Radiography最新文献_第9页

Reference levels in radiation doses and image quality metrics in chest−abdomen protocols in a neonatal unit 新生儿病房胸腹协议中辐射剂量和图像质量指标的参考水平

IF 2.8 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiography

Pub Date : 2025-12-10 DOI: 10.1016/j.radi.2025.103271

T. Mpikeleli , N. Phahlamohlaka , S. Acho

Introduction

The concept of diagnostic dose reference levels was introduced in diagnostic radiology as a tool to monitor patient dose. It is good practice to assess not only the consistency of the image quality of clinically acceptable X-ray images but also the radiation doses. This study evaluated the reference levels in radiation doses and image quality metrics in chest−abdomen imaging protocols in a neonatal intensive care unit.

Methods

X-ray images of the chest–abdomen were decomposed into five frequencies using the Laplacian pyramid. Image quality metrics were derived from the zero and third subbands in the lung–rib space and the mediastinum regions. Skin doses were estimated from the X-ray radiation output characteristic curves of the mobile X-ray units.

The local diagnostic reference levels for entrance skin dose and image quality metrics were estimated.

Results

For neonates weighing less than 1000 g, the proposed LDRL was 54.7 μGy, whereas for neonates with weights between 1000 and 1499 g, the LDRL was established as 50.1 μGy. Neonates weighing between 1500 and 2499 g and weighing greater than 2500 g had LDRLs of 50.9 μGy and 55.5 μGy, respectively. The reference levels for image quality metrics of the radiographs for the study population were established as 5.4, 3.4, 6.1, and 4.1 for lung noise, lung detail, mediastinum noise, and mediastinum detail, respectively.

Conclusion

Although radiation doses were comparable to those cited in literature, neonates with weights of 1000–1499 g and 1500–2499 g had skin doses lower than those of neonates with weights below 1000 g.

Implications for practice

Weight-based exposure parameters are recommended to ensure that neonatal skin doses are linearly proportional to weight, thereby maintaining adequate image quality across all weight groups and mobile units.

诊断剂量参考水平的概念被引入诊断放射学，作为监测患者剂量的工具。不仅评估临床可接受的x线图像的图像质量的一致性，而且评估辐射剂量是一种很好的做法。本研究评估了新生儿重症监护病房胸腹成像方案中辐射剂量和图像质量指标的参考水平。方法采用拉普拉斯金字塔法将胸腹x线图像分解为5个频率。从肺肋间隙和纵隔区域的第0和第3亚带得出图像质量指标。根据移动x射线装置的x射线辐射输出特性曲线估计皮肤剂量。估计了入口皮肤剂量和图像质量指标的局部诊断参考水平。结果体重小于1000 g的新生儿LDRL为54.7 μGy，体重1000 ~ 1499 g的新生儿LDRL为50.1 μGy。体重在1500 ~ 2499 g和体重大于2500 g的新生儿的最低推荐剂量分别为50.9 μGy和55.5 μGy。研究人群x线片图像质量指标的参考水平分别为肺噪声、肺细节、纵隔噪声和纵隔细节的5.4、3.4、6.1和4.1。结论虽然辐射剂量与文献引用相当，但体重在1000 ~ 1499 g和1500 ~ 2499 g的新生儿皮肤剂量低于体重在1000 g以下的新生儿。建议采用基于体重的暴露参数，以确保新生儿皮肤剂量与体重成线性比例，从而在所有体重组和移动单元中保持足够的图像质量。

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引用次数: 0

Understanding the facilitators and barriers to sonographers' research engagement: A systematic review 理解超声医师研究参与的促进因素和障碍：系统回顾

IF 2.8 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiography

Pub Date : 2025-12-10 DOI: 10.1016/j.radi.2025.103266

B. Ezenwuba , C.U. Ollawa , C. Hynes , A.U. Okoye , E. Iweka , O. Lawal

Introduction

Research engagement is central to evidence-based clinical ultrasound practice, and a component of advanced clinical practice pillars. Despite increasing policy emphasis and interventions, sonographers remain underrepresented in research activity. This systematic review aimed to identify the extent of sonographers’ research interest and engagement, and to explore facilitators and barriers influencing research participation and utilisation.

