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Kimoto A, Yamashita J, Ohori H, Negi N, Sekitani T, Komori H, Shioyasono A, Tateishi C, Hasegawa T, Akashi M. A Novel Imaging Technique for Analyzing Condylar Movement During Mastication in Patients With Jaw Deformities: Four-Dimensional Computed Tomography. J Craniofac Surg 2023; 34:1880-1883. [PMID: 37428979 DOI: 10.1097/scs.0000000000009509] [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] [Received: 10/26/2022] [Accepted: 05/17/2023] [Indexed: 07/12/2023] Open
Abstract
OBJECTIVE This study aimed to reveal characteristic condylar movements in patients with jaw deformities. STUDY DESIGN Thirty patients with jaw deformities before surgery were enrolled and instructed to chew a cookie during 4-dimensional computed tomography (4DCT). The distance between the most anterior and posterior positions of the bilateral condyles on 4DCT images was measured and compared among patients with different skeletal classes. Correlations between the condylar protrusion and cephalometric values were also determined. RESULTS The distances of condylar protrusion during mastication were significantly greater in the skeletal class II group than in the skeletal class III group ( P =0.0002). Significant correlations were found between the distances of condylar protrusion during mastication and the sella-nasion-B point angle ( r =-0.442, P =0.015), A point-nasion-B point angle ( r =0.516, P =0.004), sella-nasion plane to ramus plane angle ( r =0.464, P =0.01), sella-nasion plane to occlusal plane angle ( r =0.367, P =0.047), and condylion-gonion length ( r =-0.366, P =0.048). CONCLUSION Motion analysis with 4DCT images revealed that condylar movement in patients with retrognathism was larger than in patients with mandibular prognathism. Skeletal structure was therefore correlated with condylar movement during mastication.
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Affiliation(s)
- Akira Kimoto
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Junya Yamashita
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroaki Ohori
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Noriyuki Negi
- Department of Radiology, Kobe University Hospital, Kobe, Japan
| | - Toshinori Sekitani
- Department of Radiological Technologist, Osaka College of High Technology, Osaka, Japan
| | - Hiroki Komori
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Atsushi Shioyasono
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Chizu Tateishi
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takumi Hasegawa
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Masaya Akashi
- Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
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Takahara H, Kiuchi K, Fukuzawa K, Takami M, Izawa Y, Nakamura T, Nakasone K, Sonoda Y, Yamamoto K, Suzuki Y, Tani KI, Iwai H, Nakanishi Y, Shoda M, Murakami A, Yonehara S, Negi N, Somiya Y, Hirata KI. The impact of the procedural parameters on the lesion characteristics associated with AF recurrence: Late-gadolinium enhancement magnetic resonance imaging (LGE-MRI) analysis. J Cardiovasc Electrophysiol 2023; 34:527-535. [PMID: 36598438 DOI: 10.1111/jce.15805] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/09/2022] [Accepted: 12/29/2022] [Indexed: 01/05/2023]
Abstract
BACKGROUND Lesion gaps assessed by late-gadolinium enhancement magnetic resonance imaging (LGE-MRI) are associated with the atrial fibrillation (AF) recurrence after pulmonary vein isolation. Animal studies have demonstrated that the catheter-contact force (CF), stability, and orientation are strongly associated with lesion formation. However, the impact of those procedural factors on the lesion characteristics associated with AF recurrence has not been well discussed. METHODS A total of 30 patients with paroxysmal AF who underwent catheter ablation were retrospectively enrolled. Radiofrequency (RF) applications were performed with 35 W for 30 s in a point-by-point fashion under esophageal temperature monitoring. The inter-lesion distance was 4 mm. The lesions were visualized by LGE-MRI 3 months postprocedure and assessed by the LGE volume (ml), gap number (GN), and average gap length (AGL [mm]). The gaps were defined as nonenhancement sites of >4 mm. The procedural factors including the catheter-CF, stability, and orientation were calculated on the NavX system. RESULTS Six (20%) of 30 patients had AF recurrences 12 months postablation. A univariate analysis demonstrated that the AGL was associated with AF recurrence (hazard ratio [HR]: 1.20, confidence interval [CI]: 1.03-1.42, p = .02). All AF recurrence were found in patients with an AGL of >7 mm. The catheter-CF and stability were associated with an AGL of >7 mm, but not the orientation (CF-HR: 0.62, CI: 0.39-0.97, p = .038; stability-HR: 0.8, CI: 0.66-0.98, p = .027). CONCLUSIONS RF ablation with a low CF and poor catheter stability has a potential risk of creating large lesion gaps associated with AF recurrence.
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Affiliation(s)
- Hiroyuki Takahara
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kunihiko Kiuchi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Koji Fukuzawa
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Mitsuru Takami
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yu Izawa
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Toshihiro Nakamura
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kazutaka Nakasone
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yusuke Sonoda
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kyoko Yamamoto
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yuya Suzuki
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Ken-Ichi Tani
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hidehiro Iwai
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yusuke Nakanishi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Mitsuhiko Shoda
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Atsushi Murakami
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Shogo Yonehara
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Noriyuki Negi
- Division of Radiology, Center for Radiology and Radiation Oncology, Kobe, Japan
| | - Yuichiro Somiya
- Division of Radiology, Center for Radiology and Radiation Oncology, Kobe, Japan
| | - Ken-Ichi Hirata
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan.,Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
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Nakamura T, Kiuchi K, Fukuzawa K, Takami M, Watanabe Y, Izawa Y, Takemoto M, Sakai J, Yatomi A, Sonoda Y, Takahara H, Nakasone K, Yamamoto K, Suzuki Y, Tani K, Negi N, Kono A, Ashihara T, Hirata K. The impact of the atrial wall thickness in normal/mild late‐gadolinium enhancement areas on atrial fibrillation rotors in persistent atrial fibrillation patients. J Arrhythm 2022; 38:221-231. [PMID: 35387140 PMCID: PMC8977582 DOI: 10.1002/joa3.12676] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 10/19/2021] [Revised: 12/03/2021] [Accepted: 01/03/2022] [Indexed: 11/20/2022] Open
Abstract
Background Some of atrial fibrillation (AF) drivers are found in normal/mild late‐gadolinium enhancement (LGE) areas, as well as moderate ones. The atrial wall thickness (AWT) has been reported to be important as a possible AF substrate. However, the AWT and degree of LGEs as an AF substrate has not been fully validated in humans. Objective The purpose of this study was to evaluate the impact of the AWT in normal/mild LGE areas on AF drivers. Methods A total of 287 segments in 15 persistent AF patients were assessed. AF drivers were defined as non‐passively activated areas (NPAs), where rotational activation was frequently observed, and were detected by the novel real‐time phase mapping (ExTRa Mapping), mild LGE areas were defined as areas with a volume ratio of the enhancement voxel of 0% to <10%. The AWT was defined as the minimum distance from the manually determined endocardium to the epicardial border on the LGE‐MRI. Results NPAs were found in 20 (18.0%) of 131 normal/mild LGE areas where AWT was significantly thicker than that in the passively activated areas (PAs) (2.5 ± 0.3 vs. 2.2 ± 0.3 mm, p < .001). However, NPAs were found in 41 (26.3%) of 156 moderate LGE areas where AWT was thinner than that of PAs (2.1 ± 0.2 mm vs. 2.23 ± 0.3 mm, p = .02). An ROC curve analysis yielded an optimal cutoff value of 2.2 mm for predicting the presence of an NPA in normal/mild LGE areas. Conclusion The location of AF drivers in normal/mild LGE areas might be more accurately identified by evaluating AWT.
