Ultrasoft X-Ray Apparatus "Softex"

Dosimetry of Occupational Radiation around Panoramic X-ray Apparatus

Background: Panoramic imaging is one of the most common imaging methods in dentistry. Regarding the side-effects of ionizing radiation, it is necessary to survey different aspects and details of panoramic imaging. In this study, we compared the absorbed x-ray dose around two panoramic x-ray units: PM 2002 CC Proline (Planmeca, Helsinki, Finland) and Cranex Tome (Soredex, Helsinki, Finland).<br ...

dosimetry of occupational radiation around panoramic x-ray apparatus

background: panoramic imaging is one of the most common imaging methods in dentistry. regarding the side-effects of ionizing radiation, it is necessary to survey different aspects and details of panoramic imaging. in this study, we compared the absorbed x-ray dose around two panoramic x-ray units: pm 2002 cc proline (planmeca, helsinki, finland) and cranex tome (soredex, helsinki, finland). mat...

Ultrasoft Narrow - Line Seyfert 1 Galaxies and X - ray Surveys

We describe how recent X-ray surveys have led to advances in the understanding of ultrasoft narrow-line Seyfert 1 galaxies. The number of known ultrasoft narrow-line Seyfert 1s has increased greatly in recent years due to X-ray surveys, and it is now possible to obtain high quality 0.1–10 keV spectral and variability measurements for a large number of these galaxies. We generalize some of the c...

High temperature X-ray diffraction apparatus.

The Discovery of 8.7 S Pulsations from the Ultrasoft X–ray Source 4u 0142+61

We discovered an X–ray periodicity at ∼ 8.7 s from the direction of the two sources 4U 0142+61 and RX J0146.9+6121. The pulsations are visible only in the 1–4 keV range, during an observation obtained with EXOSAT in August 1984. In the same data, periodic oscillations at 25 minutes had been previously found in an additional hard spectral component above 4 keV. The newly discovered periodicity m...