Methods

A mixed-methods systematic review was conducted following the PRISMA 2020 guidelines and the Cochrane Handbook. Systematic searches were carried out across four key databases, supplemented by manual searches of relevant journals, to identify quantitative, qualitative, and mixed-method studies exploring sonographers’ engagement in research. The Quality Assessment Tool for Studies with Diverse Designs (QATSDD) was used for critical appraisal. A results-based convergent synthesis was then performed to integrate the qualitative and quantitative findings.

Results

Seven studies (617 participants) met inclusion criteria. Sonographers demonstrate high awareness and interest in research (up to 68.5 %), but only one-third were active researchers. Key barriers included lack of protected research time, limited research skill/experience, insufficient organisational and professional support, restricted funding access, and a perceived lack of authority to implement findings. Facilitators included career development goals, scientific curiosity, research-oriented leadership, peer support, and access to mentorship or formal training.

Conclusion

Institutional and professional efforts are needed to promote sonographers’ research engagement. Enhanced mentorship/training, improved funding, embedding research into role specifications, and protected time are essential to bridge the interest–participation gap and build research capacity.

Implications for practice

Implementing targeted policy support and strategic initiatives—such as funding and training programmes for sonographer-focused research—can improve job satisfaction, increase engagement, and facilitate evidence-informed practice.

研究参与是循证临床超声实践的核心，也是高级临床实践支柱的组成部分。尽管越来越多的政策强调和干预，超声检查人员在研究活动中的代表性仍然不足。本系统综述旨在确定超声医师的研究兴趣和参与程度，并探讨影响研究参与和利用的促进因素和障碍。方法按照PRISMA 2020指南和Cochrane手册进行混合方法系统评价。在四个关键数据库中进行了系统检索，并辅以相关期刊的人工检索，以确定定量、定性和混合方法的研究，探讨超声医师参与研究的情况。采用不同设计研究质量评估工具（QATSDD）进行关键评价。然后进行基于结果的收敛综合，以整合定性和定量发现。结果7项研究（617名受试者）符合纳入标准。超声技师对研究表现出高度的意识和兴趣（高达68.5%），但只有三分之一是活跃的研究人员。主要障碍包括缺乏受保护的研究时间、有限的研究技能/经验、缺乏组织和专业支持、资金获取受限，以及被认为缺乏实施研究结果的权威。促进因素包括职业发展目标、科学好奇心、以研究为导向的领导、同伴支持以及获得指导或正式培训的机会。结论提高超声医师的科研参与度需要制度和专业的共同努力。加强指导/培训、改善资助、将研究纳入角色规范以及保护时间对于弥合兴趣参与差距和建设研究能力至关重要。实施有针对性的政策支持和战略举措，例如为以超声检查为重点的研究提供资金和培训计划，可以提高工作满意度，增加参与度，并促进循证实践。

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引用次数: 0

Advanced practitioners in interventional radiology: Are we worth it? 介入放射学的高级从业人员：我们值得吗？

IF 2.8 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiography

Pub Date : 2025-12-10 DOI: 10.1016/j.radi.2025.103253

E L Rose

引用次数: 0

Gonad contact shielding practices in digital radiography in emergency units in Kuwait: A cross-sectional survey 科威特急诊单位数字放射摄影中性腺接触屏蔽做法：横断面调查。

IF 2.8 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiography

Pub Date : 2025-12-08 DOI: 10.1016/j.radi.2025.103256

H. Busakher , M. Linehan

Introduction

Gonadal contact shielding (GCS) is contentious due to evolving guidelines such as the European consensus and other major international bodies, and technological advancements. This study assesses Kuwait's radiographers' practices, knowledge, and perceptions of GCS in emergency departments (ED) exploring how education, professional experience, and patient demographics influence adherence to GCS guidelines. The aim is to identify current perceptions, knowledge and practices of radiographers in Kuwait regarding GCS and its use in DR.

