Design, testing, and clinical studies of a handheld polarized light camera.
Design, testing, and clinical studies of a handheld polarized light camera.
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DOI：
10.1117/1.1781667
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发表时间：
2004-11
影响因子：
3.5
通讯作者：
J. Ramella-Roman;Kenneth Lee;S. Prahl;S. Jacques
中科院分区：
文献类型：
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作者：
J. Ramella-Roman;Kenneth Lee;S. Prahl;S. Jacques
偏振光成像已被用于检测皮肤癌的边界和促进癌症边界的评估。本文介绍了一种廉价的手持式偏光相机的设计，并展示了用该样机获得的临床图像。该相机内置两个通用串行总线（USB）彩色摄像机，一个偏光分束器立方体和一个4倍物镜。照明由三个白色led和一个片状偏光片提供。以7帧/秒的速度对水平和垂直线偏振反射图像进行处理，得到的偏振图像显示在屏幕上。我们比较了廉价USB相机和16位电子冷却相机的性能。对暗噪声和图像重复性进行了比较。在这两种情况下，16位摄像头的性能都优于USB摄像头。尽管有这些限制，这个USB原型获得的结果是非常令人满意的。提出了手术前病变极化图像的例子。
Polarized light imaging has been used to detect the borders of skin cancer and facilitate assessment of cancer boundaries. A design for an inexpensive handheld polarized camera is presented and clinical images acquired with this prototype are shown. The camera is built with two universal serial bus (USB) color video cameras, a polarizing beamsplitter cube, and a 4x objective lens. Illumination is provided by three white LEDs and a sheet polarizer. Horizontal and vertical linearly polarized reflected images are processed at 7 frames/s and a resulting polarized image is displayed on screen. We compare the performances of cheap USB camera and a 16-bit electronically cooled camera. Dark noise and image repeatability are compared. In both cases, the 16-bit camera outperforms the USB cameras. Despite these limitations, the results obtained with this USB prototype are very satisfactory. Examples of polarized images of lesions taken prior to surgery are presented.