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Affiliation(s)
- Toshihiro Nakamura
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Kunihiko Kiuchi
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Koji Fukuzawa
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Mitsuru Takami
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Yoshiaki Watanabe
- Department of Radiology Kobe University Graduate School of Medicine Kobe Japan
| | - Yu Izawa
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Makoto Takemoto
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Jun Sakai
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Atsusuke Yatomi
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Yusuke Sonoda
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Hiroyuki Takahara
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Kazutaka Nakasone
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Kyoko Yamamoto
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Yuya Suzuki
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Ken‐ichi Tani
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
| | - Noriyuki Negi
- Division of Radiology Center for Radiology and Radiation Oncology Kobe University Hospital Kobe Japan
| | - Atsushi Kono
- Department of Radiology Kobe University Graduate School of Medicine Kobe Japan
| | - Takashi Ashihara
- Department of Medical Informatics and Biomedical Engineering Shiga University of Medical Science Otsu Japan
| | - Ken‐ichi Hirata
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan
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Nakamura T, Kiuchi K, Fukuzawa K, Takami M, Watanabe Y, Izawa Y, Suehiro H, Akita T, Takemoto M, Sakai J, Yatomi A, Sonoda Y, Takahara H, Nakasone K, Yamamoto K, Negi N, Kono A, Ashihara T, Hirata KI. Late-gadolinium enhancement properties associated with atrial fibrillation rotors in patients with persistent atrial fibrillation. J Cardiovasc Electrophysiol 2021; 32:1005-1013. [PMID: 33556994 DOI: 10.1111/jce.14933] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 01/12/2021] [Accepted: 01/21/2021] [Indexed: 01/08/2023]
Abstract
BACKGROUND A computational model demonstrated that atrial fibrillation (AF) rotors could be distributed in patchy late-gadolinium enhancement (LGE) areas and play an important role in AF drivers. However, this was not validated in humans. OBJECTIVE The purpose of this study was to evaluate the LGE properties of AF rotors in patients with persistent AF. METHODS A total of 287 segments in 15 patients with persistent AF (long-standing persistent AF in 9 patients) that underwent AF ablation were assessed. Non-passively activated areas (NPAs), where rotational activation (AF rotor) was frequently observed, were detected by the novel real-time phase mapping (ExTRa Mapping). The properties of the LGE areas were assessed using the LGE heterogeneity and the density which was evaluated by the entropy (LGE-entropy) and the volume ratio of the enhancement voxel (LGE-volume ratio), respectively. RESULTS NPAs were found in 61 (21%) of 287 segments and were mostly found around the pulmonary vein antrum. A receiver operating characteristic curve analysis yielded an optimal cutoff value of 5.7% and 10% for the LGE-entropy and LGE-volume ratio, respectively. The incidence of NPAs was significantly higher at segments with an LGE-entropy of >5.7 and LGE-volume ratio of >10% than at the other segments (38 [30%] of 126 vs. 23 [14%] of 161 segments; p = .001). No NPAs were found at segments with an LGE-volume ratio of >50% regardless of the LGE-entropy. Of five patients with AF recurrence, NPAs outside the PV antrum were not ablated in three patients and the remaining NPAs were ablated, but their LGE-entropy and LGE-volume ratio were low. CONCLUSION AF rotors are mostly distributed in relatively weak and much more heterogenous LGE areas.
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Affiliation(s)
- Toshihiro Nakamura
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kunihiko Kiuchi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Koji Fukuzawa
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Mitsuru Takami
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yoshiaki Watanabe
- Division of Radiology, Center for Radiology and Radiation Oncology, Kobe University Hospital, Kobe, Japan
| | - Yu Izawa
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hideya Suehiro
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tomomi Akita
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Makoto Takemoto
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Jun Sakai
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Atsusuke Yatomi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yusuke Sonoda
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroyuki Takahara
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kazutaka Nakasone
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kyoko Yamamoto
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Noriyuki Negi
- Division of Radiology, Center for Radiology and Radiation Oncology, Kobe University Hospital, Kobe, Japan
| | - Atsushi Kono
- Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takashi Ashihara
- Department of Medical Informatics and Biomedical Engineering, Shiga University of Medical Science, Otsu, Japan
| | - Ken-Ichi Hirata
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
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Kiuchi K, Fukuzawa K, Takami M, Watanabe Y, Izawa Y, Shigeru M, Oonishi H, Suehiro H, Akita T, Takemoto M, Yatomi A, Nakamura T, Sakai J, Nakasone K, Sonoda Y, Yamamoto K, Takahara H, Negi N, Kyotani K, Kono A, Hirata KI. Feasibility of catheter ablation in patients with persistent atrial fibrillation guided by fragmented late-gadolinium enhancement areas. J Cardiovasc Electrophysiol 2021; 32:1014-1023. [PMID: 33527586 DOI: 10.1111/jce.14925] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/09/2020] [Accepted: 01/10/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND A computer simulation model has demonstrated that atrial fibrillation (AF) driver can be attached to heterogeneous fibrosis assessed by late gadolinium enhancement magnetic resonance imaging (LGE-MRI). However, it has not been well elucidated in patients with persistent AF. The aim of this study was to investigate whether radiofrequency (RF) applications in the fragmented LGE area (FLA) could terminate AF or convert it to atrial tachycardia (AT) and improve the rhythm outcome. METHODS A total of 31 consecutive persistent AF patients with FLAs were enrolled (FLA ablation group, mean age: 69 ± 8 years, mean left atrial diameter: 42 ± 6 mm). A favorable response was defined as direct AF termination or AT conversion during RF applications at the FLA. The rhythm outcome was compared between the FLA ablation group and FLA burden-matched pulmonary vein isolation (PVI) group. RESULTS Favorable responses were found in 15 (48%) of 31 patients in the FLA group (AF termination in seven, AT conversion in eight patients), but not in the PVI group. AF recurrence at 12 months follow-up was significantly less in the FLA ablation group than in the PVI group (4 [13%] vs. 12 [39%] of 31 patients, log-rank p = .023). In patients with a favorable response, AT recurred in 1 (7%) of 15 patients, but AF did not. CONCLUSIONS FLA ablation could terminate AF or convert it to AT in half of the patients. No AF recurrence was documented in patients with a favorable response.
