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Konta N, Shibukawa S, Horie T, Niwa T, Obara M, Okazaki T, Kawamura Y, Miyati T. Turbo spin-echo-based enhanced acceleration-selective arterial spin labeling without electrocardiography or peripheral pulse unit triggering and contrast enhancement for lower extremity MRA. Magn Reson Imaging 2024; 110:43-50. [PMID: 38604346 DOI: 10.1016/j.mri.2024.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/28/2024] [Accepted: 04/07/2024] [Indexed: 04/13/2024]
Abstract
PURPOSE Lower extremity magnetic resonance angiography (MRA) without electrocardiography (ECG) or peripheral pulse unit (PPU) triggering and contrast enhancement is beneficial for diagnosing peripheral arterial disease (PAD) while avoiding synchronization failure and nephrogenic systemic fibrosis. This study aimed to compare the diagnostic performance of turbo spin-echo-based enhanced acceleration-selective arterial spin labeling (eAccASL) (TSE-Acc) of the lower extremities with that of turbo field-echo-based eAccASL (TFE-Acc) and triggered angiography non-contrast enhanced (TRANCE). METHODS Nine healthy volunteers and a patient with PAD were examined on a 3.0 Tesla magnetic resonance imaging (MRI) system. The artery-to-muscle signal intensity ratio (SIR) and contrast-to-noise ratio (CNR) were calculated. The arterial visibility (1: poor, 4: excellent) and artifact contamination (1: severe, 4: no) were independently assessed by two radiologists. Phase-contrast MRI and digital subtraction angiography were referenced in a patient with PAD. Friedman's test and a post-hoc test according to the Bonferroni-adjusted Wilcoxon signed-rank test were used for the SIR, CNR, and visual assessment. p < 0.05 was considered statistically significant. RESULTS No significant differences in nearly all the SIRs were observed among the three MRA methods. Higher CNRs were observed with TSE-Acc than those with TFE-Acc (anterior tibial artery, p = 0.014; peroneal artery, p = 0.029; and posterior tibial artery, p = 0.014) in distal arterial segments; however, no significant differences were observed upon comparison with TRANCE (all p > 0.05). The arterial visibility scores exhibited similar trends as the CNRs. The artifact contamination scores with TSE-Acc were significantly lower (but within an acceptable level) compared to those with TFE-Acc. In the patient with PAD, the sluggish peripheral arteries were better visualized using TSE-Acc than those using TFE-Acc, and the collateral and stenosis arteries were better visualized using TSE-Acc than those using TRANCE. CONCLUSION Peripheral arterial visualization was better with TSE-Acc than that with TFE-Acc in lower extremity MRA without ECG or PPU triggering and contrast enhancement, which was comparable with TRANCE as the reference standard. Furthermore, TSE-Acc may propose satisfactory diagnostic performance for diagnosing PAD in patients with arrhythmia and chronic kidney disease.
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Affiliation(s)
- Natsuo Konta
- Department of Radiology, Tokai University Hospital, Kanagawa, Japan; Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Ishikawa, Japan.
| | - Shuhei Shibukawa
- Department of Radiological Technology, Juntendo University, Tokyo, Japan
| | - Tomohiko Horie
- Department of Radiology, Tokai University Hospital, Kanagawa, Japan
| | - Tetsu Niwa
- Department of Diagnostic Radiology, Tokai University School of Medicine, Kanagawa, Japan
| | | | - Takashi Okazaki
- Department of Diagnostic Radiology, Tokai University School of Medicine, Kanagawa, Japan
| | - Yui Kawamura
- Department of Diagnostic Radiology, Tokai University School of Medicine, Kanagawa, Japan
| | - Toshiaki Miyati
- Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Ishikawa, Japan
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Shibukawa S, Kan H, Honda S, Wada M, Tarumi R, Tsugawa S, Tobari Y, Maikusa N, Mimura M, Uchida H, Nakamura Y, Nakajima S, Noda Y, Koike S. Alterations in subcortical magnetic susceptibility and disease-specific relationship with brain volume in major depressive disorder and schizophrenia. Transl Psychiatry 2024; 14:164. [PMID: 38531856 DOI: 10.1038/s41398-024-02862-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 03/05/2024] [Accepted: 03/07/2024] [Indexed: 03/28/2024] Open
Abstract
Quantitative susceptibility mapping is a magnetic resonance imaging technique that measures brain tissues' magnetic susceptibility, including iron deposition and myelination. This study examines the relationship between subcortical volume and magnetic susceptibility and determines specific differences in these measures among patients with major depressive disorder (MDD), patients with schizophrenia, and healthy controls (HCs). This was a cross-sectional study. Sex- and age- matched patients with MDD (n = 49), patients with schizophrenia (n = 24), and HCs (n = 50) were included. Magnetic resonance imaging was conducted using quantitative susceptibility mapping and T1-weighted imaging to measure subcortical susceptibility and volume. The acquired brain measurements were compared among groups using analyses of variance and post hoc comparisons. Finally, a general linear model examined the susceptibility-volume relationship. Significant group-level differences were found in the magnetic susceptibility of the nucleus accumbens and amygdala (p = 0.045). Post-hoc analyses indicated that the magnetic susceptibility of the nucleus accumbens and amygdala for the MDD group was significantly higher than that for the HC group (p = 0.0054, p = 0.0065, respectively). However, no significant differences in subcortical volume were found between the groups. The general linear model indicated a significant interaction between group and volume for the nucleus accumbens in MDD group but not schizophrenia or HC groups. This study showed susceptibility alterations in the nucleus accumbens and amygdala in MDD patients. A significant relationship was observed between subcortical susceptibility and volume in the MDD group's nucleus accumbens, which indicated abnormalities in myelination and the dopaminergic system related to iron deposition.
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Affiliation(s)
- Shuhei Shibukawa
- Center for Evolutionary Cognitive Sciences, Graduate School of Art and Sciences, The University of Tokyo, Tokyo, Japan
- Faculty of Health Science, Department of Radiological Technology, Juntendo University, Tokyo, Japan
- Department of Radiology, Tokyo Medical University, Tokyo, Japan
| | - Hirohito Kan
- Department of Integrated Health Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Shiori Honda
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Masataka Wada
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Ryosuke Tarumi
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Sakiko Tsugawa
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Yui Tobari
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Norihide Maikusa
- Center for Evolutionary Cognitive Sciences, Graduate School of Art and Sciences, The University of Tokyo, Tokyo, Japan
| | - Masaru Mimura
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Hiroyuki Uchida
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Yuko Nakamura
- Center for Evolutionary Cognitive Sciences, Graduate School of Art and Sciences, The University of Tokyo, Tokyo, Japan
- University of Tokyo Institute for Diversity and Adaptation of Human Mind, The University of Tokyo, Tokyo, Japan
| | - Shinichiro Nakajima
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Yoshihiro Noda
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Shinsuke Koike
- Center for Evolutionary Cognitive Sciences, Graduate School of Art and Sciences, The University of Tokyo, Tokyo, Japan.
- University of Tokyo Institute for Diversity and Adaptation of Human Mind, The University of Tokyo, Tokyo, Japan.
- The International Research Center for Neurointelligence, University of Tokyo Institutes for Advanced Study (UTIAS), Tokyo, Japan.
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Katagiri N, Saho T, Shibukawa S, Tanabe S, Yamaguchi T. Predicting interindividual response to theta burst stimulation in the lower limb motor cortex using machine learning. Front Neurosci 2024; 18:1363860. [PMID: 38572150 PMCID: PMC10987705 DOI: 10.3389/fnins.2024.1363860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Accepted: 03/08/2024] [Indexed: 04/05/2024] Open
Abstract
Using theta burst stimulation (TBS) to induce neural plasticity has played an important role in improving the treatment of neurological disorders. However, the variability of TBS-induced synaptic plasticity in the primary motor cortex prevents its clinical application. Thus, factors associated with this variability should be explored to enable the creation of a predictive model. Statistical approaches, such as regression analysis, have been used to predict the effects of TBS. Machine learning may potentially uncover previously unexplored predictive factors due to its increased capacity for capturing nonlinear changes. In this study, we used our prior dataset (Katagiri et al., 2020) to determine the factors that predict variability in TBS-induced synaptic plasticity in the lower limb motor cortex for both intermittent (iTBS) and continuous (cTBS) TBS using machine learning. Validation of the created model showed an area under the curve (AUC) of 0.85 and 0.69 and positive predictive values of 77.7 and 70.0% for iTBS and cTBS, respectively; the negative predictive value was 75.5% for both patterns. Additionally, the accuracy was 0.76 and 0.72, precision was 0.82 and 0.67, recall was 0.82 and 0.67, and F1 scores were 0.82 and 0.67 for iTBS and cTBS, respectively. The most important predictor of iTBS was the motor evoked potential amplitude, whereas it was the intracortical facilitation for cTBS. Our results provide additional insights into the prediction of the effects of TBS variability according to baseline neurophysiological factors.
