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2002 1
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Page 1
Computed Tomography-Based Coronary Artery Calcium Score Calculation at a Reduced Tube Voltage Utilizing Iterative Reconstruction and Threshold Modification Techniques: A Feasibility Study.
Habibi S, Akbarnejad M, Rezaeian N, Salmanipour A, Mohammadzadeh A, Rezaei-Kalantari K, Chalian H, Asadian S. Habibi S, et al. Diagnostics (Basel). 2023 Oct 26;13(21):3315. doi: 10.3390/diagnostics13213315. Diagnostics (Basel). 2023. PMID: 37958211 Free PMC article.
We aimed to investigate the accuracy of iterative reconstruction (IR) and threshold modification while applying low tube voltage in coronary artery calcium imaging. ...The standard filtered back projection (FBP) reconstruction was applied in both voltages. Co …
We aimed to investigate the accuracy of iterative reconstruction (IR) and threshold modification while applying low tube voltage in …
Coronary plaque composition assessed by cardiac computed tomography using adaptive Hounsfield unit thresholds.
de Knegt MC, Haugen M, Jensen AK, Linde JJ, Kühl JT, Hove JD, Kofoed KF. de Knegt MC, et al. Clin Imaging. 2019 Sep-Oct;57:7-14. doi: 10.1016/j.clinimag.2019.04.014. Epub 2019 Apr 25. Clin Imaging. 2019. PMID: 31078917
PURPOSE: Quantitative computed tomography (QCT) may be useful in detecting high-risk patients with coronary atherosclerosis. Assessment of plaque composition using fixed Hounsfield unit (HU) thresholds is influenced by luminal contrast density. ...METH …
PURPOSE: Quantitative computed tomography (QCT) may be useful in detecting high-risk patients with coronary atherosclerosis. Assessme …
Self-expanding versus balloon-expandable transcatheter heart valves in patients with excessive aortic valve cusp calcification.
Tomii D, Alaour B, Heg D, Okuno T, Nakase M, Samim D, Praz F, Lanz J, Stortecky S, Reineke D, Windecker S, Pilgrim T. Tomii D, et al. Am Heart J. 2026 Feb;292:107279. doi: 10.1016/j.ahj.2025.09.011. Epub 2025 Sep 18. Am Heart J. 2026. PMID: 40975195 Free article.
METHODS: Consecutive patients with severe aortic stenosis and aortic valve complex calcium volume 235 mm3 (on contrast images with Hounsfield unit threshold of 850) who underwent TAVR with either CoreValve/Evolut SEV or SAPIEN BEV from August 2007 to …
METHODS: Consecutive patients with severe aortic stenosis and aortic valve complex calcium volume 235 mm3 (on contrast images with …
A method for coronary artery calcium scoring using contrast-enhanced computed tomography.
Otton JM, Lønborg JT, Boshell D, Feneley M, Hayen A, Sammel N, Sesel K, Bester L, McCrohon J. Otton JM, et al. J Cardiovasc Comput Tomogr. 2012 Jan-Feb;6(1):37-44. doi: 10.1016/j.jcct.2011.11.004. Epub 2011 Nov 20. J Cardiovasc Comput Tomogr. 2012. PMID: 22210533
METHODS: The volume of intramural calcium of >320 HU in major coronary vessels was measured in 90 contrast-enhanced and traditional non-contrast calcium scan pairs. ...Inter-observer and intra-observer reliability with the intraclass correlation was 0.99. …
METHODS: The volume of intramural calcium of >320 HU in major coronary vessels was measured in 90 contrast-enhanced and tra …
Fully automated quantification method (FQM) of coronary calcium in an anthropomorphic phantom.
van Praagh GD, van der Werf NR, Wang J, van Ommen F, Poelhekken K, Slart RHJA, Fleischmann D, Greuter MJW, Leiner T, Willemink MJ. van Praagh GD, et al. Med Phys. 2021 Jul;48(7):3730-3740. doi: 10.1002/mp.14912. Epub 2021 May 17. Med Phys. 2021. PMID: 33932026 Free PMC article.
OBJECTIVE: Coronary artery calcium (CAC) score is a strong predictor for future adverse cardiovascular events. ...RESULTS: Three parameters in CAC scoring methods varied among the different vendor-specific software packages: the Hounsfield unit (HU) …
OBJECTIVE: Coronary artery calcium (CAC) score is a strong predictor for future adverse cardiovascular events. ...RESULTS: Thr …
Contrast-enhanced computed tomography assessment of aortic stenosis.
