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Tsuchiya M, Masui T, Katayama M, Hayashi Y, Yamada T, Terauchi K, Kawamura K, Ishikawa R, Mizobe H, Yamamichi J, Sakahara H, Goshima S. Temporal subtraction of low-dose and relatively thick-slice CT images with large deformation diffeomorphic metric mapping and adaptive voxel matching for detection of bone metastases: A STARD-compliant article. Medicine (Baltimore) 2020; 99:e19538. [PMID: 32195958 PMCID: PMC7220493 DOI: 10.1097/md.0000000000019538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
To evaluate the improvement of radiologist performance in detecting bone metastases at follow up low-dose computed tomography (CT) by using a temporal subtraction (TS) technique based on an advanced nonrigid image registration algorithm.Twelve patients with bone metastases (males, 5; females, 7; mean age, 64.8 ± 7.6 years; range 51-81 years) and 12 control patients without bone metastases (males, 5; females, 7; mean age, 64.8 ± 7.6 years; 51-81 years) were included, who underwent initial and follow-up CT examinations between December 2005 and July 2016. Initial CT images were registered to follow-up CT images by the algorithm, and TS images were created. Three radiologists independently assessed the bone metastases with and without the TS images. The reader averaged jackknife alternative free-response receiver operating characteristics figure of merit was used to compare the diagnostic accuracy.The reader-averaged values of the jackknife alternative free-response receiver operating characteristics figures of merit (θ) significantly improved from 0.687 for the readout without TS and 0.803 for the readout with TS (P value = .031. F statistic = 5.24). The changes in the absolute value of CT attenuations in true-positive lesions were significantly larger than those in false-negative lesions (P < .001). Using TS, segment-based sensitivity, specificity, accuracy, positive predictive value, and negative predictive value of the readout with TS were 66.7%, 98.9%, 94.4%, 90.9%, and 94.8%, respectively.The TS images can significantly improve the radiologist's performance in the detection of bone metastases on low-dose and relatively thick-slice CT.
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Affiliation(s)
- Mitsuteru Tsuchiya
- Department of Diagnostic Radiology and Nuclear Medicine, Graduate School of Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku
| | - Takayuki Masui
- Department of Radiology, Seirei Hamamatsu General Hospital, 2-12-12, Sumiyoshi, Naka-ku, Hamamatsu City, Shizuoka
| | - Motoyuki Katayama
- Department of Radiology, Seirei Hamamatsu General Hospital, 2-12-12, Sumiyoshi, Naka-ku, Hamamatsu City, Shizuoka
| | - Yuki Hayashi
- Department of Radiology, Seirei Hamamatsu General Hospital, 2-12-12, Sumiyoshi, Naka-ku, Hamamatsu City, Shizuoka
| | - Takahiro Yamada
- Department of Radiology, Seirei Hamamatsu General Hospital, 2-12-12, Sumiyoshi, Naka-ku, Hamamatsu City, Shizuoka
| | - Kazuma Terauchi
- Department of Radiology, Seirei Hamamatsu General Hospital, 2-12-12, Sumiyoshi, Naka-ku, Hamamatsu City, Shizuoka
| | - Kenshi Kawamura
- Department of Radiology, Seirei Hamamatsu General Hospital, 2-12-12, Sumiyoshi, Naka-ku, Hamamatsu City, Shizuoka
| | - Ryo Ishikawa
- Medical Imaging Information Technology Development Department Canon Inc.70-1, Yanagi-cho, Saiwai-ku, Kawasaki-shi, Kanagawa
| | - Hideaki Mizobe
- Medical Imaging Information Technology Development Department Canon Inc.70-1, Yanagi-cho, Saiwai-ku, Kawasaki-shi, Kanagawa
| | - Junta Yamamichi
- Medical Imaging Information Technology Development Department Canon Inc.70-1, Yanagi-cho, Saiwai-ku, Kawasaki-shi, Kanagawa
| | - Harumi Sakahara
- Department of Diagnostic Radiology and Nuclear Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu City, Shizuoka, Japan
| | - Satoshi Goshima
- Department of Diagnostic Radiology and Nuclear Medicine, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu City, Shizuoka, Japan
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Kato T, Nagata K, Yamamichi J, Tanaka S, Honda T, Shimizu N, Utano K, Hirayama M, Matsumoto H, Horita S. Preference and Experience of Colonic Examination for Participants Presenting to Hospitals with a Positive Fecal Immunochemical Test Result. Patient Prefer Adherence 2020; 14:2017-2025. [PMID: 33122895 PMCID: PMC7588835 DOI: 10.2147/ppa.s267354] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 10/10/2020] [Indexed: 12/24/2022] Open
Abstract