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Affiliation(s)
- Natsuki Katagiri
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Rehabilitation Medicine, Tokyo Bay Rehabilitation Hospital, Chiba, Japan
| | - Tatsunori Saho
- Department of Radiological Technology, Kokura Memorial Hospital, Fukuoka, Japan
| | - Shuhei Shibukawa
- Department of Radiological Technology, Faculty of Health Science, Juntendo University, Tokyo, Japan
- Center for Evolutionary Cognitive Sciences, Graduate School of Art and Sciences, University of Tokyo, Tokyo, Japan
- Department of Radiology, Tokyo Medical University, Tokyo, Japan
| | - Shigeo Tanabe
- Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, Aichi, Japan
| | - Tomofumi Yamaguchi
- Department of Physical Therapy, Faculty of Health Science, Juntendo University, Tokyo, Japan
- Department of Physical Therapy, Yamagata Prefectural University of Health Sciences, Yamagata, Japan
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Shibukawa S, Konta N, Niwa T, Miyati T, Yonemochi T, Yoshimaru D, Horie T, Kuroda K, Sorimachi T. Temperature measurement of intracranial cerebrospinal fluid using diffusion tensor imaging after revascularization surgery in Moyamoya disease. Magn Reson Imaging 2023; 99:1-6. [PMID: 36608908 DOI: 10.1016/j.mri.2022.12.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 12/31/2022] [Indexed: 01/05/2023]
Abstract
OBJECTIVE Brain temperature monitoring using a catheter thermometer has been reported to be a useful technique to predict prognosis in neurosurgery. To investigate the possibility of measuring intracranial cerebrospinal fluid temperature for postoperative monitoring in patients with Moyamoya disease (MMD) after bypass surgery. MATERIALS AND METHODS This study evaluated fifteen patients with MMD who were indicated for bypass surgery. Diffusion tensor imaging for brain thermometry were performed on a 1.5-T MR scanner. Intracranial cerebrospinal fluid temperature with/without considering the fractional anisotropy component, body temperature, C-reactive protein levels, white blood cell count, and cerebral blood flow measured by 123I-IMP single-photon emission computed tomography were obtained before surgery and 1-3 days after surgery. Pixel values considered to be signal outliers in fractional anisotropy processing were defined as cerebrospinal fluid noise index and calculated. Wilcoxon signed-rank test and effect size were performed to compare the changes before and after revascularization. Spearman's rho correlation coefficient was used to analyze the correlations between each parameter. Statistical significance was defined as p < 0.05. RESULTS All parameter values became significantly higher compared to those measured before revascularization (p < 0.01 in all cases). The effect sizes were largest for the cerebrospinal fluid temperature with fractional anisotropy processing and for C-reactive protein levels (Rank-biserial correlation = 1.0). The cerebrospinal fluid noise index and cerebrospinal fluid temperatures with fractional anisotropy processing (r = 0.84, p < 0.0001) or without fractional anisotropy processing (r = 0.95, p < 0.0001) showed highly significant positive correlations. Although no significant correlation was observed, cerebrospinal fluid temperatures with fractional anisotropy had small or moderately positive correlations with cerebral blood flow, body temperature, C-reactive protein levels, and white blood cell count (r = 0.37, 0.42, 0.41, and 0.44, respectively; p > 0.05). CONCLUSION Our findings suggest the possibility of postoperative monitoring for MMD patients by measuring intracranial cerebrospinal fluid temperature with fractional anisotropy processing. Intracranial cerebrospinal fluid temperature might be considered as combined response since cerebrospinal fluid, body temperature, and inflammation are equally correlated.
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Affiliation(s)
- Shuhei Shibukawa
- Department of Radiological Technology, Faculty of Health Science, Juntendo University, Bunkyo-Ku, Tokyo, Japan; Department of Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan; Center for Evolutionary Cognitive Sciences, Graduate School of Art and Sciences, The University of Tokyo, Meguro-ku, Tokyo, Japan; Department of Radiology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan.
| | - Natsuo Konta
- Department of Radiology, Tokai University Hospital, Isehara, Kanagawa, Japan
| | - Tetsu Niwa
- Department of Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Tosiaki Miyati
- Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Takuya Yonemochi
- Department of Neurosurgery, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Daisuke Yoshimaru
- Department of Radiology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan; Jikei University School of Medicine, Division of Regenerative Medicine
| | - Tomohiko Horie
- Department of Radiology, Tokai University Hospital, Isehara, Kanagawa, Japan
| | - Kagayaki Kuroda
- Course of Electrical and Electronic Engineering, Graduate School of Engineering, Tokai University
| | - Takatoshi Sorimachi
- Department of Neurosurgery, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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Sun X, Niwa T, Okazaki T, Kameda S, Shibukawa S, Horie T, Kazama T, Uchiyama A, Hashimoto J. Automatic detection of punctate white matter lesions in infants using deep learning of composite images from two cases. Sci Rep 2023; 13:4426. [PMID: 36932141 PMCID: PMC10023755 DOI: 10.1038/s41598-023-31403-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 03/11/2023] [Indexed: 03/19/2023] Open
Abstract
Punctate white matter lesions (PWMLs) in infants may be related to neurodevelopmental outcomes based on the location or number of lesions. This study aimed to assess the automatic detectability of PWMLs in infants on deep learning using composite images created from several cases. To create the initial composite images, magnetic resonance (MR) images of two infants with the most PWMLs were used; their PWMLs were extracted and pasted onto MR images of infants without abnormality, creating many composite PWML images. Deep learning models based on a convolutional neural network, You Only Look Once v3 (YOLOv3), were constructed using the training set of 600, 1200, 2400, and 3600 composite images. As a result, a threshold of detection probability of 20% and 30% for all deep learning model sets yielded a relatively high sensitivity for automatic PWML detection (0.908-0.957). Although relatively high false-positive detections occurred with the lower threshold of detection probability, primarily, in the partial volume of the cerebral cortex (≥ 85.8%), those can be easily distinguished from the white matter lesions. Relatively highly sensitive automatic detection of PWMLs was achieved by creating composite images from two cases using deep learning.
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Affiliation(s)
- Xuyang Sun
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuka, Isehara, 259-1193, Japan
| | - Tetsu Niwa
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuka, Isehara, 259-1193, Japan.
| | - Takashi Okazaki
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuka, Isehara, 259-1193, Japan
| | - Sadanori Kameda
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuka, Isehara, 259-1193, Japan
| | - Shuhei Shibukawa
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuka, Isehara, 259-1193, Japan
- Department of Radiological Technology, Faculty of Health Science, Juntendo University, Bunkyo-Ku, Tokyo, Japan
| | - Tomohiko Horie
- Department of Radiology, Tokai University Hospital, Isehara, Japan
| | - Toshiki Kazama
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuka, Isehara, 259-1193, Japan
| | - Atsushi Uchiyama
- Department of Pediatrics, Tokai University School of Medicine, Isehara, Japan
| | - Jun Hashimoto
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuka, Isehara, 259-1193, Japan
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Hayashi T, Yano S, Shibukawa S, Kojima S, Ito T, Oba H, Kondo H, Yamamoto A, Okamoto T. Impact of arm position on vertebral bone marrow proton density fat fraction in chemical-shift-encoded magnetic resonance imaging: a preliminary study. Quant Imaging Med Surg 2022; 12:5263-5270. [PMID: 36330194 PMCID: PMC9622447 DOI: 10.21037/qims-22-396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 08/18/2022] [Indexed: 11/10/2022]
Abstract
Arm positions employed during magnetic resonance imaging (MRI) can affect magnetic field distribution, which may result in variability in proton density fat fraction (PDFF) measurements. This study evaluated the effect of arm position on lumbar PDFF measured using chemical-shift-encoded MRI (CSE-MRI). Fifteen healthy volunteers from a single-center underwent lumbar CSE-MRI at two different arm positions (side and elevated) using a single 3T scanner. Scans were performed twice in each position. PDFFs of the L1–L5 vertebrae were independently measured by two readers, and reader measurements were compared by calculating intraclass correlation coefficients (ICC). We compared PDFF measurements from two arm positions and from two consecutive scans using the Wilcoxon test and Bland-Altman analysis. Measurements from the two readers were in high agreement [ICC =0.999; 95% confidence interval (CI), 0.998–0.999]. No significant difference was observed between PDFFs from the first and second scans of all vertebrae for each reader (all P>0.05); however, PDFF for the elevated arm position was significantly higher than that for the side arm position (37.9–44.8% vs. 37.0–43.8%; all P<0.05), except at the L2 level by reader 2. The mean differences in PDFF measurements from the first and second scans [0.1%; 95% limits of agreement (LoA), −1.8% to 1.9%] and from the side arm and elevated arm positions (0.8%; 95% LoA, −1.6% to 3.2%) were small. In conclusion, these preliminary data suggest that different arm positions during CSE-MRI can slightly affect lumbar PDFF; however, the mean absolute differences were very small.