Cartlidge TR, Bing R, Kwiecinski J, Guzzetti E, Pawade TA, Doris MK, Adamson PD, Massera D, Lembo M, Peeters FECM, Couture C, Berman DS, Dey D, Slomka P, Pibarot P, Newby DE, Clavel MA, Dweck MR. Cartlidge TR, et al. Heart. 2021 Dec;107(23):1905-1911. doi: 10.1136/heartjnl-2020-318556. Epub 2021 Jan 29. Heart. 2021. PMID: 33514522 Free PMC article.
Calcific and non-calcific (fibrosis) valve tissue volumes were quantified and indexed to annulus area, using Hounsfield unit thresholds calibrated against blood pool radiodensity. The fibrocalcific ratio assessed the relative contributions of valve fibrosis a …
Calcific and non-calcific (fibrosis) valve tissue volumes were quantified and indexed to annulus area, using Hounsfield unit …
Carotid artery calcium score: Definition, classification, application, and limits.
Saba L, Benson JC, Scicolone R, Paraskevas KI, Gupta A, Cau R, Suri JS, Schindler A, Balestrieri A, Nardi V, Song JW, Wintermark M, Lanzino G. Saba L, et al. Neuroradiol J. 2024 Oct;37(5):611-619. doi: 10.1177/19714009241252623. Epub 2024 May 8. Neuroradiol J. 2024. PMID: 38718167 Free PMC article.
This value should be multiplied by the conversion factor ("or voxel size") and divided by a weighting factor, the attenuation threshold to consider a voxel as calcified (and therefore 130 HU): this equation determines the Carotid Artery Calcium Score (CACS). ...This …
This value should be multiplied by the conversion factor ("or voxel size") and divided by a weighting factor, the attenuation threshold …
Association of Tube Voltage With Plaque Composition on Coronary CT Angiography: Results From PARADIGM Registry.
Takagi H, Leipsic JA, Indraratna P, Gulsin G, Khasanova E, Tzimas G, Lin FY, Shaw LJ, Lee SE, Andreini D, Al-Mallah MH, Budoff MJ, Cademartiri F, Chinnaiyan K, Choi JH, Conte E, Marques H, de Araújo Gonçalves P, Gottlieb I, Hadamitzky M, Maffei E, Pontone G, Shin S, Kim YJ, Lee BK, Chun EJ, Sung JM, Virmani R, Samady H, Stone PH, Berman DS, Narula J, Bax JJ, Chang HJ. Takagi H, et al. JACC Cardiovasc Imaging. 2021 Dec;14(12):2429-2440. doi: 10.1016/j.jcmg.2021.07.011. Epub 2021 Aug 18. JACC Cardiovasc Imaging. 2021. PMID: 34419398 Free article.
OBJECTIVES: This study sought to investigate the impact of low tube voltage scanning heterogeneity of coronary luminal attenuation on plaque quantification and characterization with coronary computed tomography angiography (CCTA). ...Patients with prior revasculariz …
OBJECTIVES: This study sought to investigate the impact of low tube voltage scanning heterogeneity of coronary luminal attenuation on …
Optimal cutoff threshold for calcium quantification in isotropic CT calcium scans by validating against registered intravascular ultrasound with radiofrequency backscatter.
Dhungel A, Qian Z, Vazquez G, Rinehart S, Weeks M, Voros S. Dhungel A, et al. Annu Int Conf IEEE Eng Med Biol Soc. 2012;2012:4982-5. doi: 10.1109/EMBC.2012.6347111. Annu Int Conf IEEE Eng Med Biol Soc. 2012. PMID: 23367046
The calcium volume is quantified by registering voxels with attenuation values greater than or equal to 130 Hounsfield Unit (HU). ...From the statistical analysis of calcium data obtained from the images of 9 patients we found a range of optimal thr …
The calcium volume is quantified by registering voxels with attenuation values greater than or equal to 130 Hounsfield Unit …
Aortic valve calcium volume as measured by native versus contrast-enhanced computer tomography and the implications for the diagnosis of severe aortic stenosis in TAVR patients with low-gradient aortic stenosis.
El Garhy M, Owais T, Lauten P. El Garhy M, et al. Egypt Heart J. 2022 Sep 30;74(1):71. doi: 10.1186/s43044-022-00311-8. Egypt Heart J. 2022. PMID: 36178641 Free PMC article.
We studied also the difference between patients with low-gradient (LG) and high-gradient (HG) severe aortic stenosis (AS) as regard the burden of aortic valve calcium (AVC). RESULTS: We measured the calcium volume and score using Agatston methodology in non-contrast …
We studied also the difference between patients with low-gradient (LG) and high-gradient (HG) severe aortic stenosis (AS) as regard the burd …
17 results