15 results on '"Chikara Maeda"'
Search Results
2. Effect of the Presence of Right Colic Artery on the Surgical Outcomes of Laparoscopic Colectomy for Proximal Ascending Colon Cancer
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Kenji Nanishi, Hitoshi Hino, Akio Shiomi, Hiroyasu Kagawa, Shoichi Manabe, Yusuke Yamaoka, Kai Chen, Chikara Maeda, Yusuke Tanaka, Shunsuke Kasai, Sodai Arai, and Akitosi Nankaku
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Gastroenterology ,Surgery - Published
- 2023
3. Primary Hepatic Neuroendocrine Carcinoma with Thrombocytopenia Due to Diffuse Bone Marrow and Splenic Infiltration: An Autopsy Case
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Shogo, Nakano, Kosuke, Minaga, Yasuhiro, Tani, Kohei, Tonomura, Yusuke, Hanawa, Hiroki, Morimura, Tomoko, Terashita, Hisakazu, Matsumoto, Hiroyoshi, Iwagami, Yasuki, Nakatani, Takuji, Akamatsu, Yoshito, Uenoyama, Chikara, Maeda, Kazuo, Ono, Tomohiro, Watanabe, and Yukitaka, Yamashita
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Male ,Aged, 80 and over ,Bone Marrow ,Internal Medicine ,Humans ,Anemia ,Autopsy ,General Medicine ,Thrombocytopenia ,Spleen ,Carcinoma, Neuroendocrine - Abstract
An 82-year-old man with fever and back pain was referred to our hospital and was thus found to be thrombocytopenic. A bone marrow biopsy revealed the diffuse infiltration of poorly differentiated neuroendocrine carcinoma (NEC). Computed tomography revealed a large hepatic mass. Considering the risk of bleeding due to thrombocytopenia, a needle biopsy was not performed. The patient rapidly deteriorated and died 10 days after presentation. An autopsy confirmed the diagnosis of primary hepatic NEC, with diffuse metastasis to the spleen, bone marrow, and systemic lymph nodes. This is an extremely rare case of NEC presenting with thrombocytopenia due to extensive bone marrow and splenic infiltration.
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- 2022
4. Long-term outcomes of upfront robotic rectal cancer surgery: a single-center, retrospective cohort study in Japan
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Shunsuke Kasai, Hiroyasu Kagawa, Akio Shiomi, Hitoshi Hino, Shoichi Manabe, Yusuke Yamaoka, Kai Chen, Kenji Nanishi, Chikara Maeda, and Yusuke Kinugasa
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Surgery ,General Medicine - Published
- 2023
5. Feasibility of two laparoscopic surgeries for colon cancer performed by the same surgeon on a single day
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Yusuke Tanaka, Yusuke Yamaoka, Akio Shiomi, Hiroyasu Kagawa, Hitoshi Hino, Shoichi Manabe, Kai Chen, Kenji Nanishi, Chikara Maeda, and Akifumi Notsu
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Gastroenterology - Abstract
Background Although the proportion of laparoscopic colectomies (LCs) for colon cancer is increasing, the feasibility of the same surgeon performing two LCs on a single day remains unknown. This study was conducted to clarify the feasibility of this practice by evaluating short-term and long-term outcomes. Methods This retrospective analysis enrolled patients with pathological stage I–III colon cancer who underwent LC at Shizuoka Cancer Center between 2010 and 2020. Patients were divided into two groups based on the timing of the surgery for the surgeon. The first group (n = 1,485) comprised patients who underwent LC as the first surgery of the day for the surgeon. The second group (n = 163) comprised patients who underwent LC as the second LC of the day for the surgeon. Propensity score matching was performed to balance the baseline characteristics of the first and second groups. The short-term and long-term outcomes of the two groups were compared. Results After propensity score matching, there were no significant differences in the incidence of postoperative complications of Clavien-Dindo classification grade II or higher between the first (10.4%, 17/163) and second groups (5.5%, 9/163). There were no significant differences in other perioperative outcomes, including operative time, intraoperative blood loss, and incidence of conversion to open surgery, between the two groups. Regarding long-term outcomes, there were no significant differences in overall survival or relapse-free survival between the two groups both in the full cohort and in the propensity score-matched cohort. In the propensity score–matched cohort, 5-year overall survival was 96.0% in the first group and 94.4% in the second group; 5-year relapse-free survival was 88.1% and 90.3%, respectively. Conclusion Our results suggest that the same surgeon performing two LCs for colon cancer on a single day is feasible in terms of short-term and long-term outcomes.
