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Fukuda T, Yonenaga T, Akao R, Hashimoto T, Maeda K, Shoji T, Shioda S, Ishizaka Y, Ojiri H. Comparison of Bone Evaluation and Metal Artifact between Photon-Counting CT and Five Energy-Integrating-Detector CT under Standardized Conditions Using Cadaveric Forearms. Diagnostics (Basel) 2024; 14:350. [PMID: 38396389 PMCID: PMC10888094 DOI: 10.3390/diagnostics14040350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/30/2024] [Accepted: 02/03/2024] [Indexed: 02/25/2024] Open
Abstract
BACKGROUND To compare the potential of various bone evaluations by considering photon-counting CT (PCCT) and multiple energy-integrating-detector CT (EIDCT), including three dual-energy CT (DECT) scanners with standardized various parameters in both standard resolution (STD) and ultra-high-resolution (UHR) modes. METHODS Four cadaveric forearms were scanned using PCCT and five EIDCTs, by applying STD and UHR modes. Visibility of bone architecture, image quality, and a non-displaced fracture were subjectively scored against a reference EIDCT image by using a five-point scale. Image noise, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were also compared. To assess metal artifacts, a forearm with radial plate fixation was scanned by with and without Tin filter (Sn+ and Sn-), and virtual monoenergetic image (VMI) at 120 keV was created. Regarding Sn+ and VMI, images were only obtained from the technically available scanners. Subjective scores and the areas of streak artifacts were compared. RESULTS PCCT demonstrated significantly lower noise (p < 0.001) and higher bone SNR and CNR (p < 0.001) than all EIDCTs in both resolution modes. However, there was no significant difference between PCCT and EIDCTs in almost all subjective scores, regardless of scan modes, except for image quality where a significant difference was observed, compared to several EIDCTs. Metal artifact analysis revealed PCCT had larger artifact in Sn- and Sn+ (p < 0.001), but fewer in VMIs than three DECTs (p < 0.001 or 0.001). CONCLUSIONS Under standardized conditions, while PCCT had almost no subjective superiority in visualizing bone structures and fracture line when compared to EIDCTs, it outperformed in quantitative analysis related to image quality, especially in lower noise and higher tissue contrast. When using PCCT to assess cases with metal implants, it may be recommended to use VMIs to minimize the possible tendency for artifact to be pronounced.
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Affiliation(s)
- Takeshi Fukuda
- Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Takenori Yonenaga
- Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Ryo Akao
- Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Tohru Hashimoto
- Department of Anatomy, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Kazuhiro Maeda
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Tomokazu Shoji
- Department of Radiology, Tha Jikei University Katsushika Medical Center, 6-41-2 Aoto, Katsushika-ku, Tokyo 125-8506, Japan
| | - Shoichi Shioda
- Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Yu Ishizaka
- Medicalscanning Tokyo, 3-1-17 Nihonbashi, Chuo-ku, Tokyo 103-0027, Japan
| | - Hiroya Ojiri
- Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan
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Fukuda T, Yonenaga T, Miyasaka T, Kimura T, Jinzaki M, Ojiri H. CT in osteoarthritis: its clinical role and recent advances. Skeletal Radiol 2023; 52:2199-2210. [PMID: 36287235 DOI: 10.1007/s00256-022-04217-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/16/2022] [Accepted: 10/18/2022] [Indexed: 02/02/2023]
Abstract
Computed tomography (CT) is a widely available imaging method and considered as one of the most reliable techniques in bone assessment. Although CT has limited tissue contrast and needs radiation exposure, it has several advantages like fast scanning time and high spatial resolution. In this regard, CT has unique roles in osteoarthritis (OA) and its variable utilities have been reported. Hence, this review highlights the clinical role of CT in OA of representative joints. In addition, CT showed the several technical advancements recently, for example, acquiring the CT image with standing, obtaining the dual-energy data, and novel photon-counting detector development. Therefore, the recent studies and potential utility of these new CT systems in OA are also discussed.
