The Experts below are selected from a list of 189180 Experts worldwide ranked by ideXlab platform
Naomichi Tamaru - One of the best experts on this subject based on the ideXlab platform.
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radial volumetric imaging breath hold examination vibe with k space weighted Image Contrast kwic for dynamic gadoxetic acid gd eob dtpa enhanced mri of the liver advantages over cartesian vibe in the arterial phase
European Radiology, 2014Co-Authors: Yasunari Fujinaga, Ayumi Ohya, Hirokazu Tokoro, Akira Yamada, Kazuhiko Ueda, Hitoshi Ueda, Yoshihiro Kitou, Yasuo Adachi, Aya Shiobara, Naomichi TamaruAbstract:Objectives To compare radial volumetric imaging breath-hold examination with k-space weighted Image Contrast reconstruction (r-VIBE-KWIC) to Cartesian VIBE (c-VIBE) in arterial phase dynamic gadoxetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (DCE-MRI) of the liver.
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radial volumetric imaging breath hold examination vibe with k space weighted Image Contrast kwic for dynamic gadoxetic acid gd eob dtpa enhanced mri of the liver advantages over cartesian vibe in the arterial phase
European Radiology, 2014Co-Authors: Yasunari Fujinaga, Ayumi Ohya, Hirokazu Tokoro, Akira Yamada, Kazuhiko Ueda, Hitoshi Ueda, Yoshihiro Kitou, Yasuo Adachi, Aya Shiobara, Naomichi TamaruAbstract:To compare radial volumetric imaging breath-hold examination with k-space weighted Image Contrast reconstruction (r-VIBE-KWIC) to Cartesian VIBE (c-VIBE) in arterial phase dynamic gadoxetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (DCE-MRI) of the liver. We reviewed 53 consecutive DCE-MRI studies performed on a 3-T unit using c-VIBE and 53 consecutive cases performed using r-VIBE-KWIC with full-frame Image subset (r-VIBEfull) and sub-frame Image subsets (r-VIBEsub; temporal resolution, 2.5–3 s). All arterial phase Images were scored by two readers on: (1) Contrast-enhancement ratio (CER) in the abdominal aorta; (2) scan timing; (3) artefacts; (4) visualisation of the common, right, and left hepatic arteries. Mean abdominal aortic CERs for c-VIBE, r-VIBEfull, and r-VIBEsub were 3.2, 4.3 and 6.5, respectively. There were significant differences between each group (P < 0.0001). The mean score for c-VIBE was significantly lower than that for r-VIBEfull and r-VIBEsub in all factors except for visualisation of the common hepatic artery (P < 0.05). The mean score of all factors except for scan timing for r-VIBEsub was not significantly different from that for r-VIBEfull. Radial VIBE-KWIC provides higher Image quality than c-VIBE, and r-VIBEsub features high temporal resolution without Image degradation in arterial phase DCE-MRI. • Radial VIBE-KWIC minimised artefact and produced high-quality and high-temporal-resolution Images. • Maximum abdominal aortic enhancement was observed on sub-frame Images of r-VIBE-KWIC. • Using r-VIBE-KWIC, optimal arterial phase Images were obtained in over 90 %. • Using r-VIBE-KWIC, visualisation of the hepatic arteries was improved. • A two-reader study revealed r-VIBE-KWIC’s advantages over Cartesian VIBE.
Berthold Kiefer - One of the best experts on this subject based on the ideXlab platform.
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free breathing dynamic Contrast enhanced mri of the abdomen and chest using a radial gradient echo sequence with k space weighted Image Contrast kwic
European Radiology, 2013Co-Authors: Kyung Won Kim, Jeong Min Lee, Yong Sik Jeon, Sung Eun Kang, Jee Hyun Baek, Joon Koo Han, Byung Ihn Choi, Yungjue Bang, Berthold KieferAbstract:Objectives To evaluate the feasibility of free-breathing, dynamic Contrast-enhanced (DCE) MRI of the abdomen and thorax using the radial-gradient-echo sequence with k-space weighted Image Contrast (KWIC) reconstruction.