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Affiliation(s)
- Tatsuya Hayashi
- Graduate School of Medical Technology, Teikyo University, Tokyo, Japan
| | - Shimpei Yano
- Central of Radiology, Teikyo University Hospital, Tokyo, Japan
| | - Shuhei Shibukawa
- Department of Radiological Technology, Juntendo University, Tokyo, Japan
- Center for Evolutionary Cognitive Sciences, Graduate School of Art and Sciences, The University of Tokyo, Tokyo, Japan
| | - Shinya Kojima
- Graduate School of Medical Technology, Teikyo University, Tokyo, Japan
| | - Toshimune Ito
- Graduate School of Medical Technology, Teikyo University, Tokyo, Japan
| | - Hiroshi Oba
- Department of Radiology, Teikyo University School of Medicine, Tokyo, Japan
| | - Hiroshi Kondo
- Department of Radiology, Teikyo University School of Medicine, Tokyo, Japan
| | - Asako Yamamoto
- Department of Radiology, Teikyo University School of Medicine, Tokyo, Japan
| | - Takahide Okamoto
- Graduate School of Medical Technology, Teikyo University, Tokyo, Japan
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Yoshimaru D, Araki Y, Matsuda C, Shirota N, Tajima Y, Shibukawa S, Murata K, Nickel D, Saito K. Evaluation of liver tumor identification rate of volumetric-interpolated breath-hold images using the compressed sensing method and qualitative evaluation of tumor contrast effect via visual evaluation. Quant Imaging Med Surg 2022; 12:2649-2657. [DOI: 10.21037/qims-21-850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 01/21/2022] [Indexed: 11/06/2022]
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Shibukawa S, Niwa T, Miyati T, Ogino T, Yoshimaru D, Kuroda K. Temperature measurement of intracranial cerebrospinal fluid using second-order motion compensation diffusion tensor imaging. Phys Med Biol 2021; 66. [PMID: 34874287 DOI: 10.1088/1361-6560/ac3fff] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 12/03/2021] [Indexed: 11/12/2022]
Abstract
To reduce the determination errors of CSF pulsation in diffusion-weighted image (DWI) thermometry, we investigated whether applying second-order motion compensation diffusion tensor imaging (2nd-MC DTI) and fractional anisotropy (FA) processing improves the measurement of intracranial cerebrospinal fluid (CSF) temperature. In a phantom study, we investigated the relationship between temperature and FA in artificial CSF (ACSF) to determine the threshold for FA processing. The calculated temperatures of ACSF were compared with those of water. In a human study, 18 healthy volunteers were scanned using conventional DTI (c-DTI) and 2nd-MC DTI on a 3.0 T magnetic resonance imaging (MRI) system. A temperature map was created using diffusion coefficients from each DWI with/without FA processing. The temperatures of intracranial CSF were compared between each DTI image using Welch's analysis of variance and Games-Howell's multiple comparisons. In the phantom study, FA did not exceed 0.1 at any temperature. Consequently, pixels exceeding the threshold of 0.1 were removed from the temperature map. Intracranial CSF temperatures significantly differed between the four methods (p < 0.0001). The lowest temperature was 2nd-MC DTI with FA processing (mean, 35.62 °C), followed in order by c-DTI with FA processing (mean, 36.16 °C), 2nd-MC DTI (mean, 37.08 °C), and c-DTI (mean, 39.08 °C;p < 0.01 for each). Because the calculated temperature of ACSF was estimated to be lower than that of water, the temperature of 2nd-DTI with FA processing was considered reasonable. The method of 2nd-MC DTI with FA processing enabled determining intracranial CSF temperature with a reduction in CSF pulsation.
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Affiliation(s)
- Shuhei Shibukawa
- Department of Radiological Technology, Faculty of Health Science, Juntendo University, Bunkyo-Ku, Tokyo, Japan.,Department of Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan.,Center for Evolutionary Cognitive Sciences, Graduate School of Art and Sciences, The University of Tokyo, Meguro-ku, Tokyo, Japan.,Department of Radiology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan
| | - Tetsu Niwa
- Department of Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Tosiaki Miyati
- Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Tetsuo Ogino
- Philips Japan, Healthcare, Shinagawa, Tokyo, Japan
| | - Daisuke Yoshimaru
- Department of Radiology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan.,Division of Regenerative Medicine, Jikei University School of Medicine, Tokyo, Japan
| | - Kagayaki Kuroda
- Course of Electrical and Electronic Engineering, Graduate School of Engineering, Tokai University, Kanagawa, Japan
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Horie T, Kajihara N, Saito H, Shibukawa S, Obara M, Ogino T, Niwa T, Kuroda K, Matsumae M. Visualization of Cerebrospinal Fluid Motion in the Whole Brain Using Three-dimensional Dynamic Improved Motion-sensitized Driven-equilibrium Steady-state Free Precession. Magn Reson Med Sci 2021; 20:112-118. [PMID: 32188834 PMCID: PMC7952212 DOI: 10.2463/mrms.tn.2019-0171] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The feasibility of the 3D dynamic improved motion-sensitized driven-equilibrium steady-state free precession (3D dynamic iMSDE SSFP) was evaluated for visualizing CSF motion and the appropriate parameters were determined. Both flow phantom and volunteer studies revealed that linear ordering and the shortest acquisition duration time were optimal. 3D dynamic iMSDE SSFP provides good quality imaging of CSF motion in the whole brain and enables visualization of flow in arbitrary planes from a single 3D volume scan.
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Affiliation(s)
- Tomohiko Horie
- Department of Radiology, Tokai University Hospital.,Division of Diagnostic Image Analysis, Graduate School of Medicine, Tohoku University
| | - Nao Kajihara
- Department of Radiology, Tokai University Hospital
| | - Haruo Saito
- Division of Diagnostic Image Analysis, Graduate School of Medicine, Tohoku University
| | | | | | | | - Tetsu Niwa
- Department of Radiology, Tokai University School of Medicine
| | - Kagayaki Kuroda
- Course of Electrical and Electronic Engineering, Graduate School of Engineering, Tokai University
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Shibukawa S, Saito M, Niwa T, Obara M, Konta N, Hara T, Okazaki T, Nomura T. Optimized enhanced acceleration selective arterial spin labeling (eAccASL) for non-gated and non-enhanced MR angiography of the hands. Magn Reson Imaging 2021; 78:1-6. [PMID: 33486082 DOI: 10.1016/j.mri.2021.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/13/2020] [Accepted: 01/16/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE Enhanced acceleration selective arterial spin labeling (eAccASL) was introduced as non-enhanced and non-gated magnetic resonance angiography (MRA). This technique has not been applied to hand MRA. The objective of this study was to optimize the eAccASL for MRA of the hands and to investigate the factors for MRA visibility of the hands. METHODS Twenty healthy volunteers were examined on a 1.5 T MR system. To evaluate arterial visualization, we compared four different acceleration-encoding (AENC) values (i.e., 0.12, 0.29, 0.58, and 0.87 m/s2). Image quality score regarding the MRA depiction of the proximal artery (range, 0-10), the distal artery (0-5), and venous contamination (0-5) was evaluated by three radiologists. We measured the peak to peak arterial blood flow velocity (Vpp) measured by phase contrast cine MRI and hand temperature as the factors for arterial visualization. Qualitative scores were compared with Friedman's tests. Spearman's correlation of qualitative scores with Vpp and hand temperature was performed to analyze influencing factors. RESULTS For the distal arterial depiction, scores at AENC 0.12 (median, 9.0) and AENC 0.29 (8.0) were significantly better (both P < 0.0001) than those at AENC 0.87 (5.5). For the proximal arterial depiction, scores at AENC 0.12 (2.25) and AENC 0.29 (2.0) were significantly better (P < 0.001 and P < 0.01, respectively) than those at AENC 0.87 (1.5). Conversely, venous contamination scores at AENC 0.12 (3.0) and AENC 0.29 (3.0) were significantly worse (both P < 0.0001) than those at AENC 0.87 (4.0). There were significantly negative correlations between venous contamination and Vpp at AENC 0.12 (ρ = -0.56, P = 0.01), and 0.29 (ρ = -0.68, P = 0.001), whereas hand temperatures were not significantly correlated with scores (all P > 0.05). CONCLUSION eAccASL MRA of the hands was optimized by using low AENC values (0.12-0.29 m/s2). Venous contamination may increase with elevation of arterial blood flow.
