A was 7 ± 7.6 bpm, and larger than 3 ± 2.6 bpm for group B (P = 0.012). Quality scores of the free-breathing group were better than those of the breath-holding group (group A: 2.55 ± 0.64, group B: 2.85 ± 0.36, P = 0.018). Free-breathing CCTA is feasible on wide detector CT scanner to provide acceptable image quality with reduced heart rate variation and better images for certain patients.
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Affiliation(s)
- Zhuo Liu
- Department of Radiology, Peking University People's Hospital, Beijing, China
- Correspondence: Zhuo Liu, BE, Peking University People's Hospital, Beijing, China (e-mail: )
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13
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Menke J, Kowalski J. Diagnostic accuracy and utility of coronary CT angiography with consideration of unevaluable results: A systematic review and multivariate Bayesian random-effects meta-analysis with intention to diagnose. Eur Radiol 2015; 26:451-8. [DOI: 10.1007/s00330-015-3831-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 04/25/2015] [Accepted: 04/28/2015] [Indexed: 12/21/2022]
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14
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Wong DTL, Soh SY, Ko BSH, Cameron JD, Crossett M, Nasis A, Troupis J, Meredith IT, Seneviratne SK. Superior CT coronary angiography image quality at lower radiation exposure with second generation 320-detector row CT in patients with elevated heart rate: a comparison with first generation 320-detector row CT. Cardiovasc Diagn Ther 2014; 4:299-306. [PMID: 25276615 DOI: 10.3978/j.issn.2223-3652.2014.08.05] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Accepted: 08/11/2014] [Indexed: 12/21/2022]
Abstract
BACKGROUND This study aims to compare the image quality of second generation versus first generation 320-computed tomography coronary angiography (CTCA) in patients with heart rate ≥65 bpm as it has not been specifically reported. METHODS Consecutive patients who underwent CTCA using second-generation-320-detector-row-CT were prospectively enrolled. A total of 50 patients with elevated (≥65 bpm) heart rate and 50 patients with controlled (<65 bpm) heart rate were included. Age and gender matched patients who were scanned with the first-generation-320-detector-row-CT were retrospectively identified. Image quality in each coronary artery segment was assessed by two blinded CT angiographers using the five-point Likert scale. RESULTS In the elevated heart rate cohorts, while there was no significant difference in heart rate during scan-acquisition (66 vs. 69 bpm, P=0.308), or body mass index (28.5 vs. 29.6, P=0.464), the second generation scanner was associated with better image quality (3.94±0.6 vs. 3.45±0.8, P=0.001), and with lower radiation (2.8 vs. 4.3 mSv, P=0.009). There was no difference in scan image quality for the controlled heart rate cohorts. CONCLUSIONS The second generation CT scanner provides better image quality at lower radiation dose in patients with elevated heart rate (≥65 bpm) compared to first generation CT scanner.
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Affiliation(s)
- Dennis T L Wong
- 1 Monash Heart, Monash Cardiovascular Research Centre & Monash University, Clayton, Victoria, Australia ; 2 Department of Diagnostic Imaging, MMC, Southern Health, Melbourne, Australia
| | - Siang Y Soh
- 1 Monash Heart, Monash Cardiovascular Research Centre & Monash University, Clayton, Victoria, Australia ; 2 Department of Diagnostic Imaging, MMC, Southern Health, Melbourne, Australia
| | - Brian S H Ko
- 1 Monash Heart, Monash Cardiovascular Research Centre & Monash University, Clayton, Victoria, Australia ; 2 Department of Diagnostic Imaging, MMC, Southern Health, Melbourne, Australia
| | - James D Cameron
- 1 Monash Heart, Monash Cardiovascular Research Centre & Monash University, Clayton, Victoria, Australia ; 2 Department of Diagnostic Imaging, MMC, Southern Health, Melbourne, Australia
| | - Marcus Crossett
- 1 Monash Heart, Monash Cardiovascular Research Centre & Monash University, Clayton, Victoria, Australia ; 2 Department of Diagnostic Imaging, MMC, Southern Health, Melbourne, Australia
| | - Arthur Nasis
- 1 Monash Heart, Monash Cardiovascular Research Centre & Monash University, Clayton, Victoria, Australia ; 2 Department of Diagnostic Imaging, MMC, Southern Health, Melbourne, Australia
| | - John Troupis
- 1 Monash Heart, Monash Cardiovascular Research Centre & Monash University, Clayton, Victoria, Australia ; 2 Department of Diagnostic Imaging, MMC, Southern Health, Melbourne, Australia