Methods

An online, cross-sectional survey of radiographers working in public hospitals ED in Kuwait was undertaken. Data was analysed using SPSS 26, descriptive statistics and inferential tests.

Results

A response rate of 72 % (n = 124/173) was achieved. 68.5 % (n = 85) of radiographers reported that they always used GCS, primarily to reduce radiation exposure to reproductive organs 79 % (n = 98), as well as stating they were following local protocols 78.2 %. Participants reported higher rates of GCS usage among male patients 73.39 % compared to female patients 68.55 % although, shielding was more commonly applied in younger patients, with a notable decline in usage for elderly patients.

Gender had slightly less influence than age, while education significantly impacted knowledge, with postgraduates showing greater awareness of GCS guidelines (p = 0.026). Male radiographers reported higher knowledge and more frequent GCS use than females (p = 0.030). No association was found between experience and adherence to GCS recommendations.

Conclusion

GCS remains widely used in Kuwait, practice varying with education, experience, and gender. However, current use diverges from European and international guidelines discouraging routine shielding, revealing evidence–practice gap.

Implications for practice

Current practice fails to align to international guidelines and requires national policy reform to ensure safe practice.

导读：性腺接触屏蔽（GCS）是有争议的，由于不断发展的指导方针，如欧洲共识和其他主要国际机构，以及技术的进步。本研究评估了科威特放射科医师在急诊科（ED）对GCS的实践、知识和认知，探讨了教育、专业经验和患者人口统计学如何影响GCS指南的遵守。目的是确定目前科威特放射技师对GCS及其在dr中的应用的看法、知识和做法。方法：对在科威特公立医院急诊科工作的放射技师进行了在线横断面调查。数据分析采用SPSS 26、描述性统计和推理检验。结果：有效率为72% （n = 124/173）。68.5% （n = 85）的放射技师报告他们一直使用GCS，主要是为了减少生殖器官的辐射暴露（79%）（n = 98），并表示他们遵循当地方案（78.2%）。参与者报告GCS在男性患者中的使用率为73.39%，而女性患者为68.55%，尽管屏蔽在年轻患者中更常用，而老年患者的使用率明显下降。性别的影响略低于年龄，而教育程度显著影响知识，研究生对GCS指南的认识更高（p = 0.026）。男性放射技师的GCS知识和使用频率均高于女性（p = 0.030）。没有发现经验与依从GCS建议之间的关联。结论：GCS在科威特仍然广泛使用，实践因教育、经验和性别而异。然而，目前的使用与不鼓励常规屏蔽的欧洲和国际指南不同，显示出证据与实践的差距。对实践的影响：目前的实践未能与国际准则保持一致，需要国家政策改革以确保安全实践。

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引用次数: 0

Mixed methodology: A pragmatic approach to investigating complexity in radiography research 混合方法学：研究放射学研究复杂性的实用方法。

IF 2.8 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiography

Pub Date : 2025-12-08 DOI: 10.1016/j.radi.2025.103257

J. Nightingale , A. Stewart-Lord

Objectives

Mixed methodology research designs are used to investigate and evaluate complexity in healthcare, yet the integration or mixing of qualitative and quantitative data in these studies is still considered a major methodological challenge. This article is the first to review the utilisation of mixed methods studies in radiography, with a particular emphasis on research design and evidence of integration. The paper presents a contemporary case study to explore advanced framework integration and concludes with recommendations for radiography mixed methods researchers.

Key findings

A search of three radiography journals (2013–2025) identified 26 mixed methods studies, mainly focusing on workforce research questions. At design level, only 14 studies were explicit about integration. Most studies were two-phase designs, with five studies deploying advanced frameworks. Convergent and explanatory sequential designs were prevalent, with data collection primarily through surveys, interviews and focus groups. Integration at the methods and reporting levels was rarely documented. The majority adopted a narrative integration reporting style, though few explicitly discussed qualitative and quantitative findings together. Only three articles explicitly defined meta-inferences, the new insights that emerge from the mixing of qualitative and quantitative data.