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Affiliation(s)
- Kunihiko Kiuchi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Koji Fukuzawa
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Mitsuru Takami
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yoshiaki Watanabe
- Division of Radiology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yu Izawa
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | | | | | - Hideya Suehiro
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tomomi Akita
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Makoto Takemoto
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Atsusuke Yatomi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Toshihiro Nakamura
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Jun Sakai
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kazutaka Nakasone
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yusuke Sonoda
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kyoko Yamamoto
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroyuki Takahara
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Noriyuki Negi
- Division of Diagnostic Imaging, Department of Diagnostic Radiology, Kobe University Hospital, Kobe, Japan
| | - Katsusuke Kyotani
- Division of Diagnostic Imaging, Department of Diagnostic Radiology, Kobe University Hospital, Kobe, Japan
| | - Atsushi Kono
- Division of Radiology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Ken-Ichi Hirata
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
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Kiuchi K, Fukuzawa K, Nogami M, Watanabe Y, Takami M, Izawa Y, Negi N, Kyotani K, Mori S, Hirata K. Visualization of intensive atrial inflammation and fibrosis after cryoballoon ablation: PET/MRI and LGE-MRI analysis. J Arrhythm 2021; 37:52-59. [PMID: 33664886 PMCID: PMC7896448 DOI: 10.1002/joa3.12454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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] [Received: 09/03/2020] [Revised: 10/06/2020] [Accepted: 10/25/2020] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Atrial inflammation plays an important role in initiating atrial fibrosis, which could perpetuate atrial fibrillation (AF). However, the method of visualization of atrial inflammation has not been established. We sought to investigate whether the intensive atrial inflammation caused by cryoballoon ablation (CBA) could be detected by positron emission tomography/ magnetic resonance imaging (PET/MRI) and whether the atrial inflammation could be associated with consequent fibrosis. METHODS A total of 10 paroxysmal atrial fibrillation patients after CBA were enrolled. To detect and quantify intensive atrial inflammation, PET/MRI was performed to assess regional 18F-fluorodeoxyglucose (18F-FDG) uptake one day after the CBA, and the standardized uptake values (SUV) max were compared between the pulmonary vein (PV) antrum where CBA could be applied and the healthy left atrial (LA) wall where CBA could not be applied. Furthermore, the atrial inflammation one day after the procedure and atrial fibrosis areas one month after the procedure were three-dimensionally quantified by PET/MRI and late-gadolinium enhancement magnetic resonance imaging (LGE-MRI), respectively. RESULTS The mean SUV max at the PV antrum was significantly higher than that on the healthy LA wall (2.12 ± 0.35 vs 1.73 ± 0.30, P = .00021). The volume of the atrial inflammation strongly correlated with that of the atrial fibrosis (r = .94 [.76-.99], P = .00006). CONCLUSIONS The atrial inflammation after CBA could be detected by PET/MRI. CBA-induced atrial inflammation was strongly associated with consequent lesion maturation.
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Affiliation(s)
- Kunihiko Kiuchi
- Section of ArrhythmiaDivision of Cardiovascular MedicineDepartment of Internal MedicineKobe University Graduate School of MedicineKobeJapan
| | - Koji Fukuzawa
- Section of ArrhythmiaDivision of Cardiovascular MedicineDepartment of Internal MedicineKobe University Graduate School of MedicineKobeJapan
| | - Munenobu Nogami
- Department of RadiologyKobe University Graduate School of MedicineKobeJapan
| | - Yoshiaki Watanabe
- Department of RadiologyKobe University Graduate School of MedicineKobeJapan
| | - Mitsuru Takami
- Section of ArrhythmiaDivision of Cardiovascular MedicineDepartment of Internal MedicineKobe University Graduate School of MedicineKobeJapan
| | - Yu Izawa
- Division of Cardiovascular MedicineDepartment of Internal MedicineKobe University Graduate School of MedicineKobeJapan
| | - Noriyuki Negi
- Division of RadiologyCenter for Radiology and Radiation OncologyKobe University HospitalKobe cityJapan
| | - Katsusuke Kyotani
- Division of RadiologyCenter for Radiology and Radiation OncologyKobe University HospitalKobe cityJapan
| | - Shumpei Mori
- Division of Cardiovascular MedicineDepartment of Internal MedicineKobe University Graduate School of MedicineKobeJapan
| | - Ken‐Ichi Hirata
- Section of ArrhythmiaDivision of Cardiovascular MedicineDepartment of Internal MedicineKobe University Graduate School of MedicineKobeJapan
- Division of Cardiovascular MedicineDepartment of Internal MedicineKobe University Graduate School of MedicineKobeJapan
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Kurose J, Kiuchi K, Fukuzawa K, Takami M, Mori S, Suehiro H, Nagamatsu YI, Akita T, Takemoto M, Yatomi A, Nakamura T, Sakai J, Watanabe Y, Shimoyama S, Negi N, Kyotani K, Hirata KI. Lesion characteristics between cryoballoon ablation and radiofrequency ablation with a contact force-sensing catheter: Late-gadolinium enhancement magnetic resonance imaging assessment. J Cardiovasc Electrophysiol 2020; 31:2572-2581. [PMID: 32648326 DOI: 10.1111/jce.14664] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 06/24/2020] [Accepted: 06/30/2020] [Indexed: 02/01/2023]
Abstract
BACKGROUND Pulmonary vein isolation (PVI) lesions after cryoballoon ablation (CBA) are characterized as a wider and more continuous than that after conventional radiofrequency catheter ablation (RFCA) without the contact force (CF)-sensing technology. However, the impact on the lesion characteristics of ablation with a CF-sensing catheter has not been well discussed. We sought to assess the lesions using late-gadolinium enhancement magnetic resonance imaging (LGE-MRI) and to compare the differences between the two groups (CB group vs. RF group). METHODS A total of 30 consecutive patients who underwent PVI were enrolled (CB group, 18; RF group, 12). The RF applications were delivered with a target lesion size index (LSI) of 5. The PVI lesions were assessed by LGE-MRI 3 months after the PVI. The region around the PV was divided into eight segments: roof, anterior-superior, anterior carina, anterior inferior, bottom, posterior inferior, posterior carina, and posterior superior segment. The lesion width and visual gap of each segment were compared between the two groups. The visual gaps were defined as no-enhancement site of >4 mm. RESULTS The mean LSI was 4.7 ± 0.7. The lesion width was significantly wider but the visual gaps were more frequently documented at the bottom segment of right PV in the CBA group (lesion width: 8.1 ± 2.2 vs. 6.3 ± 2.2 mm; p = .032; visual gap at the bottom segment or right PV: 39% vs. 0%; p = .016). CONCLUSIONS The PVI lesion was wider after CBA, while the visual gaps were fewer after RFCA with a CF-sensing catheter.
