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Image quality assessments in abdominal CT: Relative importance of dose, iterative reconstruction strength and slice thickness 腹部 CT 图像质量评估:剂量、迭代重建强度和切片厚度的相对重要性。
IF 2.5 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-10-01 DOI: 10.1016/j.radi.2024.09.060
B. Kataria , M. Woisetschläger , J. Nilsson Althén , M. Sandborg , Ö. Smedby

Introduction

Low contrast resolution in abdominal computed tomography (CT) may be negatively affected by attempts to lower patient doses. Iterative reconstruction (IR) algorithms play a key role in mitigating this problem. The reconstructed slice thickness also influences image quality. The aim was to assess the interaction and influence of patient dose, slice thickness, and IR strength on image quality in abdominal CT.

Method

With a simultaneous acquisition, images at 42 and 98 mAs were obtained in 25 patients. Multiplanar images with slice thicknesses of 1, 2, and 3 mm and advanced modeled iterative reconstruction (ADMIRE) strengths of 3 (AD3) and 5 (AD5) were reconstructed. Four radiologists evaluated the images in a pairwise manner based on five image criteria. Ordinal logistic regression with mixed effects was used to evaluate the effect of tube load, ADMIRE strength, and slice thickness using the visual grading regression technique.

Results

For all assessed image criteria, the regression analysis showed significantly (p < 0.001) higher image quality for AD5, but lower for tube load 42 mAs, and slice thicknesses of 1 mm and 2 mm, compared to the reference categories of AD3, 98 mAs, and 3 mm, respectively. AD5 at 2 mm was superior to AD3 at 3 mm for all image criteria studied. AD5 1 mm produced inferior image quality for liver parenchyma and overall image quality compared to AD3 3 mm. Interobserver agreement (ICC) ranged from 0.874 to 0.920.

Conclusion

ADMIRE 5 at 2 mm slice thickness may allow for further dose reductions due to its superiority when compared to ADMIRE 3 at 3 mm slice thickness.

Implications for practice

Combination of thinner slices and higher ADMIRE strength facilitates imaging at low dose.
简介:腹部计算机断层扫描(CT)的低对比分辨率可能会受到降低患者剂量的负面影响。迭代重建(IR)算法在缓解这一问题方面起着关键作用。重建切片厚度也会影响图像质量。目的是评估患者剂量、切片厚度和 IR 强度对腹部 CT 图像质量的相互作用和影响:方法:通过同步采集,在 42 和 98 mAs 下为 25 名患者获取图像。重建的多平面图像切片厚度为 1、2 和 3 毫米,高级建模迭代重建(ADMIRE)强度为 3(AD3)和 5(AD5)。四位放射科医生根据五项图像标准对图像进行了配对评估。利用视觉分级回归技术,使用混合效应的正序逻辑回归来评估导管负荷、ADMIRE强度和切片厚度的影响:结果:对于所有评估的图像标准,回归分析均显示出显著的影响(p 结论:ADMIRE 5 在 2 毫米的切片厚度上有显著的影响:与切片厚度为 3 毫米的 ADMIRE 3 相比,切片厚度为 2 毫米的 ADMIRE 5 具有优势,可进一步减少剂量:对实践的启示:薄切片与较高 ADMIRE 强度的结合有助于低剂量成像。
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引用次数: 0
Narrative review of tissue-mimicking materials for MRI phantoms: Composition, fabrication, and relaxation properties 核磁共振成像模型组织模拟材料综述:成分、制造和弛豫特性。
IF 2.5 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-10-01 DOI: 10.1016/j.radi.2024.09.063
H. Yusuff , S. Chatelin , J.-P. Dillenseger

Introduction

Tissue-mimicking materials (TMMs) are now essential reference objects for quality control, development and training in all medical imaging modalities. This review aims to provide a comprehensive synthesis of materials used in the fabrication of TMMs for MRI phantoms, focusing on their composition, fabrication methods, and relaxation properties (T1 and T2).

Methods

A systematic review was conducted, covering articles published between 1980 and 2023. Inclusion criteria encompassed studies involving physical MRI phantoms with measured T1 and T2 relaxation times. Exclusion criteria filtered out non-MRI studies, and digital/computational models.

