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xld"> <b>关于X光透视成像，大家都来讨论啊:</b><div class="postmsg">我光信息专业毕业，现在从事的职业是X射线管制造，我也学生物光学，但学完之后上面没有提到X光在医学中的作用。如果把X射线管制造归类为真空电子学方面，那X光应用绝对是生物医学方面的吧，请问各位为什么在生物医学上面没有提到X光影象学？我是有点不大理解，是因为X摄像在不久后的将来要被淘汰？还是其它什么原因？问的有点冒昧请各位见谅。虽然X射线管制造上面不存在什么问题，但是绝大多数是仿制，没有非常好的理论依据，很多东西都是靠经验来做成的，出现问题解决的不够彻底，而且关键性的射线管被国外垄断，按照现在国内的发展模式下去，迟早要走向末端。如果能够上CT项目，将对国家对人民都是非常有益处的，但是理论上面的贫乏注定了失败的命运，所以没有人想去尝试这个项目。我想一只CT管子几十万的价格是非常正常的，利润空间也是非常大，但我们国家却做不了，让人心寒啊。在此向个位请教X射线管应用方面的情况，希望能和大家有深度的交流，如果能够给我研究方向上面的指导，那我真是太感激了。给大家上传了射线管的概述。<br /> <br /> <br /> 顺便介绍一下我公司 <a href="http://www.ctct.org" target="_blank">www.ctct.org</a> 在质量方面不用担心，十七大过后质量才是硬道理啦<br /> <br /> [<i> 本帖最后由 天空的光 于 2007-10-18 10:09 编辑 </i>]</div> <div class="postmsg">我做X射线成像，希望多交流.<br /> 国产管子，多为低端。高端产品的研制，需大量投入，不单纯是钱。<br /> 在医学上,X射线影像技术在更方便更简单的方法出现前是不会被淘汰的。<br /> 学科分类的原因，是它与光学里得比较远。</div> <div class="postmsg">谢谢你啦<br /> 我知道焦点对X射线管成像非常重要，但也不一定是越小越好，我们在设计管子的时候一般考虑的是将管子和外国原管子仿制成尽量的一样，做的非常的被动。因为很多应用者自己也不关心自己X光机的性能及要求，我觉得要开发好一台好的X光机要有三方面的准备，所要求的影象对X射线的要求，X射线对X射线管的要求，X射线管对整机的要求。这样看下来，管子必然是核心，成功与否都要看它了，前端与后端我们国家做的不一定好，但是还能做吧，对于管子真的没有话说，旋转管上面的轴承还一点办法都没有，声音大的让人觉得飞机开过一样。当然有非常多的老技术工人靠经验来调整轴承，但不是非常稳定的，一百只管子声音是一百个样。大家都知道X光的性能比较特殊，所以很多的人在研究其用途，我看多了，什么希奇古怪用法的客户都有。随着光电学，显示技术及相关学科的发展，应用方面的研究进展的都比较顺利了。<br /> 你是做影象的，有很多东西可以探讨的。我们做管子对射线剂量没有测试的，只测试焦点的，就算是一个光功率或光通量的概念吧，这个东西对你们成象的有没有影响呢？能不能和我讲讲你做影象的感受呢？</div> <div class="postmsg">焦点大小直接影响图像的空间分辨率，是球管的重要指标。其次是电参数，热容量等。<br /> 我做影像增强器时，看到高质量的球管成像质量就好，差的就要提高增强器的质量。测试指标主要是空间分辨率。</div> <div class="postmsg">发本x射线资料<<医学影像物理学>></div> <div class="postmsg">呵呵 谢谢你啦<br /> 非常感谢你的资料了<br /> 我想问一下 你是在医院里工作呢 还是学校呢 还是公司里呢<br /> 我看你不象个医生 应该是在学校里吧</div> <div class="postmsg"><img src="static/image/smiley/default/em49.gif" smilieid="78" border="0" alt="" /> <img src="static/image/smiley/default/em49.gif" smilieid="78" border="0" alt="" /> <img src="static/image/smiley/default/em49.gif" smilieid="78" border="0" alt="" /> <img src="static/image/smiley/default/em49.gif" smilieid="78" border="0" alt="" /> <img src="static/image/smiley/default/em49.gif" smilieid="78" border="0" alt="" /></div> <div class="postmsg">大家顶顶<img src="static/image/smiley/default/em30.gif" smilieid="59" border="0" alt="" /> <img src="static/image/smiley/default/em30.gif" smilieid="59" border="0" alt="" /> <img src="static/image/smiley/default/em30.gif" smilieid="59" border="0" alt="" /> <img src="static/image/smiley/default/em30.gif" smilieid="59" border="0" alt="" /> <img src="static/image/smiley/default/em30.gif" smilieid="59" border="0" alt="" /></div> <div class="postmsg">有人知道X光的功率怎么测么？？