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Affiliation(s)
- Jun Kurose
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kunihiko Kiuchi
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Koji Fukuzawa
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Mitsuru Takami
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Shumpei Mori
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hideya Suehiro
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yu-Ichi Nagamatsu
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Tomomi Akita
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Makoto Takemoto
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Atsusuke Yatomi
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Toshihiro Nakamura
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Jun Sakai
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yoshiaki Watanabe
- Department of Internal Medicine, Division of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Shinsuke Shimoyama
- Department of Internal Medicine, Division of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Noriyuki Negi
- Division of Diagnostic Imaging, Department of Diagnostic Radiology, Kobe University Hospital, Kobe, Japan
| | - Katsusuke Kyotani
- Division of Diagnostic Imaging, Department of Diagnostic Radiology, Kobe University Hospital, Kobe, Japan
| | - Ken-Ichi Hirata
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
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Kannaujia P, Patel N, Asrey R, Mahawar M, Meena V, Bibwe B, Jalgaonkar K, Negi N. Variability of bioactive properties and antioxidant activity in commercially grown cherry tomato (Solanum lycopersicum var. cerasiforme) cultivars grown in India. Acta Alimentaria 2020. [DOI: 10.1556/066.2019.0006] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In this study, six commercial cherry tomato cultivars were analysed for variations in biochemical and technological parameters. Significant differences were observed among cultivars with respect to their technological and functional quality attributes. About 2.48-fold variation in titratable acidity, 2.47-fold variation in total phenolics, 4.13-fold variation in total carotenoid and 7.68-fold variation in lycopene contents were recorded. The total antioxidant activity and respiration rate were also found to vary about 1.85-fold and 1.48-fold, respectively. The highest antioxidant activity and total phenolic content were found in the Cherry tomato hybrid no.1 followed by Pusa cherry tomato-1. Hierarchical cluster analysis revealed that Cherry tomato hybrid no. 1, Pusa cherry tomato-1, and Nagmoti cultivars were abundantly rich in phytochemical and bioactive compounds.
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Affiliation(s)
- P.K. Kannaujia
- a Central Institute of Post-Harvest Engineering and Technology, Abohar, Punjab. India
| | - N. Patel
- b Indian Agricultural Research Institute, New Delhi. India
| | - R. Asrey
- b Indian Agricultural Research Institute, New Delhi. India
| | - M.K. Mahawar
- a Central Institute of Post-Harvest Engineering and Technology, Abohar, Punjab. India
| | - V.S. Meena
- c National Bureau of Plant Genetic Resources, New Delhi. India
| | - B. Bibwe
- a Central Institute of Post-Harvest Engineering and Technology, Abohar, Punjab. India
| | - K. Jalgaonkar
- a Central Institute of Post-Harvest Engineering and Technology, Abohar, Punjab. India
| | - N. Negi
- c National Bureau of Plant Genetic Resources, New Delhi. India
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Kiuchi K, Fukuzawa K, Nogami M, Watanabe Y, Takami M, Mori S, Shimoyama S, Negi N, Kyotani K, Hirata KI. Visualization of Inflammation After Cryoballoon Ablation in Atrial Fibrillation Patients - Protocol for Proof-of-Concept Feasibility Trial. Circ Rep 2020; 1:149-152. [PMID: 33693130 PMCID: PMC7890275 DOI: 10.1253/circrep.cr-19-0003] [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: 11/23/2022] Open
Abstract
Background:
Atrial fibrosis and inflammation play important roles in perpetuating and initiating atrial fibrillation (AF). Although the fibrotic area can be visualized as a delayed enhancement area on late gadolinium enhancement magnetic resonance imaging (LGE-MRI), atrial inflammation has not yet been visualized on any imaging modality. We describe the protocol for a feasibility study to visualize atrial inflammation on positron emission tomography/MRI (PET/MRI). Methods and Results:
This is a single-arm, prospective, open-label proof-of concept trial, involving AF patients after cryoballoon ablation (CBA). A total of 30 paroxysmal AF patients will be enrolled and undergo simultaneous PET/MRI for the assessment of regional 18F-fluorodeoxyglucose (18F-FDG) uptake 1 day after the CBA. Furthermore, LGE-MRI will be performed before CBA, and at 1 and 4 weeks after assessing the regional LGE area. The main outcome measures will be (1) the feasibility of imaging inflammation in the left atrium on PET/MRI; and (2) the safety of the intervention. Conclusions:
There are few data on the visualization of atrial inflammation using PET/MRI. Establishing the visualization methodology will contribute to elucidating the fundamental histopathologic findings of the progress to fibrosis, and to the planning and execution of a larger definitive trial to test the usefulness of PET/MRI.
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Affiliation(s)
- Kunihiko Kiuchi
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine Kobe Japan
| | - Koji Fukuzawa
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine Kobe Japan
| | - Munenobu Nogami
- Department of Radiology, Kobe University Graduate School of Medicine Kobe Japan
| | - Yoshiaki Watanabe
- Department of Radiology, Kobe University Graduate School of Medicine Kobe Japan
| | - Mitsuru Takami
- Section of Arrhythmia, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine Kobe Japan
| | - Shumpei Mori
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine Kobe Japan
| | - Shinsuke Shimoyama
- Department of Radiology, Kobe University Graduate School of Medicine Kobe Japan
| | - Noriyuki Negi
- Division of Radiology, Center for Radiology and Radiation Oncology, Kobe University Hospital Kobe Japan
| | - Katsusuke Kyotani
- Division of Radiology, Center for Radiology and Radiation Oncology, Kobe University Hospital Kobe Japan
| | - Ken-Ichi Hirata
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine Kobe Japan
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Akita T, Kiuchi K, Fukuzawa K, Shimane A, Matsuyama S, Takami M, Kurose J, Oonishi H, Shigeru M, Nagamatsu Y, Suehiro H, Takemoto M, Nakamura T, Sakai J, Yatomi A, Mori S, Shimoyama S, Negi N, Kyotani K, Hirata K. Lesion distribution after cryoballoon ablation and hotballoon ablation: Late‐gadolinium enhancement magnetic resonance imaging analysis. J Cardiovasc Electrophysiol 2019; 30:1830-1840. [DOI: 10.1111/jce.14073] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 07/06/2019] [Accepted: 07/09/2019] [Indexed: 01/15/2023]
Affiliation(s)
- Tomomi Akita
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
| | - Kunihiko Kiuchi
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
| | - Koji Fukuzawa
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
| | - Akira Shimane
- Department of CardiologyHimeji Cardiovascular Center Kobe Japan
| | | | - Mitsuru Takami
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
| | - Jun Kurose
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