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Affiliation(s)
- Takeshi Fukuda
- Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, Japan.
| | - Takenori Yonenaga
- Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, Japan
| | - Teruyuki Miyasaka
- Department of Orthopedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, Japan
| | - Tadashi Kimura
- Department of Orthopedic Surgery, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, Japan
| | - Masahiro Jinzaki
- Department of Radiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-Ku, Tokyo, Japan
| | - Hiroya Ojiri
- Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, Japan
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Fukuda T, Kayama R, Ogiwara S, Yonenaga T, Ojiri H. Comparison of the axillary lymph node between rheumatoid arthritis and psoriatic arthritis with computed tomography. Acta Radiol Open 2022; 11:20584601221112616. [PMID: 35846390 PMCID: PMC9284224 DOI: 10.1177/20584601221112616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 06/22/2022] [Indexed: 11/17/2022] Open
Abstract
Backgrounds There is a lack of universally available biomarker to differentiate rheumatoid arthritis (RA) and psoriatic arthritis (PsA). Purpose to see if the size of the axillary lymphnodes (ALNs) and the frequency of lymphadenopathy are useful biomarker to differentiate RA and PsA. Material and Methods Forty RA and 19 PsA patients without previous biologics usage were retrospectively included. Chest CT was assessed for the presence of lymphadenopathy and the size of the largest ALN. Frequency of lymphadenopathies was statistically compared between RA and PsA. The short axis and the long axis of the largest ALN were also compared and receiver operating characteristic (ROC) curve analysis was performed. Results Frequency of axillary lymphadenopathy was significantly higher in RA than in PsA (80% vs 31.6%, p < .001). Number of lymphadenopathies in each patient was also significantly higher in RA than in PsA (3.0 vs 1.2 per patient, p = .005). Sensitivity and specificity for differentiating RA from PsA by the presence of at least one axillary lymphadenopathy were 0.8 and 0.68, respectively. The short axis of the largest ALNs in RA was significantly longer than in PsA (6.5 ± 1.6 mm vs 4.7 ± 1.7 mm, p < .001). ROC curve analysis of the short axis showed AUC of 0.75 ( p = .002) and the cutoff value of 5.1 mm with a sensitivity of 0.83 and specificity of 0.74, when differentiating RA and PsA. Conclusion Presence of ALN lymphadenopathy and the short axis of the largest ALN may have a potential utility in differentiating RA and PsA.
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Affiliation(s)
- Takeshi Fukuda
- Department of Radiology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Reina Kayama
- Department of Radiology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Sho Ogiwara
- Department of Radiology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Department of Radiology, Kawaguchi Municipal Medical Center, Kawaguchi-shi, Saitama, Japan
| | - Takenori Yonenaga
- Department of Radiology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Hiroya Ojiri
- Department of Radiology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
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Fukuda T, Umezawa Y, Tojo S, Yonenaga T, Asahina A, Nakagawa H, Fukuda K. Initial Experience of Using Dual-Energy CT with an Iodine Overlay Image for Hand Psoriatic Arthritis: Comparison Study with Contrast-enhanced MR Imaging. Radiology 2017; 284:134-142. [PMID: 28045646 DOI: 10.1148/radiol.2016161671] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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
Purpose To determine the feasibility of dual-energy (DE) computed tomography (CT) with an iodine overlay image (IOI) for evaluation of psoriatic arthritis in the hand. Materials and Methods Approval from the institutional ethics committee and written informed consent from all patients were obtained. This prospective study included 16 patients who had psoriasis with finger joint symptoms from January 2015 to January 2016. Contrast material-enhanced (CE) DE CT and 1.5-T CE magnetic resonance (MR) imaging were performed within 1 month of each other. DE CT was performed with a tube voltage of 80 kV and 140 kV with use of a 0.4-mm tin filter. Images acquired with both modalities were evaluated by two radiologists independently by using a semiquantitative scoring system. Interreader agreement was calculated for each modality: Weighted κ values were calculated for synovitis, flexor tenosynovitis, and extensor peritendonitis, and κ values were calculated for periarticular inflammation. With consensus scores and CE MR images as the reference, the sensitivity and specificity of IOI DE CT for inflammatory lesions were calculated. Statistical analysis of discordant readings was performed by using the McNemar test. Results Interreader agreement for inflammatory lesions was excellent or good (weighted κ = 0.83 and κ = 0.75 in IOI DE CT; weighted κ = 0.81 and κ = 0.87 in CE MR imaging). The sensitivity and specificity of IOI DE CT were 0.78 and 0.87, respectively. Total agreement was 86.3%; however, there were significantly more lesions detected with IOI DE CT than with CE MR imaging alone (134 vs 20 lesions in 1120 evaluated items; P < .001). Sixty-nine percent of the abnormalities detected with IOI DE CT alone were located in distal interphalangeal joints. Conclusion IOI DE CT is a new imaging modality that may be useful for evaluating psoriatic arthritis in the hand, particularly in the detection of inflammatory lesions in small joints, and may be more useful than CE MR imaging, within the limitation that there is no histopathologic reference. © RSNA, 2017.