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Affiliation(s)
- Shuhei Shibukawa
- Department of Radiology, Tokai University Hospital, Isehara, Kanagawa, Japan.
| | - Misaki Saito
- Department of Radiology, Tokai University Hospital, Isehara, Kanagawa, Japan
| | - Tetsu Niwa
- Department of Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | | | - Natsuo Konta
- Department of Radiology, Tokai University Hospital, Isehara, Kanagawa, Japan
| | - Takuya Hara
- Department of Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Takashi Okazaki
- Department of Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Takakiyo Nomura
- Department of Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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11
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Shibukawa S, Konta N, Niwa T, Obara M, Akamine Y, Shinozaki N, Okazaki T, Nagafuji Y, Miyati T. Non-enhanced and Non-gated MR Angiography for Robust Visualization of Peripheral Arteries Using Enhanced Acceleration-selective Arterial Spin Labeling (eAccASL). Magn Reson Med Sci 2020; 20:312-319. [PMID: 32655087 PMCID: PMC8424028 DOI: 10.2463/mrms.tn.2019-0172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
This study aimed to assess the feasibility for applying enhanced acceleration-selective arterial spin labeling (eAccASL) to non-electrocardiogram-gated and non-enhanced peripheral MRA. We compared eAccASL and background suppressed single shot turbo field echo (TFE)-triggered angiography non-contrast-enhanced sequence (BASS TRANCE) required electrocardiographic-gating in eight volunteers and three patients. In the volunteer study, eAccASL demonstrated a comparable arterial visualization compared with BASS TRANCE. In patient observation, the advantages with eAccASL were found in arterial visualization on the collateral vessels and without artifacts affected by arrhythmia events.
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Affiliation(s)
| | - Natsuo Konta
- Department of Radiology, Tokai University Hospital
| | - Tetsu Niwa
- Department of Radiology, Tokai University School of Medicine
| | | | | | | | - Takashi Okazaki
- Department of Radiology, Tokai University School of Medicine
| | - Yui Nagafuji
- Department of Radiology, Tokai University School of Medicine
| | - Tosiaki Miyati
- Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University
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12
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Nishiyama J, Yonemochi T, Yokota K, Atsumi H, Sorimachi T, Chang HS, Matsumae M, Shibukawa S, Takano S, Kajihara N. NI-08 TRIAL AND PROBLEM OF USING ASL IN INTRAOPERATIVE MRI. Neurooncol Adv 2019. [PMCID: PMC7213469 DOI: 10.1093/noajnl/vdz039.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Magnetic resonance perfusion imaging is considered to be available as grading of brain tumor and follow-up of brain treatment. One of the methods, arterial spin labeling (ASL), is a test that is useful for patients with renal impairment and contrast agent allergy and has low invasiveness because it does not use a contrast agent. However, there have been no reports of ASL in intraoperative MRI (iMRI). PURPOSE In this hospital iMRI (1.5T), it was examined whether ASL could be used to evaluate residual tumor in patients under general anesthesia. CASE STUDY A 75-year-old woman with right temporal lobe Glioblastoma. 43-year-old man, left temporal lobe Diffuse astrocytoma. All performed ASL at the time of MRI imaging for navigation before induction of anesthesia just before surgery and iMRI. In all cases, the blood pressure at iMRI was maintained, and Post Label Delay (PLD) calculated the optimal PLD from the carotid artery velocity measured by iMRI, and defined it as 1800–2200 ms, and performed ASL. RESULTS Actually, imaging by iMRI was almost difficult to visualize, and reflux was not recognized not only in the tumor but also in the gray matter. DISCUSSION The blood flow velocity measurement in the internal carotid artery is performed by the phase contrast method by intraoperative MRI, and the CBF decreases because propofol used during the operation decreases the CBF and also the brain metabolism. However, it has been suggested that it is one of the factors that make evaluation with ASL difficult. Although the iMRI of our hospital is 1.5 T, which is also a subject of investigation, it is thought that there is a limit to ASL imaging in the case of general anesthesia with propofol even from the calculated PLD. CONCLUSION ASL in iMRI at our hospital was not useful.
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Affiliation(s)
- Jun Nishiyama
- Department of Neurosurgery, Tokai University School of Medicine, Kanagawa, Japan
| | - Takuya Yonemochi
- Department of Neurosurgery, Tokai University School of Medicine, Kanagawa, Japan
| | - Kazuma Yokota
- Department of Neurosurgery, Tokai University School of Medicine, Kanagawa, Japan
| | - Hideki Atsumi
- Department of Neurosurgery, Tokai University School of Medicine, Kanagawa, Japan
| | - Takatoshi Sorimachi
- Department of Neurosurgery, Tokai University School of Medicine, Kanagawa, Japan
| | - Han Soo Chang
- Department of Neurosurgery, Tokai University School of Medicine, Kanagawa, Japan
| | - Mitsunori Matsumae
- Department of Neurosurgery, Tokai University School of Medicine, Kanagawa, Japan
| | - Shuhei Shibukawa
- Department of Neurosurgery, Tokai University School of Medicine, Kanagawa, Japan
| | - Susumu Takano
- Department of Neurosurgery, Tokai University School of Medicine, Kanagawa, Japan
| | - Nao Kajihara
- Department of Neurosurgery, Tokai University School of Medicine, Kanagawa, Japan
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13
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Nomura T, Niwa T, Ozawa S, Oguma J, Shibukawa S, Imai Y. The Visibility of the Terminal Thoracic Duct Into the Venous System Using MR Thoracic Ductography with Balanced Turbo Field Echo Sequence. Acad Radiol 2019; 26:550-554. [PMID: 29748046 DOI: 10.1016/j.acra.2018.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 04/17/2018] [Accepted: 04/17/2018] [Indexed: 12/30/2022]
Abstract
RATIONALE AND OBJECTIVES Magnetic resonance thoracic ductography (MRTD) with balanced turbo field echo (bTFE) can visualize both the thoracic duct and its surrounding vessels. This study aimed to investigate the visibility of the terminal thoracic duct into the venous system in the subclavian region using MRTD with bTFE. MATERIALS AND METHODS MRTD was performed with bTFE as a preoperative workup comprising respiratory gating on a 1.5-T magnetic resonance system for patients with esophageal cancer. The portion and the number of terminal thoracic ducts into the venous system and preterminal branching in the left subclavian region were assessed using MRTD in 132 patients. The confidence level of the visibility using MRTD was also evaluated. RESULTS The most frequent terminal portion of the thoracic duct was the jugulovenous angle (92 patients, 69.7%), followed by the subclavian vein (27 patients, 20.5%) and the internal jugular vein (8 patients, 6.1%). Four patients also exhibited double entry of the thoracic duct into the venous system. The preterminal branching was single in 96 patients (72.7%) and multiple in 36 patients (27.3%). The confidence level of the visibility of the thoracic duct using MRTD was absolutely certain in 112 patients (84.8%) and was somewhat certain in 20 patients (15.2%). CONCLUSIONS MRTD with bTFE is a robust imaging modality to visualize the terminal portion of the thoracic duct into the venous system in the subclavian region.
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Affiliation(s)
- Takakiyo Nomura
- Department of Diagnostic Radiology, Tokai University School of Medicine, 143 Shimokasuya, Isehara, 259-1193, Japan
| | - Tetsu Niwa
- Department of Diagnostic Radiology, Tokai University School of Medicine, 143 Shimokasuya, Isehara, 259-1193, Japan.