PURPOSE Patients who test positive on the fecal immunochemical test (FIT) for colorectal cancer (CRC) are referred for colonoscopy for further diagnostic evaluation. Colonoscopy is not a perfect method and may be a challenge for some FIT-positive patients. Computed tomographic colonography (CTC) is an alternative method that is less invasive and allows examination of the whole colon. The study objective was to evaluate the preference of FIT-positive patients for either colonoscopy or CTC for CRC examination. PATIENTS AND METHODS Individuals older than 40 years with a positive FIT test at eight Japanese hospitals between December 2012 and July 2015 were invited to participate. Participants were given detailed information regarding colonoscopy and CTC before deciding on either examination. They completed questionnaires before the procedure regarding their preference and after the procedure regarding their experience. RESULTS The pre- and post-questionnaires of 846 and 834 participants, respectively, were analyzed. Participants preferred colonoscopy over CTC (colonoscopy, 72%; CTC, 28%). The possibility of obtaining biopsy samples and removing colorectal polyps during the procedure was the main reason for colonoscopy selection. Patients selected CTC to reduce discomfort but reported that CTC bowel preparation was more burdensome than colonoscopy bowel preparation. The overall experience of the examination did not differ between the groups. CONCLUSION Colonoscopy is the standard examination for FIT-positive patients. However, when given a choice, almost one-third of participants chose CTC because they thought it would be a more "comfortable" examination. Clinicians should therefore be aware of patients' potential preference for noninvasive colorectal examinations.
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Affiliation(s)
- Takashi Kato
- Department of Internal Medicine, Hokkaido Gastroenterological Hospital, Sapporo, Japan
- Correspondence: Takashi KatoDepartment of Internal Medicine, Hokkaido Gastroenterological Hospital, Sapporo, Hokkaido065-0041, JapanTel +8111-784-1811Fax +8111-784-1838 Email
| | - Koichi Nagata
- Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
- Cancer Screening Center, National Cancer Center Hospital, Tokyo, Japan
| | - Junta Yamamichi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Soichi Tanaka
- Department of Coloproctology, Matsuaikai Matsuda Hospital, Hamamatsu, Japan
| | - Tetsuro Honda
- Department of Gastroenterology, Nagasaki Harbor Medical Center, Nagasaki, Japan
| | - Norihito Shimizu
- Department of Radiology, Medical Corporation Matsuoka Clinic, Nara, Japan
| | - Kenichi Utano
- Department of Coloproctology, Aizu Medical Center, Fukushima Medical University, Aizuwakamatsu, Fukushima, Japan
| | | | - Hiroshi Matsumoto
- Department of Gastroenterology, Kawasaki Medical University School of Medicine, Kurashiki, Japan
| | - Shoichi Horita
- Department of Internal Medicine, Hokkaido Gastroenterological Hospital, Sapporo, Japan
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Yamamichi J, Kawaguchi Y, Otsuka T, Nakashita S, Mizobe H, Eguchi Y, Kimura S. Assessment of tumor volume and density as a measure of the response of advanced hepatocellular carcinoma to sorafenib: Application of automated measurements on computed tomography scans. JGH Open 2019; 4:145-152. [PMID: 32280757 PMCID: PMC7144795 DOI: 10.1002/jgh3.12230] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 06/28/2019] [Accepted: 07/01/2019] [Indexed: 12/14/2022]
Abstract
Background and Aim To better predict patient survival, we used automated tumor volume and density measurements to make an objective radiological assessment of the response of advanced hepatocellular carcinoma (HCC) to treatment with sorafenib. Methods Patients treated with sorafenib were identified retrospectively. Those who were diagnosed with Child‐Pugh class A liver function, Barcelona‐Clinic Liver Cancer stage C, and Eastern Cooperative Oncology Group performance status grade 0/1 were enrolled (n = 22). Reviews of contrast‐enhanced computed tomography images were supported by the automated measurement of lesions using computer software. Treatment responses were assessed using volume and density criteria. Kaplan–Meier methods and multivariate Cox regression analysis were used to evaluate treatment responses and identify the most significant prognostic factors for overall survival (OS). Results After patients were dichotomized according to volume and density criteria, the median OS for those with an objective response (OR) (complete response + partial response) was 20.4 months and that for those with a non‐OR (stable disease + progressive disease) was 9.3 months (P = 0.009). The best multivariate regression model for survival identified volume and density criteria (OR or non‐OR) as a significant variable, along with baseline alpha‐fetoprotein levels (log‐rank test, P = 0.01). No other conventional criteria were identified as significant. Conclusions Tumor volume and density assessment using automated lesion measurements may be an objective method of evaluating responses of advanced HCC to treatment with sorafenib.
