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Kakuya Kitagawa 아시아심장혈관영상의학회 2023 Cardiovascular Imaging Asia Vol.7 No.2
In recent years, there has been a remarkable surge of interest in computed tomography myocardial perfusion imaging (CT-MPI) across Asian countries. Recognizing its immense potential and the need for collective action, the Administration office & Office of President officer’s meeting on September 28, 2022, made the decision to establish the CT-MPI Study Group—an collaborative effort dedicated to advancing this innovative imaging modality throughout the region.
Isolated Right Ventricular Apical Hypoplasia: A Case Report with 18 Years of Follow Up
Oya Takashi,Kitagawa Kakuya,Kokawa Takanori,Nakajima Hiroshi,Nakamori Shiro,Ogihara Yoshito,Nakata Kei,Ishida Masaki,Ichikawa Yasutaka,Sakuma Hajime 아시아심장혈관영상의학회 2021 Cardiovascular Imaging Asia Vol.5 No.2
Isolated right ventricular (RV) hypoplasia is a rare congenital anomaly in which the apical trabecular component of the ventricle fails to develop. In severe forms of isolated RV hypoplasia, patients usually develop cyanosis early in life and require prompt surgical intervention. Mild forms, however, can be asymptomatic until the development of severe tricuspid regurgitation due to annular dilatation. We report a 50-year-old woman with isolated RV apical hypoplasia who presented to our hospital 18 years ago and was followed with serial imaging studies.
Masafumi Takafuji,Kakuya Kitagawa,Masaki Ishida,Yoshitaka Goto,Satoshi Nakamura,Naoki Nagasawa,Hajime Sakuma 대한영상의학회 2020 Korean Journal of Radiology Vol.21 No.1
Objective: Third-generation dual-source computed tomography (3rd-DSCT) allows dynamic myocardial CT perfusion imaging (dynamic CTP) with a 10.5-cm z-axis coverage. Although the increased radiation exposure associated with the 50% wider scan range compared to second-generation DSCT (2nd-DSCT) may be suppressed by using a tube voltage of 70 kV, it remains unclear whether image quality and the ability to quantify myocardial blood flow (MBF) can be maintained under these conditions. This study aimed to compare the image quality, estimated MBF, and radiation dose of dynamic CTP between 2nd- DSCT and 3rd-DSCT and to evaluate whether a 10.5-cm coverage is suitable for dynamic CTP. Materials and Methods: We retrospectively analyzed 107 patients who underwent dynamic CTP using 2nd-DSCT at 80 kV (n = 54) or 3rd-DSCT at 70 kV (n = 53). Image quality, estimated MBF, radiation dose, and coverage of left ventricular (LV) myocardium were compared. Results: No significant differences were observed between 3rd-DSCT and 2nd-DSCT in contrast-to-noise ratio (37.4 ± 11.4 vs. 35.5 ± 11.2, p = 0.396). Effective radiation dose was lower with 3rd-DSCT (3.97 ± 0.92 mSv with a conversion factor of 0.017 mSv/mGy∙cm) compared to 2nd-DSCT (5.49 ± 1.36 mSv, p < 0.001). Incomplete coverage was more frequent with 2nd-DSCT than with 3rd-DSCT (1.9% [1/53] vs. 56% [30/54], p < 0.001). In propensity score-matched cohorts, MBF was comparable between 3rd-DSCT and 2nd-DSCT in non-ischemic (146.2 ± 26.5 vs. 157.5 ± 34.9 mL/min/100 g, p = 0.137) as well as ischemic myocardium (92.7 ± 21.1 vs. 90.9 ± 29.7 mL/min/100 g, p = 0.876). Conclusion: The radiation increase inherent to the widened z-axis coverage in 3rd-DSCT can be balanced by using a tube voltage of 70 kV without compromising image quality or MBF quantification. In dynamic CTP, a z-axis coverage of 10.5 cm is sufficient to achieve complete coverage of the LV myocardium in most patients.
