Results 11 to 20 of about 16,119 (209)

Machine learning-based prediction of conversion coefficients for I-123 metaiodobenzylguanidine heart-to-mediastinum ratio. [PDF]

J Nucl Cardiol, 2023
We developed a method of standardizing the heart-to-mediastinal ratio in 123I-labeled meta-iodobenzylguanidine (MIBG) images using a conversion coefficient derived from a dedicated phantom. This study aimed to create a machine-learning (ML) model to estimate conversion coefficients without using a phantom.210 Monte Carlo (MC) simulations of 123I-MIBG ...
Okuda K, Nakajima K, Kitamura C, Ljungberg M, Hosoya T, Kirihara Y, Hashimoto M.   +6 more
europepmc   +3 more sources

Comparison of Taiwanese and European Calibration Factors for Heart-to-Mediastinum Ratio in Multicenter ¹²³I-mIBG Phantom Studies. [PDF]

Ann Nucl Cardiol, 2023
Background: Cross-calibration of 123I-labeled meta-iodobenzylguanidine (mIBG) myocardial-derived indices is essential to extrapolate findings from several clinical centers. Here, we conducted a phantom study to generate conversion coefficients for the calibration of heart-to-mediastinum ratios and compare them between Taiwan and Europe.
Okuda K, Nakajima K, Hung GU, Wu HT, Verschure DO, Verberne HJ, Kitamura C.   +6 more
europepmc   +3 more sources

The impact of acquisition time of planar cardiac (123)I-MIBG imaging on the late heart to mediastinum ratio. [PDF]

Eur J Nucl Med Mol Imaging, 2016
The aim of this study was to investigate whether performing the late cardiac (123)I-metaiodobenzylguanidine (MIBG) scan earlier than 4 h post-injection (p.i.) has relevant impact on the late heart to mediastinum ratio (H/M ratio) in patients with heart failure (HF).Forty-nine patients with HF (median left ventricular ejection fraction of 31 %, 51 ...
Dimitriu-Leen AC, Gimelli A, Al Younis I, Veltman CE, Verberne HJ, Wolterbeek R, Zandbergen-Harlaar S, Bax JJ, Scholte AJHA.   +8 more
europepmc   +6 more sources

Cross calibration of ¹²³I-meta-iodobenzylguanidine heart-to-mediastinum ratio with D-SPECT planogram and Anger camera. [PDF]

Ann Nucl Med, 2017
Cardiac 123I-meta-iodobenzylguanidine (MIBG) uptake is quantified using the heart-to-mediastinum ratio (HMR) with an Anger camera. The relationship between HMR determined using D-SPECT with a cadmium-zinc-telluride detector and an Anger camera is not fully understood.
Nakajima K, Okuda K, Yokoyama K, Yoneyama T, Tsuji S, Oda H, Yoshita M, Kubota K.   +7 more
europepmc   +4 more sources

Phantom-Based Standardization Method for ¹²³I-metaiodobenzylguanidine Heart-to-Mediastinum Ratio Validated by D-SPECT Versus Anger Camera. [PDF]

Ann Nucl Cardiol, 2023
Background: The 123I-metaiodobenzylguanidine heart-to-mediastinum ratios (HMRs) have been standardized between D-SPECT and Anger cameras in a small patient cohort using a phantom-based conversion method. This study aimed to determine the validity of this method and compare the diagnostic performance of the two cameras in a larger patient cohort ...
Yamashita S, Nakajima K, Okuda K, Yamamoto H, Shibutani T, Yoneyama T, Tsuji S, Yokoyama K.   +7 more
europepmc   +3 more sources

Is ¹²³I-metaiodobenzylguanidine heart-to-mediastinum ratio dependent on age? From Japanese Society of Nuclear Medicine normal database. [PDF]

Ann Nucl Med, 2018
Heart-to-mediastinum ratios (HMRs) of 123I-metaiodobenzylguanidine (MIBG) have usually been applied to prognostic evaluations of heart failure and Lewy body disease. However, whether these ratios depend on patient age has not yet been clarified using normal databases.We analyzed 62 patients (average age 57 ± 19 years, male 45%) derived from a normal ...
Nakajima K, Okuda K, Matsuo S, Wakabayashi H, Kinuya S.   +4 more
europepmc   +4 more sources

Interobserver variability of heart-to-mediastinum ratio in I-123 MIBG sympathetic imaging. [PDF]

Curr Cardiol Rep, 2012
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Bulten BF, van der Palen RL, van Laarhoven HW, Kapusta L, Mavinkurve-Groothuis AM, de Geus-Oei LF.   +5 more
europepmc   +8 more sources

Accuracy and cutoff values of delayed heart to mediastinum ratio with (123)I-metaiodobenzylguanidine cardiac scintigraphy for Lewy body disease diagnoses. [PDF]

BMC Neurol, 2015
Different studies have found diminished cardiac metaiodobenzylguanidine (MIBG) uptake in Lewy body (LB) related conditions (Parkinson's disease (PD) and Lewy body dementia (LBD)). However, delayed heart/mediastinum (d-H/M) ratio diagnostic cutoff points are debated in parkinsonian syndromes.We performed a monocentric retrospective analysis on 62 ...
Lamotte G, Morello R, Lebasnier A, Agostini D, Defer GL.   +4 more
europepmc   +5 more sources

Multicenter cross-calibration of I-123 metaiodobenzylguanidine heart-to-mediastinum ratios to overcome camera-collimator variations [PDF]

Journal of Nuclear Cardiology, 2014
The heart-to-mediastinum ratio (HMR) of (123)I-metaiodobenzylguanidine (MIBG) showed variations among institutions and needs to be standardized among various scinticamera-collimator combinations.A total of 225 phantom experiments were performed in 84 institutions to calculate cross-calibration coefficients of HMR. Based on phantom studies, a conversion
Nakajima, Kenichi, Okuda, Koichi, Yoshimura, Mana, Matsuo, Shinro, Wakabayashi, Hiroshi, Imanishi, Yasuhiro, Kinuya, Seigo   +6 more
core   +4 more sources

The “gray zone” for the heart to mediastinum MIBG uptake ratio [PDF]

Journal of Nuclear Cardiology, 2014
Increased myocardial sympathetic activity is an important feature of heart failure (HF) and is associated with progressive myocardial remodeling, worsening in left ventricular (LV) function, and poor outcome. The AdreView Myocardial Imaging for Risk Evaluation in Heart Failure (ADMIRE-HF) study prospectively evaluated the value of quantitation of ...
Petretta Mario, Pellegrino Teresa, Cuocolo Alberto   +2 more
openaire   +4 more sources