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Affiliation(s)
- Junta Yamamichi
- Medical Equipment Business Planning Department, Medical Systems Operations Canon Inc. Tokyo Japan
| | - Yasunori Kawaguchi
- Department of Hepatobiliary and Pancreatology Saga-ken Medical Centre Koseikan Saga Japan
| | - Taiga Otsuka
- Department of Oncology Saga-ken Medical Centre Koseikan Saga Japan
| | - Shunya Nakashita
- Department of Hepatobiliary and Pancreatology Saga-ken Medical Centre Koseikan Saga Japan
| | - Hideaki Mizobe
- Medical Equipment Business Planning Department, Medical Systems Operations Canon Inc. Tokyo Japan
| | - Yuichiro Eguchi
- Department of Internal Medicine, Faculty of Medicine Saga University Saga Japan
| | - Shinya Kimura
- Department of Internal Medicine, Faculty of Medicine Saga University Saga Japan
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Kakinuma R, Muramatsu Y, Yamamichi J, Gomi S, Oubel E, Moriyama N. Evaluation of the 95% limits of agreement of the volumes of 5-year clinically stable solid nodules for the development of a follow-up system for indeterminate solid nodules in CT lung cancer screening. J Thorac Dis 2018; 10:175-189. [PMID: 29600047 DOI: 10.21037/jtd.2017.11.142] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background This study sought to evaluate the 95% limits of agreement of the volumes of 5-year clinically stable solid nodules for the development of a follow-up system for indeterminate solid nodules. Methods The volumes of 226 solid nodules that had been clinically stable for 5 years were measured in 186 patients (53 female never-smokers, 36 male never-smokers, 51 males with <30 pack-years, and 46 males with ≥30 pack-years) using a three-dimensional semiautomated method. Volume changes were evaluated using three methods: percent change, proportional change and growth rate. The 95% limits of agreement were evaluated using the Bland-Altman method. Results The 95% limits of agreement were as follows: range of percent change, from ±34.5% to ±37.8%; range of proportional change, from ±34.1% to ±36.8%; and range of growth rate, from ±39.2% to ±47.4%. Percent change-based, proportional change-based, and growth rate-based diagnoses of an increase or decrease in ten solid nodules were made at a mean of 302±402, 367±455, and 329±496 days, respectively, compared with a clinical diagnosis made at 809±616 days (P<0.05). Conclusions The 95% limits of agreement for volume change in 5-year stable solid nodules may enable the detection of an increase or decrease in the solid nodule at an earlier stage than that enabled by a clinical diagnosis, possibly contributing to the development of a follow-up system for reducing the number of additional Computed tomography (CT) scans performed during the follow-up period.
