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  1. No Access

    Article

    Quantification of the myocardial area at risk using coronary CT angiography and Voronoi algorithm-based myocardial segmentation

    The purpose of this study was to estimate the myocardial area at risk (MAAR) using coronary computed tomography angiography (CTA) and Voronoi algorithm-based myocardial segmentation in comparison with single-p...

    Akira Kurata, Atsushi Kono, Tsuyoshi Sakamoto, Teruhito Kido… in European Radiology (2015)

  2. No Access

    Article

    Cardiac surgery for annuloaortic ectasia and mitral regurgitation in an adult patient with dextrocardia

    We report a surgical case of dextrocardia complicated with annuloaortic ectasia (AAE) and mitral regurgitation, which induced congestive heart failure. Preoperative electrocardiography-gated multidetector-row ...

    Yuichiro Yokoyama, Harumitsu Satoh… in General Thoracic and Cardiovascular Surgery (2011)

  3. Article

    Open Access

    Functional assessment of coronary artery flow using adenosine stress dual-energy CT: a preliminary study

    We attempted to assess coronary artery flow using adenosine-stress and dual-energy mode with dual-source CT (DE-CT). Data of 18 patients with suspected coronary arteries disease who had undergone cardiac DE-CT...

    Michinobu Nagao, Teruhito Kido… in The International Journal of Cardiovascula… (2011)

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  4. No Access

    Article

    Improvement of image resolution of brain SPECT by use of the wide-angle offset acquisition method

    Cerebral SPECT images require high spatial and contrast resolution for precise evaluation of the abnormal tracer distribution in the brain. A shorter data acquisition time is preferable so that artifacts due t...

    Yasuyuki Takahashi, Noboru Oriuchi, Hiroshi Higashino… in Annals of Nuclear Medicine (2011)

  5. No Access

    Article

    Myocardial hypoenhancement in a case of acute coronary syndrome with normal coronary arteries: demonstration by 64-slice multidetector computed tomography

    A 48-year-old man presented with severe chest pain that had started 2 h before and ST elevation on the electrocardiogram. Cardiac computed tomography (CT) was performed using a 64-slice multidetector scanner (...

    Michinobu Nagao, Hiroshi Matsuoka, Hideo Kawakami… in Japanese Journal of Radiology (2010)

  6. No Access

    Article

    Peri-infarct dysfunction in post-myocardial infarction: assessment of 3-T tagged and late enhancement MRI

    To determine LV function at different distances from myocardial infarction (MI) by using 3-T tagged MRI and late gadolinium enhancement (LGE).

    Yuma Inoue, **aomei Yang, Michinobu Nagao, Hiroshi Higashino… in European Radiology (2010)

  7. No Access

    Article

    History of cardiac computed tomography: single to 320-detector row multislice computed tomography

    Since the introduction of computed tomography (CT) over 30 years ago, the challenge of imaging the beating heart has been a driving force in the innovation of cardiac CT. Imaging the anatomy and physiology of ...

    Gregory S. Hurlock, Hiroshi Higashino… in The International Journal of Cardiovascula… (2009)

  8. No Access

    Article

    Analysis of microvascularity after reperfused acute myocardial infarction using the maximum slope method of contrast-enhanced magnetic resonance imaging

    The aim of this study was to analyze microvas-cularity after reperfused acute myocardial infarction (AMI) using the maximum slope method of contrastenhanced cardiac magnetic resonance imaging (CMR).

    Michinobu Nagao, Hiroshi Higashino, Hiroshi Matsuoka, Hideo Kawakami… in Radiation Medicine (2008)

  9. No Access

    Article

    Quantitative assessment of regional left ventricular wall thickness and thickening using 16 multidetector-row computed tomography: comparison with cine magnetic resonance imaging

    The purpose of this study was to investigate the feasibility of retrospective electrocardiography-gated multidetector-row computed tomography (MDCT) in the assessment left ventricular (LV) wall thickness and t...

    Rene E. Kanza, Hiroshi Higashino, Teruhito Kido, Akira Kurata… in Radiation Medicine (2007)

  10. No Access

    Article

    Cardiac imaging using 256-detector row four-dimensional CT: preliminary clinical report

    Along with the increase of detector rows on the z-axis and a faster gantry rotation speed, the spatial and temporal resolutions of the multislice computed tomography (CT) have been improved for noninvasive cor...