| | | | | | - Yu‐Ichi Nagamatsu
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
| | - Hideya Suehiro
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
| | - Makoto Takemoto
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
| | - Toshihiro Nakamura
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
| | - Jun Sakai
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
| | - Atsusuke Yatomi
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
| | - Shumpei Mori
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
| | - Shinsuke Shimoyama
- Department of RadiologyKobe University Graduate School of Medicine Kobe Japan
| | - Noriyuki Negi
- Division of Radiology, Center for Radiology and Radiation OncologyKobe University Hospital Kobe Japan
| | - Katsusuke Kyotani
- Division of Radiology, Center for Radiology and Radiation OncologyKobe University Hospital Kobe Japan
| | - Ken‐Ichi Hirata
- Section of Arrhythmia, Department of Internal Medicine, Division of Cardiovascular MedicineKobe University Graduate School of Medicine Kobe Japan
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Kurose J, Kiuchi K, Fukuzawa K, Mori S, Ichibori H, Konishi H, Taniguchi Y, Hyogo K, Imada H, Suehiro H, Nagamatsu YI, Akita T, Takemoto M, Hirata KI, Shimoyama S, Watanabe Y, Nishii T, Negi N, Kyotani K. The lesion characteristics assessed by LGE-MRI after the cryoballoon ablation and conventional radiofrequency ablation. J Arrhythm 2018; 34:158-166. [PMID: 29657591 PMCID: PMC5891401 DOI: 10.1002/joa3.12025] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [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] [Received: 10/24/2017] [Accepted: 11/23/2017] [Indexed: 12/29/2022] Open
Abstract
Background Rhythm outcomes after the pulmonary vein isolation (PVI) using the cryoballoon (CB) are reported to be excellent. However, the lesions after CB ablation have not been well discussed. We sought to characterize and compare the lesion formation after CB ablation with that after radiofrequency (RF) ablation. Methods A total of 42 consecutive patients who underwent PVI were enrolled (29 in the CB group and 13 in the RF group). The PVI lesions were assessed by late gadolinium enhancement magnetic resonance imaging 1–3 months after the PVI. The region around the PVs was divided into eight segments: roof, anterior‐superior, anterior‐carina, anterior‐inferior, bottom, posterior‐inferior, posterior‐carina, and posterior‐superior segment. The lesion width and lesion gap in each segment were compared between the two groups. Lesion gaps were defined as no‐enhancement sites of >4 mm. Results As compared to the RF group, the overall lesion width was significantly wider and lesion gaps significantly fewer at the anterior‐superior segment of the left PV (LAS) and anterior‐inferior segment of the right PV (RAI) in the CB group (lesion width: 8.2 ± 2.2 mm vs 5.6 ± 2.0 mm, P = .001; lesion gap at LAS: 7% vs 38%, P = .02; lesion gap at RAI: 7% vs 46%, P = .006). Conclusions The PVI lesions after CB ablation were characterized by extremely wider and more continuous lesions than those after RF ablation.
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Affiliation(s)
- Jun Kurose
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Kunihiko Kiuchi
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Koji Fukuzawa
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Shumpei Mori
- Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Hirotoshi Ichibori
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Hiroki Konishi
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Yayoi Taniguchi
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Kiyohiro Hyogo
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Hiroshi Imada
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Hideya Suehiro
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Yu-Ichi Nagamatsu
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Tomomi Akita
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Makoto Takemoto
- Section of Arrhythmia Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Ken-Ichi Hirata
- Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Shinsuke Shimoyama
- Department of Radiology Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Yoshiaki Watanabe
- Department of Radiology Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Tatsuya Nishii
- Department of Radiology Kobe University Graduate School of Medicine Chuo-ku Kobe city Japan
| | - Noriyuki Negi
- Division of Radiology Center for Radiology and Radiation Oncology Kobe University Hospital Chuo-ku Kobe city Japan
| | - Katsusuke Kyotani
- Division of Radiology Center for Radiology and Radiation Oncology Kobe University Hospital Chuo-ku Kobe city Japan
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Akashi M, Sekitani T, Ohtsuki Y, Kakei Y, Kusumoto J, Hasegawa T, Maeda M, Negi N, Hashikawa K, Shibuya Y, Takahashi S, Komori T. Axial four-dimensional computed tomographic images to analyze crosswise differences in protrusive condylar movement in patients who underwent mandibulectomy and free flap reconstruction. J Craniomaxillofac Surg 2017; 45:1778-1783. [DOI: 10.1016/j.jcms.2017.08.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 07/27/2017] [Accepted: 08/23/2017] [Indexed: 11/26/2022] Open
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Wang T, Ishihara T, Kono A, Yoshida N, Akasaka H, Mukumoto N, Yada R, Ejima Y, Yoshida K, Miyawaki D, Kakutani K, Nishida K, Negi N, Minami T, Aoyama Y, Takahashi S, Sasaki R. Application of dual-energy CT to suppression of metal artefact caused by pedicle screw fixation in radiotherapy: a feasibility study using original phantom. Phys Med Biol 2017; 62:6226-6245. [PMID: 28675378 DOI: 10.1088/1361-6560/aa7d7f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The objective of the present study was the determination of the potential dosimetric benefits of using metal-artefact-suppressed dual-energy computed tomography (DECT) images for cases involving pedicle screw implants in spinal sites. A heterogeneous spinal phantom was designed for the investigation of the dosimetric effect of the pedicle-screw-related artefacts. The dosimetric comparisons were first performed using a conventional two-directional opposed (AP-PA) plan, and then a volumetric modulated arc therapy (VMAT) plan, which are both used for the treatment of spinal metastases in our institution. The results of Acuros® XB dose-to-medium (Dm) and dose-to-water (Dw) calculations using different imaging options were compared with experimental measurements including the chamber and film dosimetries in the spinal phantom. A dual-energy composition image with a weight factor of -0.2 and a dual-energy monochromatic image (DEMI) with an energy level of 180 keV were found to have superior abilities for artefact suppression. The Dm calculations revealed greater dosimetric effects of the pedicle screw-related artefacts compared to the Dw calculations. The results of conventional single-energy computed tomography showed that, although the pedicle screws were made from low-Z titanium alloy, the metal artefacts still have dosimetric effects, namely, an average (maximum) Dm error of 4.4% (5.6%) inside the spinal cord for a complex VMAT treatment plan. Our findings indicate that metal-artefact suppression using the proposed DECT (DEMI) approach is promising for improving the dosimetric accuracy near the implants and inside the spinal cord (average (maximum) Dm error of 1.1% (2.0%)).
