7Peterson D K, Kino G S. Real-time digital image reconstruction: A descriptive of imaging hardware and analysis of quantitative errors [J]. IEEE Trans on Ultrasonics, 1984, 31(2) : 337 - 338.
9ASME B31.1. Code Case 179 Use of Ultrasonic Exami- nation in lieu of Radiography for B31. 1 Applications in Materials 1/2u8221X or less in Wall Thickness [S]. ASME 2006.
10ASME B31.3. Code Case 181 Use of Alternative Ultra- sonic Examination Acceptance Criteria in ASME B31. 3 [S]. ASME 2007.
