Results 181 to 190 of about 16,119 (209)

Validation of an Optimal Analysis Method and Reproducibility to Calculate the Heart-to-Mediastinum Ratio and Washout Rate in the Iodine-123-labeled Metaiodobenzylguanidine Myocardial Scintigraphy

Japanese Journal of Radiological Technology, 2014
The aim of this study was to investigate an appropriate analysis method and multicenter reproducibility of heart-to-mediastinum ratio (H/M) and washout rate (WR) in iodine-123-labeled metaiodobenzylguanidine (123I-MIBG) myocardial scintigraphy with a phantom.We evaluated the optimal region of interest (ROI) setting method about the mediastinum and ...
Hideo Onishi
exaly   +4 more sources

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Abdominal obesity, and not general obesity, is associated with a lower 123I MIBG heart-to-mediastinum ratio in heart failure patients with preserved ejection fraction

European Journal of Nuclear Medicine and Molecular Imaging, 2021
The relationship between general obesity or abdominal obesity (abdominal circumference of ≥85 cm in men and ≥ 90 cm in women) and the heart-to-mediastinum ratio (HMR), a measure of cardiac sympathetic innervation, on cardiac iodine-123-metaiodobenzylguanidine scintigraphy (MIBG) in patients with heart failure with preserved ejection fraction (HFpEF ...
Akihiro Sunaga, Shungo Hikoso, Hiroyuki Kurakami   +2 more
exaly   +3 more sources

Semi-automated algorithm for calculating heart-to-mediastinum ratio in cardiac Iodine-123 MIBG imaging

Journal of Nuclear Cardiology, 2011
We have developed novel software for semi-automatically measuring heart-to-mediastinum (H/M) ratio in cardiac Iodine-123 (¹²³I)-labeled meta-iodobenzylguanidine (MIBG) imaging. Our aim is to improve the reproducibility of the H/M ratio using the semi-automated method as opposed to the manual method.The software algorithm automatically determined the ...
Koichi, Okuda, Kenichi, Nakajima, Tetsuo, Hosoya, Takehiro, Ishikawa, Takahiro, Konishi, Kosuke, Matsubara, Shinro, Matsuo, Seigo, Kinuya   +7 more
openaire   +2 more sources

Impact of a predefined mediastinal ROI on inter-observer variability of planar ¹²³I-MIBG heart-to-mediastinum ratio.

Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology, 2014
Purpose of this study was to assess the impact of mediastinal region of interest (ROI) definition on intra- and inter-observer variability in relation to collimator type.Thirty-five subjects with CHF (80% men, mean age 66 ± 9 years, NYHA 2.4 ± 0.5, LVEF 29 ± 8.4%) were enrolled. 15 minutes and 4 hours post-injection (p.i.) of (123)I-MIBG, planar images
Verschure, Derk O., Bongers, Vivian, Hagen, Petronella J., Somsen, G. Aernout, van Eck-Smit, Berthe L. F., Verberne, Hein J.   +5 more
openaire   +2 more sources

The utility of heart-to-mediastinum ratio using a planar image created from IQ-SPECT with Iodine-123 meta-iodobenzylguanidine

Journal of Nuclear Cardiology, 2021
123I-labeled meta-iodobenzylguanidine (MIBG) has used a planar image to measure the heart-to-mediastinum ratio (HMR). However, planar images are not available from IQ-SPECT with SMARTZOOM collimator due to its multi-focal collimation. Since we created the planar-equivalent (IQ-planar) images by adding all slices of the IQ-SPECT coronal image.
Takayuki, Shibutani, Kenichi, Nakajima, Hiroto, Yoneyama, Takahiro, Konishi, Koichi, Okuda, Masahisa, Onoguchi, Seigo, Kinuya   +6 more
openaire   +2 more sources

Correction of iodine-123-labeled meta-iodobenzylguanidine uptake with multi-window methods for standardization of the heart-to-mediastinum ratio

Journal of Nuclear Cardiology, 2007
To overcome differences in the choice of collimator for an iodine-123 ((123)I)-labeled meta-iodobenzylguanidine (MIBG) heart-to-mediastinum (H/M) ratio, we examined multi-window correction methods with (123)I dual-window (IDW) and triple-energy window (TEW) acquisition.Standard phantoms, which consisted of the heart, mediastinum, lung, and liver, were ...
Kenichi, Nakajima, Kosuke, Matsubara, Takehiro, Ishikawa, Nobutoku, Motomura, Ryo, Maeda, Nasima, Akhter, Koichi, Okuda, Junichi, Taki, Seigo, Kinuya   +8 more
openaire   +2 more sources

An improved method for estimating the heart-to-mediastinum ratio from cardiac sympathetic nerve imaging with low-energy high-resolution collimators

Journal of Nuclear Cardiology, 2014
Septal penetration causes underestimation of the heart-to-mediastinum (H/M) ratio in cardiac (123)I-metaiodobenzylguanidine (MIBG) imaging with a low-energy high-resolution (LEHR) collimator. We aimed to improve the method of estimating the H/M ratios using the LEHR collimator.4 hours after (123)I-MIBG injection, 40 patients were imaged successively ...
Yusuke, Inoue, Yutaka, Abe, Yuji, Asano, Kei, Kikuchi, Keiji, Matsunaga, Takahiro, Iizuka, Kazutoshi, Nishiyama   +6 more
openaire   +2 more sources

Semi-automated measurements of heart-to-mediastinum ratio on¹²³I-MIBG myocardial scintigrams by using image fusion method with chest X-ray images

SPIE Proceedings, 2015
MIBG (iodine-123-meta-iodobenzylguanidine) is a radioactive medicine that is used to help diagnose not only myocardial diseases but also Parkinson’s diseases (PD) and dementia with Lewy Bodies (DLB). The difficulty of the segmentation around the myocardium often reduces the consistency of measurement results.
Ryosuke Kawai, Takeshi Hara, Tetsuro Katafuchi, Tadahiko Ishihara, Xiangrong Zhou, Chisako Muramatsu, Yoshiteru Abe, Hiroshi Fujita 0001   +7 more
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False Heart-to-Mediastinum Ratio of I-123 Metaiodobenzylguanidine due to Right Ventricular Attenuation

Clinical Nuclear Medicine, 2011
María Nazarena, Pizzi, Mónica, Sabaté-Fernández, Gustavo, de León, Santiago, Aguadé-Bruix, Jaume, Candell-Riera   +4 more
openaire   +2 more sources

123I-MIBG Cardiac Scintigraphy and Heart/Mediastinum Ratio in Neurodegenerative Disorders: Is Delayed Scan Really Necessary?

Current Radiopharmaceuticals, 2022
Susanna Maria F Nuvoli, Barbara Palumbo, Andrea Marongiu   +2 more
exaly