Guideline for Cardiovascular Magnetic Resonance Imaging from the Korean Society of Cardiovascular Imaging—Part 1: Standardized Protocol

Jo, Yeseul; Kim, Jeong-Jae; Park, Chul Hwan; Lee, Jae Woo; Hur, Jee Hye; Yang, Dong Hyun; Lee, Bae Young; Im, Dong Jin; Hong, Su Jin; Kim, Eun Young; Park, Eun Ah; Kim, Pan Ki; Yong, Hwan Seok

doi:10.3348/kjr.2019.0398

Cited by 32 publications

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“…The CMR acquisition parameters for cine imaging and T1 mapping are described in Supplementary Material. To assess left ventricular (LV) myocardial function and mass, short-axis images of the LV were acquired using a cine balanced steady-state free precession (bSSFP) sequence [ 16 ]. Three short-axis Modified Look-Locker Inversion-recovery (MOLLI) images at the base, mid-cavity, and apex were acquired for native T1 mapping [ 16 , 17 ].…”

Section: Methodsmentioning

confidence: 99%

“…To assess left ventricular (LV) myocardial function and mass, short-axis images of the LV were acquired using a cine balanced steady-state free precession (bSSFP) sequence [ 16 ]. Three short-axis Modified Look-Locker Inversion-recovery (MOLLI) images at the base, mid-cavity, and apex were acquired for native T1 mapping [ 16 , 17 ]. Then, a total dose of 0.1 mmol/kg gadolinium agent (Uniray, gadoterate meglumine, Dongkook Pharmaceutical Co., Ltd.) was injected.…”

Section: Methodsmentioning

confidence: 99%

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Phantom-based correction for standardization of myocardial native T1 and extracellular volume fraction in healthy subjects at 3-Tesla cardiac magnetic resonance imaging

et al. 2022

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Objectives To investigate the effect of the phantom-based correction method for standardizing myocardial native T1 and extracellular volume fraction (ECV) in healthy subjects. Methods Seventy-one healthy asymptomatic adult (≥ 20 years) volunteers of five different age groups (34 men and 37 women, 45.5 ± 15.5 years) were prospectively enrolled in three academic hospitals. Cardiac MRI including Modified Look - Locker Inversion recovery T1 mapping sequence was performed using a 3-Tesla system with a different type of scanner for each hospital. Native T1 and ECV were measured in the short-axis T1 map and analyzed for mean values of the 16 entire segments. The myocardial T1 value of each subject was corrected based on the site-specific equation derived from the T1 Mapping and ECV Standardization phantom. The global native T1 and ECV were compared between institutions before and after phantom-based correction, and the variation in native T1 and ECV among institutions was assessed using a coefficient of variation (CoV). Results The global native T1 value significantly differed between the institutions (1198.7 ± 32.1 ms, institution A; 1217.7 ± 39.9 ms, institution B; 1232.7 ± 31.1 ms, institution C; p = 0.002), but the mean ECV did not (26.6–27.5%, p = 0.355). After phantom-based correction, the global native T1 and ECV were 1289.7 ± 32.4 ms and 25.0 ± 2.7%, respectively, and CoV for native T1 between the three institutions decreased from 3.0 to 2.5%. The corrected native T1 value did not significantly differ between institutions (1284.5 ± 31.5 ms, institution A; 1296.5 ± 39.1 ms, institution B; 1291.3 ± 29.3 ms, institution C; p = 0.440), and neither did the ECV (24.4–25.9%, p = 0.078). Conclusions The phantom-based correction method can provide standardized reference T1 values in healthy subjects. Key Points • After phantom-based correction, the global native T1 of 16 entire myocardial segments on 3-T cardiac MRI is 1289.4 ± 32.4 ms, and the extracellular volume fraction was 25.0 ± 2.7% for healthy subjects. • After phantom - based correction was applied, the differences in the global native T1 among institutions became insignificant, and the CoV also decreased from 3.0 to 2.5%.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Phantom-based correction for standardization of myocardial native T1 and extracellular volume fraction in healthy subjects at 3-Tesla cardiac magnetic resonance imaging

