The Accuracy of Square Measure of Regions of Interest Using an NIH Image

DOI 3 Citations 4 References
  • YAMAKAMI Yoshio
    Department of Oral Physiology, Showa University School of Dentistry
  • SUGANUMA Takeshi
    The First Department of Prosthodontics, Showa University School of Dentistry
  • SHINYA Akiyuki
    The First Department of Prosthodontics, Showa University School of Dentistry
  • HORIKOSHI Naofumi
    The First Department of Prosthodontics, Showa University School of Dentistry
  • FURUYA Ryoichi
    The First Department of Prosthodontics, Showa University School of Dentistry
  • KAWAWA Tadaharu
    The First Department of Prosthodontics, Showa University School of Dentistry

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  • NIH Imageによる関心領域 (Regions of Interest) の面積の測定精度

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Abstract

The accuracy of square measure of regions of interest using an NIH Image was discussed. In this research, the area of circles, rhombuses and squares with various sizes which were digitally depicted on a display using Adobe Photoshop, were measured using an NIH Image. The errors between these measurements and the calculated values were examined. The areas of these figures were able to measure with accuracy below 1% above 20mm (57 pixels) in diameter or length of a side. Therefore, in order to make a measurement error smaller, it is necessary that a measuring object be indicated as largely as possible. In other words, the measuring objects must be input to a personal computer with high resolution and the number of pixels that compose a figure must be increased as much as possible.

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