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- 2023
6. 18F-FDG PET/CT Imaging of G-CSF-Producing Inflammatory Myofibroblastic Tumor of the Pleura
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Koji Tokunaga, Chikara Maeda, Sadao Horikawa, Ryuko Nakayama, and Shigeaki Umeoka
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Radiology, Nuclear Medicine and imaging ,General Medicine - Abstract
We report a case of granulocyte colony-stimulating factor (G-CSF)-producing inflammatory myofibroblastic tumor of the pleura in a 71-year-old man. Contrast-enhanced CT demonstrated multiple pleural masses with pulmonary hilar lymph nodes swelling. 18F-FDG PET/CT demonstrated marked focal FDG uptake in the thoracic masses with diffuse uptake in the bone marrow. Based on the pathological findings and elevated serum G-CSF level, the patient was diagnosed as G-CSF-producing inflammatory myofibroblastic tumor. Because G-CSF-producing tumors demonstrate aggressive clinical course, early and accurate diagnosis is important.
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- 2023
7. A Case of Sigmoid Colon Cancer with Round Ligament Metastasis in the Inguinal Canal
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Hiroyasu Kagawa, Kenji Nanishi, Hitoshi Hino, Akio Shiomi, Chikara Maeda, Tadahiro Kojima, Takuma Oishi, Kai Chen, Shoichi Manabe, Yusuke Yamaoka, and Ikuma Shioi
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medicine.medical_specialty ,medicine.anatomical_structure ,Sigmoid colon cancer ,Round Ligament ,business.industry ,Gastroenterology ,medicine ,Surgery ,medicine.disease ,business ,Inguinal canal ,Metastasis - Published
- 2021
8. The Impact of Metastatic Lymph Node Size on Long-term Outcomes for pStage III Colon Cancer
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CHIKARA MAEDA, YUSUKE YAMAOKA, AKIO SHIOMI, HIROYASU KAGAWA, HITOSHI HINO, SHOICHI MANABE, SHUNICHIRO KATO, MARIE HANAOKA, and AKIFUMI NOTSU
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Research Article - Abstract
Aim: To clarify the impact of metastatic lymph node size on long-term outcomes in patients undergoing curative colectomy for pathological stage III colon cancer. Patients and Methods: This study enrolled patients who underwent curative colectomy for pStage III colon cancer between January 2013 and December 2015. All patients were divided into four groups based on the short-axis diameter of the largest MLN: Group A
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- 2021
9. The Impact of Metastatic Lymph Node Size on Long-Term Outcomes Following Curative Colectomy for Pathological Stage III Colon Cancer
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Marie Hanaoka, Chikara Maeda, Yusuke Yamaoka, Shunichiro Kato, Akifumi Notsu, Shoichi Manabe, Akio Shiomi, Hitoshi Hino, and Hiroyasu Kagawa
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Oncology ,medicine.medical_specialty ,genetic structures ,business.industry ,medicine.medical_treatment ,Stage III Colon Cancer ,medicine.anatomical_structure ,Internal medicine ,medicine ,Long term outcomes ,business ,Lymph node ,Pathological ,Colectomy - Abstract
Background: In node-positive colon cancer, the impact of MLN size on prognosis is controversial. The aim of this study was to clarify the impact of metastatic lymph node (MLN) size on long-term outcomes in patients undergoing curative resection for pStage III colon cancer.Methods: This study enrolled patients who underwent curative colectomy for pStage III colon cancer between January 2013 and December 2015. All eligible patients were divided into four groups based on the short-axis diameter of the largest MLN: Group A, < 5 mm; Group B, ≥ 5 mm and < 10 mm; Group C, ≥ 10 mm and < 15 mm; and Group D, ≥ 15 mm. We performed univariate and multivariate analysis using Cox proportional hazard regression models to identify clinicopathological factors affecting recurrence-free survival (RFS).Results: A total of 209 patients were analyzed. We evaluated 7305 LNs, of which 644 were metastatic. The 5-year RFS rates of Groups A, B, C, and D were 82.3%, 74.6%, 74.5%, and 60.7%, respectively. In univariate analysis, age older than 70 years, Group D (largest MLN ≥ 15 mm), and the absence of adjuvant chemotherapy were significantly associated with RFS. In multivariate analysis, Group D (hazard ratio [HR], 3.95; 95% confidence interval [CI], 1.34–11.65; p=0.01) and the absence of adjuvant chemotherapy (HR, 2.44; 95% CI, 1.26-4.72; pConclusion: A maximum MLN ≥ 15 mm was significantly associated with worse RFS in stage III colon cancer. Bulky MLNs might be a poor prognostic factor in node-positive colon cancer.