<br /> X光出的计量的大小有没有简单的设备可以检测？？<br /> X光球管电噪声有没有办法测？？</div> <div class="postmsg">国内不知道怎么搞的？研发不出x射线平板探测</div> <div class="postmsg">测量剂量用射线剂量测量仪，光功率测量不知道，现实中多是据测量的球管阳极高压与电流计算得出的。<br /> X光球管电噪声不知道如何测。</div> <div class="postmsg">x射线平板探测的制造，涉及多学科，多领域。如光学，光电子，电子，半导体，材料，等。国内也有多家单位研究，无奈这是烧钱的东西，需要投入太多。只能做些皮毛的东西。</div> <div class="postmsg">真晕 怪不得管子做出来给老外拿去 有很多意见<br /> 现在是手段没有同步 他们给管子测的很多数据 我们没有办法验证<br /> 所以老欺负人 <img src="static/image/smiley/default/em30.gif" smilieid="59" border="0" alt="" /></div> <div class="postmsg">以后很可能要涉足这方面的工作了,学习学习!</div> <div class="postmsg">上次说的关于X射线球管噪声的事情<br /> 我很难从另一个角度来想这个事情 <br /> 我们一般有个漏电流（暗电流）检测工艺 <br /> 对于球管只加高压，灯丝不亮的情况下，用示波器来观测管电流<br /> 我想出现的就是一种噪声 一般要求都是在uA级以下的<br /> <br /> 我把老外测试我公司X射线球管的测试项列出来，希望对大家有帮助：<br /> Dimension Verification<br /> Dark Current &Noise Measurement<br /> Burn-In(monitor occurrence of internal arcs)<br /> High mA<br /> High kV<br /> Rise/Fall Time(Flux,kV,mA)<br /> Pulse Cycle<br /> Focal Spot Size<br /> Focal SPot Position Stability<br /> Half Value Layer<br /> Beam Intensity Stability<br /> X-Ray Uniform Beam Fan Flux Distribution<br /> Inherent Filtration<br /> X-Ray Beam Resolution<br /> Leakage Rediation Survey <br /> Life Test</div> <div class="postmsg"><img src="static/image/smiley/default/em49.gif" smilieid="78" border="0" alt="" /> <img src="static/image/smiley/default/em49.gif" smilieid="78" border="0" alt="" /> <img src="static/image/smiley/default/em49.gif" smilieid="78" border="0" alt="" /> <img src="static/image/smiley/default/em49.gif" smilieid="78" border="0" alt="" /> <br /> x射线肯定不会淘汰，至少在本世纪不会<br /> 它的应用正在扩大，<br /> 而且多用于尖端</div> <div class="postmsg">上面的深受鼓舞 希望如同你所言<br /> <img src="static/image/smiley/default/em17.gif" smilieid="46" border="0" alt="" /> <img src="static/image/smiley/default/em17.gif" smilieid="46" border="0" alt="" /> <img src="static/image/smiley/default/em17.gif" smilieid="46" border="0" alt="" /> <img src="static/image/smiley/default/em17.gif" smilieid="46" border="0" alt="" /></div> <div style="height200px;"></div> <ul class="xl xl2 cl" style="border-top: 1px #cccccc dashed;margin:5px 0 ;padding-top:5px"> <dl><b> 同一主题资料:</b></dl><dl class='icon'><img src="static/image/filetype/rar.gif" border="0" class="vm" alt="" /> <a href="attachcenter-page.html?aid=15877" 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