Conclusion

The adoption of mixed methodologies in radiography is limited but is increasingly used to investigate complex workforce research questions. While the individual quantitative and qualitative components are invariably well-described, a lack of meaningful integration potentially compromises the attainment of the true benefits of a mixed methods design.

Implications for practice

At the onset of the study, researchers are advised to justify the mixed methods design, clearly articulating the methods of integration at all study stages. Researchers should utilise appropriate tools that encourage reporting of quality criteria to ensure trustworthiness.

目的：混合方法学研究设计用于调查和评估医疗保健的复杂性，但这些研究中定性和定量数据的整合或混合仍然被认为是方法学上的主要挑战。本文首次回顾了混合方法在放射学研究中的应用，特别强调了研究设计和整合的证据。本文提出了一个当代案例研究，以探索先进的框架整合，并总结了对放射摄影混合方法研究人员的建议。主要发现：对三种放射学期刊（2013-2025）的搜索发现了26种混合方法研究，主要集中在劳动力研究问题上。在设计层面，只有14项研究明确了整合。大多数研究是两阶段设计，有五个研究部署了先进的框架。趋同和解释顺序设计是普遍的，数据收集主要通过调查，访谈和焦点小组。方法和报告级别的集成很少被记录。大多数人采用了叙述式的综合报告风格，尽管很少有人明确地将定性和定量研究结果放在一起讨论。只有三篇文章明确定义了元推论，即从定性和定量数据混合中产生的新见解。结论：在x线摄影中采用混合方法是有限的，但越来越多地用于调查复杂的劳动力研究问题。虽然单个的定量和定性组成部分总是被很好地描述，但缺乏有意义的整合可能会危及实现混合方法设计的真正好处。对实践的启示：在研究开始时，建议研究人员证明混合方法设计的合理性，清楚地阐明所有研究阶段的整合方法。研究人员应该利用适当的工具，鼓励报告质量标准，以确保可信度。

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引用次数: 0

Fracture detection with multi echo fast field echo (mFFE) MRI as a radiation-free alternative to CT 多回波快速场回波（mFFE） MRI作为CT的无辐射替代品进行骨折检测。

IF 2.8 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiography

Pub Date : 2025-12-07 DOI: 10.1016/j.radi.2025.103258

C. Künnapuu , M.G. Ebbesen , C. Lund , M. Roland Vils Pedersen

Introduction

Magnetic resonance imaging (MRI) has been suggested for radiation-free imaging of bone. The aim of this study is to develop and evaluate a new MRI bone sequence as an alternative to CT for imaging complex knee fractures in a clinical hospital setting.

Method

We present an optimized MRI sequence Fracture Detection with multi-echo fast field echo (mFFE) MRI that produces CT-like images for detecting cortical and trabecular bone fractures without ionizing radiation. Development included validation using a bone phantom and a clinical patient case of knee fracture.

Results

The mFFE sequence showed comparable fracture visualization to CT, with the added benefit of simultaneous soft tissue assessment. While MRI scan times are longer compared to CT, emerging Artificial Intelligence (AI) acceleration may enhance clinical applicability.

Conclusion

This method offers a promising radiation-free alternative for fracture imaging in musculoskeletal trauma for implementation for clinical practice.

Implications for practice

These findings offer valuable insights for standardisation on MRI bone imaging.

简介：磁共振成像（MRI）已被建议用于骨的无辐射成像。本研究的目的是开发和评估一种新的MRI骨序列，作为临床医院环境中复杂膝关节骨折CT成像的替代方法。方法：我们提出了一种优化的MRI序列骨折检测，采用多回波快速场回波（mFFE） MRI，产生类似ct的图像，用于检测皮质和小梁骨折，而不需要电离辐射。开发包括使用骨假体和膝关节骨折临床病例的验证。结果：mFFE序列显示了与CT相当的骨折可视化，同时还有软组织评估的好处。虽然与CT相比，MRI扫描时间更长，但新兴的人工智能（AI）加速可能会增强临床适用性。结论：该方法为临床应用于肌肉骨骼创伤的骨折成像提供了一种无辐射的方法。实践意义：这些发现为MRI骨成像的标准化提供了有价值的见解。

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引用次数: 0

IF 2.8 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiography

Pub Date : 2025-12-06 DOI: 10.1016/j.radi.2025.103267

A. Devnarain , A. Abdul-Rasheed

Introduction

Work-related neck pain (WRNP) is common among diagnostic radiographers due to physically demanding tasks. This study determined the prevalence, selected risk factors, and impact of WRNP on work performance in eThekwini, South Africa.

