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Hirano M, Muto Y, Kuroda M, Fujiwara Y, Sasaki T, Kuroda K, Kamizaki R, Imajoh S, Tanabe Y, Al-Hammad WE, Nakamitsu Y, Shimizu Y, Sugimoto K, Oita M, Sugianto I, Bamgbose BO. Quantitative evaluation of the reduction of distortion and metallic artifacts in magnetic resonance images using the multiacquisition variable‑resonance image combination selective sequence. Exp Ther Med 2023; 25:109. [PMID: 36793326 PMCID: PMC9922940 DOI: 10.3892/etm.2023.11808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 01/04/2023] [Indexed: 01/26/2023] Open
Abstract
Magnetic resonance imaging (MRI) is superior to computed tomography (CT) in determining changes in tissue structure, such as those observed following inflammation and infection. However, when metal implants or other metal objects are present, MRI exhibits more distortion and artifacts compared with CT, which hinders the accurate measurement of the implants. A limited number of reports have examined whether the novel MRI sequence, multiacquisition variable-resonance image combination selective (MAVRIC SL), can accurately measure metal implants without distortion. Therefore, the present study aimed to demonstrate whether MAVRIC SL could accurately measure metal implants without distortion and whether the area around the metal implants could be well delineated without artifacts. An agar phantom containing a titanium alloy lumbar implant was used for the present study and was imaged using a 3.0 T MRI machine. A total of three imaging sequences, namely MAVRIC SL, CUBE and magnetic image compilation (MAGiC), were applied and the results were compared. Distortion was evaluated by measuring the screw diameter and distance between the screws multiple times in the phase and frequency directions by two different investigators. The artifact region around the implant was examined using a quantitative method following standardization of the phantom signal values. It was revealed that MAVRIC SL was a superior sequence compared with CUBE and MAGiC, as there was significantly less distortion, a lack of bias between the two different investigators and significantly reduced artifact regions. These results suggested the possibility of utilizing MAVRIC SL for follow-up to observe metal implant insertions.
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Affiliation(s)
- Masaki Hirano
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama 700-8558, Japan,Department of Radiology, Osaka Red Cross Hospital, Osaka 543-8555, Japan
| | - Yuki Muto
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama 700-8558, Japan,Department of Radiology, Oomoto Hospital, Okayama 700-0924, Japan
| | - Masahiro Kuroda
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama 700-8558, Japan,Correspondence to: Professor Masahiro Kuroda, Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - Yuta Fujiwara
- Division of Clinical Radiology Service, Okayama Central Hospital, Okayama 700-0017, Japan
| | - Tomoaki Sasaki
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama 700-8558, Japan,Department of Diagnostic Radiology, National Cancer Center Hospital East, Chiba 277-8577, Japan
| | - Kazuhiro Kuroda
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama 700-8558, Japan,Department of Health and Welfare Science, Graduate School of Health and Welfare Science, Okayama Prefectural University, Okayama 719-1197, Japan
| | - Ryo Kamizaki
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama 700-8558, Japan
| | - Satoshi Imajoh
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama 700-8558, Japan
| | - Yoshinori Tanabe
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama 700-8558, Japan
| | - Wlla E. Al-Hammad
- Department of Oral and Maxillofacial Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-0017, Japan
| | - Yuki Nakamitsu
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama 700-8558, Japan
| | - Yudai Shimizu
- Department of Oral and Maxillofacial Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-0017, Japan
| | - Kohei Sugimoto
- Graduate School of Interdisciplinary Sciences and Engineering in Health Systems, Okayama University, Okayama, 770-8558, Japan
| | - Masataka Oita
- Graduate School of Interdisciplinary Sciences and Engineering in Health Systems, Okayama University, Okayama, 770-8558, Japan
| | - Irfan Sugianto
- Department of Oral Radiology, Faculty of Dentistry, Hasanuddin University, Makassar, Sulawesi 90245, Indonesia
| | - Babatunde O. Bamgbose
- Department of Oral Diagnostic Sciences, Faculty of Dentistry, Bayero University, Kano 00234, Nigeria
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Gorodetski B, Heine O, Wolf M, Collettini F, Hamm B, Darmon-Kern E, Penzkofer T. Safety Analysis of Iobitridol as a Nonionic Contrast Medium: A Postmarketing Multicenter Surveillance Study With 94,960 Patients Almost 20 Years After Introduction. Invest Radiol 2020; 55:144-152. [PMID: 31977601 DOI: 10.1097/rli.0000000000000620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Our study sought to reevaluate the safety and diagnostic efficacy of iobitridol as a nonionic contrast medium after almost 20 years of use. MATERIALS AND METHODS This noninterventional postmarketing surveillance noncontrolled, multicenter (168 centers in Germany) study enrolled 94,960 patients receiving intravenous or intra-arterial iobitridol. The majority of the adjusted population (n = 92,550, 98.2%) underwent either computed tomography examination (n = 46,502, 49.3%) or intravenous urography (n = 46,048, 48.8%). A standardized questionnaire was used to ascertain patient's information, known risk factors, renal function status, premedication, type of examination, injection of contrast agent, imaging quality, diagnostic value, and safety. RESULTS A total of 469 patients (0.49%) experienced an adverse event (AE), and 24 patients (0.025%) reported a serious AE (SAE). All patients recovered and no fatal event occurred. The prevalence of AE was significantly higher in patients with at least one risk factor, with premedication, with a history of AE, in female and patients younger than 60 years old (P < 0.05). Presence of at least one risk factor is the only predictive factor for the prevalence of SAE (P = 0.042). In patients with a history of AE, premedication did not significantly lower the AE rate (P = 0.737). No statistically significant difference in the prevalence of AE between the different combination of cortisone and/or antihistamines as pretreatment was found. CONCLUSIONS Iobitridol is a safe contrast medium with a high tolerability and efficacy. Presence of risk factors such as cardiovascular diseases, allergies, or asthma was the only significant predictive factor for an AE and an SAE. Premedication did not significantly lower the occurrence of an AE and an SAE.