박철환,Kim Cherry,Lee Bae Young,Park Chan Ho,Kang Eun-Ju,Koo Hyun Jung,Kitagawa Kakuya,Cha Min Jae,Krittayaphong Rungroj,Choi Sang Il,Viswamitra Sanjaya,고성민,Kim Sung Mok,Hwang Sung Ho,Trang Nguyen Ngoc,L 아시아심장혈관영상의학회 2021 Cardiovascular Imaging Asia Vol.5 No.2
The Asian Society of Cardiovascular Imaging-Practical Tutorial (ASCI-PT) is an educational program of the ASCI School, which was founded in 2019. In 2020, ASCI-PT was held from November 23rd to 25th for the purpose of creating a consensus statement on semi-quantitative scoring for late gadolinium enhancement (LGE) in patients with ischemic cardiomyopathy. Eighteen panelists from five countries meticulously reviewed the existing guidelines and addressed seven issues to improve the communication of LGE interpretation and reduce inter-observer variability. All panels participated in online or offline sessions to build a consensus on LGE scoring. This summarizes the ASCI-PT 2020 proceedings and provides a consensus statement for conducting semi-quantitative LGE scoring.
Kim Cherry,Park Chul Hwan,Lee Bae Young,Park Chan Ho,Kang Eun-Ju,Koo Hyun Jung,Kitagawa Kakuya,Cha Min Jae,Krittayaphong Rungroj,Choi Sang Il,Yong Hwan Seok,Ko Sung Min,Kim Sung Mok,Hwang Sung Ho,Tran 대한영상의학회 2024 Korean Journal of Radiology Vol.25 No.4
The Asian Society of Cardiovascular Imaging-Practical Tutorial (ASCI-PT) is an instructional initiative of the ASCI School designed to enhance educational standards. In 2021, the ASCI-PT was convened with the goal of formulating a consensus statement on the assessment of coronary stenosis and coronary plaque using coronary CT angiography (CCTA). Nineteen experts from four countries conducted thorough reviews of current guidelines and deliberated on eight key issues to refine the process and improve the clarity of reporting CCTA findings. The experts engaged in both online and on-site sessions to establish a unified agreement. This document presents a summary of the ASCI-PT 2021 deliberations and offers a comprehensive consensus statement on the evaluation of coronary stenosis and coronary plaque in CCTA.
Kim Cherry,Park Chul Hwan,Kim Do Yeon,Cha Jaehyung,Lee Bae Young,Park Chan Ho,Kang Eun-Ju,Koo Hyun Jung,Kitagawa Kakuya,Cha Min Jae,Krittayaphong Rungroj,Choi Sang Il,Viswamitra Sanjaya,Ko Sung Min,Ki 대한영상의학회 2022 Korean Journal of Radiology Vol.23 No.3
Objective: This study aimed to evaluate the effect of implementing the consensus statement from the Asian Society of Cardiovascular Imaging-Practical Tutorial 2020 (ASCI-PT 2020) on the reliability of cardiac MR with late gadolinium enhancement (CMR-LGE) myocardial viability scoring between observers in the context of ischemic cardiomyopathy. Materials and Methods: A total of 17 cardiovascular imaging experts from five different countries evaluated CMR obtained in 26 patients (male:female, 23:3; median age [interquartile range], 55.5 years [50–61.8]) with ischemic cardiomyopathy. For LGE scoring, based on the 17 segments, the extent of LGE in each segment was graded using a five-point scoring system ranging from 0 to 4 before and after exposure according to the consensus statement. All scoring was performed via webbased review. Scores for slices, vascular territories, and total scores were obtained as the sum of the relevant segmental scores. Interobserver reliability for segment scores was assessed using Fleiss’ kappa, while the intraclass correlation coefficient (ICC) was used for slice score, vascular territory score, and total score. Inter-observer agreement was assessed using the limits of agreement from the mean (LoA). Results: Interobserver reliability (Fleiss’ kappa) in each segment ranged 0.242–0.662 before the consensus and increased to 0.301–0.774 after the consensus. The interobserver reliability (ICC) for each slice, each vascular territory, and total score increased after the consensus (slice, 0.728–0.805 and 0.849–0.884; vascular territory, 0.756–0.902 and 0.852–0.941; total score, 0.847 and 0.913, before and after implementing the consensus statement, respectively. Interobserver agreement in scoring also improved with the implementation of the consensus for all slices, vascular territories, and total score. The LoA for the total score narrowed from ± 10.36 points to ± 7.12 points. Conclusion: The interobserver reliability and agreement for CMR-LGE scoring for ischemic cardiomyopathy improved when following guidance from the ASCI-PT 2020 consensus statement.