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free breathing dynamic Contrast enhanced mri of the abdomen and chest using a radial gradient echo sequence with k space weighted Image Contrast kwic
European Radiology, 2013Co-Authors: Yong Sik Jeon, Sung Eun Kang, Jee Hyun Baek, Byung Ihn Choi, Yungjue Bang, Berthold Kiefer, Kai Tobias Block, Hyunjun Ji, Simon BauerAbstract:Objectives To evaluate the feasibility of free-breathing, dynamic Contrast-enhanced (DCE) MRI of the abdomen and thorax using the radial-gradient-echo sequence with k-space weighted Image Contrast (KWIC) reconstruction.
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free breathing dynamic Contrast enhanced mri of the abdomen and chest using a radial gradient echo sequence with k space weighted Image Contrast kwic
European Radiology, 2013Co-Authors: Kyung Won Kim, Jeong Min Lee, Yong Sik Jeon, Sung Eun Kang, Jee Hyun Baek, Joon Koo Han, Byung Ihn Choi, Yungjue Bang, Berthold KieferAbstract:To evaluate the feasibility of free-breathing, dynamic Contrast-enhanced (DCE) MRI of the abdomen and thorax using the radial-gradient-echo sequence with k-space weighted Image Contrast (KWIC) reconstruction. Institutional review board approval was obtained. Fourteen patients underwent free-breathing radial DCE-MRI. Radial MRI yielded full-frame Images by gridding all k-space data and time-resolved subframe Images by using KWIC reconstruction technique. Using subframe KWIC Images, voxel-wise perfusion maps were created. For comparison, the breath-hold conventional Cartesian 3D-gradient-echo sequence (VIBE) was also performed during the equilibrium phase. The Image qualities of radial and conventional VIBE Images were compared quantitatively and qualitatively. Radial DCE-MRI provided high spatial resolution (1.4 × 1.4 mm) and temporal resolution (4.1 s for subframe Images) allowing voxel-wise perfusion mapping with negligible motion or streaking artefacts. There were no significant differences in SNR between full-frame radial Images and conventional VIBE Images (79.08 vs 74.80, P > 0.05). Overall Image quality score of full-frame radial Images was slightly lower than that of conventional VIBE Images (3.88 ± 0.59 vs. 4.31 ± 0.97, P < 0.05), but provided clinically useful Images. The free-breathing radial DCE-MRI can provide high spatial and temporal resolution while maintaining reasonably high Image quality and thus is a feasible technique for DCE-MRI in the abdomen and thorax. • Dynamic Contrast-enhanced magnetic resonance imaging (DCE) MRI is important in oncological imaging • Radial MRI with k-space weighted Image Contrast (KWIC) reconstruction offers potential improvements • Radial DCE-MRI provides good Image quality, reduced artefacts and high spatial/temporal resolution
Yasunari Fujinaga - One of the best experts on this subject based on the ideXlab platform.
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radial volumetric imaging breath hold examination vibe with k space weighted Image Contrast kwic for dynamic gadoxetic acid gd eob dtpa enhanced mri of the liver advantages over cartesian vibe in the arterial phase
European Radiology, 2014Co-Authors: Yasunari Fujinaga, Ayumi Ohya, Hirokazu Tokoro, Akira Yamada, Kazuhiko Ueda, Hitoshi Ueda, Yoshihiro Kitou, Yasuo Adachi, Aya Shiobara, Naomichi TamaruAbstract:Objectives To compare radial volumetric imaging breath-hold examination with k-space weighted Image Contrast reconstruction (r-VIBE-KWIC) to Cartesian VIBE (c-VIBE) in arterial phase dynamic gadoxetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (DCE-MRI) of the liver.
