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EVALUATION OF IMAGE PROCESSING TECHNIQUES OF PHOTON-COUNTING X-RAY RADIOGRAPHY IN THORACIC DIAGNOSTIC IMAGING

胸部诊断成像中光子计数X射线摄影图像处理技术的评价

基本信息

批准号：
09670933
负责人：
ITOUJI Eiichiro
金额：
$ 0.7万
依托单位：
KOBE UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09670933/
关键词：
Chest Radiography Digital Radiography Photon Counting X-ray Radiography Image Processing Chest Disease

项目摘要

[INTRODUCTION] Photon counting X-ray radiography (quantum radiography : QR) offers digital images produced by directly measuring the number of photons of an X-ray which have permeated through the object. The photons are calculated by means of CdTe multi-line sensor. It gives a high quality image with the features of high sensitivity and good linearity over the wide range of density. X-ray machine used is newly devised QR system (Shimadzu, Kyoto, Japan).[PURPOSE] To evaluate the utility of QR on detection of pulmonary lesions, clinical studies were performed with comparison of conventional chest radiography (CONV).[MATERIALS AND METHODS] Forty two patients were included in this study ; eighteen lung cancer, nine metastatic lung tumor, five interstitial pneumonia, four tuberculosis, one lymphoma, one hamartoma, one hypersensitivity pneumonitis, one viral pneumonia, one pneumoconiosis, one organizing pneumonia. Eight radiologists scored QR comparing with CONV by 7-point rating scale metho … More d. All observers scored the description of normal structures and abnormal shadows in the high film density area (HFDA : peripheral lung field) and in the low film density area (LEDA : retrocardiac or subdiaphragmatic area). The results were analyzed by Wilcoxon signed rank sum test.[RESULTS] QR was superior to CONV in the depiction of all normal structures and all kinds of abnormal shadows in the whole area (p<0.000 1). QR was superior to CONY in the-description of multiple pulmonary nodules especially in LFDA.[DISCUSSION] QR is a kind of digital imaging technique. This is quite different from conventional radiography or current digital radiography on the point that QR directly counts the number of photons which come into the semi-conductive sensor unit without any other media, for example, screen-film system or storage phosphor plate. Clinically, QR was superior to CONY for description of many kinds of normal structures and abnormal shadows in the whole film density area. This result might reflect the superior density resolution of QR and its superiority of density resolution might surpass slight inferiority of spatial resolution especially in the clinical evaluation. QR was thought to be a very useful digital diagnostic imaging of the thorax with wide dynamic range. Less

[简介] 光子计数 X 射线放射成像（量子放射成像：QR）提供通过直接测量穿透物体的 X 射线光子数量而产生的数字图像。光子通过 CdTe 多线传感器计算。它提供了高质量的图像，具有高灵敏度和在宽密度范围内良好的线性度的特点。使用的X射线机是新设计的QR系统（日本京都岛津公司）。[目的]为了评估QR在检测肺部病变方面的效用，与传统胸部X线摄影（CONV）进行比较进行临床研究。[材料与方法]本研究纳入42名患者；肺癌18例，肺转移瘤9例，间质性肺炎5例，肺结核4例，淋巴瘤1例，错构瘤1例，过敏性肺炎1例，病毒性肺炎1例，尘肺1例，机化性肺炎1例。八位放射科医生通过 7 点评分量表方法对 QR 与 CONV 进行比较……更多 d．所有观察者对高胶片密度区域（HFDA：周围肺野）和低胶片密度区域（LEDA：心后或膈下区域）中的正常结构和异常阴影的描述进行评分。结果采用Wilcoxon符号秩和检验进行分析。[结果]QR对全区所有正常结构及各类异常阴影的描绘均优于CONV(p<0.000 1)。 QR在描述多发性肺结节方面优于CONY，尤其是LFDA。[讨论]QR是一种数字成像技术。这与传统的射线照相或当前的数字射线照相有很大不同，因为QR直接计算进入半导体传感器单元的光子数量，而不需要任何其他介质，例如屏幕胶片系统或存储荧光板。临床上，QR对多种正常结构和全片密度区异常阴影的描述优于CONY。这一结果可能反映了QR优越的密度分辨率，尤其是在临床评估中，其密度分辨率的优越性可能超过空间分辨率的轻微劣势。 QR 被认为是一种非常有用的胸部数字诊断成像，具有宽动态范围。较少的