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Affiliation(s)
- Ryutaro Kakinuma
- Division of Cancer Screening, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan.,Cancer Screening Center, National Cancer Center, Tokyo, Japan.,Department of Pulmonology, Tokyo General Hospital, Tokyo, Japan
| | - Yukio Muramatsu
- Division of Cancer Screening, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan.,Department of Radiology, E-Medical Tokyo, Tokyo, Japan
| | - Junta Yamamichi
- Division of Cancer Screening, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan.,Global Healthcare IT Project, Medical Equipment Group, Canon Inc., Tokyo, Japan
| | - Shiho Gomi
- Division of Cancer Screening, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan.,Department of Diagnostic Radiology, National Cancer Center Hospital, Tokyo, Japan
| | - Estanislao Oubel
- MEDIAN Technologies, Valbonne Sophia Antipolis, Valbonne, France
| | - Noriyuki Moriyama
- Division of Cancer Screening, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan.,Department of Radiology, Tokyo Midtown Medical Center, Tokyo, Japan
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Nagata K, Endo S, Honda T, Yasuda T, Hirayama M, Takahashi S, Kato T, Horita S, Furuya K, Kasai K, Matsumoto H, Kimura Y, Utano K, Sugimoto H, Kato H, Yamada R, Yamamichi J, Shimamoto T, Ryu Y, Matsui O, Kondo H, Doi A, Abe T, Yamano HO, Takeuchi K, Hanai H, Saida Y, Fukuda K, Näppi J, Yoshida H. Accuracy of CT Colonography for Detection of Polypoid and Nonpolypoid Neoplasia by Gastroenterologists and Radiologists: A Nationwide Multicenter Study in Japan. Am J Gastroenterol 2017; 112:163-171. [PMID: 27779195 PMCID: PMC5223061 DOI: 10.1038/ajg.2016.478] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 07/01/2016] [Indexed: 12/11/2022]
Abstract
OBJECTIVES The objective of this study was to assess prospectively the diagnostic accuracy of computer-assisted computed tomographic colonography (CTC) in the detection of polypoid (pedunculated or sessile) and nonpolypoid neoplasms and compare the accuracy between gastroenterologists and radiologists. METHODS This nationwide multicenter prospective controlled trial recruited 1,257 participants with average or high risk of colorectal cancer at 14 Japanese institutions. Participants had CTC and colonoscopy on the same day. CTC images were interpreted independently by trained gastroenterologists and radiologists. The main outcome was the accuracy of CTC in the detection of neoplasms ≥6 mm in diameter, with colonoscopy results as the reference standard. Detection sensitivities of polypoid vs. nonpolypoid lesions were also evaluated. RESULTS Of the 1,257 participants, 1,177 were included in the final analysis: 42 (3.6%) were at average risk of colorectal cancer, 456 (38.7%) were at elevated risk, and 679 (57.7%) had recent positive immunochemical fecal occult blood tests. The overall per-participant sensitivity, specificity, and positive and negative predictive values for neoplasms ≥6 mm in diameter were 0.90, 0.93, 0.83, and 0.96, respectively, among gastroenterologists and 0.86, 0.90, 0.76, and 0.95 among radiologists (P<0.05 for gastroenterologists vs. radiologists). The sensitivity and specificity for neoplasms ≥10 mm in diameter were 0.93 and 0.99 among gastroenterologists and 0.91 and 0.98 among radiologists (not significant for gastroenterologists vs. radiologists). The CTC interpretation time by radiologists was shorter than that by gastroenterologists (9.97 vs. 15.8 min, P<0.05). Sensitivities for pedunculated and sessile lesions exceeded those for flat elevated lesions ≥10 mm in diameter in both groups (gastroenterologists 0.95, 0.92, and 0.68; radiologists: 0.94, 0.87, and 0.61; P<0.05 for polypoid vs. nonpolypoid), although not significant (P>0.05) for gastroenterologists vs. radiologists. CONCLUSIONS CTC interpretation by gastroenterologists and radiologists was accurate for detection of polypoid neoplasms, but less so for nonpolypoid neoplasms. Gastroenterologists had a higher accuracy in the detection of neoplasms ≥6 mm than did radiologists, although their interpretation time was longer than that of radiologists.