| | - Soji Ozawa
- Department of Gastroenterological Surgery, Tokai University School of Medicine, Isehara, Japan
| | - Junya Oguma
- Department of Gastroenterological Surgery, Tokai University School of Medicine, Isehara, Japan
| | - Shuhei Shibukawa
- Department of Radiology, Tokai University Hospital, Isehara, Japan
| | - Yutaka Imai
- Department of Diagnostic Radiology, Tokai University School of Medicine, 143 Shimokasuya, Isehara, 259-1193, Japan
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14
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Okazaki T, Niwa T, Suzuki K, Shibukawa S, Imai Y. Age related signal changes of the pituitary stalk on thin-slice magnetic resonance imaging in infants. Brain Dev 2019; 41:327-333. [PMID: 30514608 DOI: 10.1016/j.braindev.2018.11.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 10/24/2018] [Accepted: 11/19/2018] [Indexed: 01/31/2023]
Abstract
PURPOSE Signals of some brain regions change along with development in T1-weighted imaging (T1WI) in infants. This study aimed to assess the association of the signal intensity of the pituitary stalk on thin-slice T1WI with infant age. METHODS This retrospective study was performed in 89 infants (gestational age [GA], 25-41 weeks; postmenstrual age [PMA], 36-46 weeks; chronological age [CA], 4-141 days) without intracranial abnormalities. The signal ratio of the pituitary stalk/pons on thin-slice T1WI was calculated, and its correlations with GA, PMA, and CA were assessed. Additionally, the signal ratio of the anterior pituitary gland/pons was calculated, and its correlation with that of the pituitary stalk was assessed. The signal intensity and distribution of the pituitary stalk were visually rated, and their correlations with GA, PMA, and CA were assessed. RESULTS The signal ratio of the pituitary stalk was significantly positively correlated with GA (P < 0.001) and negatively correlated with CA (P < 0.001), but was not correlated with PMA. Stepwise multiple regression revealed that CA was independently associated with the signal ratio of the pituitary stalk (P < 0.001). GA was significantly higher (P < 0.05) and CA was significantly lower (P < 0.05) in infants with a high signal intensity and wide distribution of high signal intensity of the pituitary stalk. CONCLUSIONS The signal intensity of the pituitary stalk on T1WI was negatively correlated with CA in infants, which might be related to postnatal changes in the pars tuberalis of the pituitary stalk after birth in infants.
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Affiliation(s)
- Takashi Okazaki
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuya, Isehara 259-1193, Japan
| | - Tetsu Niwa
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuya, Isehara 259-1193, Japan.
| | - Keiji Suzuki
- Department of Pediatrics, Tokai University School of Medicine, 143 Shimokasuya, Isehara 259-1193, Japan
| | - Shuhei Shibukawa
- Department of Radiology, Tokai University Hospital, 143 Shimokasuya, Isehara 259-1193, Japan
| | - Yutaka Imai
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuya, Isehara 259-1193, Japan
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15
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Akamine Y, Obara M, Togao O, Shibukawa S, Yoneyama M, Okuaki T, Van Cauteren M. Robust visualization of middle cerebral artery main trunk by enhanced acceleration-selective arterial spin labeling (eAccASL) for intracranial MRA. Magn Reson Med 2018; 81:3185-3191. [DOI: 10.1002/mrm.27603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 10/18/2018] [Accepted: 10/19/2018] [Indexed: 12/16/2022]
Affiliation(s)
| | | | - Osamu Togao
- Department of Clinical Radiology, Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
| | - Shuhei Shibukawa
- Department of Radiology; Tokai University Hospital; Kanagawa Japan
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16
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Niwa T, Yoneda T, Hayashi M, Suzuki K, Shibukawa S, Okazaki T, Imai Y. Characteristic phase distribution in the white matter of infants on phase difference enhanced imaging. J Neuroradiol 2018; 45:374-379. [PMID: 29604325 DOI: 10.1016/j.neurad.2018.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 02/08/2018] [Accepted: 03/10/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND PURPOSE The infantile brain is continuously undergoing development. Non-invasive methods to assess the neurological development of infants are important for the early detection of abnormalities. Some microstructures in the brain have been demonstrated via phase difference-enhanced imaging (PADRE), which may reflect myelin-related microstructures. We aimed to assess the white matter (WM) signal distribution in infants using PADRE and compared it with that using T1-weighted images (T1WI) and diffusion tensor imaging (DTI) on magnetic resonance imaging (MRI). MATERIALS AND METHOD This study included 18 infants (postmenstrual age at MRI, 37-40 weeks) without abnormal findings on MRI. Signal distribution using T1WI, a fractional anisotropy (FA) map and PADRE was assessed regarding the following intraparenchymal structures: the optic radiation (OR), internal capsule (IC), corpus callosum, corticospinal tract (CST), semiovale center and subcortical regions. RESULTS We found that the signal distribution was significantly different (P<0.001) with a relatively large signal change found at the IC and CST across the three imaging methods. Signal changes were also greater at the OR and rolandic subcortical WM on PADRE, whereas these were smaller on T1WI and FA. CONCLUSION PADRE demonstrated a characteristic phase shift distribution in infantile WM, which was different from that observed on T1WI and FA maps, and may demonstrate the developing myelin-related structures. PADRE can be a unique indicator of infantile brain development.
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Affiliation(s)
- Tesu Niwa
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuya, Isehara 259-1193, Japan.
| | - Tetsuya Yoneda
- Department of Medical Physics in Advanced Biomedical Sciences, Faculty of Life Sciences, Kumamoto University, 4-24-1 Kuhonji, Kumamoto 862-0976, Japan
| | - Masaharu Hayashi
- College of Nursing and Nutrition, Shukutoku University, 673 Nitonacho, Chuo-ku, Chiba 260-8703, Japan
| | - Keiji Suzuki
- Department of Pediatrics, Tokai University School of Medicine, 143 Shimokasuya, Isehara 259-1193, Japan
| | - Shuhei Shibukawa
- Department of Radiology, Tokai University Hospital, 143 Shimokasuya, Isehara 259-1193, Japan
| | - Takashi Okazaki
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuya, Isehara 259-1193, Japan
| | - Yutaka Imai
- Department of Radiology, Tokai University School of Medicine, 143 Shimokasuya, Isehara 259-1193, Japan
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17
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Obara M, Togao O, Beck GM, Shibukawa S, Okuaki T, Yoneyama M, Nakamura M, Honda H, Van Cauteren M. Non-contrast enhanced 4D intracranial MR angiography based on pseudo-continuous arterial spin labeling with the keyhole and view-sharing technique. Magn Reson Med 2018; 80:719-725. [PMID: 29369424 DOI: 10.1002/mrm.27074] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 12/13/2017] [Accepted: 12/14/2017] [Indexed: 11/11/2022]
Abstract
PURPOSE 4D dynamic MR angiography (4D-MRA) using pseudo-continuous arterial spin labeling (pCASL), combined with Keyhole and View-sharing (4D-PACK) for scan acceleration, is introduced. Its validity for arterial inflow dynamics visualization was investigated through comparison with 4D-pCASL and contrast inherent inflow enhanced multiphase angiography (CINEMA). METHODS Six healthy volunteers were included in the study. The arterial transit time (ATT) in 4D-PACK was measured at multiple regions in middle cerebral artery (MCA), and Pearson's correlation coefficient with ATT in 4D-pCASL was calculated. The contrast-to-noise ratio (CNR) in 4D-PACK was measured in four MCA segments and compared with that in 4D-pCASL and CINEMA. Arterial visualization in 4D-PACK was assessed qualitatively in patients with moyamoya disease and arteriovenous malformation by comparing with CINEMA. RESULTS 4D-PACK achieved a 36% scan time reduction compared with 4D-pCASL. The correlation coefficient for ATT measured by 4D-pCASL and 4D-PACK was greater than 0.96. The CNR was significantly higher using 4D-PACK compared with CINEMA in the M4 segment (P < 0.01). In patient examinations, the flow in the collateral artery or draining vein was better visualized in 4D-PACK compared with CINEMA. CONCLUSION 4D-PACK accelerates 4D-pCASL, shows similar inflow dynamics as 4D-pCASL and shows better peripheral visualization compared with CINEMA. Magn Reson Med 80:719-725, 2018. © 2018 International Society for Magnetic Resonance in Medicine.
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Affiliation(s)
- Makoto Obara
- Philips Electronics Japan Ltd., Healthcare, Shinagawa, Tokyo, Japan
| | - Osamu Togao
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | | | - Shuhei Shibukawa
- Department of Radiology, Tokai University Hospital, Isehara, Kanagawa, Japan.,Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Tomoyuki Okuaki
- Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, Japan.,Philips Healthcare, Asia Pacific, Shinagawa, Tokyo, Japan
| | - Masami Yoneyama
- Philips Electronics Japan Ltd., Healthcare, Shinagawa, Tokyo, Japan
| | | | - Hiroshi Honda
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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18
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Nomura T, Niwa T, Koizumi J, Shibukawa S, Ono S, Imai Y. Magnetic resonance thoracic ductography assessment of serial changes in the thoracic duct after the intake of a fatty meal. J Anat 2017; 232:509-514. [PMID: 29226328 DOI: 10.1111/joa.12761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/10/2017] [Indexed: 11/28/2022] Open
Abstract
The thoracic duct, a terminal lymph vessel, is thought to dilate after the intake of a fatty meal. However, this physiological change has not been well explored in vivo. Therefore, the present study aimed to assess serial changes in the thoracic duct after the intake of a fatty meal using magnetic resonance thoracic ductography (MRTD). Eight healthy volunteers were subjected to one MRTD scan before a fatty meal and eight serial MRTD scans every hour thereafter. The cross-sectional areas of the thoracic duct were estimated using MRTD measurements of the diameters of the thoracic duct at the upper edge of the aortic arch, the tracheal bifurcation, the mid-point between the tracheal bifurcation and the left part of the diaphragm and the left part of the diaphragm. The change-rates in these areas were calculated before and after the fatty meal intake, and the maximal change-rate and timing of its achievement were determined for each subject. The summed change-rates in the four portions of the thoracic duct ranged from -40.1 to 81.3%, with maximal change-rates for each subject ranging from 22.8 to 81.3% (mean, 50.4%). Although individual variations were observed, most subjects (88.9%) exhibited a maximal change-rate at 4-6 h after meal intake, with subsequent decreases at 7-8 h. In conclusion, MRTD revealed a tendency toward thoracic duct enlargement at 4-6 h after the intake of a fatty meal, followed by contraction.