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- 2021
10. Efficacy of a robotic stapler on symptomatic anastomotic leakage in robotic low anterior resection for rectal cancer
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Kentaro Saito, Shoichi Manabe, Akio Shiomi, Hitoshi Hino, Yusuke Yamaoka, Shunsuke Kasai, Hiroyasu Kagawa, Chikara Maeda, Ikuma Shioi, Kenji Nanishi, Kai Chen, Marie Hanaoka, Yusuke Tanaka, Shunichiro Kato, and Tadahiro Kojima
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Adult ,Male ,medicine.medical_specialty ,Colorectal cancer ,Anastomotic Leak ,03 medical and health sciences ,0302 clinical medicine ,Surgical Staplers ,Robotic Surgical Procedures ,Surgical oncology ,Risk Factors ,Surgical Stapling ,medicine ,Humans ,Robotic surgery ,Propensity Score ,Digestive System Surgical Procedures ,Aged ,Retrospective Studies ,Aged, 80 and over ,Low Anterior Resection ,business.industry ,Rectal Neoplasms ,technology, industry, and agriculture ,General Medicine ,Middle Aged ,equipment and supplies ,medicine.disease ,Surgery ,body regions ,Diverting stoma ,surgical procedures, operative ,Treatment Outcome ,Anastomotic leakage ,030220 oncology & carcinogenesis ,Propensity score matching ,Anal verge ,030211 gastroenterology & hepatology ,Female ,business - Abstract
Clinical evidence demonstrating risk factors for anastomotic leakage including robotic staplers has remained limited, even though the use of robotic surgery has increased substantially. The purpose of this study was to evaluate the effects of robotic staplers on symptomatic anastomotic leakage in robotic low anterior resection for rectal cancer. A total of 427 consecutive patients with primary rectal cancer who underwent robotic low anterior resection without diverting stoma were investigated retrospectively. Symptomatic anastomotic leakage was defined as anastomotic leakage of Clavien–Dindo Grade ≥ II. We compared the symptomatic anastomotic leakage rates between manual and robotic staplers using propensity score matching and investigated the risk factors for symptomatic anastomotic leakage. After propensity score matching, 168 pairs of manual and robotic stapler cases were selected. The symptomatic anastomotic leakage rate was significantly higher for manual staplers (6.5%) than for robotic staplers (1.2%, p = 0.02). In a multivariate analysis, the use of a manual stapler (p = 0.04, OR 4.86, 95% CI 1.08–21.8) and anastomosis
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- 2020
11. Sewing needles in the abdominal cavity assumed to have been ingested and to have penetrated the GI tract 40 years ago: A case report
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Motoi Yoshihara, Takeru Fujita, Naoya Yamaguchi, Yuichi Kanbara, Tadahiro Kamiya, Aitaro Takimoto, Ryutarou Kobayashi, Yoshio Koike, Yoshihisa Shibata, Chikara Maeda, Takehito Kato, Kisuke Ito, Yukiko Nonaka, Taro Aoba, Motonobu Nishimura, Hideyuki Dei, and Kazuhiro Hiramatsu
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Laparoscopic surgery ,medicine.medical_specialty ,Left ovary ,medicine.diagnostic_test ,business.industry ,medicine.medical_treatment ,030231 tropical medicine ,General Medicine ,Abdominal cavity ,medicine.disease ,Surgery ,03 medical and health sciences ,0302 clinical medicine ,medicine.anatomical_structure ,Intraoperative fluoroscopy ,030220 oncology & carcinogenesis ,Medicine ,Ingestion ,Foreign body ,business ,Laparoscopy ,Foreign Bodies - Abstract
A 60-year old woman had been hospitalized in a psychiatric hospital for 40 years for schizophrenia. An X-ray was performed when she fell, which showed needles in the abdominal field. After additional examinations and questioning, the patient was diagnosed with needles in the abdominal cavity, which were assumed to have been ingested and to have perforated the GI tract 40 years ago. They were removed by laparoscopic surgery. The needles were found in the omentum and near the left ovary. There were no inflammatory reactions around them. There have been previous reports about the removal of intra-abdominal foreign bodies, but foreign body reaction occurred in most of the reports. Our case had the longest period from ingestion of the foreign bodies to their removal. Laparoscopy and intraoperative fluoroscopy are useful for removing intra-abdominal foreign bodies because of their ability to help discriminate between structures and to navigate in real time.