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Affiliation(s)
- Koichi Nagata
- Japanese CTC Society, Boston, Massachusetts, USA,3D Imaging Research, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Shungo Endo
- Japanese CTC Society, Boston, Massachusetts, USA,Digestive Disease Center, Showa University Northern Yokohama Hospital, Yokohama, Kanagawa, Japan
| | - Tetsuro Honda
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Gastroenterology, Nagasaki Kamigoto Hospital, Shinkamigoto, Minamimatsuura, Nagasaki, Japan
| | - Takaaki Yasuda
- Japanese CTC Society, Boston, Massachusetts, USA,Radiology Section, Nagasaki Kamigoto Hospital, Shinkamigoto, Minamimatsuura, Nagasaki, Japan
| | - Michiaki Hirayama
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Gastroenterology, Otaru Kyokai Hospital, Otaru, Hokkaido, Japan
| | - Sho Takahashi
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Gastroenterology, Otaru Kyokai Hospital, Otaru, Hokkaido, Japan
| | - Takashi Kato
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Gastroenterology, Hokkaido Gastroenterology Hospital, Sapporo, Hokkaido, Japan
| | - Shoichi Horita
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Internal Medicine, Hokkaido Gastroenteology Hospital, Sapporo, Hokkaido, Japan
| | - Ken Furuya
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Gastroenterology and Hepatology, Japan Community Health Care Organization (JCHO) Hokkaido Hospital (formerly known as Hokkaido Social Insurance Hospital), Sapporo, Hokkaido, Japan
| | - Kenji Kasai
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Radiology, Japan Community Health Care Organization (JCHO) Hokkaido Hospital (formerly known as Hokkaido Social Insurance Hospital), Sapporo, Hokkaido, Japan
| | - Hiroshi Matsumoto
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Gastroenterology, Kawasaki Medical School Hospital, Kurashiki, Okayama, Japan
| | - Yoshiki Kimura
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Gastroenterology, Kawasaki Medical School Hospital, Kurashiki, Okayama, Japan
| | - Kenichi Utano
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Radiology, Jichi Medical University Hospital, Shimotsuke, Tochigi, Japan
| | - Hideharu Sugimoto
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Radiology, Jichi Medical University Hospital, Shimotsuke, Tochigi, Japan
| | - Hiroyuki Kato
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Clinical Laboratory and Endoscopy, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Rieko Yamada
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Clinical Laboratory and Endoscopy, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Junta Yamamichi
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, USA
| | - Takeshi Shimamoto
- Department of Medical Statistics and Information, Kameda Medical Center Makuhari, Chiba-city, Chiba, Japan
| | - Yasuji Ryu
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Radiology, Kanazawa University Hospital, Kanazawa, Ishikawa, Japan
| | - Osamu Matsui
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Radiology, Kanazawa University Hospital, Kanazawa, Ishikawa, Japan
| | - Hitoshi Kondo
- Japanese CTC Society, Boston, Massachusetts, USA,Center for Digestive Diseases, Tonan Hospital, Sapporo, Hokkaido, Japan
| | - Ayako Doi
- Japanese CTC Society, Boston, Massachusetts, USA,Center for Digestive Diseases, Tonan Hospital, Sapporo, Hokkaido, Japan
| | - Taro Abe
- Japanese CTC Society, Boston, Massachusetts, USA,Digestive Disease Center, Akita Red Cross Hospital, Akita City, Akita, Japan
| | - Hiro-o Yamano
- Japanese CTC Society, Boston, Massachusetts, USA,Digestive Disease Center, Akita Red Cross Hospital, Akita City, Akita, Japan
| | - Ken Takeuchi
- Japanese CTC Society, Boston, Massachusetts, USA,Center for Gastroenterology and IBD Research, Hamamatsu South Hospital, Hamamatsu, Shizuoka, Japan
| | - Hiroyuki Hanai
- Japanese CTC Society, Boston, Massachusetts, USA,Center for Gastroenterology and IBD Research, Hamamatsu South Hospital, Hamamatsu, Shizuoka, Japan
| | - Yukihisa Saida
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Radiology, St Luke's International Hospital, Tokyo, Japan
| | - Katsuyuki Fukuda
- Japanese CTC Society, Boston, Massachusetts, USA,Department of Gastroenterology, St Luke's International Hospital, Tokyo, Japan
| | - Janne Näppi
- 3D Imaging Research, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Hiroyuki Yoshida
- Japanese CTC Society, Boston, Massachusetts, USA,3D Imaging Research, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA,3D Imaging Research, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, 25 New Chardon Street, Suite 400C, Boston, Massachusetts 02114, USA. E-mail:
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Sueoka-Aragane N, Kobayashi N, Bonnard E, Charbonnier C, Yamamichi J, Mizobe H, Kimura S. Evaluation of a cloud-based local-read paradigm for imaging evaluations in oncology clinical trials for lung cancer. Acta Radiol Open 2015; 4:2058460115588103. [PMID: 26668754 PMCID: PMC4668993 DOI: 10.1177/2058460115588103] [Citation(s) in RCA: 4] [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: 10/28/2014] [Accepted: 04/29/2015] [Indexed: 12/27/2022] Open
Abstract
Background Although tumor response evaluated with radiological imaging is frequently used as a primary endpoint in clinical trials, it is difficult to obtain precise results because of inter- and intra-observer differences. Purpose To evaluate usefulness of a cloud-based local-read paradigm implementing software solutions that standardize imaging evaluations among international investigator sites for clinical trials of lung cancer. Material and Methods Two studies were performed: KUMO I and KUMO I Extension. KUMO I was a pilot study aiming at demonstrating the feasibility of cloud implementation and identifying issues regarding variability of evaluations among sites. Chest CT scans at three time-points from baseline to progression, from 10 patients with lung cancer who were treated with EGFR tyrosine kinase inhibitors, were evaluated independently by two oncologists (Japan) and one radiologist (France), through a cloud-based software solution. The KUMO I Extension was performed based on the results of KUMO I. Results KUMO I showed discordance rates of 40% for target lesion selection, 70% for overall response at the first time-point, and 60% for overall response at the second time-point. Since the main reason for the discordance was differences in the selection of target lesions, KUMO I Extension added a cloud-based quality control service to achieve a consensus on the selection of target lesions, resulting in an improved rate of agreement of response evaluations. Conclusion The study shows the feasibility of imaging evaluations at investigator sites, based on cloud services for clinical studies involving multiple international sites. This system offers a step forward in standardizing evaluations of images among widely dispersed sites.
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Affiliation(s)
- Naoko Sueoka-Aragane
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Naomi Kobayashi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Eric Bonnard
- Radiology Department, NICE University Hospital, France
| | | | | | | | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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7
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Oubel E, Bonnard E, Sueoka-Aragane N, Kobayashi N, Charbonnier C, Yamamichi J, Mizobe H, Kimura S. Volume-based response evaluation with consensual lesion selection: a pilot study by using cloud solutions and comparison to RECIST 1.1. Acad Radiol 2015; 22:217-25. [PMID: 25488429 DOI: 10.1016/j.acra.2014.09.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 09/05/2014] [Accepted: 09/20/2014] [Indexed: 12/11/2022]
Abstract
RATIONALE AND OBJECTIVES Lesion volume is considered as a promising alternative to Response Evaluation Criteria in Solid Tumors (RECIST) to make tumor measurements more accurate and consistent, which would enable an earlier detection of temporal changes. In this article, we report the results of a pilot study aiming at evaluating the effects of a consensual lesion selection on volume-based response (VBR) assessments. MATERIALS AND METHODS Eleven patients with lung computed tomography scans acquired at three time points were selected from Reference Image Database to Evaluate Response to therapy in lung cancer (RIDER) and proprietary databases. Images were analyzed according to RECIST 1.1 and VBR criteria by three readers working in different geographic locations. Cloud solutions were used to connect readers and carry out a consensus process on the selection of lesions used for computing response. Because there are not currently accepted thresholds for computing VBR, we have applied a set of thresholds based on measurement variability (-35% and +55%). The benefit of this consensus was measured in terms of multiobserver agreement by using Fleiss kappa (κfleiss) and corresponding standard errors (SE). RESULTS VBR after consensual selection of target lesions allowed to obtain κfleiss = 0.85 (SE = 0.091), which increases up to 0.95 (SE = 0.092), if an extra consensus on new lesions is added. As a reference, the agreement when applying RECIST without consensus was κfleiss = 0.72 (SE = 0.088). These differences were found to be statistically significant according to a z-test. CONCLUSIONS An agreement on the selection of lesions allows reducing the inter-reader variability when computing VBR. Cloud solutions showed to be an interesting and feasible strategy for standardizing response evaluations, reducing variability, and increasing consistency of results in multicenter clinical trials.