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Affiliation(s)
- Takakiyo Nomura
- Department of Diagnostic Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Tetsu Niwa
- Department of Diagnostic Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Jun Koizumi
- Department of Diagnostic Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
| | - Shuhei Shibukawa
- Department of Radiology, Tokai University Hospital, Isehara, Kanagawa, Japan
| | - Shun Ono
- Department of Diagnostic Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan.,Department of Surgery, Yale School of Medicine, New Haven, CT, USA
| | - Yutaka Imai
- Department of Diagnostic Radiology, Tokai University School of Medicine, Isehara, Kanagawa, Japan
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19
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Mukai M, Nagata E, Shibukawa S, Kajihara N, Niwa T, Takizawa S. Magnetic resonance neurography for the differential diagnosis of CIDP and other neurological disorders. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Shibukawa S, Miyati T, Niwa T, Matsumae M, Ogino T, Horie T, Imai Y, Muro I. Time-spatial Labeling Inversion Pulse (Time-SLIP) with Pencil Beam Pulse: A Selective Labeling Technique for Observing Cerebrospinal Fluid Flow Dynamics. Magn Reson Med Sci 2017; 17:259-264. [PMID: 28835572 PMCID: PMC6039785 DOI: 10.2463/mrms.tn.2017-0032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
We assessed labeling region selectivity on time-spatial labeling inversion pulse (Time-SLIP) with pencil beam pulse (PB Time-SLIP) for the use of visualizing cerebrospinal fluid (CSF) flow dynamics. We compared the selectivity of labeling to the third and fourth ventricles between PB Time-SLIP and conventional Time-SLIP (cTime-SLIP) in eight volunteers and one patient using a 1.5T MRI. PB Time-SLIP provided more selective labeling in CSF than cTime-SLIP, particularly in complex anatomical regions.
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Affiliation(s)
- Shuhei Shibukawa
- Department of Radiology, Tokai University Hospital.,Division of Health Sciences, Graduate School of Medical Science, Kanazawa University
| | - Tosiaki Miyati
- Division of Health Sciences, Graduate School of Medical Science, Kanazawa University
| | - Tetsu Niwa
- Department of Radiology, Tokai University School of Medicine
| | | | | | | | - Yutaka Imai
- Department of Radiology, Tokai University School of Medicine
| | - Isao Muro
- Department of Radiology, Tokai University Hospital
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21
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Mizuma A, Kouchi M, Shibukawa S, Ikeda S, Ishihara M, Iino M, Yanagimachi N, Nagata E, Takizawa S. High-resolution imaging of complex aortic plaques in ischemic stroke patients using 3.0 Tesla MRI with VISTA. Cardiol J 2017; 24:105-106. [PMID: 28245051 DOI: 10.5603/cj.2017.0010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Accepted: 11/13/2016] [Indexed: 11/25/2022] Open
Affiliation(s)
- Atsushi Mizuma
- Department of Neurology, Tokai University School of Medicine, Japan.
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22
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Ikeda S, Shibukawa S, Takashima H. [Participation/Dispatch Reports on International Conferences in 2016]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2016; 72:708-710. [PMID: 27546086 DOI: 10.6009/jjrt.2016_jsrt_72.8.708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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23
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Obara M, Togao O, Yoneyama M, Okuaki T, Shibukawa S, Honda H, Van Cauteren M. Acceleration-selective arterial spin labeling for intracranial MR angiography with improved visualization of cortical arteries and suppression of cortical veins. Magn Reson Med 2016; 77:1996-2004. [PMID: 27418366 DOI: 10.1002/mrm.26275] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 04/22/2016] [Accepted: 04/22/2016] [Indexed: 12/11/2022]
Abstract
PURPOSE A new approach for intracranial MR angiography (MRA) is introduced, using acceleration-selective arterial spin labeling (AccASL). The aim of this study was to investigate the arterial visualization and venous suppression using AccASL. METHODS Intracranial MRA images obtained by AccASL and time-of-flight (TOF) were compared in seven healthy volunteers and one patient with occlusion of the terminal portion of the left internal carotid artery. The volunteer images were assessed by measuring the contrast-to-noise ratio (CNR) between the middle cerebral artery (MCA) and white matter (WM) and between the confluence of sinuses and WM. Additionally, visualized peripheral arteries were counted and qualitative scoring of the MCA visualization and vein signal contamination was conducted. RESULTS The CNR at the M4 branch and the number of visualized arteries was significantly higher using AccASL compared with that in TOF (P < 0.05). In the qualitative comparison, the score for artery visualization was higher using AccASL (P < 0.05), while minimizing signal contamination by cortical veins. Additionally, in patient examination, the collateral flow visualization was better with AccASL. CONCLUSION AccASL enables better efficiency for visualizing peripheral arteries compared with TOF, while suppressing cortical vein signal. Magn Reson Med 77:1996-2004, 2017. © 2016 International Society for Magnetic Resonance in Medicine.
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Affiliation(s)
- Makoto Obara
- Philips Electronics Japan Ltd., Healthcare, Shinagawa, Tokyo, Japan
| | - Osamu Togao
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masami Yoneyama
- Philips Electronics Japan Ltd., Healthcare, Shinagawa, Tokyo, Japan
| | | | - Shuhei Shibukawa
- Department of Radiology, Tokai University Hospital, Isehara, Kanagawa, Japan.,Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, Japan
| | - Hiroshi Honda
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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24
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Nomura T, Niwa T, Kazama T, Sekiguchi T, Okazaki T, Shibukawa S, Nishio H, Obara M, Imai Y. Balanced Turbo Field Echo with Extended k-space Sampling: A Fast Technique for the Thoracic Ductography. Magn Reson Med Sci 2016; 15:405-410. [PMID: 27001397 PMCID: PMC5608115 DOI: 10.2463/mrms.tn.2015-0111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
We evaluated the visibility of the thoracic duct by fast balanced turbo field echo with extended k-space sampling (bTFEe). The thoracic duct of 10 healthy volunteers was scanned by bTFEe using a 1.5-T magnetic resonance imaging (MRI), which was acquired in approximately 2 minutes. Three-dimensional (3D) turbo spin-echo (TSE) was obtained for comparison. The thoracic duct including draining location of the venous system was overall well visualized on bTFEe, compared to TSE.
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Affiliation(s)
- Takakiyo Nomura
- Department of Radiology, Tokai University School of Medicine
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Shibukawa S, Nishio H, Niwa T, Obara M, Miyati T, Hara T, Imai Y, Muro I. Optimized 4D time-of-flight MR angiography using saturation pulse. J Magn Reson Imaging 2015; 43:1320-6. [DOI: 10.1002/jmri.25118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 11/25/2015] [Indexed: 11/11/2022] Open
Affiliation(s)
- Shuhei Shibukawa
- Department of Radiology; Tokai University Hospital; Isehara Kanagawa Japan
- Division of Health Sciences, Graduate School of Medical Sciences; Kanazawa University; Kanazawa Ishikawa Japan
| | - Hiroaki Nishio
- Department of Radiology; Gifu prefectual Tajimi Hospital; Tajimi Gifu Japan
| | - Tetsu Niwa
- Department of Radiology; Tokai University School of Medicine; Isehara Kanagawa Japan
| | - Makoto Obara
- Philips Electronics Japan, Healthcare; Shinagawa Tokyo Japan
| | - Tosiaki Miyati
- Division of Health Sciences, Graduate School of Medical Sciences; Kanazawa University; Kanazawa Ishikawa Japan
| | - Takuya Hara
- Department of Radiology; Tokai University School of Medicine; Isehara Kanagawa Japan
| | - Yutaka Imai
- Department of Radiology; Tokai University School of Medicine; Isehara Kanagawa Japan
| | - Isao Muro
- Department of Radiology; Tokai University Hospital; Isehara Kanagawa Japan
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26
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Takano S, Horie T, Endo K, Shibukawa S, Honda M, Muro I, Ogino T. [Problem of spectral attenuated with inversion recovery fat suppression method with respiratory-gated]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2013; 69:92-8. [PMID: 23358343 DOI: 10.6009/jjrt.2013_jsrt_69.1.92] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The purpose of this study was to investigate the effect of fat suppression when we use respiratory-gated spectral attenuated with inversion recovery (SPAIR) method with respiratory-gated. We experimented on phantom and in-vivo study using simulated wave of respiratory-gated SPAIR at 1.5 tesla and 3.0 tesla. As a result, the effect of fat suppression becomes wrong with longer intervals of inspiration and expiration by wave of respiratory-gated. The signal intensity also varies with each slice. This result had the same trend on phantom and in-vivo study. The longitudinal magnetization of fat becomes a stable state when SPAIR pulse is shot more than once. However, the SPAIR method with respiratory-gated collect signal before the longitudinal magnetization of fat to be stable state, and fat suppression effect becomes bad, because the inversion time does not match the null point of the fat. Therefore, when we use SPAIR method with respiratory-gated it always causes bad fat suppression.