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- 2017
12. Sewing needles in the abdominal cavity assumed to have been ingested and to have penetrated the GI tract 40 years ago: A case report
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Naoya, Yamaguchi, Kazuhiro, Hiramatsu, Yoshihisa, Shibata, Motoi, Yoshihara, Taro, Aoba, Tadahiro, Kamiya, Yoshio, Koike, Takeru, Fujita, Chikara, Maeda, Kisuke, Ito, Yuichi, Kanbara, Motonobu, Nishimura, Ryutarou, Kobayashi, Hideyuki, Dei, Aitaro, Takimoto, Yukiko, Nonaka, and Takehito, Kato
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Gastrointestinal Tract ,Time Factors ,Needles ,Humans ,Female ,Laparoscopy ,Middle Aged ,Foreign Bodies ,Tomography, X-Ray Computed - Abstract
A 60-year old woman had been hospitalized in a psychiatric hospital for 40 years for schizophrenia. An X-ray was performed when she fell, which showed needles in the abdominal field. After additional examinations and questioning, the patient was diagnosed with needles in the abdominal cavity, which were assumed to have been ingested and to have perforated the GI tract 40 years ago. They were removed by laparoscopic surgery. The needles were found in the omentum and near the left ovary. There were no inflammatory reactions around them. There have been previous reports about the removal of intra-abdominal foreign bodies, but foreign body reaction occurred in most of the reports. Our case had the longest period from ingestion of the foreign bodies to their removal. Laparoscopy and intraoperative fluoroscopy are useful for removing intra-abdominal foreign bodies because of their ability to help discriminate between structures and to navigate in real time.
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- 2017
13. Spin-echo T1-weighted Imaging of the Brain with Interleaved Acquisition and Presaturation Pulse at 3 T
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Shin-ichi Urayama, Yukio Miki, Kaori Togashi, Chikara Maeda, Hidenao Fukuyama, Seiko Kasahara, Nobuyuki Mori, Mitsunori Kanagaki, Nobukatsu Sawamoto, and Yasutaka Fushimi
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Physics ,Neuroimaging ,business.industry ,Pulse (signal processing) ,Healthy volunteers ,Spin echo ,T1 weighted ,Radiology, Nuclear Medicine and imaging ,Nuclear medicine ,business - Abstract
Rationale and Objectives Although spin-echo (SE) sequence has some advantages over gradient-echo sequence in brain imaging, gradient-echo sequence is commonly used for T1-weighted imaging (T1WI) at 3 T because contrast on SE T1WI is widely believed to be poor at 3 T. Recently, gray-white matter contrast on single-slice and multi-slice SE imaging with interslice gap was reported as better at 3 T than at 1.5 T. This study examined the feasibility of interleaved SE T1WI of the brain at 3 T. This study also examined whether presaturation pulse (PP) sufficiently suppresses intra-arterial signals because these signals tend to be hyperintense due to longer T1 at 3 T. Materials and Methods Subjects consisted of 18 healthy volunteers. Two sets of T1WI were performed using SE sequence. One set consisted of imaging without PP, and the other consisted of imaging with PP. Each set contained three types of gapless imaging as follows; sequential, 100% interleaved, and 200% interleaved imaging. In each subject, contrast-to-noise ratio between gray-matter and white-matter (CNRGM-WM) and intra-arterial signals were evaluated. Results CNRGM-WM was significantly higher on interleaved images than on sequential images, regardless of PP (P Conclusion CNRGM-WM on SE T1WI at 3 T can be improved by interleaved acquisition, and PP sufficiently suppressed intra-arterial signals. Interleaved SE T1WI with PP appears clinically feasible at 3 T.