Methods

A descriptive, cross-sectional questionnaire was distributed to 144 diagnostic radiographers in public and private hospitals within eThekwini Municipality, South Africa. Quantitative data was imported to Microsoft Excel and IBM SPSS Statistics™ and analyzed using descriptive statistics. Descriptive analysis was used to describe the prevalence, selected risk factors and impact on work performance associated with work-related neck pain. Prevalence was reported as a percentage with 95 % confidence intervals.

Results

WRNP prevalence was 65.6 %. Key contributors included overtime work (50 %), wearing lead protective gear (75.4 %), and lifting/positioning patients or equipment (78.7 %). Nearly half (44.3 %) reported reduced work performance.

Conclusion

WRNP is prevalent among diagnostic radiographers, contributing to reduced work performance and absenteeism.

Implications for practice

Work-related neck pain in radiographers can reduce efficiency and compromise patient safety. Regular preventive ergonomic interventions, equipment and workplace redesign are essential to protect staff health and maintain service quality. Prioritizing these actions will strengthen workforce sustainability.

与工作相关的颈部疼痛（WRNP）在诊断放射技师中很常见，这是由于体力要求高的工作。本研究确定了南非德班尼的患病率、选定的风险因素以及WRNP对工作绩效的影响。方法对南非德班市公立和私立医院的144名放射诊断技师进行描述性横断面问卷调查。定量数据导入到Microsoft Excel和IBM SPSS Statistics™中，并使用描述性统计进行分析。描述性分析用于描述与工作相关的颈部疼痛的患病率、选定的风险因素以及对工作绩效的影响。患病率以百分比报告，置信区间为95%。结果wrnp患病率为65.6%。主要原因包括加班（50%）、佩戴铅防护装备（75.4%）和搬运/放置患者或设备（78.7%）。近一半（44.3%）的人表示工作表现有所下降。结论wrnp在放射诊断技师中普遍存在，导致工作绩效下降和缺勤。与工作相关的颈部疼痛可能会降低放射技师的工作效率并危及患者的安全。为了保护工作人员健康和保持服务质量，必须定期采取预防性人体工程学干预措施、重新设计设备和工作场所。优先考虑这些行动将加强劳动力的可持续性。

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引用次数: 0

Brain MR angiography using automatic clipping techniques: Evaluation of workflow improvement compared to manual clipping 使用自动剪辑技术的脑磁共振血管造影：与手工剪辑相比工作流程改进的评估

IF 2.8 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiography

Pub Date : 2025-12-04 DOI: 10.1016/j.radi.2025.103260

Y. Ito , Y. Sugino , T. Hibino , Y. Asada

Introduction

Manual clipping in brain MR angiography (MRA) is time-consuming and depends on operator experience. This study aimed to evaluate the effectiveness of an automatic clipping function (AutoClip) in improving workflow efficiency and maintaining image quality across different experience levels.

Methods

Thirty brain MRA datasets were processed by three technologists with 12, 5, and 1 years of MRI experience using both manual and automatic clipping. Processing time was measured, and image quality was visually assessed using a five-point scale for major intracranial arteries.

Results

AutoClip significantly reduced processing time for all operators, with the largest reduction observed in the least experienced operator. Visual assessment showed comparable image quality between manual and automatic methods, independent of experience level.

Conclusion

AutoClip may maintain diagnostic image quality while substantially reducing post-processing time, particularly benefiting less-experienced operators and potentially improving overall workflow efficiency.