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Affiliation(s)
- Takeshi Fukuda
- From the Departments of Radiology (T.F., S.T., T.Y., K.F.) and Dermatology (Y.U., A.A., H.N.), The Jikei University School of Medicine, 3-19-18 Nishi-shimbashi, Minato-ku, Tokyo 1058471, Japan
| | - Yoshinori Umezawa
- From the Departments of Radiology (T.F., S.T., T.Y., K.F.) and Dermatology (Y.U., A.A., H.N.), The Jikei University School of Medicine, 3-19-18 Nishi-shimbashi, Minato-ku, Tokyo 1058471, Japan
| | - Shinjiro Tojo
- From the Departments of Radiology (T.F., S.T., T.Y., K.F.) and Dermatology (Y.U., A.A., H.N.), The Jikei University School of Medicine, 3-19-18 Nishi-shimbashi, Minato-ku, Tokyo 1058471, Japan
| | - Takenori Yonenaga
- From the Departments of Radiology (T.F., S.T., T.Y., K.F.) and Dermatology (Y.U., A.A., H.N.), The Jikei University School of Medicine, 3-19-18 Nishi-shimbashi, Minato-ku, Tokyo 1058471, Japan
| | - Akihiko Asahina
- From the Departments of Radiology (T.F., S.T., T.Y., K.F.) and Dermatology (Y.U., A.A., H.N.), The Jikei University School of Medicine, 3-19-18 Nishi-shimbashi, Minato-ku, Tokyo 1058471, Japan
| | - Hidemi Nakagawa
- From the Departments of Radiology (T.F., S.T., T.Y., K.F.) and Dermatology (Y.U., A.A., H.N.), The Jikei University School of Medicine, 3-19-18 Nishi-shimbashi, Minato-ku, Tokyo 1058471, Japan
| | - Kunihiko Fukuda
- From the Departments of Radiology (T.F., S.T., T.Y., K.F.) and Dermatology (Y.U., A.A., H.N.), The Jikei University School of Medicine, 3-19-18 Nishi-shimbashi, Minato-ku, Tokyo 1058471, Japan
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Tan A, Baboolal T, Benjamin M, Yonenaga T, Binks D, McGonagle D. SAT0435 Tibial Spine Morphology and Association with Anterior Cruciate Ligament Degeneration – A Combined MRI, X-rays and Histology Study of Early Knee Osteoarthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.5728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Fukuda T, Umezawa Y, Tojo S, Yonenaga T, Asahina A, Nakagawa H, Fukuda K. OP0126 Dual Energy CT with Iodine Map Is Promising New Imaging Modality in The Evaluation of Hand Psoriatic Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Yanaba K, Sadaoka A, Yonenaga T, Saeki H, Umezawa Y, Tojo S, Ito T, Kikuchi S, Fukuda K, Nakagawa H. Adalimumab markedly improves enthesitis in patients with psoriatic arthritis: Evaluation with a magnetic resonance imaging scoring system. J Dermatol 2015; 42:1153-9. [DOI: 10.1111/1346-8138.13014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 05/25/2015] [Indexed: 11/30/2022]
Affiliation(s)
- Koichi Yanaba
- Department of Dermatology; The Jikei University School of Medicine; Tokyo Japan
| | - Akari Sadaoka
- Department of Radiology; The Jikei University School of Medicine; Tokyo Japan
| | - Takenori Yonenaga
- Department of Radiology; The Jikei University School of Medicine; Tokyo Japan
| | - Hidehisa Saeki
- Department of Dermatology; Nippon Medical School; Tokyo Japan
| | - Yoshinori Umezawa
- Department of Dermatology; The Jikei University School of Medicine; Tokyo Japan
| | - Shinjiro Tojo
- Department of Radiology; The Jikei University School of Medicine; Tokyo Japan
| | - Toshihiro Ito
- Department of Dermatology; The Jikei University School of Medicine; Tokyo Japan
| | - Sota Kikuchi
- Department of Dermatology; The Jikei University School of Medicine; Tokyo Japan
| | - Kunihiko Fukuda
- Department of Radiology; The Jikei University School of Medicine; Tokyo Japan
| | - Hidemi Nakagawa
- Department of Dermatology; The Jikei University School of Medicine; Tokyo Japan
