Embossed radiography utilizing an image-shifting subtraction program

作者：Sato Eiichi^*; Osawa Akihiro; Matsukiyo Hiroshi; Enomoto Toshiyuki; Watanabe Manabu; Takahashi Kiyomi; Sato Shigehiro; Ogawa Akira; Onagawa Jun

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2010, 619(1-3): 133-139.

DOI：10.1016/j.nima.2009.11.028

• Embossed radiography
• Subtraction program
• Single-energy subtraction
• Dual-energy subtraction
• Contrast resolution
• Polychromatic X-rays

We developed an image-shifting subtraction program and carried out embossed radiography (ER) utilizing single- and dual-energy subtractions. In particular, dual-energy subtraction was carried out to decrease the absorption contrast of unnecessary regions. The contrast resolution of a target region was increased using the subtraction program and a linear-contrast system in a flat panel detector (FPD). The X-ray generator had a 100 pm-focus tube, and the subtractions were performed at tube voltages of 40 and 70 kV, a tube current of 0.50 mA, and an X-ray exposure time of 5.0 s. ER was achieved with cohesion imaging using the FPD with pixel sizes of 48 x 48 mu m(2), and the shifting dimension of an object in the horizontal and vertical directions ranged from 48 to 96 pm. At a shifting distance of 96 pm, the spatial resolutions in the horizontal and vertical directions measured with a lead test chart were both 83 pm. In ER of animal phantoms, we obtained high-contrast embossed images of fine bones, gadolinium oxide particles in blood vessels, iodine-based microspheres in coronary arteries approximately 100 mu m in diameter.

• 出版日期2010-7-1