A-A-53327 Cassettes, Radiographic Film (Heavy Duty Type)This Commercial Item Description covers a heavy duty type radiographic film cassette with two high speed intensifying screens.

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A-A-53327A

The type II cassettes only, shall be furnished with a grid. The grid shall be the linear focused type having the following characteristics

The grid shall consist of narrow lead strips separated by fiber or plastic interspaces, transparent to x-rays. The entire grid shall be sealed in a strong, durable, low density aluminum envelope impervious to moisture. The grid shall be fitted snugly into the cassette frame, and shall be retained in position by the frame stiffeners. The grid shall be removable by removing the frame stiffeners. There shall be no fasteners in the grid area.

The intensifying screens shall be of a high speed type with a speed factor of not less than 1.6. The screens shall be mounted on a thin sheet of polyurethane foam on the cassette front and back to optimize film-screen contact. The screens shall be in accordance with the latest revision of ANSI Standrd PH1.50. Dimensions for Radiographic Film Cassette Intensifying Screens. This commercial item description shall govern in the event it deviates from the ANSI Standard.

The cassette shall be in accordance with the latest revision of ANSI Standard PH1.49. Specifications for Medical Radiographic Film Cassettes, except the thickness of the cassette shall not be less than 0.600 inch, nor more than 0.690 inch. This commercial item description shall govern in event it deviates from the ANSI standard.

The cassette shall be free of chips, cracks, scratches, and other appearance defects/

The cassette shall be clean and free of dirt, oil, and grease.

Workmanship. The radiographic film cassette shall be free from defects which detract from its appearance or impair its serviceability.

Unit. Each (EA). One cassette of the type and size specified, constitutes one unit.