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MIL-HDBK-728/5 Revision A, May 3, 1994
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Radiologic examination provides a nondestructive method of inspecting the internal continuity of a specimen. It is one of the earliest nondestructive practices, particularly in the various radiographic methods of testing and inspection. Recent advances in radioscopic and computed tomographic techniques have opened many more application areas to now make radiology one of the most modern nondestructive methods. Even though it is often expensive and involves extensive safety considerations, its uniqueness and applicability find it in wide use in manufacturing, research, and in medical diagnostics and therapy.

Although a study of radiologic testing might include only x-rays and their uses, this handbook includes both natural and artificial radiation sources with coverage of x-ray, gamma-ray (╬│-ray) and neutron-ray(N-ray) radiology.

As defined in ASTM Annual Book of Standards 03.03 on Nondestructive Testing, radiology is the science and application of all penetrating radiation, radiography incorporates direct conversation to a recording medium, and radioscopy is the electronic production of a radiological image that follows very closely the changes with time of the object being imaged.

This handbook provides the fundamental principles and guides associated with radiologic testing. It includes the theory of operation, the type of equipment, the advantages and disadvantages of the method, various applications and standards, and guides for specific disciplines. The information contained in Handbook 728/1 should be included with this handbook for general guidelines to the employment of all NDT methods and for a more complete understanding of radiologic testing as it compares with other basic methods.

Two DLA regulations which may be of interest to the reader are DLAR 8220.4 and DLAR 1000.28.