| 摘要 |
PCT No. PCT/FI90/00071 Sec. 371 Date Sep. 23, 1991 Sec. 102(e) Date Sep. 23, 1991 PCT Filed Mar. 21, 1990 PCT Pub. No. WO90/11536 PCT Pub. Date Oct. 4, 1990.A transfer device for cassettes containing radioactive samples and a cassette system in a gamma counter provided with a well-type detector. The transfer device comprises a path (61), by which cassettes (11, 12, 13) can be moved one at a time to a lifting position where sample containers can be lifted and moved to the measuring unit (50) for measuring. At the lifting position a vertical long side of the cassette (11, 12, 13) is locked in place against a vertical surface or edge (63) of the table (61) so that the distance between the center of the sample container (17) in the cassette from the vertical surface or edge of the table is substantially directly proportional to the radius of the sample container. The cassette system comprises at least two different cassettes (11, 12, 13) which are of the same length but which can take a different number of adjacently placed sample containers (17 ) of different sizes. The sample containers in each cassette are the same size. The width of the cassette is directly proportional to the width of the sample containers placed therein. The cassettes are also symmetrical about their longitudinal axis so that the center line of the sample containers is coincident with the center line of the cassette. The two long sides of each cassette are nearly similar and vertical. |
