Olariu, Gheorghina (szerk.): Sesiunea Internaţională de Restaurare - Conservare (Satu Mare, 1997)
Investigaţii, conservare
other materials like Pb or Ag inside the object. There are also important to determine some defects inside the sample, some fragile parts of the object to take care in manipulation of the object or in restoration. The computerized tomography make possible to determine what kind of restorations is necessary or what methods were applied to restored objects. A complete tomogram of a archaeological object is, in the same time, a signature that prevent its substitution or imitation. 2. GENERAL DESCRIPTION OF DATA PROCESSING PROGRAMS FACILITIES The industrial computerized tomography method consist in the measurement of thin X or y- ray beam attenuation when passing through some selected surface of the tested object, along several directions, so that by means of an adequate mathematical algorithm, a map of linear attenuation coefficients for the scanned surface is obtained. In fact, this map gives the density of materials occurring in the surface plane. Fig. 1 shows a general drawing of the tomographic equipment made by the Computerized Control & NDT Systems Laboratory, within the SC ICPE SA Bucharest. Program packages are grouped in three different types according to the processing type: I. Programs for data acquisition and for reconstruction algorithms applications, intended for data acquisition programming using given parameters and for data reconstruction using selected tested object ilium 808 J scanner controller Fig . I 28