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Affiliation(s)
- Tianyuan Wang
- Division of Radiation Oncology, Kobe University Graduate School of Medicine, 7-5-2 Kusunokicho, Chuouku, Kobe, Hyogo 650-0017, Japan
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Singh N, Negi N, Srivastava K, Agarwal G. A cohort study of vulvar cancer over a period of 10 years and review of literature. Indian J Cancer 2017; 53:412-415. [PMID: 28244472 DOI: 10.4103/0019-509x.200656] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE The objective of this study was to study the risk factors, management protocols, and the outcome of vulvar cancer cases over a period of 10 years in a tertiary care hospital. METHODOLOGY It is a retrospective cohort study. The hospital records of 41 patients with histologically proven vulvar cancer were studied from the Department of Obstetrics and Gynaecology and the Department of Radiotherapy (RT). The presence of risk factors, stage of disease, treatment modalities used, and disease outcomes in terms of survival were studied. The data collected were analyzed and compared with the published literature. RESULTS The mean age for the diagnosis of vulvar cancer was 52 years and the peak incidence was seen in the age group of 50-70 years. Incidence was significantly more in multiparous (P = 0.001) and postmenopausal women (P = 0.007). An average of 4.1 cases were seen per year. Nearly, 97.56% of the cases were squamous cell carcinomas. Twenty cases belonged to the early stage of the disease (Stage I and II) whereas 21 cases had advanced disease (Stage III and IV). Nearly, 48.78% of the cases were primarily treated with surgery, 26.83% with RT, 7.3% with chemotherapy, and 17.07% with combined chemoradiation. Seventy-eight percent of the surgically treated cases had a mean survival of 5 years. Mean survival of 1 year was recorded in advanced disease cases. Limitation of the study was poor follow-up after treatment. CONCLUSION Incidence of vulvar cancer is significantly high in multiparous and postmenopausal women. Conservative surgical treatment is the best option in the early stage of the disease (Stage I and II) and gives high survival rates whereas advanced disease treated with chemoradiation has a poor survival.
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Affiliation(s)
- N Singh
- Department of Obstetrics and Gynaecology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - N Negi
- Department of Obstetrics and Gynaecology, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - K Srivastava
- Department of Radiotherapy, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - G Agarwal
- Department of Obstetrics and Gynaecology, King George's Medical University, Lucknow, Uttar Pradesh, India
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Sofue K, Yoshikawa T, Ohno Y, Negi N, Inokawa H, Sugihara N, Sugimura K. Improved image quality in abdominal CT in patients who underwent treatment for hepatocellular carcinoma with small metal implants using a raw data-based metal artifact reduction algorithm. Eur Radiol 2016; 27:2978-2988. [DOI: 10.1007/s00330-016-4660-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 11/14/2016] [Accepted: 11/16/2016] [Indexed: 12/13/2022]
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Akashi M, Shibuya Y, Takahashi S, Hashikawa K, Hasegawa T, Kakei Y, Negi N, Sekitani T, Komori T. Four-dimensional computed tomography evaluation of jaw movement following mandibular reconstruction: A pilot study. J Craniomaxillofac Surg 2016; 44:637-41. [DOI: 10.1016/j.jcms.2016.01.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 01/11/2016] [Accepted: 01/26/2016] [Indexed: 10/22/2022] Open
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Nishii T, Kono AK, Tani W, Suehiro E, Negi N, Takahashi S, Sugimura K. Four-dimensional noise reduction using the time series of medical computed tomography datasets with short interval times: a static-phantom study. PeerJ 2016; 4:e1680. [PMID: 26893966 PMCID: PMC4756736 DOI: 10.7717/peerj.1680] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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] [Received: 10/24/2015] [Accepted: 01/21/2016] [Indexed: 12/04/2022] Open
Abstract
Backgrounds. This study examines the hypothesis that four-dimensional noise reduction (4DNR) with short interval times reduces noise in cardiac computed tomography (CCT) using “padding” phases. Furthermore, the capability of reducing the reduction dose in CCT using this post-processing technique was assessed. Methods. Using base and quarter radiation doses for CCT (456 and 114 mAs/rot with 120 kVp), a static phantom was scanned ten times with retrospective electrocardiogram gating, and 4DNR with short interval times (50 ms) was performed using a post-processing technique. Differences in the computed tomography (CT) attenuation, contrast-to-noise ratio (CNR) and spatial resolution with modulation transfer function in each dose image obtained with and without 4DNR were assessed by conducting a Tukey–Kramer’s test and non-inferiority test. Results. For the base dose, by using 4DNR, the CNR was improved from 1.18 ± 0.15 to 2.08 ± 0.20 (P = 0.001), while the CT attenuation and spatial resolution of the image of 4DNR did not were significantly inferior to those of reference image (P < 0.001). CNRs of the quarter-dose image in 4DNR also improved to 1.28 ± 0.11, and were not inferior to those of the non-4DNR images of the base dose (P < 0.001). Conclusions. 4DNR with short interval times significantly reduced noise. Furthermore, applying this method to CCT would have the potential of reducing the radiation dose by 75%, while maintaining a similar image noise level.
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Affiliation(s)
- Tatsuya Nishii
- Department of Radiology, Kobe University Graduate School of Medicine , Kobe , Japan
| | - Atsushi K Kono
- Department of Radiology, Kobe University Graduate School of Medicine , Kobe , Japan
| | - Wakiko Tani
- Division of Radiology, Center for Radiology and Radiation Oncology, Kobe University Hospital , Kobe , Japan
| | - Erina Suehiro
- Division of Radiology, Center for Radiology and Radiation Oncology, Kobe University Hospital , Kobe , Japan
| | - Noriyuki Negi
- Division of Radiology, Center for Radiology and Radiation Oncology, Kobe University Hospital , Kobe , Japan
| | - Satoru Takahashi
- Department of Radiology, Kobe University Graduate School of Medicine , Kobe , Japan
| | - Kazuro Sugimura
- Department of Radiology, Kobe University Graduate School of Medicine , Kobe , Japan
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Koyama H, Ohno Y, Fujisawa Y, Seki S, Negi N, Murakami T, Yoshikawa T, Sugihara N, Nishimura Y, Sugimura K. 3D lung motion assessments on inspiratory/expiratory thin-section CT: Capability for pulmonary functional loss of smoking-related COPD in comparison with lung destruction and air trapping. Eur J Radiol 2015; 85:352-9. [PMID: 26781140 DOI: 10.1016/j.ejrad.2015.11.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 08/05/2015] [Revised: 11/14/2015] [Accepted: 11/20/2015] [Indexed: 10/22/2022]
Abstract
PURPOSE To evaluate the utility of three-dimensional (3D) lung motion on inspiratory and expiratory CT for pulmonary functional loss in smoking-related COPD in comparison with lung destruction and air trapping assessments. METHOD AND MATERIALS Forty-four consecutive smokers and COPD patients prospectively underwent inspiratory and expiratory CT. A 3D motion vector map was generated from these CTs, and regional motion magnitudes were measured at the horizontal axis (X-axis), the ventrodorsal axis (Y-axis), and the craniocaudal axis (Z-axis). All mean magnitudes within the entire lung (MMLX, MMLY, and MMLZ) were normalized by expiratory CT lung volume. Moreover, CT-based functional lung volume (FLV) on inspiratory CT and air trapping lung volume (ATLV) on expiratory CT were assessed quantitatively. To evaluate the capability for pulmonary function loss assessment, all MMLs were correlated with pulmonary function tests. Then, discrimination analysis was performed to determine the concordance capability for clinical stage, and correct classification capabilities were compared by means of McNemar's test. RESULTS Multiple regression analysis showed MMLY (β=0.657, p<0.001) and FLV (β=0.375, p=0.019) were correlated with percentage of predicted forced expiratory volume in 1 second. Correct classification capabilities using patient characteristics and MMLs (68.2 (30/44)%) were significantly higher than those obtained by patient characteristics, FLV, and ATLV (54.5 (24/44)%), p=0.031). CONCLUSION 3D lung motion parameter assessment is useful for smoking-related COPD assessment as well as lung parenchymal destruction and/or air trapping evaluations.
