European Journal of Radiography最新文献

英文中文

Evaluation of the pectoral muscle in mammography images: The Australian experience 胸部肌肉在乳房x线摄影图像中的评价:澳大利亚的经验

European Journal of Radiography

Pub Date : 2009-03-01 DOI: 10.1016/j.ejradi.2008.11.003

Kelly Spuur, Ann Poulos

Introduction

Critical to the success of early breast cancer detection is the consistent production of high quality mammographic images. Image evaluation systems are used to evaluate mammographic image quality and must be reliable and valid. This study set out to investigate radiographers' perceptions of the current image evaluation systems such as the PGMI as well as their interpretation of criteria relating to the presentation of the pectoral muscle in the mediolateral oblique view.

Method

A survey method was employed for this exploratory study as a way of collecting data from the largest possible sample. Surveys were distributed to radiographers employed in all different types of work in mammography. Following collation of responses descriptive statistics were developed. Thematic analysis was applied to the responses to the open-ended questions.

Results

One hundred and sixty eight surveys were returned. The questionnaire responses were grouped into two categories: image evaluation systems and the presentation of the pectoral muscle. Overall the study results demonstrate variations in Australian radiographers' practice when evaluating mammogram images.

Conclusion

The study demonstrated worrying variations in the interpretation of criteria in current image evaluation systems. Inconsistent interpretation of criteria relating to the presentation of the pectoral muscle increases the risk of breast tissue not being included in the image. This study has provided evidence for the need for clearly defined criteria using objective measures so that the subjectivity of interpretation is minimised.

早期乳腺癌检测成功的关键是始终如一地产生高质量的乳房x线摄影图像。图像评估系统用于评估乳房x线摄影图像质量，必须可靠有效。本研究旨在调查放射技师对当前图像评估系统(如PGMI)的看法，以及他们对中外侧斜位胸肌表现标准的解释。方法本探索性研究采用问卷调查法，尽可能从最大的样本中收集数据。调查是向从事乳房x光造影不同工作类别的放射技师分发的。在对回答进行整理后，开发了描述性统计。对开放式问题的答复进行了专题分析。结果共回收问卷168份。问卷的回答分为两类:图像评价系统和胸肌的表现。总的来说，研究结果表明，在评估乳房x线照片时，澳大利亚放射技师的做法存在差异。结论本研究显示了当前图像评价系统中标准解释的令人担忧的变化。对胸肌表现标准的不一致解释增加了乳房组织未包括在图像中的风险。这项研究提供了证据，证明需要使用客观措施明确定义标准，以便最大限度地减少解释的主观性。

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引用次数: 12

Doses and image quality for chest radiographs in three Nigerian hospitals 尼日利亚三家医院胸部x光片的剂量和图像质量

European Journal of Radiography

Pub Date : 2009-03-01 DOI: 10.1016/j.ejradi.2008.09.001

N.O. Egbe , S.O. Inyang , D.U. Eduwem , I. Ama

To encourage local participation in patient dose data acquisition, a mathematical method of entrance skin doses determination, developed by Harpen, has been used to determine patient doses and radiographic/technical image quality for 169 adult patients undergoing non-grid chest radiography in three Nigerian hospitals. Calculated doses were found to be about 12.5% (range 8.9–13.3%) higher than doses obtained with thermoluminescence dosemeters (TLD). This level of discrepancy was about 4% higher than the value reported in the literature. Radiographic/technical quality was rated at 53.7% while image quality obtained against a standard image according to the European guidelines was rated with an above average score (58%). Notable variation between the hospitals was observed and the need for optimization highlighted in technical areas like collimation, film processing and in patient dose reduction using better exposure techniques. This study presents patient entrance doses and image quality in hospitals where such data was not existing and could therefore be used as a basis for future studies in dose and image quality, towards the development of local and national reference parameters. The mathematical method, though highly susceptible to errors, can be employed until dose monitoring equipment become more accessible.

为鼓励当地参与患者剂量数据采集工作，已使用Harpen开发的入口皮肤剂量测定数学方法，对尼日利亚三家医院接受无网格胸部x线摄影的169名成年患者确定患者剂量和放射摄影/技术图像质量。计算出的剂量比用热释光剂量计(TLD)获得的剂量高约12.5%(范围8.9-13.3%)。这一差异水平比文献报道的值高出约4%。放射照相/技术质量评分为53.7%，而根据欧洲指南获得的标准图像的图像质量评分高于平均分(58%)。观察到各医院之间存在显著差异，在准直、胶片处理和使用更好的照射技术减少病人剂量等技术领域强调需要进行优化。本研究介绍了没有此类数据的医院的病人入院剂量和图像质量，因此可以用作未来剂量和图像质量研究的基础，以制定地方和国家参考参数。数学方法虽然很容易出错，但在剂量监测设备变得更容易获得之前可以采用。

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引用次数: 11

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