| | - Ian T Meredith
- 1 Monash Heart, Monash Cardiovascular Research Centre & Monash University, Clayton, Victoria, Australia ; 2 Department of Diagnostic Imaging, MMC, Southern Health, Melbourne, Australia
| | - Sujith K Seneviratne
- 1 Monash Heart, Monash Cardiovascular Research Centre & Monash University, Clayton, Victoria, Australia ; 2 Department of Diagnostic Imaging, MMC, Southern Health, Melbourne, Australia
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15
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High-pitch coronary CT angiography in dual-source CT during free breathing vs. breath holding in patients with low heart rates. Eur J Radiol 2013; 82:2217-21. [PMID: 24075783 DOI: 10.1016/j.ejrad.2013.09.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 08/28/2013] [Accepted: 09/03/2013] [Indexed: 11/24/2022]
Abstract
BACKGROUND Coronary CT angiography (CCTA) is usually performed during breath holding to reduce motion artifacts caused by respiration. However, some patients are not able to follow the breathing commands adequately due to deafness, hearing impairment, agitation or pulmonary diseases. The aim of this study was to evaluate the potential of high-pitch CCTA in free breathing patients when compared to breath holding patients. METHODS In this study we evaluated 40 patients (20 free breathing and 20 breath holding patients) with a heart rate of 60 bpm or below referred for CCTA who were examined on a 2nd generation dual-source CT system. Image quality of each coronary artery segment was rated using a 4-point grading scale (1: non diagnostic-4: excellent). RESULTS Mean heart rate during image acquisition was 52 ± 5 bpm in both groups. There was no significant difference in mean image quality, slightly favoring image acquisition during breath holding (mean image quality score 3.76 ± 0.32 in breath holding patients vs. 3.61 ± 0.45 in free breathing patients; p = 0.411). Due to a smaller amount of injected contrast medium, there was a trend for signal intensity to be slightly lower in free breathing patients, but this was not statistically significant (435 ± 123 HU vs. 473 ± 117 HU; p=0.648). CONCLUSION In patients with a low heart rate who are not able to hold their breath adequately, CCTA can also be acquired during free breathing without substantial loss of image quality when using a high pitch scan mode in 2nd generation dual-source CT.
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Lembcke A, Schwenke C, Hein PA, Knobloch G, Durmus T, Hamm B, Huppertz A. High-pitch dual-source CT coronary angiography with low volumes of contrast medium. Eur Radiol 2013; 24:120-7. [PMID: 23949727 DOI: 10.1007/s00330-013-2988-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 07/13/2013] [Accepted: 07/17/2013] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To assess the effect of lower volumes of contrast medium (CM) on image quality in high-pitch dual-source computed tomography coronary angiography (CTCA). METHODS One-hundred consecutive patients (body weight 65-85 kg, stable heart rate ≤65 bpm, cardiac index ≥2.5 L/min/m(2)) referred for CTCA were prospectively enrolled. Patients were randomly assigned to one of five groups of different CM volumes (G30, 30 mL; G40, 40 mL; G50, 50 mL; G60, 60 mL; G70, 70 mL; flow rate 5 mL/s each, iodine content 370 mg/mL). Attenuation within the proximal and distal coronary artery segments was analysed. RESULTS Mean attenuation for men and women ranged from 345.0 and 399.1 HU in G30 to 478.2 and 571.8 HU in G70. Mean attenuation values were higher in groups with higher CM volumes (P < 0.0001) and higher in women than in men (P < 0.0001). The proportions of segments with attenuation of at least 300 HU in G30, G40, G50, G60 and G70 were 89 %, 95 %, 98 %, 98 % and 99 %. CM volume of 30 mL in women and 40 mL in men proved to be sufficient to guarantee attenuation of at least 300 HU. CONCLUSIONS In selected patients high-pitch dual-source CTCA can be performed with CM volumes of 40 mL in men or 30 mL in women. KEY POINTS • High-pitch dual-source coronary angiography is feasible with low contrast media volumes. • Traditional injection rules still apply: higher volumes result in higher enhancement. • The patient's gender is a co-factor determining the level of contrast enhancement. • Volumes can be reduced down to 30-40 mL in selected patients.
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Affiliation(s)
- Alexander Lembcke
- Department of Radiology, Charité - University Medicine Berlin, Campus Charité Mitte, Charitéplatz 1, 10117, Berlin, Germany,
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