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27
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Shibukawa S, Horie T, Nishio H, Muro I. [Basic examination of uniformity of image and contrast of multi-transmit system]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2011; 67:1192-1199. [PMID: 21937843 DOI: 10.6009/jjrt.67.1192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In 3.0-T magnetic resonance imaging (MRI), shortened radio frequency (RF) wavelengths cause B(1) inhomogeneity. Multi transmit (MT) has been reported as a method of solving this problem. We compared MT with single transmit (ST) and ST body-tuned CLEAR (BTC) in terms of basic performance because we got an opportunity to use MT. A phantom was used to evaluate the uniformity of the flip angles (FAs) of images, the phantom's diameter, and the specific electric conductivity. To evaluate contrast, volunteers performed the significant difference test, and the changes in the FA of the phantom were measured. MT and BTC were better than ST in terms of the uniformity of the images. MT had the best contrast. The results showed that the uniformity of the images and the contrast were improved using MT compared with ST because MT can be uniformly irradiated to an object using two individual RF transmitters.
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Noshiro T, Shimizu K, Watanabe T, Akama H, Shibukawa S, Miura W, Ito S, Miura Y. Changes in clinical features and long-term prognosis in patients with pheochromocytoma. Am J Hypertens 2000; 13:35-43. [PMID: 10678269 DOI: 10.1016/s0895-7061(99)00139-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
To investigate changes in preoperative clinical features and the long-term outcome of tumor recurrence, mortality, and morbidity in patients with pheochromocytoma, we retrospectively examined changes in the clinical features by comparing 49 patients from 1957 to 1985 (group I) with 46 patients from 1986 to December 1995 (group II). In addition in these 95 patients (excluding 2 who had died before operation), we evaluated long-term postoperative outcome from the initial operation to August 1996 (909 patient-years). The mean age in group II was older than that of group I. The percentage of patients having proteinuria or hypertensive retinopathy in group II was less than that in group I. Of 20 patients with incidentally discovered pheochromocytoma, 7 (35%) were > or =60 years old, 7 asymptomatic, and 11 (55%) normotensive. Plasma and urinary catecholamines in these patients were significantly (P < .01) lower than in patients with pheochromocytoma having typical clinical features. Long-term cohort study showed 14 deaths. Relative survival rates were 91% at 5 years and 83% at 10 years and unchanged thereafter. The Kaplan-Meier estimate of pheochromocytoma-free survival was shorter in patients with a larger-than-median (60 g) tumor weight. Six patients had malignant recurrence 3 to 101 months (median, 45 months) after the initial operation. Of 65 patients confirmed alive at follow-up, 11 were hypertensive. In the Cox model, hypertension-free survival was not associated with age, a family history of hypertension, duration of hypertension, or creatinine clearance. Pheochromocytoma should be diagnosed from a wide spectrum of clinical features including those that are not generally suspected of resulting from excess catecholamines or hypertension, and after surgery, patients with this disease should be followed-up carefully for a long period (at least 10 years) because of the risk of tumor recurrence and the high prevalence of disease.
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Affiliation(s)
- T Noshiro
- Second Department of Internal Medicine, Tohoku University School of Medicine, Sendai, Japan.
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Akama H, Noshiro T, Kimura N, Shimizu K, Watanabe T, Shibukawa S, Nakai S, Miura W, Ito S, Miura Y. Multiple endocrine neoplasia type 2A with the identical somatic mutation in medullary thyroid carcinoma and pheochromocytoma without germline mutation at the corresponding site in the RET proto-oncogene. Intern Med 1999; 38:145-9. [PMID: 10225670 DOI: 10.2169/internalmedicine.38.145] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A germline mutation either in exon 10 or 11 of the RET proto-oncogene is found in the majority of patients with multiple endocrine neoplasia type 2A (MEN 2A). A 41-year-old female patient was referred for further evaluation of incidentally discovered right adrenal tumor. She had bilateral adrenal pheochromocytomas and medullary thyroid carcinomas detected by endocrinological and radiological examination, and diagnosed as MEN 2A. Molecular genetic testing of the RET exons 10 and 11 exhibited the identical somatic missense mutation at codon 634 in both tumors but did not confirm germline mutations in the corresponding sites. Possible mechanisms for tumorigenesis in this patient are discussed.
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Affiliation(s)
- H Akama
- Second Department of Internal Medicine, Tohoku University School of Medicine, Sendai
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30
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Sugawara T, Noshiro T, Kusakari T, Shimizu K, Watanabe T, Akama H, Shibukawa S, Miura W, Miura Y. Preferential changes in hepatosplanchnic hemodynamics in patients with borderline hypertension. Hypertens Res 1997; 20:201-7. [PMID: 9328801 DOI: 10.1291/hypres.20.201] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
To investigate changes in systemic and regional hemodynamics during the development of human hypertension, we simultaneously measured cardiac index (CI) by the indocyanine green (ICG) dye dilution method, hepatosplanchnic blood flow (HBF) by the ICG clearance method using a two-compartment model, and renal blood flow (RBF) by the p-aminohippurate clearance method in patients with borderline and essential hypertension. In patients with borderline hypertension (BH, n = 27), HBF (435 +/- 15 ml/min/m2) and HBF/CI (16 +/- 1%) were significantly (p < 0.05) lower than in age-matched normotensive controls (528 +/- 21 and 19 +/- 1, respectively, n = 21), while CI, RBF and RBF/CI were similar. In patients with essential hypertension (EH, n = 32), HBF, RBF, and RBF/CI were all significantly (p < 0.01) lower than in the control subjects. Hepatosplanchnic vascular resistance (HVR) in patients with BH was preferentially increased, while total peripheral resistance (TPR) and renal vascular resistance (RVR) remained in the normal range. In patients with EH, TPR, HVR, and RVR were all increased. These results indicate that hemodynamic changes in patients with BH do not occur uniformly among the various regional circulations and suggest that hemodynamic changes in the hepatosplanchnic region precede those in other organ circulations during the development of human hypertension.
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Affiliation(s)
- T Sugawara
- Second Department of Internal Medicine, Tohoku University School of Medicine, Sendai, Japan
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31
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Kimura N, Miura W, Noshiro T, Mizunashi K, Hanew K, Shimizu K, Watanabe T, Shibukawa S, Sohn HE, Abe K, Miura Y, Nagura H. Plasma chromogranin A in pheochromocytoma, primary hyperparathyroidism and pituitary adenoma in comparison with catecholamine, parathyroid hormone and pituitary hormones. Endocr J 1997; 44:319-27. [PMID: 9228469 DOI: 10.1507/endocrj.44.319] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Plasma levels of chromogranin A (CgA) were measured by ELISA in 22 patients with pheochromocytoma (18 non-metastatic, 3 metastatic, and 1 mixed neuroendocrine-neural tumor), 9 patients with primary hyperparathyroidism, and 9 patients with pituitary adenoma. The plasma levels of CgA were compared with norepinephrine, epinephrine, parathyroid hormone and pituitary hormones, i.e., growth hormone and prolactin. In pheochromocytoma, CgA in preoperative plasma of the patients without metastasis was 228 +/- 38 U/L (mean +/- SEM) and significantly higher than healthy controls (30 +/- 11 U/L, n = 40). Plasma CgA was decreased after removal of the tumors (28 +/- 6.0 U/L), except in three patients with metastatic pheochromocytoma and a mixed neuroendocrine neural tumor. The concentration of CgA in the patients with non-metastatic pheochromocytoma was significantly correlated with that of plasma norepinephrine (P < 0.005, r = 0.68) and urinary norepinephrine (P < 0.05, r = 0.65), but not with that of epinephrine. There was an exceptional case in which CgA was extremely high, but the CA level was normal. This tumor was a highly malignant pheochromocytoma with extensive metastases composed of small tumor cells which were occasionally positive for tyrosine hydroxylase immunohistochemically. These cells were considered to be poorly differentiated tumor cells and synthesized a very small amount of norepinephrine. Plasma levels of the patients with primary hyperparathyroidism and the patients with pituitary adenoma were 44 +/- 4 U/L and 48 +/- 8 U/L, respectively. Only one patient with a growth hormone-producing pituitary adenoma had a high level of CgA. Plasma CgA is a useful tumor marker for pheochromocytoma, even for malignant pheochromocytoma without elevated CA level, but not for hyperparathyroidism, or pituitary adenoma.