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Affiliation(s)
- Boris Gorodetski
- From the Department of Diagnostic and Interventional Radiology, Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin
| | | | - Michael Wolf
- Michael Wolf Information Systems, Püttlingen, Germany
| | - Federico Collettini
- From the Department of Diagnostic and Interventional Radiology, Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin
| | - Bernd Hamm
- From the Department of Diagnostic and Interventional Radiology, Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin
| | | | - Tobias Penzkofer
- From the Department of Diagnostic and Interventional Radiology, Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin
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Mandema L, Tak I, Mooij B, Groeneweg R, Bakker E, van Veldhoven P. Assessment of cam morphology of the hip with ultra sound imaging by physical therapists is reliable and valid. Phys Ther Sport 2018; 32:167-172. [PMID: 29793125 DOI: 10.1016/j.ptsp.2018.04.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 03/21/2018] [Accepted: 04/10/2018] [Indexed: 11/28/2022]
Abstract
BACKGROUND Femoroacetabular impingement syndrome is considered present when a combination of clinical symptoms, signs and morphological features of the hip co-exist. Imaging is increasingly popular in primary health care settings with physical therapists performing ultrasound (US). OBJECTIVE The aim of this study was to assess the diagnostic accuracy and inter-rater reliability of ultrasound in determining presence of cam morphology. DESIGN A concurrent validity and inter-rater reliability study. METHODS The presence of cam morphology of the hip was determined by α angle measures using Kinovea software. A cam was defined present when the α angle >60°. The index test was US and radiographs served as a gold standard. RESULTS Correlation between the radiographic α angle and ultrasound measures was r = 0.82 (p < 0.01). Inter-rater reliability was high with an ICC of 0.74 (95% CI 0.61-0.84). The predictive value for presence of cam morphology had a sensitivity of 79% and a specificity of 94%. The positive predictive value was 79% whereas the negative predictive value was 94%. Total accuracy was 90%. CONCLUSIONS Ultrasound conducted by trained physical therapists is a valid, reliable, specific and sensitive diagnostic tool to assess the presence of cam morphology.
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Huntley TA, Busmanis I, Desmond P, Wiesenfeld D. Mandibular invasion by squamous cell carcinoma: a computed tomographic and histological study. Br J Oral Maxillofac Surg 1996; 34:69-74. [PMID: 8645688 DOI: 10.1016/s0266-4356(96)90140-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Our knowledge of the entry and spread of oral cell carcinoma (SCC) into the mandible is increasing, making an impact on surgical planning. Fourteen resection specimens of mandibular bone and adjacent SCC were radiographically (CT) and histologically investigated. In six cases there was no involvement of mandibular bone; a continuous periosteal layer separated the tumour from bone. The remaining eight specimens showed bony involvement with good correlation between corresponding CT and histological slices in the five edentate cases. The site of entry of the tumour into the bone was usually through the alveolar crest with additional spread through the lingual cortex in tumours that lay lingual to the mandible. Although limited, our data shows that the main site of entry of SCC is through the alveolar crest. It also highlights the usefulness of CT in the identification of bone involvement in edentate cases. This information may assist in the planning of operations to preserve as much bone as is consistent with complete excision of the tumour.
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Affiliation(s)
- T A Huntley
- Royal Melbourne Hospital, Melbourne, Australia
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