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Affiliation(s)
- Hisanobu Koyama
- Division of Radiology, Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan.
| | - Yoshiharu Ohno
- Advanced Biomedical Imaging Research Center, Kobe University Graduate School of Medicine, Kobe, Japan; Division of Functional and Diagnostic Imaging Research, Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yasuko Fujisawa
- Toshiba Medical Systems Corporation, Otawara, Tochigi, Japan
| | - Shinichiro Seki
- Division of Radiology, Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Noriyuki Negi
- Center for Radiology and Radiation Oncology, Kobe University Hospital, Japan
| | - Tohru Murakami
- Center for Radiology and Radiation Oncology, Kobe University Hospital, Japan
| | - Takeshi Yoshikawa
- Advanced Biomedical Imaging Research Center, Kobe University Graduate School of Medicine, Kobe, Japan; Division of Functional and Diagnostic Imaging Research, Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Naoki Sugihara
- Toshiba Medical Systems Corporation, Otawara, Tochigi, Japan
| | - Yoshihiro Nishimura
- Division of Respiratory Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kazuro Sugimura
- Division of Radiology, Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
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Nishii T, Kono AK, Nishio M, Negi N, Fujita A, Kohmura E, Sugimura K. Bone-Subtracted Spinal CT Angiography Using Nonrigid Registration for Better Visualization of Arterial Feeders in Spinal Arteriovenous Fistulas. AJNR Am J Neuroradiol 2015; 36:2400-6. [PMID: 26251431 DOI: 10.3174/ajnr.a4435] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 03/29/2015] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Pretreatment diagnosis for the location of shunts and arterial feeders of spinal arteriovenous fistulas is crucial. This study aimed to evaluate the utility of subtracted CT angiography imaging by using nonrigid registration (R-CTA) in patients with spinal arteriovenous fistulas compared with conventional CTA imaging. MATERIALS AND METHODS The records of 15 consecutive subjects (mean age, 65 years; 2 women) who had undergone CTA and digital subtraction angiography for clinically suspected spinal arteriovenous fistula were reviewed. From CTA images obtained at the arterial and late arterial phases, warped images of the late arterial phase were obtained by using nonrigid registration that was adjusted to the arterial phase images. R-CTA images were then obtained by subtracting the warped images from the arterial phase images. The accuracies of using nonrigid registration and conventional spinal CTA and the time required for detecting arterial feeders in spinal arteriovenous fistulas were analyzed for each patient with DSA results as a standard reference. The difference between R-CTA and conventional spinal CTA was assessed by the Welch test and the McNemar χ(2) test. RESULTS R-CTA had a higher accuracy compared with conventional spinal CTA (80% versus 47%, P = .025). The time for interpretation was reduced in R-CTA compared with conventional spinal CTA (45.1 versus 97.1 seconds, P = .002). CONCLUSIONS Our subtracted CTA imaging by using nonrigid registration detects feeders of spinal arteriovenous fistulas more accurately and quickly than conventional CTA.
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Affiliation(s)
- T Nishii
- From the Departments of Radiology (T.N., A.K.K., M.N., K.S.)
| | - A K Kono
- From the Departments of Radiology (T.N., A.K.K., M.N., K.S.)
| | - M Nishio
- From the Departments of Radiology (T.N., A.K.K., M.N., K.S.)
| | - N Negi
- Division of Radiology (N.N.), Center for Radiology and Radiation Oncology, Kobe University Hospital, Kobe, Japan
| | - A Fujita
- Neurosurgery (A.F., E.K.), Kobe University Graduate School of Medicine, Kobe, Japan
| | - E Kohmura
- Neurosurgery (A.F., E.K.), Kobe University Graduate School of Medicine, Kobe, Japan
| | - K Sugimura
- From the Departments of Radiology (T.N., A.K.K., M.N., K.S.)
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Nishii T, Kono AK, Negi N, Hashimura H, Uotani K, Okita Y, Sugimura K. The feasibility of a 64-slice MDCT for detection of the Adamkiewicz artery: comparison of the detection rate of intravenous injection CT angiography using a 64-slice MDCT versus intra-arterial and intravenous injection CT angiography using a 16-slice MDCT. Int J Cardiovasc Imaging 2013; 29 Suppl 2:127-33. [DOI: 10.1007/s10554-013-0301-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 09/25/2013] [Indexed: 10/26/2022]
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Kumari V, Banerjee T, Negi N, Gupta MI, Tiwari K, Gupta M. Human fascioliasis with biliary complications. J Commun Dis 2013; 45:91-93. [PMID: 25141559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report a case of human fascioliasis adding to the few of the previously reported cases in India. A young boy from rural background in Bihar presented with diarrhea, vomiting, hepatic tenderness, jaundice and fever along with peripheral eosinophilia. Examination of stool revealed yellow-brown eggs of Fasciola hepatica. Human fascioliasis should be kept in mind in patients with cholangitis and eosinophilia especially in areas of sporadic occurrence.