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radial volumetric imaging breath hold examination vibe with k space weighted Image Contrast kwic for dynamic gadoxetic acid gd eob dtpa enhanced mri of the liver advantages over cartesian vibe in the arterial phase
European Radiology, 2014Co-Authors: Yasunari Fujinaga, Ayumi Ohya, Hirokazu Tokoro, Akira Yamada, Kazuhiko Ueda, Hitoshi Ueda, Yoshihiro Kitou, Yasuo Adachi, Aya Shiobara, Naomichi TamaruAbstract:To compare radial volumetric imaging breath-hold examination with k-space weighted Image Contrast reconstruction (r-VIBE-KWIC) to Cartesian VIBE (c-VIBE) in arterial phase dynamic gadoxetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (DCE-MRI) of the liver. We reviewed 53 consecutive DCE-MRI studies performed on a 3-T unit using c-VIBE and 53 consecutive cases performed using r-VIBE-KWIC with full-frame Image subset (r-VIBEfull) and sub-frame Image subsets (r-VIBEsub; temporal resolution, 2.5–3 s). All arterial phase Images were scored by two readers on: (1) Contrast-enhancement ratio (CER) in the abdominal aorta; (2) scan timing; (3) artefacts; (4) visualisation of the common, right, and left hepatic arteries. Mean abdominal aortic CERs for c-VIBE, r-VIBEfull, and r-VIBEsub were 3.2, 4.3 and 6.5, respectively. There were significant differences between each group (P < 0.0001). The mean score for c-VIBE was significantly lower than that for r-VIBEfull and r-VIBEsub in all factors except for visualisation of the common hepatic artery (P < 0.05). The mean score of all factors except for scan timing for r-VIBEsub was not significantly different from that for r-VIBEfull. Radial VIBE-KWIC provides higher Image quality than c-VIBE, and r-VIBEsub features high temporal resolution without Image degradation in arterial phase DCE-MRI. • Radial VIBE-KWIC minimised artefact and produced high-quality and high-temporal-resolution Images. • Maximum abdominal aortic enhancement was observed on sub-frame Images of r-VIBE-KWIC. • Using r-VIBE-KWIC, optimal arterial phase Images were obtained in over 90 %. • Using r-VIBE-KWIC, visualisation of the hepatic arteries was improved. • A two-reader study revealed r-VIBE-KWIC’s advantages over Cartesian VIBE.
Jeong Min Lee - One of the best experts on this subject based on the ideXlab platform.
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free breathing dynamic Contrast enhanced mri of the abdomen and chest using a radial gradient echo sequence with k space weighted Image Contrast kwic
European Radiology, 2013Co-Authors: Kyung Won Kim, Jeong Min Lee, Yong Sik Jeon, Sung Eun Kang, Jee Hyun Baek, Joon Koo Han, Byung Ihn Choi, Yungjue Bang, Berthold KieferAbstract:Objectives To evaluate the feasibility of free-breathing, dynamic Contrast-enhanced (DCE) MRI of the abdomen and thorax using the radial-gradient-echo sequence with k-space weighted Image Contrast (KWIC) reconstruction.
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free breathing dynamic Contrast enhanced mri of the abdomen and chest using a radial gradient echo sequence with k space weighted Image Contrast kwic
European Radiology, 2013Co-Authors: Kyung Won Kim, Jeong Min Lee, Yong Sik Jeon, Sung Eun Kang, Jee Hyun Baek, Joon Koo Han, Byung Ihn Choi, Yungjue Bang, Berthold KieferAbstract:To evaluate the feasibility of free-breathing, dynamic Contrast-enhanced (DCE) MRI of the abdomen and thorax using the radial-gradient-echo sequence with k-space weighted Image Contrast (KWIC) reconstruction. Institutional review board approval was obtained. Fourteen patients underwent free-breathing radial DCE-MRI. Radial MRI yielded full-frame Images by gridding all k-space data and time-resolved subframe Images by using KWIC reconstruction technique. Using subframe KWIC Images, voxel-wise perfusion maps were created. For comparison, the breath-hold conventional Cartesian 3D-gradient-echo sequence (VIBE) was also performed during the equilibrium phase. The Image qualities of radial and conventional VIBE Images were compared quantitatively and qualitatively. Radial DCE-MRI provided high spatial resolution (1.4 × 1.4 mm) and temporal resolution (4.1 s for subframe Images) allowing voxel-wise perfusion mapping with negligible motion or streaking artefacts. There were no significant differences in SNR between full-frame radial Images and conventional VIBE Images (79.08 vs 74.80, P > 0.05). Overall Image quality score of full-frame radial Images was slightly lower than that of conventional VIBE Images (3.88 ± 0.59 vs. 4.31 ± 0.97, P < 0.05), but provided clinically useful Images. The free-breathing radial DCE-MRI can provide high spatial and temporal resolution while maintaining reasonably high Image quality and thus is a feasible technique for DCE-MRI in the abdomen and thorax. • Dynamic Contrast-enhanced magnetic resonance imaging (DCE) MRI is important in oncological imaging • Radial MRI with k-space weighted Image Contrast (KWIC) reconstruction offers potential improvements • Radial DCE-MRI provides good Image quality, reduced artefacts and high spatial/temporal resolution
Yong Sik Jeon - One of the best experts on this subject based on the ideXlab platform.
