Coronary Artery Stent Evaluation with Model-based Iterative Reconstruction at Coronary CT Angiography

Tatsugami, Fuminari; Higaki, Toru; Sakane, Hiroaki; Fukumoto, Wataru; Kaichi, Yoko; Iida, Michihisa; Baba, Yasutaka; Kiguchi, Masao; Kihara, Yasuki; Tsushima, So; Awai, Kazuo

doi:10.1016/j.acra.2016.12.020

Cited by 43 publications

(22 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the advancement of IR algorithm from HIR to MBIR, the utility of low-radiation-dose CT with MBIR has been investigated in chest [11], abdomen [12], and cardiovascular fields [13]. In the cervical spine field, CT reconstructed with HIR has been well investigated [14][15][16], but CT reconstructed with MBIR is not sufficiently recognized in the spine field.…”

Section: Scanning and Reconstruction Time Using A Phantommentioning

confidence: 99%

Cervical spinal computed tomography utilizing model-based iterative reconstruction reduces radiation to an equivalent of three cervical X-rays

et al. 2020

View full text Add to dashboard Cite

Purpose To evaluate radiation dose and image quality of cervical spinal computed tomography scanned with low-radiation dose (LD-CT) utilizing model-based iterative reconstruction (MBIR). Methods We retrospectively examined 14 patients (65.5 ± 13.9 years) who underwent both standard-radiation-dose CT (SD-CT) reconstructed with hybrid iterative reconstruction and LD-CT of cervical spine. The radiation dose, objective image quality indicator, which includes signal-to-noise and contrast-to-noise, and subjective image quality score of the anatomical landmarks in the SD-CT and LD-CT were statistically compared. In addition, the measurement errors of the length of C3 vertebrae (height, anteroposterior length, inner and outer pedicle diameters) between SD-CT and LD-CT were analyzed. Results Radiation dose of LD-CT was reduced to one-sixth of the dose of SD-CT. The objective image quality indicator of LD-CT was significantly better than that of SD-CT. The subjective image quality of LD-CT was relatively worse than that of SD-CT but generally graded as clinically accepted or higher. There was no remarkable difference between SD-CT and LD-CT in the measurement value of height and anteroposterior length. Inner pedicle diameter was significantly (0.21 ± 0.13 mm) smaller, and outer pedicle diameter was (0.24 ± 0.14 mm) larger on LD-CT than on SD-CT. Conclusion Cervical spinal LD-CT that utilized MBIR enabled radical decrease in radiation dose and provided sufficient image quality for clinical use. This scanning protocol can be a good alternative for protecting patients from exposure to unnecessary radiation, especially when a patient requires multiple CT scans.

show abstract

Section: Scanning and Reconstruction Time Using A Phantommentioning

confidence: 99%

Cervical spinal computed tomography utilizing model-based iterative reconstruction reduces radiation to an equivalent of three cervical X-rays

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The noise level is one of the important determinants of image quality, but our study results suggested that improved spatial resolution might be more beneficial for the visual evaluation. Tatsugami et al [ 22 ] investigated the effect of FIRST-CS on in-stent visualization, and they quantitatively and qualitatively demonstrated that FIRST-CS improved the sharpness of stent visualization with higher spatial resolution.…”

Section: Discussionmentioning

confidence: 99%

Tradeoff between noise reduction and inartificial visualization in a model-based iterative reconstruction algorithm on coronary computed tomography angiography

et al. 2018

View full text Add to dashboard Cite

We aimed to evaluate the image quality performance of coronary CT angiography (CTA) under the different settings of forward-projected model-based iterative reconstruction solutions (FIRST).Thirty patients undergoing coronary CTA were included. Each image was reconstructed using filtered back projection (FBP), adaptive iterative dose reduction 3D (AIDR-3D), and 2 model-based iterative reconstructions including FIRST-body and FIRST-cardiac sharp (CS). CT number and noise were measured in the coronary vessels and plaque. Subjective image-quality scores were obtained for noise and structure visibility.In the objective image analysis, FIRST-body produced the significantly highest contrast-to-noise ratio. Regarding subjective image quality, FIRST-CS had the highest score for structure visibility, although the image noise score was inferior to that of FIRST-body.In conclusion, FIRST provides significant improvements in objective and subjective image quality compared with FBP and AIDR-3D. FIRST-body effectively reduces image noise, but the structure visibility with FIRST-CS was superior to FIRST-body.

show abstract

“…As shown in Fig. 2 , we measured the width of the edge response of the calcifications, determined by the 10–90 % edge rise distance (ERD), and calculated the edge rise slope (ERS) as: ERS = (CT90 %-CT10 %)/ERD [ 26 ]. The ERD and ERS were examined on both sides and the ERS obtained in NR- and SHR mode was compared.…”

Section: Methodsmentioning

confidence: 99%

Measurement of coronary artery calcium volume using ultra-high-resolution computed tomography: A preliminary phantom and cadaver study

Fukumoto

Nagaoka

Higaki

et al. 2020

European Journal of Radiology Open

Self Cite

View full text Add to dashboard Cite

show abstract

Coronary Artery Stent Evaluation with Model-based Iterative Reconstruction at Coronary CT Angiography

Cited by 43 publications

References 26 publications

Cervical spinal computed tomography utilizing model-based iterative reconstruction reduces radiation to an equivalent of three cervical X-rays

Cervical spinal computed tomography utilizing model-based iterative reconstruction reduces radiation to an equivalent of three cervical X-rays

Tradeoff between noise reduction and inartificial visualization in a model-based iterative reconstruction algorithm on coronary computed tomography angiography

Measurement of coronary artery calcium volume using ultra-high-resolution computed tomography: A preliminary phantom and cadaver study

Contact Info

Product

Resources

About