    Teruhito Kido, Akira Kurata, Hiroshi Higashino, Yoshifumi Sugawara… in Radiation Medicine (2007)

  11. No Access

    Article

    Assessment of left ventricular wall motion using 16-channel multislice computed tomography: comparison with left ventriculography

    Using the raw data from coronary computed tomography (CT) angiography, multislice CT (MSCT) can be used to evaluate cardiac function. However, the accuracy of left ventricular (LV) wall motion assessment by MS...

    Toyoaki Haraikawa, Hiroshi Higashino, Yoshifumi Sugawara… in Radiation Medicine (2006)

  12. No Access

    Article

    A study on attenuation correction using Tc-99m external TCT source in Tc-99m GSA liver SPECT

    Purpose: In attenuation correction of ECT images by transmission CT (TCT) with an external99mTc y-ray source, simultaneous TCT/ECT data acquisition is difficult, when the same radionuclide such as99mTc-tetrofosmi...

    Yasuyuki Takahashi, Kenya Murase, Teruhito Mochizuki… in Annals of Nuclear Medicine (2004)

  13. No Access

    Article

    Segmented attenuation correction for myocardial SPECT

    One of the main factors contributing to the accuracy of attenuation correction for SPECT imaging using transmission computed tomography (TCT) with an external gamma-ray source is the radionuclide count. To red...

    Yasuyuki Takahashi, Kenya Murase, Teruhito Mochizuki… in Annals of Nuclear Medicine (2004)

  14. No Access

    Article

    Evaluation of the number of SPECT projections in the ordered subsets-expectation maximization image reconstruction method

    Filtered back projection (FBP) method, maximum likelihood-expectation maximization (ML-EM) method, and ordered subsets-expectation maximization (OS-EM) method are currently used for reconstruction of SPECT ima...

    Yasuyuki Takahashi, Kenya Murase, Teruhito Mochizuki… in Annals of Nuclear Medicine (2003)

  15. No Access

    Article

    Ischemic “memory image” in acute myocardial infarctio of123I-BMIPP after reperfusion therapy: A comparison with99mTc-pyrophosphate and201Tl dual-isotope SPECT

    Ischemic “memory image” is a phenomenon of123I-15-(p-iodophenyl)-3-(R,S)-methylpentadecanoic acid (BMIPP) in which an area at risk of acute myocardial infarction (AMI), could be detected as a defect in a couple o...

    Teruhito Mochizuki, Kenya Murase, Hiroshi Higashino… in Annals of Nuclear Medicine (2002)

  16. No Access

    Article

    Attenuation correction of myocardial SPECT images with X-ray CT: Effects of registration errors between X-ray CT and SPECT

    Purpose: Attenuation correction with an X-ray CT image is a new method to correct attenuation on SPECT imaging, but the effect of the registration errors between CT and SPECT images is unclear. I...

    Yasuyuki Takahashi, Kenya Murase, Hiroshi Higashino… in Annals of Nuclear Medicine (2002)

  17. No Access

    Article

    SPECT imaging with off-set detector system: Comparison of sampling angles 2, 4 and 6 degrees

    Purpose: We evaluated an off set reconstruction method for single photon emission computed tomography (SPECT), and compared it with the conventional on set reconstruction method, using sampling a...

    Yasuyuki Takahashi, Kenya Murase, Hiroshi Higashino… in Annals of Nuclear Medicine (2002)

  18. No Access

    Article

    Receiver operating characteristic (ROC) analysis of images reconstructed with iterative expectation maximization algorithms

    The quality of images reconstructed by means of the maximum likelihood-expectation maximization (ML-EM) and ordered subset (OS)-EM algorithms, was examined with parameters such as the number of iterations and ...

    Yasuyuki Takahashi, Kenya Murase, Hiroshi Higashino… in Annals of Nuclear Medicine (2001)

  19. No Access

    Article

    Twenty-four-hour Tl-201 delayed scan underestimates myocardial viability in patients with acute myocardial infarction after percutaneous transluminal coronary angioplasty

    Myocardial viability in area at risk of acute myocardial infarction (AMI) after reperfusion therapy may be underestimated by the 24-hour images due to reverse redistribution (r-RD).

    Teruhito Mochizuki, Kenya Murase, Yoshifumi Sugawara… in Annals of Nuclear Medicine (2001)

  20. No Access

    Article

    Quantitative analysis of myocardial ischemia by technetium-99m sestamibi exercise scintigraphy: A new method for change rate map**

    In order to quantitatively assess the extent and severity of myocardial ischemia by Tc-99m sestamibi exercise myocardial scintigraphy, we developed a new method of change rate (CR) map** and examined its eff...

    Shigeru Nakata, Hiroshi Higashino, Taishi Kuwahara… in Annals of Nuclear Medicine (1997)

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