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free breathing dynamic Contrast enhanced mri of the abdomen and chest using a radial gradient echo sequence with k space weighted Image Contrast kwic
European Radiology, 2013Co-Authors: Kyung Won Kim, Jeong Min Lee, Yong Sik Jeon, Sung Eun Kang, Jee Hyun Baek, Joon Koo Han, Byung Ihn Choi, Yungjue Bang, Berthold KieferAbstract:Objectives To evaluate the feasibility of free-breathing, dynamic Contrast-enhanced (DCE) MRI of the abdomen and thorax using the radial-gradient-echo sequence with k-space weighted Image Contrast (KWIC) reconstruction.
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free breathing dynamic Contrast enhanced mri of the abdomen and chest using a radial gradient echo sequence with k space weighted Image Contrast kwic
European Radiology, 2013Co-Authors: Yong Sik Jeon, Sung Eun Kang, Jee Hyun Baek, Byung Ihn Choi, Yungjue Bang, Berthold Kiefer, Kai Tobias Block, Hyunjun Ji, Simon BauerAbstract:Objectives To evaluate the feasibility of free-breathing, dynamic Contrast-enhanced (DCE) MRI of the abdomen and thorax using the radial-gradient-echo sequence with k-space weighted Image Contrast (KWIC) reconstruction.
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free breathing dynamic Contrast enhanced mri of the abdomen and chest using a radial gradient echo sequence with k space weighted Image Contrast kwic
European Radiology, 2013Co-Authors: Kyung Won Kim, Jeong Min Lee, Yong Sik Jeon, Sung Eun Kang, Jee Hyun Baek, Joon Koo Han, Byung Ihn Choi, Yungjue Bang, Berthold KieferAbstract:To evaluate the feasibility of free-breathing, dynamic Contrast-enhanced (DCE) MRI of the abdomen and thorax using the radial-gradient-echo sequence with k-space weighted Image Contrast (KWIC) reconstruction. Institutional review board approval was obtained. Fourteen patients underwent free-breathing radial DCE-MRI. Radial MRI yielded full-frame Images by gridding all k-space data and time-resolved subframe Images by using KWIC reconstruction technique. Using subframe KWIC Images, voxel-wise perfusion maps were created. For comparison, the breath-hold conventional Cartesian 3D-gradient-echo sequence (VIBE) was also performed during the equilibrium phase. The Image qualities of radial and conventional VIBE Images were compared quantitatively and qualitatively. Radial DCE-MRI provided high spatial resolution (1.4 × 1.4 mm) and temporal resolution (4.1 s for subframe Images) allowing voxel-wise perfusion mapping with negligible motion or streaking artefacts. There were no significant differences in SNR between full-frame radial Images and conventional VIBE Images (79.08 vs 74.80, P > 0.05). Overall Image quality score of full-frame radial Images was slightly lower than that of conventional VIBE Images (3.88 ± 0.59 vs. 4.31 ± 0.97, P < 0.05), but provided clinically useful Images. The free-breathing radial DCE-MRI can provide high spatial and temporal resolution while maintaining reasonably high Image quality and thus is a feasible technique for DCE-MRI in the abdomen and thorax. • Dynamic Contrast-enhanced magnetic resonance imaging (DCE) MRI is important in oncological imaging • Radial MRI with k-space weighted Image Contrast (KWIC) reconstruction offers potential improvements • Radial DCE-MRI provides good Image quality, reduced artefacts and high spatial/temporal resolution