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Yonenaga T, Saeki H, Nakagawa H, Fukuchi O, Umezawa Y, Hayashi M, Ito T, Yanaba K, Tojyo S, Fukuda K. Four cases of Japanese patients with psoriatic arthritis in whom effective treatments by anti-tumor necrosis factor-α drugs were evaluated by magnetic resonance imaging together with improvement of skin lesions. J Dermatol 2014; 42:49-55. [DOI: 10.1111/1346-8138.12708] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 10/08/2014] [Indexed: 11/30/2022]
Affiliation(s)
- Takenori Yonenaga
- Department of Radiology; The Jikei University School of Medicine; Tokyo Japan
| | - Hidehisa Saeki
- Department of Dermatology; Nippon Medical School; Tokyo Japan
| | - Hidemi Nakagawa
- Department of Dermatology; The Jikei University School of Medicine; Tokyo Japan
| | - Osamu Fukuchi
- Department of Dermatology; The Jikei University School of Medicine; Tokyo Japan
| | - Yoshinori Umezawa
- Department of Dermatology; The Jikei University School of Medicine; Tokyo Japan
| | - Mitsuha Hayashi
- Department of Dermatology; The Jikei University School of Medicine; Tokyo Japan
| | - Toshihiro Ito
- Department of Dermatology; The Jikei University School of Medicine; Tokyo Japan
| | - Koichi Yanaba
- Department of Dermatology; The Jikei University School of Medicine; Tokyo Japan
| | - Shinjiro Tojyo
- Department of Radiology; The Jikei University School of Medicine; Tokyo Japan
| | - Kunihiko Fukuda
- Department of Radiology; The Jikei University School of Medicine; Tokyo Japan
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Binks D, Bergin D, Freemont A, Hodgson R, Yonenaga T, McGonagle D, Radjenovic A. Potential role of the posterior cruciate ligament synovio-entheseal complex in joint effusion in early osteoarthritis: a magnetic resonance imaging and histological evaluation of cadaveric tissue and data from the Osteoarthritis Initiative. Osteoarthritis Cartilage 2014; 22:1310-7. [PMID: 25008208 PMCID: PMC4164908 DOI: 10.1016/j.joca.2014.06.037] [Citation(s) in RCA: 5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 05/30/2014] [Accepted: 06/30/2014] [Indexed: 02/02/2023]
Abstract
OBJECTIVE This study explored posterior cruciate ligament (PCL) synovio-entheseal complex (SEC) microanatomy to determine whether it may participate in the early osteoarthritis (OA) disease process. METHODS SEC microanatomy and OA features were evaluated in 14 non-arthritic cadaveric knees (mean age = 69.9) using magnetic resonance imaging (MRI) and histology. MRI images of 49 subjects selected from the progression cohort of the Osteoarthritis Initiative (OAI) were evaluated by a musculoskeletal radiologist using an original semi-quantitative method for features associated with OA at the PCL tibial enthesis. Statistical analysis was performed using chi-square and Wilcoxon signed-rank tests to evaluate associations between SEC configuration and OA features. RESULTS The PCL formed a SEC-like structure encompassing bone- and ligament-lining intra-articular cartilages to which the posterior root of the medial meniscus contributed. Degenerative features at the PCL-SEC included: neovascularisation (44%), enthesis chondrocyte clustering (44%), collagen matrix fissuring at the enthesis (56%) and in the PCL itself (67%), tidemark duplication (44%), bone remodelling (44%) and microscopic inflammatory changes (33%). In the OAI cohort, SEC-related pathology included bone marrow lesions (BMLs) (69%) and osteophytosis (94%) at locations that corresponded to SEC-related cartilages. Posterior joint recess effusion (49%) was linked to MRI abnormalities at PCL-SEC cartilages (χ2 = 7.27, P = 0.007). CONCLUSIONS The PCL has a prominent SEC configuration that is associated with microscopic OA changes in aged clinically non-diseased joints. MRI determined knee OA commonly exhibited pathological features at this site which was associated with adjacent joint effusion. Thus, the PCL-SEC could play a hitherto unappreciated role in the early OA disease process.