Results

The review identifies and categorizes TMMs based on their primary gelling agents: agar, carrageenan, gelatin, polyvinyl alcohol (PVA), and other less common gels. Agar emerged as the most frequently used gelling agent due to its versatility and favorable MRI signal properties. Carrageenans, noted for their strength and minimal impact on T2 values, are often used in combination with agar. Gelatin, PVA, and other materials like Polyvinyl chloride (PVC) and PolyvinylPyrrolidone (PVP) also demonstrate unique advantages for specific applications. The review also highlights the challenges in phantom stability and the impact of various additives on the relaxation properties.

Conclusion

This synthesis provides a valuable guide for the fabrication of MRI phantoms tailored to desired T1 and T2 relaxation times, facilitating the development of more accurate and reliable imaging tools. Understanding the detailed properties of TMMs is fundamental to improve the quality control and educational applications of MRI technologies, especially with the advent of new magnetic field strengths and parametric imaging techniques.

Implication for practice

As experts in MRI systems, radiographers, educators, and researchers need to understand TMM compositions and methods of fabrications to develop MRI phantoms for educational tools and research purposes. This review serves as a valuable resource to guide them in these efforts.
介绍:组织模拟材料(TMM)是目前所有医学成像模式质量控制、开发和培训的重要参考对象。本综述旨在全面综述用于制造核磁共振成像模型 TMM 的材料,重点关注其成分、制造方法和弛豫特性(T1 和 T2):方法:我们对 1980 年至 2023 年间发表的文章进行了系统回顾。纳入标准包括涉及具有测量 T1 和 T2 松弛时间的物理磁共振成像模型的研究。排除标准过滤了非 MRI 研究和数字/计算模型:综述根据主要凝胶剂(琼脂、卡拉胶、明胶、聚乙烯醇(PVA)和其他不太常见的凝胶)对TMM进行了识别和分类。琼脂因其多功能性和良好的磁共振成像信号特性而成为最常用的胶凝剂。卡拉胶因其强度大、对 T2 值影响小而著称,经常与琼脂结合使用。明胶、PVA 和其他材料,如聚氯乙烯 (PVC) 和聚乙烯吡咯烷酮 (PVP),也在特定应用中显示出独特的优势。综述还强调了幻影稳定性方面的挑战以及各种添加剂对弛豫特性的影响:本综述为根据所需的 T1 和 T2 驰豫时间制造磁共振成像模型提供了宝贵的指导,有助于开发更精确、更可靠的成像工具。了解 TMM 的详细特性对于改进磁共振成像技术的质量控制和教育应用至关重要,尤其是随着新磁场强度和参数成像技术的出现:作为磁共振成像系统的专家,放射技师、教育工作者和研究人员需要了解 TMM 的成分和制造方法,以便开发用于教育工具和研究目的的磁共振成像模型。本综述是指导他们开展这些工作的宝贵资源。
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引用次数: 0
A Global Partnership - The design, implementation and evaluation of a Foundation in Oncology Module- Reducing the global health burden of cancer through human resource and capacity strengthening 全球伙伴关系--肿瘤学基础模块的设计、实施和评估--通过加强人力资源和能力减轻全球癌症的健康负担
IF 2.5 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-10-01 DOI: 10.1016/j.radi.2024.09.023
Alison Sanneh , Bahaty Riogi , Sheena Chauhan
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引用次数: 0
Putting the patient voice at the heart of information and education resources: The Respire+ website for radiotherapy following a breast cancer diagnosis. 让患者的声音成为信息和教育资源的核心:乳腺癌诊断后放射治疗的 Respire+ 网站。
IF 2.5 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-10-01 DOI: 10.1016/j.radi.2024.09.018
Heidi Probst , Helen Dring , Naman Julka-Anderson , Rachel Harris , Helen Simpson , Anna Southworth , Janet Ulman
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引用次数: 0
What is the Quality-of-Life impact of surrendering a driving license for patients following Stereotactic Radiosurgery /Radiotherapy for brain metastases at a single centre 在单一中心接受立体定向放射外科手术/放疗治疗脑转移瘤后,交出驾驶执照对患者的生活质量有何影响?
IF 2.5 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-10-01 DOI: 10.1016/j.radi.2024.09.019
Sheila Hassan , Catherine Holborn , Puteri Abdul Harris , Omar Al-Salihi , Lucy Brazil , Kazumi Chia
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引用次数: 0
Navigating the Journey: Insights into Why Individuals Pursue Therapeutic Radiography Courses in the UK and the Effectiveness of Recruitment Strategies. 领航之旅:洞察英国放射治疗课程的学习原因和招生策略的有效性。
IF 2.5 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-10-01 DOI: 10.1016/j.radi.2024.09.036
Jo McNamara , Jakub Thornley , Zoe Grant , Shannon Johnson
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引用次数: 0
Patients with prostate cancer experiencing sexual dysfunction: A comparison of Radiotherapy + Androgen Deprivation Therapy versus Radical Prostatectomy outcomes 性功能障碍的前列腺癌患者:放疗+雄激素剥夺疗法与根治性前列腺切除术疗效比较
IF 2.5 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-10-01 DOI: 10.1016/j.radi.2024.09.037
William Kinnaird , Patricia Schartau , Michael Kirby , Valerie Jenkins , Heather Payne
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引用次数: 0
FASTer Radiotherapy-The successes of a research led interventional clinic facilitating prostate radiotherapy trials FASTer 放射治疗--一家研究型介入诊所在促进前列腺放射治疗试验方面取得的成功
IF 2.5 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-10-01 DOI: 10.1016/j.radi.2024.09.009
Stacey Conway , Jane Cousins , Grace Totten , Gail Gilchrist , Fiona McCartan , Lynn Mccourt , Oonagh Stewart , Prof Suneil Jain , Dr Darren Mitchell , Dr Conor McGarry , Glen Whitten , Brachytherapy Radiographers , Denise Crone , Sarah Jane Flynn
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引用次数: 0
To pass or not to pass? Determining the acceptability of anteroposterior and lateral knee radiographs 通过还是不通过?确定膝关节前后位和侧位X光片的可接受性
IF 2.5 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-10-01 DOI: 10.1016/j.radi.2024.09.067
C.J.H. Gan , X. Zhuang , D.T.F.B. Mahmood , E.C.-P. Chua

