Features Of An Ideal Cassette.
1) Light weight to facilitate easy handling and carrying.
2) Easy to open and close under low light condition.
3) No sharp edges or corner which might injure patient to staff.
4) Strong and rigid to withstand physical damage from daily wear and tear.
5) The front part must provide minimum beam attenuation be of uniform thickness and have no irregularities.
6) The internal rear surface must have adequate layer of lead foil attached to minimize the risk of back scatter.
7) Cassette construction should be so that that there is uniform contact between film and screen by the use of foam sponges.
8) Availability in range of film sizes.