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Affiliation(s)
- Estanislao Oubel
- R&D Department, MEDIAN Technologies, Les Deux Arcs B, 1800 Route des Crêtes, Valbonne 06560, France.
| | - Eric Bonnard
- Radiology Department, Nice University Hospital, Nice, France
| | - Naoko Sueoka-Aragane
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Naomi Kobayashi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Colette Charbonnier
- R&D Department, MEDIAN Technologies, Les Deux Arcs B, 1800 Route des Crêtes, Valbonne 06560, France
| | - Junta Yamamichi
- Global Healthcare IT Project, Medical Equipment Group, Canon Inc, Tokyo, Japan
| | - Hideaki Mizobe
- Global Healthcare IT Project, Medical Equipment Group, Canon Inc, Tokyo, Japan
| | - Shinya Kimura
- Radiology Department, Nice University Hospital, Nice, France
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Oubel E, Bonnard E, Sueoka-Aragane N, Kobayashi N, Charbonnier C, Yamamichi J, Mizobe H, Kimura S. Volume-based response evaluations with consensual lesion selection using cloud solutions in clinical trials: A pilot study. J Clin Oncol 2014. [DOI: 10.1200/jco.2014.32.15_suppl.e13538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
| | - Eric Bonnard
- Radiology Department, Hôpital Pasteur, Nice, France
| | - Naoko Sueoka-Aragane
- Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Naomi Kobayashi
- Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | | | | | | | - Shinya Kimura
- Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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Yamamichi J, Ojima T, Yurugi K, Iida M, Imamura T, Ashihara E, Kimura S, Maekawa T. Single-step, label-free quantification of antibody in human serum for clinical applications based on localized surface plasmon resonance. Nanomedicine: Nanotechnology, Biology and Medicine 2011; 7:889-95. [DOI: 10.1016/j.nano.2011.02.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Revised: 12/12/2010] [Accepted: 02/01/2011] [Indexed: 10/18/2022]
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Suzumura Y, Kanamori K, Nakanishi K, Hirao K, Yamamichi J. Anisotropic siloxane-based monolith prepared in confined spaces. J Chromatogr A 2006; 1119:88-94. [PMID: 16564532 DOI: 10.1016/j.chroma.2006.02.059] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 08/01/2005] [Revised: 02/13/2006] [Accepted: 02/21/2006] [Indexed: 11/30/2022]
Abstract
When bicontinuous gels are prepared via sol-gel method in a 2-dimensionally (2D) confined space, the gel skeletons in the vicinity of interface of a mold are elongated perpendicular to the interface. This phenomenon was attributed to the dynamic wetting of polymerizing siloxane phase onto the interface of the mold under gravity. In this paper, we report the successful preparation of monolithic columns with an oriented pillar structure in a variety of 2D confined spaces. Starting from a solution, which consists of methyltrimethoxysilane (MTMS), the macroporous structure is prepared in situ by a completely spontaneous process. In the oriented pillar structure, bicontinuous siloxane skeletons deformed or disappeared and most pillars are oriented along the direction of gravity. Gel morphologies with the pillar structure were examined by scanning electron microscopy (SEM) and laser scanning confocal microscopy (LSCM). Geometrical information on gel morphologies was numerically derived from the obtained 3D LSCM images.
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Affiliation(s)
- Yoshitaka Suzumura
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Japan
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Abstract
Near-IR excited Raman spectroscopy was applied to examine the structural change of hen egg-white lysozyme in tetragonal crystals at low temperatures. There was little difference found in the amide I and amide III regions between the spectra observed at 77 and 298 K, suggesting that the secondary structures of lysozyme were conserved in the temperature range from 77 to 298 K. Several bands arising from the protein side chains, particularly the methylene and phenylalanyl groups, showed significant changes in either intensity or bandwidth (or in both of them) on going from 77 to 298 K. Some of the spectral changes occurred gradually over the wide temperature range, and others occurred abruptly at around 200-240 K. The implications of these findings are discussed.
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Affiliation(s)
- M Nara
- Laboratory of Chemistry, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba 272-0827, Japan.
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