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Affiliation(s)
- N Kimura
- Department of Pathology, Tohoku University School of Medicine, Sendai, Japan
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Noshiro T, Honma H, Shimizu K, Kusakari T, Watanabe T, Akama H, Shibukawa S, Miura W, Abe K, Miura Y. Two cases of malignant pheochromocytoma treated with cyclophosphamide, vincristine and dacarbazine in a combined chemotherapy. Endocr J 1996; 43:279-84. [PMID: 8886621 DOI: 10.1507/endocrj.43.279] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Two patients with malignant pheochromocytoma were treated with a combination chemotherapy regimen consisting of cyclophosphamide vincristine, and dacarbazine (CVD). With the first few cycles of the treatment, one patient, a 29-year-old man had a marked improvement of clinical symptoms and decreases in tumor size and catecholamine levels in plasma and urine. He had been in a clinically stable condition for 18 months but died 34 months after starting of this treatment because the CVD regimen became ineffective and rapid growth of the metastatic tumors occurred. The other patient, a 35-year-old man showed no significant change in tumor size but decreases in hormonal levels in response to CVD regimen. The patient has been in clinically stable condition in a follow-up of 24 months. The combined chemotherapy with CVD appears to be effective for advanced malignant pheochromocytoma.
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Affiliation(s)
- T Noshiro
- Second Department of Internal Medicine, Tohoku University School of Medicine, Sendai, Japan
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33
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Watanabe T, Noshiro T, Kusakari T, Akama H, Shibukawa S, Miura W, Abe K, Kimura N, Miura Y. Two cases of pheochromocytoma diagnosed histopathologically as mixed neuroendocrine-neural tumor. Intern Med 1995; 34:683-7. [PMID: 7496086 DOI: 10.2169/internalmedicine.34.683] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
We treated two rare cases of pheochromocytoma which were histopathologically diagnosed as mixed neuroendocrine-neural tumor (MNNT): a 35-year-old male patient associated with ganglioneuroblastoma and cutaneous neurofibromatosis and a 42-year-old male patient with ganglioneuroma. Both patients showed typical clinical manifestations of pheochromocytoma without any familial traits. Although each of the diseases has its own entity and clinical features, these tumors are all derived from the neural crest tissues. The tumorigenesis of MNNT is still unknown. Here, a brief review of the recent literature on this subject is discussed.
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Affiliation(s)
- T Watanabe
- Second Department of Internal Medicine, Tohoku University School of Medicine, Sendai
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Miura Y, Watanabe T, Noshiro T, Shimizu K, Kusakari T, Akama H, Shibukawa S, Miura W, Ohzeki T, Takahashi M. Plasma free dopamine: physiological variability and pathophysiological significance. Hypertens Res 1995; 18 Suppl 1:S65-72. [PMID: 8529077 DOI: 10.1291/hypres.18.supplementi_s65] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Dopamine (DA) is the most abundant catecholamines in human plasma and exists mostly in the sulfo-conjugated form (DA sulfate), a biologically inactive metabolite. The paucity of unconjugated DA (PDA) in plasma throws doubt on its physiological significance. However, PDA, when measured with a highly sensitive radioenzymatic method, showed quite different features from norepinephrine and epinephrine in some types of clinical hypertension, lower in essential hypertension and higher in primary aldosteronism and pheochromocytoma. There was a weak but significant correlation between the values of PDA and DA sulfate measured in the same specimens, but DA sulfate was more susceptible to impaired renal function. Upright posture, high salt diets and an intravenous injection of metoclopramide (MCP, 10 mg), a DA receptor antagonist, induced a slight but significant increase in PDA in normal and hypertensive subjects. An intravenous dexamethasone (2 mg) caused a gradual increase in PDA over 150 min after medication, which was completely blocked by concomitant administration of alpha-methyl-p-tyrosine, a tyrosine hydroxylase inhibitor. The responses of PDA to both high salt diets and MCP were blunted in salt-sensitive patients with uncomplicated essential hypertension. The results suggest that DA is not only a precursor of norepinephrine biosynthesis but also plays an inherent role as an active neurotransmitter in the peripheral sympathoadrenal system, and that PDA is a sensitive marker of peripheral dopaminergic activity, which may operate to modulate the cardiovascular and endocrine functions and participate in the pathogenesis of some types of hypertension.
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Affiliation(s)
- Y Miura
- Department of Informatics on Pathophysiology, Tohoku University Graduate School of Information Science, Japan
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35
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Watanabe T, Noshiro T, Akama H, Kusakari T, Shibukawa S, Miura W, Abe K, Miura Y. Effect of dexamethasone on plasma free dopamine: dopaminergic modulation in hypertensive patients. Hypertens Res 1995; 18 Suppl 1:S197-8. [PMID: 8529061 DOI: 10.1291/hypres.18.supplementi_s197] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
To investigate the peripheral dopaminergic modulation in the pathogenesis of human hypertension, we examined the responses of plasma free dopamine (DA) to dexamethasone (Dx) administration, which is suggested to activate dopaminergic activity. We administered Dx 2 mg intravenously to patients with primary aldosteronism (PA), essential hypertension (EH), and normotensive controls (NT). Plasma free DA was increased significantly in all groups and the responses were more remarkable in PA than in EH and NT. Plasma epinephrine (E) showed a gradual increase while plasma norepinephrine (NE) tended to decrease in all groups. The responses of both plasma DA and E were completely blocked by 250 mg of alpha-methyl-p-tyrosine, a tyrosine hydroxylase (TH) inhibitor, suggesting that Dx may stimulate peripheral dopaminergic activity by increasing catecholamine synthesizing enzyme (probably TH) activities. These data suggest that DA itself plays an inherent role in the sympathoadrenal regulation rather than only as a precursor of NE and that dopaminergic hyperresponses may be involved in the pathophysiology of PA.
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Affiliation(s)
- T Watanabe
- Second Department of Internal Medicine, Tohoku University School of Medicine, Sendai, Japan
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36
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Noshiro T, Akama H, Watanabe T, Kusakari T, Honma H, Shibukawa S, Miura W, Abe K, Miura Y. Renal dopamine spillover rate using 3H-dopamine radiotracer technique as an index of renal dopaminergic nerve activity. Hypertens Res 1995; 18 Suppl 1:S145-6. [PMID: 8529045 DOI: 10.1291/hypres.18.supplementi_s145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Renal and total dopamine (DA) spillover rates at rest were measured in 25 conscious rabbits with chronically implanted renal vein catheters. Renal DA spillover rate was calculated from veno-arterial difference in plasma free DA concentrations across the kidney corrected by the fractional extraction of infused 3H-DA. Plasma free DA concentrations were 11.0 +/- 2.7 pg/ml in the artery and 14.3 +/- 3.6 in the renal vein. Renal and total DA spillover rates were 0.51 +/- 0.08, 2.61 +/- 0.30 ng/min, respectively, both of which were significantly (p < 0.001) lower than the respective norepinephrine (NE) spillover rates (renal: 16.3 +/- 1.4, total: 39.6 +/- 1.7). The fractional extraction of 3H-DA across the kidney (55 +/- 3%) and the total DA clearance (285 +/- 31 ml/min) were both significantly (p < 0.05) higher than that of 3H-NE (45 +/- 3) and the total NE clearance (198 +/- 9), respectively. The ratio of renal to the total spillover rate of DA (0.23 +/- 0.05) was significantly (p < 0.05) lower than that of NE (0.41 +/- 0.04). These results demonstrate that DA is released into plasma within the kidney and suggest that the measurement of renal DA spillover rate using 3H-DA radiotracer technique is useful to detect resting renal dopaminergic nerve activity.
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Affiliation(s)
- T Noshiro
- Second Department of Internal Medicine, Tohoku University School of Medicine, Sendai, Japan
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