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- 2009
14. Susceptibility-weighted imaging at 3 Tesla delineates the optic radiation
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Hidenao Fukuyama, Nobuyuki Mori, Mitsunori Kanagaki, Yukio Miki, Seiko Kasahara, Shin-ichi Urayama, Kaori Togashi, Chikara Maeda, and Nobukatsu Sawamoto
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Physics ,Adult ,Male ,Temporal pole ,General Medicine ,Nerve Fibers, Myelinated ,White matter ,Nuclear magnetic resonance ,medicine.anatomical_structure ,Diffusion Tensor Imaging ,Diffusion tensor tractography ,Coronal plane ,Geniculate body ,Healthy volunteers ,Susceptibility weighted imaging ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Female ,Visual Pathways ,Optic radiation - Abstract
OBJECTIVES Some white matter tracts, including the optic radiation (OR), have recently been reported to be delineated as low signal intensity bands (LSBs) on T2*-weighted images at 7 T, presumably because of susceptibility effects caused by myelin.Susceptibility-weighted imaging (SWI) is more sensitive to magnetic susceptibility than T2*-weighted imaging. This study examined whether the LSBs, lateral to the lateral ventricles (LVs) on 3-T SWI, represent the OR. MATERIALS AND METHODS Subjects comprised 17 healthy volunteers. Transaxial and oblique coronal SWIs orthogonal to the long axes of the inferior horns of the LVs were acquired covering the entire OR at 3 T. For quantification of the LSBs, breadth and thickness of LSBs were measured on planes including: (a) the tip of the inferior horn of the LV, (b) the lateral geniculate body, (c) the trigone of the LV, and (d) the posterior horn of the LV. Distances between the temporal pole and most anterior tip (D) of each LSB were also measured. Diffusion tensor tractography of the OR was also compared with the LSB on SWI in 10 of the 17 subjects. RESULTS Mean and SD of LSB measurements were breadth: (a) 8.8 +/- 1.8 mm, (b) 18.6 +/- 1.7 mm, (c) 20.5 +/- 3.1 mm, (d) 23.9 +/- 4.1 mm; and thickness: (a) 1.7 +/- 0.4 mm, (b) 2.4 +/- 0.5 mm, (c) 3.7 +/- 0.5 mm, (d) 3.3 +/- 0.4 mm, respectively. Mean D was 32.0 +/- 4.0 mm. These measurements were consistent with the anatomic literature regarding the OR. D on the diffusion tensor tractography was 40.3 +/- 7.7 mm, which was significantly longer than that of the LSB on SWI (31.8 +/- 3.4) for the 10 subjects (P = 0.0002). CONCLUSIONS SWI at 3 T can constantly delineate the OR. The present study includes novelty in reporting that the entire length of the OR is constantly depicted on SWI, a 3-dimensional high-resolution imaging sequence, at a clinically more widely available 3-T magnetic field.
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- 2009
15. Spin-echo T1-weighted imaging of the brain with interleaved acquisition and presaturation pulse at 3 T: a feasibility study before clinical use
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Seiko, Kasahara, Yukio, Miki, Nobuyuki, Mori, Shin-ichi, Urayama, Mitsunori, Kanagaki, Yasutaka, Fushimi, Chikara, Maeda, Nobukatsu, Sawamoto, Hidenao, Fukuyama, and Kaori, Togashi
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Adult ,Male ,Brain ,Reproducibility of Results ,Pilot Projects ,Image Enhancement ,Magnetic Resonance Imaging ,Sensitivity and Specificity ,Image Interpretation, Computer-Assisted ,Feasibility Studies ,Humans ,Female ,Spin Labels ,Algorithms - Abstract
Although spin-echo (SE) sequence has some advantages over gradient-echo sequence in brain imaging, gradient-echo sequence is commonly used for T1-weighted imaging (T1WI) at 3 T because contrast on SE T1WI is widely believed to be poor at 3 T. Recently, gray-white matter contrast on single-slice and multi-slice SE imaging with interslice gap was reported as better at 3 T than at 1.5 T. This study examined the feasibility of interleaved SE T1WI of the brain at 3 T. This study also examined whether presaturation pulse (PP) sufficiently suppresses intra-arterial signals because these signals tend to be hyperintense due to longer T1 at 3 T.Subjects consisted of 18 healthy volunteers. Two sets of T1WI were performed using SE sequence. One set consisted of imaging without PP, and the other consisted of imaging with PP. Each set contained three types of gapless imaging as follows; sequential, 100% interleaved, and 200% interleaved imaging. In each subject, contrast-to-noise ratio between gray-matter and white-matter (CNR(GM-WM)) and intra-arterial signals were evaluated.CNR(GM-WM) was significantly higher on interleaved images than on sequential images, regardless of PP (P.0001). PP sufficiently suppressed intra-arterial signals (P.0001).CNR(GM-WM) on SE T1WI at 3 T can be improved by interleaved acquisition, and PP sufficiently suppressed intra-arterial signals. Interleaved SE T1WI with PP appears clinically feasible at 3 T.
- Published
- 2008
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