Implications for practice

The AutoClip function could enhance workflow efficiency and standardize MRA post-processing across operators with varying experience levels.

在脑磁共振血管造影（MRA）中，手工剪影费时且依赖于操作者的经验。本研究旨在评估自动剪辑功能（AutoClip）在提高工作流程效率和保持不同经验水平的图像质量方面的有效性。方法分别由3名具有12年、5年和1年MRI工作经验的技术人员对30组脑磁共振成像数据进行手工和自动裁剪。测量处理时间，并使用颅内大动脉的五分制视觉评估图像质量。结果autoclip显著减少了所有操作人员的处理时间，其中经验最少的操作人员减少时间最多。视觉评估显示手动和自动方法之间的图像质量相当，独立于经验水平。结论：autoclip在保持诊断图像质量的同时，大大减少了后处理时间，尤其有利于经验不足的操作人员，并有可能提高整体工作效率。AutoClip功能可以提高工作流程效率，并使不同经验水平的操作人员的MRA后处理标准化。

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引用次数: 0

Stress management strategies among radiography students in the UAE: The influence of GPA and class level on coping approaches 阿联酋放射学学生的压力管理策略：GPA和班级水平对应对方法的影响

IF 2.8 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiography

Pub Date : 2025-12-04 DOI: 10.1016/j.radi.2025.103262

M.Z. El-Sayed , M. Rawashdeh , M.M. Abuzaid , W. Alomaim , S. Ali , M.A. Ali

Introduction

Radiography students experience high stress from academic and clinical demands; ineffective coping can lead to burnout and reduced academic performance. Few studies have examined the influence of Grade Point Average (GPA) and class level on coping strategies among radiography students. This study aims to investigate stress management strategies among radiography students and assess the impact of GPA and class level.

Methods

A cross-sectional survey was conducted among 608 radiography students in Egypt, the UAE, and Jordan between April and June 2024. The questionnaire included demographics, GPA, class level, and coping strategies. Data were analyzed using SPSS version 20.0. Chi-square and Fisher's exact tests were used to evaluate associations at p < 0.05.

Result

Most participants were female (70.4 %) and aged 18–22 years. Class level did not significantly affect coping strategies (χ² or FET as appropriate; p > 0.05). Common strategies included breaks (50.3 %) and weekly exercise (31.9 %). Overeating was reported by 47 %, decreasing from freshmen (56.1 %) to seniors (43.2 %). GPA showed significant associations. High GPA students more often took breaks (52.9 %, p = 0.010), engaged socially (39.4 %, p = 0.038), and were less likely to use drugs (p = 0.009), prescription medication (p = 0.022), or smoke (p = 0.001). Meditation was less frequent among high GPA students (30.8 %, p = 0.015).

Conclusion

Class level had little influence, while GPA strongly shaped coping. A high GPA was associated with adaptive behavior, whereas a low GPA was associated with substance use and maladaptive strategies.

Implications for practice

Institutions should promote adaptive coping, reduce harmful behavior, and tailor interventions to academic profiles to improve well-being and outcomes.

放射学专业的学生承受着来自学术和临床需求的巨大压力；无效的应对会导致倦怠和学业成绩下降。很少有研究考察平均绩点（GPA）和班级水平对放射学学生应对策略的影响。本研究旨在探讨放射学学生的压力管理策略，并评估GPA和班级水平的影响。方法于2024年4 - 6月对埃及、阿联酋和约旦的608名放射学学生进行横断面调查。问卷包括人口统计、GPA、班级水平和应对策略。数据分析采用SPSS 20.0版本。采用卡方检验和Fisher精确检验来评价相关性，p < 0.05。结果患者以女性居多（70.4%），年龄在18 ~ 22岁之间。班级水平对应对策略没有显著影响（χ2或FET视情况而定；p > 0.05）。常见的策略包括休息（50.3%）和每周锻炼（31.9%）。暴饮暴食者占47%，从新生（56.1%）下降到高年级（43.2%）。GPA表现出显著的相关性。GPA高的学生更经常休息（52.9%,p = 0.010），参加社交活动（39.4%,p = 0.038），并且较少使用药物（p = 0.009），处方药（p = 0.022）或吸烟（p = 0.001）。高GPA学生的冥想频率较低（30.8%,p = 0.015）。结论班级水平对学生应对的影响较小，而GPA对学生应对的影响较大。高GPA与适应性行为有关，而低GPA与物质使用和适应不良策略有关。对实践的启示机构应促进适应性应对，减少有害行为，并根据学术概况调整干预措施，以改善福祉和结果。