Introduction

The criteria for determining the acceptability of total knee replacement (TKR) radiographs are not established in current clinical practice. In TKR patients, the implant components replaced the anatomical landmarks, making it more difficult for radiographers to determine the degree of rotation. This study aims to establish an acceptable range of knee rotation for TKR radiographs.

Methods

Rejected TKR radiographs (199 AP and 186 lateral) were analysed retrospectively. Radiographers objectively measured rotation on the radiographs. A subset of 46 AP and 46 lateral radiographs were rated by orthopaedic surgeons for rotation and diagnostic value. Inter-rater reliability (IRR) of radiographic measurements and surgeons' ratings were analysed using Bland–Altman and Cohen's kappa, respectively. Spearman's rank-order correlation and Receiver Operator Characteristic analyses were used to determine the correlation and diagnostic performance of the radiographic measurements against the surgeon's ratings.

Results

Strong IRR was observed for the radiographic measurements. Only slight to fair agreement was observed for the surgeons' rotation and diagnostic value ratings of the radiographs. Moderate to strong correlation was observed between the radiographic measurements and the surgeons’ ratings. The radiographic measurements provided acceptable to excellent discrimination of acceptable and unacceptable radiographs. The acceptable range of measured rotation for usability was AP: 0–5.29 mm and lateral: 0–6.01 mm.

Conclusion

The proposed measurement methods and the established rotation range could potentially be used by radiographers in clinical practice to determine the acceptability of TKR radiographs. Follow-up studies could investigate uncommon knee implants and seek consensus across different institutions on the acceptable degree of rotation.