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Negi N, Yoshikawa T, Ohno Y, Somiya Y, Sekitani T, Sugihara N, Koyama H, Kanda T, Kanata N, Murakami T, Kawamitsu H, Sugimura K. Hepatic CT perfusion measurements: a feasibility study for radiation dose reduction using new image reconstruction method. Eur J Radiol 2012; 81:3048-54. [PMID: 22613507 DOI: 10.1016/j.ejrad.2012.04.024] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Revised: 04/22/2012] [Accepted: 04/23/2012] [Indexed: 12/27/2022]
Abstract
OBJECTIVES To assess the effects of image reconstruction method on hepatic CT perfusion (CTP) values using two CT protocols with different radiation doses. MATERIALS AND METHODS Sixty patients underwent hepatic CTP and were randomly divided into two groups. Tube currents of 210 or 250 mA were used for the standard dose group and 120 or 140 mA for the low dose group. The higher currents were selected for large patients. Demographic features of the groups were compared. CT images were reconstructed by using filtered back projection (FBP), image filter (quantum de-noising, QDS), and adaptive iterative dose reduction (AIDR). Hepatic arterial and portal perfusion (HAP and HPP, ml/min/100ml) and arterial perfusion fraction (APF, %) were calculated using the dual-input maximum slope method. ROIs were placed on each hepatic segment. Perfusion and Hounsfield unit (HU) values, and image noises (standard deviations of HU value, SD) were measured and compared between the groups and among the methods. RESULTS There were no significant differences in the demographic features of the groups, nor were there any significant differences in mean perfusion and HU values for either the groups or the image reconstruction methods. Mean SDs of each of the image reconstruction methods were significantly lower (p<0.0001) for the standard dose group than the low dose group, while mean SDs for AIDR were significantly lower than those for FBP for both groups (p=0.0006 and 0.013). Radiation dose reductions were approximately 45%. CONCLUSIONS Image reconstruction method did not affect hepatic perfusion values calculated by dual-input maximum slope method with or without radiation dose reductions. AIDR significantly reduced images noises.
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Affiliation(s)
- Noriyuki Negi
- Division of Radiology, Kobe University Hospital, Department of Radiology, Kobe University Graduate School of Medicine, 7-5-2 Kusunokicho, Chuoku, Kobe 650-0017, Japan.
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Negi D, Kumar A, Sharma R, Shukla N, Negi N, Tamta M, Bansal Y, Prasert PG, Cairns JK. Structure Confirmation of Rare Conjugate Glycosides from Glycosmis arborea (Roxb.) with the Action of β-Glucosidases. ACTA ACUST UNITED AC 2011. [DOI: 10.3923/rjphyto.2011.32.40] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Negi N, Koto M, Shite J, Sawada T, Kawamitsu H. [Examination of accuracy and factors influencing optical coherence tomography(OCT)measurements]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2009; 65:1041-1047. [PMID: 19721312 DOI: 10.6009/jjrt.65.1041] [Citation(s) in RCA: 1] [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: 05/28/2023]
Abstract
INTRODUCTION Optical coherence tomography (OCT) is a new imaging modality with increasing clinical application. In the present study, we examined the accuracy and factors influencing the OCT measurements (luminal diameter, area, and stent strut thickness). METHODS We evaluated several luminal sizes of phantom model by OCT with several situations (frame-rate: 8.2 or 15.6 F/s; pullback-speed: 1.0 or 2.0 mm/s; position of Image Wire: in-center; off-center) and compared them with the actual value and the intravascular ultrasound measurements. We also evaluated the accuracy of the stent strut thickness (5 bare metal stents and 2 drug eluting stents) in stents that were implanted to phantom models. RESULTS The accuracy of OCT measurements was affected by frame-rate and the position of OCT Image Wire. The distortion and the change in brightness of the OCT image were detected when the Image Wire was positioned off-center, especially at low frame-rate. In this condition, OCT measured the luminal diameter and area larger than the actual size. As for the strut thickness, when we unified the measurement points of the stent strut surface, the precision of the OCT measurements was satisfactory. CONCLUSION We revealed that the precision of the OCT measurements was satisfactory. However, we should note that the OCT measurements were affected by frame-rate and position of the Image Wire.
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Sawada T, Shite J, Negi N, Shinke T, Tanino Y, Ogasawara D, Kawamori H, Kato H, Miyoshi N, Yoshino N, Kozuki A, Koto M, Hirata KI. Factors That Influence Measurements and Accurate Evaluation of Stent Apposition by Optical Coherence Tomography Assessment Using a Phantom Model. Circ J 2009; 73:1841-7. [DOI: 10.1253/circj.cj-09-0113] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Takahiro Sawada
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Junya Shite
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Noriyuki Negi
- Department of Radiological Technology, Kobe University Hospital
| | - Toshiro Shinke
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Yusuke Tanino
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Daisuke Ogasawara
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Hiroyuki Kawamori
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Hiroki Kato
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Naoki Miyoshi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Naoki Yoshino
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Amane Kozuki
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
| | - Masanobu Koto
- Department of Radiological Technology, Kobe University Hospital
| | - Ken-ichi Hirata
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine
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Polampalli S, Choughule A, Negi N, Shinde S, Baisane C, Amre P, Subramanian PG, Gujral S, Prabhash K, Parikh P. Analysis and comparison of clinicohematological parameters and molecular and cytogenetic response of two Bcr/Abl fusion transcripts. Genet Mol Res 2008; 7:1138-49. [PMID: 19048492 DOI: 10.4238/vol7-4gmr485] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Different forms of p210 are produced by alternative splicing, namely b2a2 and b3a2. There have been many contrasting data establishing a relationship between the two Bcr/Abl transcripts and platelet counts and also response to treatment. However, the data published to date have been on a small group of patients. The aim of the present study was to determine whether there was any difference between clinical and hematological parameters at diagnosis between the two Bcr/Abl fusion transcripts in our population, and whether the two transcripts responded differently or similarly to imatinib treatment. RT-PCR was performed in 202 cases for detection of Bcr/Abl transcripts in newly diagnosed chronic myelogenous leukemia cases in one year. The two transcripts were compared and correlated with clinical, hematological and FISH data and with response to treatment. A total of 138 cases were of b3a2 and 64 were of b2a2 transcript. There was no correlation between the hematological parameters and the type of transcript. There was a significant association of blast crisis with b2a2, especially with myeloid blast crisis. When compared to FISH results, 10% of b3a2 were found to have a significant association with 5'Abl deletion as compared to 3% of b2a2. On analyzing the therapeutic response, we did not find any difference between the two transcripts. In conclusion, our findings confirm that the b3a2 type transcript is not significantly associated with thrombocytosis, that the short transcript, b2a2, occurs with acute phase, i.e., blast crisis, and that there is no difference in treatment response between the two transcripts. However, further studies are required to understand the molecular pathways involved in the Bcr/Abl mechanism.
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Affiliation(s)
- S Polampalli
- Department of Medical Oncology, Molecular Biology Laboratory, Tata Memorial Hospital, Mumbai, India.
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Affiliation(s)
- M Kidwai
- Department of Chemistry, University of Delhi, India
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Badhu BP, Kumar S, Negi N. Ocular Tuberculosis. JNMA J Nepal Med Assoc 1970. [DOI: 10.31729/jnma.760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Ocular tuberculosis is a challenge in ophthalmic practice because it is extremely difficult to diagnose it.The term ocular tuberculosis indicates any infection by Mycobacterium tuberculosis in, on, or around theeye. It tends to affect all the structures of the eye. Clinical manifestations of ocular tuberculosis depends onthe site and severity of its infection. Diagnosis of ocular tuberculosis is entirely clinical, thoughinvestigation should be made to confirm the diagnosis. Treatment of ocular tuberculosis is the same as forthat of pulmonary tuberculosis.
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