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Affiliation(s)
- D.A. Binks
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, UK,Leeds NIHR Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - D. Bergin
- Department of Radiology, Galway University Hospitals, Galway, Ireland
| | - A.J. Freemont
- School of Medicine, University of Manchester, Manchester, UK
| | - R.J. Hodgson
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, UK,Leeds NIHR Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - T. Yonenaga
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, UK,Leeds NIHR Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - D. McGonagle
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, UK,Leeds NIHR Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust, Leeds, UK,Address correspondence and reprint requests to: D. McGonagle, Leeds Institute of Rheumatic and Musculoskeletal Medicine, Chapel Allerton Hospital, Leeds LS7 4SA, UK. Tel: 44-(0)113-392-4883; Fax: 44-(0)113-392-4491.
| | - A. Radjenovic
- Institute of Cardiovascular & Medical Sciences, University of Glasgow, Glasgow, UK
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Silva Jr. JR, Hayashi D, Yonenaga T, Fukuda K, Genant HK, Lin C, Rahmouni A, Guermazi A. MRI of bone marrow abnormalities in hematological malignancies. Diagn Interv Radiol 2013; 19:393-9. [DOI: 10.5152/dir.2013.067] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Hayashi D, Yonenaga T, Soshi S, Fukuda K. Progressively worsening paraesthesia of the left leg, gait disturbances and constipation in a 63-year-old man. Skeletal Radiol 2009; 38:1209-11; 1189-90. [PMID: 19662402 DOI: 10.1007/s00256-009-0754-2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Daichi Hayashi
- Department of Radiology, Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo 105-8461, Japan.
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Abe K, Hirakawa K, Yonenaga T, Kobayashi S, Nishimura M, Ayabe Z. Assessment of left ventricular ejection fraction measured by quantitative gated SPECT: correlation with left ventriculography and first-pass radionuclide angiography. Int J Cardiovasc Imaging 2005; 22:223-30. [PMID: 16231080 DOI: 10.1007/s10554-005-9014-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2004] [Accepted: 06/17/2005] [Indexed: 10/25/2022]
Abstract
PURPOSE The purpose of this study was to evaluate the reliability of left ventricular ejection fraction (LVEF) measured by quantitative gated SPECT (QGS). We compared the efficacy of LVEF assessment among Tc-99m tetrofosmin gated SPECT imaging, contrast left ventriculography (LVG), and first-pass radionuclide angiography (FP). PATIENTS One-hundred and seven patients with ischemic heart disease underwent QGS and LVG simultaneously within 3 months, and 92 of the 107 patients also underwent FP at the same time. RESULTS QGS progressively overestimated LVEF at the lower range of end-systolic volume (ESV), especially in patients with small hearts. Moreover, the QGS technique systemically tended to underestimate LVEF in comparison with LVG. However, linear regression analysis demonstrated a good correlation between the LVEF values measured by QGS and those measured by both LVG (p<0.0001) and FP (p<0.0001). CONCLUSION Although QGS has a tendency to overestimate LVEF in patients with small hearts, and to systemically underestimate LVEF compared with LVG, this technique is still a reliable clinical tool for measurement of LVEF.
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Affiliation(s)
- Koichiro Abe
- Department of Radiology, Ageo Central General Hospital, Japan.
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Shimahara M, Ono K, Terai A, Konda T, Toyoshima A, Yonenaga T. An experimental study on the healing of fracture of the condylar process of the mandible--the course after malunion. Bull Osaka Med Sch 1987; 33:164-78. [PMID: 3508731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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