Implications for practice

The proposed method suggests that accepting radiographs within the threshold (AP: 5.29 mm, lateral: 6.01 mm) reduces repeated examination and radiation exposure and improves imaging efficiency.
导言:在目前的临床实践中,确定全膝关节置换术(TKR)X 光片可接受性的标准尚未确立。在 TKR 患者中,植入部件取代了解剖标志,这使得放射技师更难确定旋转程度。本研究旨在为 TKR X 光片确定一个可接受的膝关节旋转范围。方法回顾性地分析了被拒绝的 TKR X 光片(199 张 AP 和 186 张 lateral)。放射技师对X光片上的旋转进行了客观测量。骨科医生对 46 张正侧位和 46 张侧位放射照片的旋转度和诊断价值进行评分。分别使用布兰德-阿尔特曼(Bland-Altman)和科恩卡帕(Cohen's kappa)分析了X光片测量和外科医生评分的同行间可靠性(IRR)。斯皮尔曼秩相关分析和受体运算特性分析用于确定放射线测量结果与外科医生评分之间的相关性和诊断性能。外科医生对射线照片的旋转和诊断价值评级仅有轻微到一般的一致性。放射线测量结果与外科医生的评分之间存在中度到高度的相关性。放射线测量结果可对可接受和不可接受的放射线照片进行可接受到极好的区分。可用性方面可接受的测量旋转范围为正侧:0-5.29 毫米,侧向:0-5.29 毫米:结论建议的测量方法和确定的旋转范围可用于放射技师在临床实践中确定 TKR 放射照片的可接受性。后续研究可以对不常见的膝关节植入物进行调查,并寻求不同机构对可接受的旋转度达成共识。对实践的意义所提出的方法表明,接受阈值(正侧:5.29 毫米,侧向:6.01 毫米)内的射线照片可以减少重复检查和辐射暴露,并提高成像效率。
{"title":"To pass or not to pass? Determining the acceptability of anteroposterior and lateral knee radiographs","authors":"C.J.H. Gan ,&nbsp;X. Zhuang ,&nbsp;D.T.F.B. Mahmood ,&nbsp;E.C.-P. Chua","doi":"10.1016/j.radi.2024.09.067","DOIUrl":"10.1016/j.radi.2024.09.067","url":null,"abstract":"<div><h3>Introduction</h3><div>The criteria for determining the acceptability of total knee replacement (TKR) radiographs are not established in current clinical practice. In TKR patients, the implant components replaced the anatomical landmarks, making it more difficult for radiographers to determine the degree of rotation. This study aims to establish an acceptable range of knee rotation for TKR radiographs.</div></div><div><h3>Methods</h3><div>Rejected TKR radiographs (199 AP and 186 lateral) were analysed retrospectively. Radiographers objectively measured rotation on the radiographs. A subset of 46 AP and 46 lateral radiographs were rated by orthopaedic surgeons for rotation and diagnostic value. Inter-rater reliability (IRR) of radiographic measurements and surgeons' ratings were analysed using Bland–Altman and Cohen's kappa, respectively. Spearman's rank-order correlation and Receiver Operator Characteristic analyses were used to determine the correlation and diagnostic performance of the radiographic measurements against the surgeon's ratings.</div></div><div><h3>Results</h3><div>Strong IRR was observed for the radiographic measurements. Only slight to fair agreement was observed for the surgeons' rotation and diagnostic value ratings of the radiographs. Moderate to strong correlation was observed between the radiographic measurements and the surgeons’ ratings. The radiographic measurements provided acceptable to excellent discrimination of acceptable and unacceptable radiographs. The acceptable range of measured rotation for usability was AP: 0–5.29 mm and lateral: 0–6.01 mm.</div></div><div><h3>Conclusion</h3><div>The proposed measurement methods and the established rotation range could potentially be used by radiographers in clinical practice to determine the acceptability of TKR radiographs. Follow-up studies could investigate uncommon knee implants and seek consensus across different institutions on the acceptable degree of rotation.</div></div><div><h3>Implications for practice</h3><div>The proposed method suggests that accepting radiographs within the threshold (AP: 5.29 mm, lateral: 6.01 mm) reduces repeated examination and radiation exposure and improves imaging efficiency.</div></div>","PeriodicalId":47416,"journal":{"name":"Radiography","volume":"30 6","pages":"Pages 1578-1587"},"PeriodicalIF":2.5,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Embedding the values of those with lived experience in the development of a national advanced practice curriculum 将亲身经历者的价值观纳入国家高级实践课程的开发中
IF 2.5 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING Pub Date : 2024-10-01 DOI: 10.1016/j.radi.2024.09.025
Melanie Clarkson , Ricardo Khine
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引用次数: 0
期刊
Radiography
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