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引用次数: 0

Technical performance of dual-energy CT in the evaluation of hypovascular liver metastases: A systematic review and meta-analysis 双能CT在评估低血管性肝转移中的技术表现：一项系统回顾和荟萃分析

IF 2.8 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Radiography

Pub Date : 2025-12-04 DOI: 10.1016/j.radi.2025.103259

L. Asmundo , C.B. Monti , F. Rizzetto , S. Sforzin , S. Garziano , I. Vicentin , D. Albano , C. Sgrazzutti , A. Vanzulli

Introduction

This systematic review and meta-analysis evaluated the technical performance of dual-energy CT (DECT) in improving contrast resolution for hypovascular liver metastases.

Methods

A comprehensive literature search of MEDLINE and EMBASE was conducted from November 2024 to January 2025. Eligible studies assessed DECT for identifying hypovascular liver metastases and reported quantitative DECT metrics, including differences in Hounsfield units (ΔHU), contrast-to-noise ratio (CNR), or signal-to-noise ratio (SNR). A random-effects meta-analysis was performed to pool ΔHU, CNR, and SNR values derived from 40-keV virtual monoenergetic images and to compare them with reference single-energy CT (SECT) data.

Results

Out of 207 identified records, 12 studies met the inclusion criteria, encompassing a total of 698 patients. The pooled liver ΔHU in DECT was 164 ΔHU (95%CI 107–221 HU, p < 0.001, I² = 80 %), significantly higher than values found in literature for SECT. Pooled CNR was 5.53 (95 % CI 4.12–6.95, p < 0.001, I² = 72 %), comparable to that of SECT, while the pooled SNR was 9.71 (95 % CI 3.62–15.80, p = 0.002, I² = 72 %), slightly lower than SECT.

Conclusion

Compared with SECT, DECT has not demonstrated consistent technical superiority for imaging hypovascular liver metastases. Standardized acquisition protocols are needed to minimize heterogeneity and improve reproducibility.

Implications for practice

Although DECT provides advanced post-processing options and potential for contrast dose reduction, it may entail radiation doses comparable to or slightly higher than SECT depending on the scanner platform and acquisition protocol. Its use in routine assessment of hypovascular liver metastases remains limited, underscoring the need for standardized protocols, consistent reporting, and combined evaluation of both technical and diagnostic performance to define its clinical value.

本系统综述和荟萃分析评估了双能CT （DECT）在提高低血管性肝转移的对比分辨率方面的技术性能。方法于2024年11月~ 2025年1月在MEDLINE和EMBASE数据库中进行综合文献检索。符合条件的研究评估了DECT识别低血管性肝转移的效果，并报告了定量DECT指标，包括Hounsfield单位（ΔHU）、噪声对比比（CNR）或信噪比（SNR）的差异。随机效应荟萃分析汇集了40 kev虚拟单能图像的ΔHU、CNR和SNR值，并将其与参考单能CT （SECT）数据进行比较。结果在207份确定的记录中，有12项研究符合纳入标准，共包括698名患者。需要标准化的采集协议来减少异质性和提高可重复性。尽管DECT提供了先进的后处理选项和降低对比剂量的潜力，但根据扫描仪平台和采集方案，它可能需要与SECT相当或略高于SECT的辐射剂量。它在低血管性肝转移的常规评估中的应用仍然有限，强调需要标准化的方案，一致的报告，以及技术和诊断性能的综合评估，以确定其临床价值。

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引用次数: 0