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“…각 영상기기의 장점과 영상 소견별 기능은 다음과 같이 정리하였다( Tables 1 , 2 ). 최근 가이드라인에 의하면 심막 질환은 T1과 T2 영상, T1 mapping, 좌심실과 우심실 동영상(cine imaging), 지연 조연증강 영상이 적절한 검사이며 혈류영상(velocity encoding gradient echo image, VENC)이나 관류영상(perfusion imaging)은 그 효과가 확실치 않으며 심부하 검사는 적절치 않은 검사라고 하였다( 7 ). PET-CT는 종양이나 감염의 경우 강한 fluorodeoxyglucose (이하 FDG) 섭취를 보이나 감염이나 종양이 아닌 염증의 경우, FDG 섭취가 약간 증가하거나 거의 증가하지 않아 감별에 도움이 된다( Fig.…”

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Noninvasive Imaging of Pericardium

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2020

J Korean Soc Radiol

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The clinical manifestation of pericardial disease is similar to that of coronary artery disease and aortic disease. Therefore, a timely and accurate diagnosis is necessary. The pericardium is a 2-layered membrane that envelops the heart and great vessels, and there are numerous anatomic variations and pathologic conditions. Large or unusually located pericardial recesses can be easily mistaken for abnormal findings. Additionally, primary pericardial diseases resulting from infections, tumors, and injuries are possible; further, diseases can quickly spread along the pericardium. Echocardiography is generally the first imaging tool used to evaluate the pericardium. However, it has limited windows and poor resolution. Besides, the evaluation of postoperative echocardiography is sometimes limited. Currently, CT and MR imaging are useful for evaluating pericardial diseases. Detailed knowledge of the pericardium is important for interpreting the images and clinical results.

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“…Although accurate and consistent evaluation of CMR-LGE is required from the perspective of viability, semiquantitative/visual scoring reflecting the extent of myocardial scarring and transmural involvement has been accepted because full quantification of CMR could be burdensome for daily use. However, the actual process of CMR-LGE evaluation for both semiquantitative/visual scoring and full quantitative scoring might be complicated and ambiguous, despite well-established guidelines for LGE evaluation [ 9 10 11 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…The interpretation of CMR-LGE is a complex and intricate process, although several well-written and comprehensive guidelines are available [ 9 10 11 12 ]. According to these guidelines, visual interpretation and semi-quantitative scoring consist of various steps, including determining the presence of CMR-LGE, describing the location of CMR-LGE, evaluating the extent of CMR-LGE, and semi-quantitative scoring.…”

Section: Introductionmentioning

confidence: 99%

Semi-Quantitative Scoring of Late Gadolinium Enhancement of the Left Ventricle in Patients with Ischemic Cardiomyopathy: Improving Interobserver Reliability and Agreement Using Consensus Guidance from the Asian Society of Cardiovascular Imaging-Practical Tutorial (ASCI-PT) 2020

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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 web-based 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.

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Guideline for Cardiovascular Magnetic Resonance Imaging from the Korean Society of Cardiovascular Imaging—Part 1: Standardized Protocol

Cited by 32 publications

References 59 publications

Phantom-based correction for standardization of myocardial native T1 and extracellular volume fraction in healthy subjects at 3-Tesla cardiac magnetic resonance imaging

Phantom-based correction for standardization of myocardial native T1 and extracellular volume fraction in healthy subjects at 3-Tesla cardiac magnetic resonance imaging

Noninvasive Imaging of Pericardium

Semi-Quantitative Scoring of Late Gadolinium Enhancement of the Left Ventricle in Patients with Ischemic Cardiomyopathy: Improving Interobserver Reliability and Agreement Using Consensus Guidance from the Asian Society of Cardiovascular Imaging-Practical Tutorial (ASCI-PT) 2020

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